node_modules ignore

server/node_modules/broadcast-channel/.github/FUNDING.yml

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+# These are supported funding model platforms
+
+github: pubkey

server/node_modules/broadcast-channel/.github/README.md

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+
+<p align="center">
+  <a href="https://github.com/pubkey/broadcast-channel">
+    <img src="../docs/files/icon.png" width="150px" />
+  </a>
+</p>
+
+<h1 align="center">BroadcastChannel</h1>
+<p align="center">
+  <strong>A BroadcastChannel to send data between different browser-tabs or nodejs-processes</strong>
+  <br/>
+  <span>+ LeaderElection over the channels</span><br />
+</p>
+
+<p align="center">
+    <a href="https://twitter.com/pubkeypubkey">
+        <img src="https://img.shields.io/twitter/follow/pubkeypubkey.svg?style=social&logo=twitter"
+            alt="follow on Twitter"></a>
+</p>
+
+![demo.gif](../docs/files/demo.gif)
+
+* * *
+
+A BroadcastChannel that allows you to send data between different browser-tabs or nodejs-processes.
+
+- It works completely **client-side** and **offline**.
+- Tested on **old browsers**, **new browsers**, **WebWorkers**, **Iframes** and **NodeJs**
+
+This behaves similar to the [BroadcastChannel-API](https://developer.mozilla.org/en-US/docs/Web/API/Broadcast_Channel_API) which is currently only featured in [some browsers](https://caniuse.com/#feat=broadcastchannel).
+
+## Using the BroadcastChannel
+
+```bash
+npm install --save broadcast-channel
+```
+
+#### Create a channel in one tab/process and send a message.
+
+```ts
+import { BroadcastChannel } from 'broadcast-channel';
+const channel = new BroadcastChannel('foobar');
+channel.postMessage('I am not alone');
+```
+
+#### Create a channel with the same name in another tab/process and recieve messages.
+
+```ts
+import { BroadcastChannel } from 'broadcast-channel';
+const channel = new BroadcastChannel('foobar');
+channel.onmessage = msg => console.dir(msg);
+// > 'I am not alone'
+```
+
+
+#### Add and remove multiple eventlisteners
+
+```ts
+import { BroadcastChannel } from 'broadcast-channel';
+const channel = new BroadcastChannel('foobar');
+
+const handler = msg => console.log(msg);
+channel.addEventListener('message', handler);
+
+// remove it
+channel.removeEventListener('message', handler);
+```
+
+#### Close the channel if you do not need it anymore.
+Returns a `Promise` that resolved when everything is processed.
+
+```js
+await channel.close();
+```
+
+#### Set options when creating a channel (optional):
+
+```js
+const options = {
+    type: 'localstorage', // (optional) enforce a type, oneOf['native', 'idb', 'localstorage', 'node']
+    webWorkerSupport: true; // (optional) set this to false if you know that your channel will never be used in a WebWorker (increases performance)
+};
+const channel = new BroadcastChannel('foobar', options);
+```
+
+#### Create a typed channel in typescript:
+
+```typescript
+import { BroadcastChannel } from 'broadcast-channel';
+declare type Message = {
+  foo: string;
+};
+const channel: BroadcastChannel<Message> = new BroadcastChannel('foobar');
+channel.postMessage({
+  foo: 'bar'
+});
+```
+
+#### Enforce a options globally
+
+When you use this module in a test-suite, it is recommended to enforce the fast `simulate` method on all channels so your tests run faster. You can do this with `enforceOptions()`. If you set this, all channels have the enforced options, no mather what options are given in the constructor.
+
+```typescript
+import { enforceOptions } from 'broadcast-channel';
+
+// enforce this config for all channels
+enforceOptions({
+  type: 'simulate'
+});
+
+// reset the enforcement
+enforceOptions(null);
+```
+
+
+#### Clear tmp-folder:
+When used in NodeJs, the BroadcastChannel will communicate with other processes over filesystem based sockets.
+When you create a huge amount of channels, like you would do when running unit tests, you might get problems because there are too many folders in the tmp-directory. Calling `BroadcastChannel.clearNodeFolder()` will clear the tmp-folder and it is recommended to run this at the beginning of your test-suite.
+
+```typescript
+import { clearNodeFolder } from 'broadcast-channel';
+// jest
+beforeAll(async () => {
+  const hasRun = await clearNodeFolder();
+  console.log(hasRun); // > true on NodeJs, false on Browsers
+})
+```
+
+```typescript
+import { clearNodeFolder } from 'broadcast-channel';
+// mocha
+before(async () => {
+  const hasRun = await clearNodeFolder();
+  console.log(hasRun); // > true on NodeJs, false on Browsers
+})
+```
+
+#### Handling IndexedDB onclose events
+
+IndexedDB databases can close unexpectedly for various reasons. This could happen, for example, if the underlying storage is removed or if the user clears the database in the browser's history preferences. Most often we have seen this happen in Mobile Safari. By default, we let the connection close and stop polling for changes. If you would like to continue listening you should close BroadcastChannel and create a new one.
+
+Example of how you might do this:
+
+```typescript
+import { BroadcastChannel } from 'broadcast-channel';
+
+let channel;
+
+const createChannel = () => {
+  channel = new BroadcastChannel(CHANNEL_NAME, {
+    idb: {
+      onclose: () => {
+        // the onclose event is just the IndexedDB closing.
+        // you should also close the channel before creating
+        // a new one.
+        channel.close();
+        createChannel();
+      },
+    },
+  });
+
+  channel.onmessage = message => {
+    // handle message
+  };
+};
+```
+
+## Methods:
+
+Depending in which environment this is used, a proper method is automatically selected to ensure it always works.
+
+| Method           | Used in                                                         | Description                                                                                                                                             |
+| ---------------- | --------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| **Native**       | [Modern Browsers](https://caniuse.com/broadcastchannel)         | If the browser supports the BroadcastChannel-API, this method will be used because it is the fastest                                                    |
+| **IndexedDB**    | [Browsers with WebWorkers](https://caniuse.com/#feat=indexeddb) | If there is no native BroadcastChannel support, the IndexedDB method is used because it supports messaging between browser-tabs, iframes and WebWorkers |
+| **LocalStorage** | [Older Browsers](https://caniuse.com/#feat=namevalue-storage)   | In older browsers that do not support IndexedDb, a localstorage-method is used                                                                          |
+| **Sockets**      | NodeJs                                                          | In NodeJs the communication is handled by sockets that send each other messages                                                                         |
+| **Simulate**      | none per default                                                          | This method simulates the behavior of the other methods but only runs in the current process without sharing data between processes. Use this method in your test-suite because it is much faster.                                                                  |
+
+
+
+## Using the LeaderElection
+
+This module also comes with a leader-election which can be used so elect a leader between different BroadcastChannels.
+For example if you have a stable connection from the frontend to your server, you can use the LeaderElection to save server-side performance by only connecting once, even if the user has opened your website in multiple tabs.
+
+In this example the leader is marked with the crown ♛:
+![leader-election.gif](../docs/files/leader-election.gif)
+
+
+Create a channel and an elector.
+
+```ts
+import {
+  BroadcastChannel,
+  createLeaderElection
+} from 'broadcast-channel';
+const channel = new BroadcastChannel('foobar');
+const elector = createLeaderElection(channel);
+```
+
+Wait until the elector becomes leader.
+
+```js
+import { createLeaderElection } from 'broadcast-channel';
+const elector = createLeaderElection(channel);
+elector.awaitLeadership().then(()=> {
+  console.log('this tab is now leader');
+})
+```
+
+If more than one tab is becoming leader adjust `LeaderElectionOptions` configuration.
+
+```js
+import { createLeaderElection } from 'broadcast-channel';
+const elector = createLeaderElection(channel, {
+  fallbackInterval: 2000, // optional configuration for how often will renegotiation for leader occur
+  responseTime: 1000, // optional configuration for how long will instances have to respond
+});
+elector.awaitLeadership().then(()=> {
+  console.log('this tab is now leader');
+})
+```
+
+Let the leader die. (automatically happens if the tab is closed or the process exits).
+
+```js
+const elector = createLeaderElection(channel);
+await elector.die();
+```
+
+Handle duplicate leaders. This can happen on rare occurences like when the [CPU is on 100%](https://github.com/pubkey/broadcast-channel/issues/385) for longer time, or the browser [has throttled the javascript timers](https://github.com/pubkey/broadcast-channel/issues/414).
+
+```js
+const elector = createLeaderElection(channel);
+elector.onduplicate = () => {
+  alert('have duplicate leaders!');
+}
+```
+
+
+## What this is
+
+This module is optimised for:
+
+- **low latency**: When you postMessage on one channel, it should take as low as possible time until other channels recieve the message.
+- **lossless**: When you send a message, it should be impossible that the message is lost before other channels recieved it
+- **low idle workload**: During the time when no messages are send, there should be a low processor footprint.
+
+## What this is not
+
+-   This is not a polyfill. Do not set this module to `window.BroadcastChannel`. This implementation behaves similiar to the [BroadcastChannel-Standard](https://developer.mozilla.org/en-US/docs/Web/API/Broadcast_Channel_API) with these limitations:
+    - You can only send data that can be `JSON.stringify`-ed.
+    - While the offical API emits [onmessage-events](https://developer.mozilla.org/en-US/docs/Web/API/BroadcastChannel/onmessage), this module directly emitts the data which was posted
+-   This is not a replacement for a message queue. If you use this in NodeJs and want send more than 50 messages per second, you should use proper [IPC-Tooling](https://en.wikipedia.org/wiki/Message_queue)
+
+
+## Browser Support
+I have tested this in all browsers that I could find. For ie8 and ie9 you must transpile the code before you can use this. If you want to know if this works with your browser, [open the demo page](https://pubkey.github.io/broadcast-channel/e2e.html).
+
+## Thanks
+Thanks to [Hemanth.HM](https://github.com/hemanth) for the module name.

server/node_modules/broadcast-channel/.github/workflows/main.yml

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+# This is a basic workflow to help you get started with Actions
+
+name: CI
+
+# Controls when the action will run. 
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  all:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-18.04
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+
+      # https://docs.github.com/en/free-pro-team@latest/actions/guides/caching-dependencies-to-speed-up-workflows
+      - name: Reuse npm cache folder
+        uses: actions/cache@v2
+        env:
+          cache-name: cache-node-modules
+        with:
+          # reuse the npm-cache and some node_modules folders
+          path: |
+            ~/.npm
+            ./node_modules
+            ./test-electron/node_modules
+          # invalidate cache when any package.json changes
+          key: ${{ runner.os }}-npm-${{ env.cache-name }}-${{ hashFiles('**/package.json') }}
+          restore-keys: |
+            ${{ runner.os }}-npm-${{ env.cache-name }}-
+            ${{ runner.os }}-npm-
+            ${{ runner.os }}-
+
+      # install
+      - name: install node modules
+        run: npm install
+
+      - name: build
+        run: npm run build
+
+      - name: check build size webpack
+        run: npm run size:webpack
+
+      - name: check build size browserify
+        run: npm run size:browserify
+
+      - name: check build size rollup
+        run: npm run size:rollup
+
+      - name: code format
+        run: npm run lint
+
+      - name: test typings
+        run: npm run test:typings
+
+      - name: test node
+        run: npm run test:node
+
+      - name: test browser
+        uses: GabrielBB/xvfb-action@v1
+        with:
+          working-directory: ./ #optional
+          run: npm run test:browser
+
+      - name: test performance
+        run: npm run test:performance
+
+      - name: test e2e
+        uses: GabrielBB/xvfb-action@v1
+        with:
+          working-directory: ./ #optional
+          run: npm run test:e2e
+
+# TODO this does not work atm. fix this.
+#      - name: test electron
+#        uses: GabrielBB/xvfb-action@v1
+#        with:
+#          working-directory: ./test-electron
+#          run: npm install --depth 0 --silent && npm run test

server/node_modules/broadcast-channel/CHANGELOG.md

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+# CHANGELOG
+
+## X.X.X (comming soon)
+
+## 3.7.0 (13 June 2021)
+
+Other:
+  - Moved `ObliviousSet` into [its own npm module](https://www.npmjs.com/package/oblivious-set)
+
+## 3.6.0 (19 May 2021)
+
+Features:
+  - Added `BroadcastChannel.isClosed` [#544](https://github.com/pubkey/broadcast-channel/issues/544)
+
+Other:
+  - Updated dependencies to work with newer node versions
+
+## 3.5.3 (11 March 2021)
+
+Bugfixes:
+  - Fixed broken typings
+
+## 3.5.2 (11 March 2021)
+
+Bugfixes:
+  - `BroadcastChannel.close()` waits for all ongoing message sending to be finished before resolving.
+
+## 3.5.0 (11 March 2021)
+
+Features:
+  - Added `LeaderElector.onduplicate`
+
+## 3.4.0 (24 January 2021)
+
+Bugfixes:
+  - fix cursor error in Safari [#420](https://github.com/pubkey/broadcast-channel/pull/420)
+
+## 3.3.0 (20 October 2020)
+
+Bugfixes:
+  - `new BroadcastChannel().close()` should not resolve before all cleanup is done  [#348](https://github.com/pubkey/broadcast-channel/pull/348)

server/node_modules/broadcast-channel/LICENSE

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+MIT License
+
+Copyright (c) 2018 Daniel Meyer
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

server/node_modules/broadcast-channel/README.md

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+<!--
+    This is a different REDME file which will be published to npm
+    The one for GitHub is in .github directory.
+
+    @link https://stackoverflow.com/a/65676410/3443137
+
+    The problem was that google indexed the npm-site instead of the github site
+-->
+
+<p align="center">
+  <a href="https://github.com/pubkey/broadcast-channel">
+    <img src="./docs/files/icon.png" width="150px" />
+  </a>
+</p>
+
+<h1 align="center">BroadcastChannel</h1>
+<p align="center">
+  <strong>A BroadcastChannel that works in old browsers, new browsers, WebWorkers and NodeJs</strong>
+  <br/>
+  <span>+ LeaderElection over the channels</span>
+</p>
+
+<p align="center">
+    <a href="https://twitter.com/pubkeypubkey">
+        <img src="https://img.shields.io/twitter/follow/pubkeypubkey.svg?style=social&logo=twitter"
+            alt="follow on Twitter"></a>
+</p>
+
+![demo.gif](docs/files/demo.gif)
+
+* * *
+
+A BroadcastChannel that allows you to send data between different browser-tabs or nodejs-processes.
+And a LeaderElection over the channels.
+
+# [Read the full documentation on github](https://github.com/pubkey/broadcast-channel)

server/node_modules/broadcast-channel/dist/es/broadcast-channel.js

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+import { isPromise } from './util.js';
+import { chooseMethod } from './method-chooser.js';
+import { fillOptionsWithDefaults } from './options.js';
+export var BroadcastChannel = function BroadcastChannel(name, options) {
+  this.name = name;
+
+  if (ENFORCED_OPTIONS) {
+    options = ENFORCED_OPTIONS;
+  }
+
+  this.options = fillOptionsWithDefaults(options);
+  this.method = chooseMethod(this.options); // isListening
+
+  this._iL = false;
+  /**
+   * _onMessageListener
+   * setting onmessage twice,
+   * will overwrite the first listener
+   */
+
+  this._onML = null;
+  /**
+   * _addEventListeners
+   */
+
+  this._addEL = {
+    message: [],
+    internal: []
+  };
+  /**
+   * Unsend message promises
+   * where the sending is still in progress
+   * @type {Set<Promise>}
+   */
+
+  this._uMP = new Set();
+  /**
+   * _beforeClose
+   * array of promises that will be awaited
+   * before the channel is closed
+   */
+
+  this._befC = [];
+  /**
+   * _preparePromise
+   */
+
+  this._prepP = null;
+
+  _prepareChannel(this);
+}; // STATICS
+
+/**
+ * used to identify if someone overwrites
+ * window.BroadcastChannel with this
+ * See methods/native.js
+ */
+
+BroadcastChannel._pubkey = true;
+/**
+ * clears the tmp-folder if is node
+ * @return {Promise<boolean>} true if has run, false if not node
+ */
+
+export function clearNodeFolder(options) {
+  options = fillOptionsWithDefaults(options);
+  var method = chooseMethod(options);
+
+  if (method.type === 'node') {
+    return method.clearNodeFolder().then(function () {
+      return true;
+    });
+  } else {
+    return Promise.resolve(false);
+  }
+}
+/**
+ * if set, this method is enforced,
+ * no mather what the options are
+ */
+
+var ENFORCED_OPTIONS;
+export function enforceOptions(options) {
+  ENFORCED_OPTIONS = options;
+} // PROTOTYPE
+
+BroadcastChannel.prototype = {
+  postMessage: function postMessage(msg) {
+    if (this.closed) {
+      throw new Error('BroadcastChannel.postMessage(): ' + 'Cannot post message after channel has closed');
+    }
+
+    return _post(this, 'message', msg);
+  },
+  postInternal: function postInternal(msg) {
+    return _post(this, 'internal', msg);
+  },
+
+  set onmessage(fn) {
+    var time = this.method.microSeconds();
+    var listenObj = {
+      time: time,
+      fn: fn
+    };
+
+    _removeListenerObject(this, 'message', this._onML);
+
+    if (fn && typeof fn === 'function') {
+      this._onML = listenObj;
+
+      _addListenerObject(this, 'message', listenObj);
+    } else {
+      this._onML = null;
+    }
+  },
+
+  addEventListener: function addEventListener(type, fn) {
+    var time = this.method.microSeconds();
+    var listenObj = {
+      time: time,
+      fn: fn
+    };
+
+    _addListenerObject(this, type, listenObj);
+  },
+  removeEventListener: function removeEventListener(type, fn) {
+    var obj = this._addEL[type].find(function (obj) {
+      return obj.fn === fn;
+    });
+
+    _removeListenerObject(this, type, obj);
+  },
+  close: function close() {
+    var _this = this;
+
+    if (this.closed) {
+      return;
+    }
+
+    this.closed = true;
+    var awaitPrepare = this._prepP ? this._prepP : Promise.resolve();
+    this._onML = null;
+    this._addEL.message = [];
+    return awaitPrepare // wait until all current sending are processed
+    .then(function () {
+      return Promise.all(Array.from(_this._uMP));
+    }) // run before-close hooks
+    .then(function () {
+      return Promise.all(_this._befC.map(function (fn) {
+        return fn();
+      }));
+    }) // close the channel
+    .then(function () {
+      return _this.method.close(_this._state);
+    });
+  },
+
+  get type() {
+    return this.method.type;
+  },
+
+  get isClosed() {
+    return this.closed;
+  }
+
+};
+/**
+ * Post a message over the channel
+ * @returns {Promise} that resolved when the message sending is done
+ */
+
+function _post(broadcastChannel, type, msg) {
+  var time = broadcastChannel.method.microSeconds();
+  var msgObj = {
+    time: time,
+    type: type,
+    data: msg
+  };
+  var awaitPrepare = broadcastChannel._prepP ? broadcastChannel._prepP : Promise.resolve();
+  return awaitPrepare.then(function () {
+    var sendPromise = broadcastChannel.method.postMessage(broadcastChannel._state, msgObj); // add/remove to unsend messages list
+
+    broadcastChannel._uMP.add(sendPromise);
+
+    sendPromise["catch"]().then(function () {
+      return broadcastChannel._uMP["delete"](sendPromise);
+    });
+    return sendPromise;
+  });
+}
+
+function _prepareChannel(channel) {
+  var maybePromise = channel.method.create(channel.name, channel.options);
+
+  if (isPromise(maybePromise)) {
+    channel._prepP = maybePromise;
+    maybePromise.then(function (s) {
+      // used in tests to simulate slow runtime
+
+      /*if (channel.options.prepareDelay) {
+           await new Promise(res => setTimeout(res, this.options.prepareDelay));
+      }*/
+      channel._state = s;
+    });
+  } else {
+    channel._state = maybePromise;
+  }
+}
+
+function _hasMessageListeners(channel) {
+  if (channel._addEL.message.length > 0) return true;
+  if (channel._addEL.internal.length > 0) return true;
+  return false;
+}
+
+function _addListenerObject(channel, type, obj) {
+  channel._addEL[type].push(obj);
+
+  _startListening(channel);
+}
+
+function _removeListenerObject(channel, type, obj) {
+  channel._addEL[type] = channel._addEL[type].filter(function (o) {
+    return o !== obj;
+  });
+
+  _stopListening(channel);
+}
+
+function _startListening(channel) {
+  if (!channel._iL && _hasMessageListeners(channel)) {
+    // someone is listening, start subscribing
+    var listenerFn = function listenerFn(msgObj) {
+      channel._addEL[msgObj.type].forEach(function (obj) {
+        if (msgObj.time >= obj.time) {
+          obj.fn(msgObj.data);
+        }
+      });
+    };
+
+    var time = channel.method.microSeconds();
+
+    if (channel._prepP) {
+      channel._prepP.then(function () {
+        channel._iL = true;
+        channel.method.onMessage(channel._state, listenerFn, time);
+      });
+    } else {
+      channel._iL = true;
+      channel.method.onMessage(channel._state, listenerFn, time);
+    }
+  }
+}
+
+function _stopListening(channel) {
+  if (channel._iL && !_hasMessageListeners(channel)) {
+    // noone is listening, stop subscribing
+    channel._iL = false;
+    var time = channel.method.microSeconds();
+    channel.method.onMessage(channel._state, null, time);
+  }
+}

server/node_modules/broadcast-channel/dist/es/browserify.index.js

@@ -0,0 +1,6 @@
+var module = require('./index.es5.js');
+
+var BroadcastChannel = module.BroadcastChannel;
+var createLeaderElection = module.createLeaderElection;
+window['BroadcastChannel2'] = BroadcastChannel;
+window['createLeaderElection'] = createLeaderElection;

server/node_modules/broadcast-channel/dist/es/index.es5.js

@@ -0,0 +1,16 @@
+/**
+ * because babel can only export on default-attribute,
+ * we use this for the non-module-build
+ * this ensures that users do not have to use
+ * var BroadcastChannel = require('broadcast-channel').default;
+ * but
+ * var BroadcastChannel = require('broadcast-channel');
+ */
+import { BroadcastChannel, createLeaderElection, clearNodeFolder, enforceOptions, beLeader } from './index.js';
+module.exports = {
+  BroadcastChannel: BroadcastChannel,
+  createLeaderElection: createLeaderElection,
+  clearNodeFolder: clearNodeFolder,
+  enforceOptions: enforceOptions,
+  beLeader: beLeader
+};

server/node_modules/broadcast-channel/dist/es/index.js

@@ -0,0 +1,2 @@
+export { BroadcastChannel, clearNodeFolder, enforceOptions } from './broadcast-channel';
+export { createLeaderElection, beLeader } from './leader-election';

server/node_modules/broadcast-channel/dist/es/leader-election.js

@@ -0,0 +1,262 @@
+import { sleep, randomToken } from './util.js';
+import unload from 'unload';
+
+var LeaderElection = function LeaderElection(channel, options) {
+  this._channel = channel;
+  this._options = options;
+  this.isLeader = false;
+  this.isDead = false;
+  this.token = randomToken();
+  this._isApl = false; // _isApplying
+
+  this._reApply = false; // things to clean up
+
+  this._unl = []; // _unloads
+
+  this._lstns = []; // _listeners
+
+  this._invs = []; // _intervals
+
+  this._dpL = function () {}; // onduplicate listener
+
+
+  this._dpLC = false; // true when onduplicate called
+};
+
+LeaderElection.prototype = {
+  applyOnce: function applyOnce() {
+    var _this = this;
+
+    if (this.isLeader) return Promise.resolve(false);
+    if (this.isDead) return Promise.resolve(false); // do nothing if already running
+
+    if (this._isApl) {
+      this._reApply = true;
+      return Promise.resolve(false);
+    }
+
+    this._isApl = true;
+    var stopCriteria = false;
+    var recieved = [];
+
+    var handleMessage = function handleMessage(msg) {
+      if (msg.context === 'leader' && msg.token != _this.token) {
+        recieved.push(msg);
+
+        if (msg.action === 'apply') {
+          // other is applying
+          if (msg.token > _this.token) {
+            // other has higher token, stop applying
+            stopCriteria = true;
+          }
+        }
+
+        if (msg.action === 'tell') {
+          // other is already leader
+          stopCriteria = true;
+        }
+      }
+    };
+
+    this._channel.addEventListener('internal', handleMessage);
+
+    var ret = _sendMessage(this, 'apply') // send out that this one is applying
+    .then(function () {
+      return sleep(_this._options.responseTime);
+    }) // let others time to respond
+    .then(function () {
+      if (stopCriteria) return Promise.reject(new Error());else return _sendMessage(_this, 'apply');
+    }).then(function () {
+      return sleep(_this._options.responseTime);
+    }) // let others time to respond
+    .then(function () {
+      if (stopCriteria) return Promise.reject(new Error());else return _sendMessage(_this);
+    }).then(function () {
+      return beLeader(_this);
+    }) // no one disagreed -> this one is now leader
+    .then(function () {
+      return true;
+    })["catch"](function () {
+      return false;
+    }) // apply not successfull
+    .then(function (success) {
+      _this._channel.removeEventListener('internal', handleMessage);
+
+      _this._isApl = false;
+
+      if (!success && _this._reApply) {
+        _this._reApply = false;
+        return _this.applyOnce();
+      } else return success;
+    });
+
+    return ret;
+  },
+  awaitLeadership: function awaitLeadership() {
+    if (
+    /* _awaitLeadershipPromise */
+    !this._aLP) {
+      this._aLP = _awaitLeadershipOnce(this);
+    }
+
+    return this._aLP;
+  },
+
+  set onduplicate(fn) {
+    this._dpL = fn;
+  },
+
+  die: function die() {
+    var _this2 = this;
+
+    if (this.isDead) return;
+    this.isDead = true;
+
+    this._lstns.forEach(function (listener) {
+      return _this2._channel.removeEventListener('internal', listener);
+    });
+
+    this._invs.forEach(function (interval) {
+      return clearInterval(interval);
+    });
+
+    this._unl.forEach(function (uFn) {
+      uFn.remove();
+    });
+
+    return _sendMessage(this, 'death');
+  }
+};
+
+function _awaitLeadershipOnce(leaderElector) {
+  if (leaderElector.isLeader) return Promise.resolve();
+  return new Promise(function (res) {
+    var resolved = false;
+
+    function finish() {
+      if (resolved) {
+        return;
+      }
+
+      resolved = true;
+      clearInterval(interval);
+
+      leaderElector._channel.removeEventListener('internal', whenDeathListener);
+
+      res(true);
+    } // try once now
+
+
+    leaderElector.applyOnce().then(function () {
+      if (leaderElector.isLeader) {
+        finish();
+      }
+    }); // try on fallbackInterval
+
+    var interval = setInterval(function () {
+      leaderElector.applyOnce().then(function () {
+        if (leaderElector.isLeader) {
+          finish();
+        }
+      });
+    }, leaderElector._options.fallbackInterval);
+
+    leaderElector._invs.push(interval); // try when other leader dies
+
+
+    var whenDeathListener = function whenDeathListener(msg) {
+      if (msg.context === 'leader' && msg.action === 'death') {
+        leaderElector.applyOnce().then(function () {
+          if (leaderElector.isLeader) finish();
+        });
+      }
+    };
+
+    leaderElector._channel.addEventListener('internal', whenDeathListener);
+
+    leaderElector._lstns.push(whenDeathListener);
+  });
+}
+/**
+ * sends and internal message over the broadcast-channel
+ */
+
+
+function _sendMessage(leaderElector, action) {
+  var msgJson = {
+    context: 'leader',
+    action: action,
+    token: leaderElector.token
+  };
+  return leaderElector._channel.postInternal(msgJson);
+}
+
+export function beLeader(leaderElector) {
+  leaderElector.isLeader = true;
+  var unloadFn = unload.add(function () {
+    return leaderElector.die();
+  });
+
+  leaderElector._unl.push(unloadFn);
+
+  var isLeaderListener = function isLeaderListener(msg) {
+    if (msg.context === 'leader' && msg.action === 'apply') {
+      _sendMessage(leaderElector, 'tell');
+    }
+
+    if (msg.context === 'leader' && msg.action === 'tell' && !leaderElector._dpLC) {
+      /**
+       * another instance is also leader!
+       * This can happen on rare events
+       * like when the CPU is at 100% for long time
+       * or the tabs are open very long and the browser throttles them.
+       * @link https://github.com/pubkey/broadcast-channel/issues/414
+       * @link https://github.com/pubkey/broadcast-channel/issues/385
+       */
+      leaderElector._dpLC = true;
+
+      leaderElector._dpL(); // message the lib user so the app can handle the problem
+
+
+      _sendMessage(leaderElector, 'tell'); // ensure other leader also knows the problem
+
+    }
+  };
+
+  leaderElector._channel.addEventListener('internal', isLeaderListener);
+
+  leaderElector._lstns.push(isLeaderListener);
+
+  return _sendMessage(leaderElector, 'tell');
+}
+
+function fillOptionsWithDefaults(options, channel) {
+  if (!options) options = {};
+  options = JSON.parse(JSON.stringify(options));
+
+  if (!options.fallbackInterval) {
+    options.fallbackInterval = 3000;
+  }
+
+  if (!options.responseTime) {
+    options.responseTime = channel.method.averageResponseTime(channel.options);
+  }
+
+  return options;
+}
+
+export function createLeaderElection(channel, options) {
+  if (channel._leaderElector) {
+    throw new Error('BroadcastChannel already has a leader-elector');
+  }
+
+  options = fillOptionsWithDefaults(options, channel);
+  var elector = new LeaderElection(channel, options);
+
+  channel._befC.push(function () {
+    return elector.die();
+  });
+
+  channel._leaderElector = elector;
+  return elector;
+}

server/node_modules/broadcast-channel/dist/es/method-chooser.js

@@ -0,0 +1,66 @@
+import NativeMethod from './methods/native.js';
+import IndexeDbMethod from './methods/indexed-db.js';
+import LocalstorageMethod from './methods/localstorage.js';
+import SimulateMethod from './methods/simulate.js';
+import { isNode } from './util'; // order is important
+
+var METHODS = [NativeMethod, // fastest
+IndexeDbMethod, LocalstorageMethod];
+/**
+ * The NodeMethod is loaded lazy
+ * so it will not get bundled in browser-builds
+ */
+
+if (isNode) {
+  /**
+   * we use the non-transpiled code for nodejs
+   * because it runs faster
+   */
+  var NodeMethod = require('../../src/methods/' + // use this hack so that browserify and others
+  // do not import the node-method by default
+  // when bundling.
+  'node.js');
+  /**
+   * this will be false for webpackbuilds
+   * which will shim the node-method with an empty object {}
+   */
+
+
+  if (typeof NodeMethod.canBeUsed === 'function') {
+    METHODS.push(NodeMethod);
+  }
+}
+
+export function chooseMethod(options) {
+  var chooseMethods = [].concat(options.methods, METHODS).filter(Boolean); // directly chosen
+
+  if (options.type) {
+    if (options.type === 'simulate') {
+      // only use simulate-method if directly chosen
+      return SimulateMethod;
+    }
+
+    var ret = chooseMethods.find(function (m) {
+      return m.type === options.type;
+    });
+    if (!ret) throw new Error('method-type ' + options.type + ' not found');else return ret;
+  }
+  /**
+   * if no webworker support is needed,
+   * remove idb from the list so that localstorage is been chosen
+   */
+
+
+  if (!options.webWorkerSupport && !isNode) {
+    chooseMethods = chooseMethods.filter(function (m) {
+      return m.type !== 'idb';
+    });
+  }
+
+  var useMethod = chooseMethods.find(function (method) {
+    return method.canBeUsed();
+  });
+  if (!useMethod) throw new Error('No useable methode found:' + JSON.stringify(METHODS.map(function (m) {
+    return m.type;
+  })));else return useMethod;
+}

server/node_modules/broadcast-channel/dist/es/methods/cookies.js

@@ -0,0 +1,4 @@
+/**
+ * if you really need this method,
+ * implement it
+ */

server/node_modules/broadcast-channel/dist/es/methods/indexed-db.js

@@ -0,0 +1,309 @@
+/**
+ * this method uses indexeddb to store the messages
+ * There is currently no observerAPI for idb
+ * @link https://github.com/w3c/IndexedDB/issues/51
+ */
+import { sleep, randomInt, randomToken, microSeconds as micro, isNode } from '../util.js';
+export var microSeconds = micro;
+import { ObliviousSet } from 'oblivious-set';
+import { fillOptionsWithDefaults } from '../options';
+var DB_PREFIX = 'pubkey.broadcast-channel-0-';
+var OBJECT_STORE_ID = 'messages';
+export var type = 'idb';
+export function getIdb() {
+  if (typeof indexedDB !== 'undefined') return indexedDB;
+
+  if (typeof window !== 'undefined') {
+    if (typeof window.mozIndexedDB !== 'undefined') return window.mozIndexedDB;
+    if (typeof window.webkitIndexedDB !== 'undefined') return window.webkitIndexedDB;
+    if (typeof window.msIndexedDB !== 'undefined') return window.msIndexedDB;
+  }
+
+  return false;
+}
+export function createDatabase(channelName) {
+  var IndexedDB = getIdb(); // create table
+
+  var dbName = DB_PREFIX + channelName;
+  var openRequest = IndexedDB.open(dbName, 1);
+
+  openRequest.onupgradeneeded = function (ev) {
+    var db = ev.target.result;
+    db.createObjectStore(OBJECT_STORE_ID, {
+      keyPath: 'id',
+      autoIncrement: true
+    });
+  };
+
+  var dbPromise = new Promise(function (res, rej) {
+    openRequest.onerror = function (ev) {
+      return rej(ev);
+    };
+
+    openRequest.onsuccess = function () {
+      res(openRequest.result);
+    };
+  });
+  return dbPromise;
+}
+/**
+ * writes the new message to the database
+ * so other readers can find it
+ */
+
+export function writeMessage(db, readerUuid, messageJson) {
+  var time = new Date().getTime();
+  var writeObject = {
+    uuid: readerUuid,
+    time: time,
+    data: messageJson
+  };
+  var transaction = db.transaction([OBJECT_STORE_ID], 'readwrite');
+  return new Promise(function (res, rej) {
+    transaction.oncomplete = function () {
+      return res();
+    };
+
+    transaction.onerror = function (ev) {
+      return rej(ev);
+    };
+
+    var objectStore = transaction.objectStore(OBJECT_STORE_ID);
+    objectStore.add(writeObject);
+  });
+}
+export function getAllMessages(db) {
+  var objectStore = db.transaction(OBJECT_STORE_ID).objectStore(OBJECT_STORE_ID);
+  var ret = [];
+  return new Promise(function (res) {
+    objectStore.openCursor().onsuccess = function (ev) {
+      var cursor = ev.target.result;
+
+      if (cursor) {
+        ret.push(cursor.value); //alert("Name for SSN " + cursor.key + " is " + cursor.value.name);
+
+        cursor["continue"]();
+      } else {
+        res(ret);
+      }
+    };
+  });
+}
+export function getMessagesHigherThan(db, lastCursorId) {
+  var objectStore = db.transaction(OBJECT_STORE_ID).objectStore(OBJECT_STORE_ID);
+  var ret = [];
+
+  function openCursor() {
+    // Occasionally Safari will fail on IDBKeyRange.bound, this
+    // catches that error, having it open the cursor to the first
+    // item. When it gets data it will advance to the desired key.
+    try {
+      var keyRangeValue = IDBKeyRange.bound(lastCursorId + 1, Infinity);
+      return objectStore.openCursor(keyRangeValue);
+    } catch (e) {
+      return objectStore.openCursor();
+    }
+  }
+
+  return new Promise(function (res) {
+    openCursor().onsuccess = function (ev) {
+      var cursor = ev.target.result;
+
+      if (cursor) {
+        if (cursor.value.id < lastCursorId + 1) {
+          cursor["continue"](lastCursorId + 1);
+        } else {
+          ret.push(cursor.value);
+          cursor["continue"]();
+        }
+      } else {
+        res(ret);
+      }
+    };
+  });
+}
+export function removeMessageById(db, id) {
+  var request = db.transaction([OBJECT_STORE_ID], 'readwrite').objectStore(OBJECT_STORE_ID)["delete"](id);
+  return new Promise(function (res) {
+    request.onsuccess = function () {
+      return res();
+    };
+  });
+}
+export function getOldMessages(db, ttl) {
+  var olderThen = new Date().getTime() - ttl;
+  var objectStore = db.transaction(OBJECT_STORE_ID).objectStore(OBJECT_STORE_ID);
+  var ret = [];
+  return new Promise(function (res) {
+    objectStore.openCursor().onsuccess = function (ev) {
+      var cursor = ev.target.result;
+
+      if (cursor) {
+        var msgObk = cursor.value;
+
+        if (msgObk.time < olderThen) {
+          ret.push(msgObk); //alert("Name for SSN " + cursor.key + " is " + cursor.value.name);
+
+          cursor["continue"]();
+        } else {
+          // no more old messages,
+          res(ret);
+          return;
+        }
+      } else {
+        res(ret);
+      }
+    };
+  });
+}
+export function cleanOldMessages(db, ttl) {
+  return getOldMessages(db, ttl).then(function (tooOld) {
+    return Promise.all(tooOld.map(function (msgObj) {
+      return removeMessageById(db, msgObj.id);
+    }));
+  });
+}
+export function create(channelName, options) {
+  options = fillOptionsWithDefaults(options);
+  return createDatabase(channelName).then(function (db) {
+    var state = {
+      closed: false,
+      lastCursorId: 0,
+      channelName: channelName,
+      options: options,
+      uuid: randomToken(),
+
+      /**
+       * emittedMessagesIds
+       * contains all messages that have been emitted before
+       * @type {ObliviousSet}
+       */
+      eMIs: new ObliviousSet(options.idb.ttl * 2),
+      // ensures we do not read messages in parrallel
+      writeBlockPromise: Promise.resolve(),
+      messagesCallback: null,
+      readQueuePromises: [],
+      db: db
+    };
+    /**
+     * Handle abrupt closes that do not originate from db.close().
+     * This could happen, for example, if the underlying storage is
+     * removed or if the user clears the database in the browser's
+     * history preferences.
+     */
+
+    db.onclose = function () {
+      state.closed = true;
+      if (options.idb.onclose) options.idb.onclose();
+    };
+    /**
+     * if service-workers are used,
+     * we have no 'storage'-event if they post a message,
+     * therefore we also have to set an interval
+     */
+
+
+    _readLoop(state);
+
+    return state;
+  });
+}
+
+function _readLoop(state) {
+  if (state.closed) return;
+  readNewMessages(state).then(function () {
+    return sleep(state.options.idb.fallbackInterval);
+  }).then(function () {
+    return _readLoop(state);
+  });
+}
+
+function _filterMessage(msgObj, state) {
+  if (msgObj.uuid === state.uuid) return false; // send by own
+
+  if (state.eMIs.has(msgObj.id)) return false; // already emitted
+
+  if (msgObj.data.time < state.messagesCallbackTime) return false; // older then onMessageCallback
+
+  return true;
+}
+/**
+ * reads all new messages from the database and emits them
+ */
+
+
+function readNewMessages(state) {
+  // channel already closed
+  if (state.closed) return Promise.resolve(); // if no one is listening, we do not need to scan for new messages
+
+  if (!state.messagesCallback) return Promise.resolve();
+  return getMessagesHigherThan(state.db, state.lastCursorId).then(function (newerMessages) {
+    var useMessages = newerMessages
+    /**
+     * there is a bug in iOS where the msgObj can be undefined some times
+     * so we filter them out
+     * @link https://github.com/pubkey/broadcast-channel/issues/19
+     */
+    .filter(function (msgObj) {
+      return !!msgObj;
+    }).map(function (msgObj) {
+      if (msgObj.id > state.lastCursorId) {
+        state.lastCursorId = msgObj.id;
+      }
+
+      return msgObj;
+    }).filter(function (msgObj) {
+      return _filterMessage(msgObj, state);
+    }).sort(function (msgObjA, msgObjB) {
+      return msgObjA.time - msgObjB.time;
+    }); // sort by time
+
+    useMessages.forEach(function (msgObj) {
+      if (state.messagesCallback) {
+        state.eMIs.add(msgObj.id);
+        state.messagesCallback(msgObj.data);
+      }
+    });
+    return Promise.resolve();
+  });
+}
+
+export function close(channelState) {
+  channelState.closed = true;
+  channelState.db.close();
+}
+export function postMessage(channelState, messageJson) {
+  channelState.writeBlockPromise = channelState.writeBlockPromise.then(function () {
+    return writeMessage(channelState.db, channelState.uuid, messageJson);
+  }).then(function () {
+    if (randomInt(0, 10) === 0) {
+      /* await (do not await) */
+      cleanOldMessages(channelState.db, channelState.options.idb.ttl);
+    }
+  });
+  return channelState.writeBlockPromise;
+}
+export function onMessage(channelState, fn, time) {
+  channelState.messagesCallbackTime = time;
+  channelState.messagesCallback = fn;
+  readNewMessages(channelState);
+}
+export function canBeUsed() {
+  if (isNode) return false;
+  var idb = getIdb();
+  if (!idb) return false;
+  return true;
+}
+export function averageResponseTime(options) {
+  return options.idb.fallbackInterval * 2;
+}
+export default {
+  create: create,
+  close: close,
+  onMessage: onMessage,
+  postMessage: postMessage,
+  canBeUsed: canBeUsed,
+  type: type,
+  averageResponseTime: averageResponseTime,
+  microSeconds: microSeconds
+};

server/node_modules/broadcast-channel/dist/es/methods/localstorage.js

@@ -0,0 +1,163 @@
+/**
+ * A localStorage-only method which uses localstorage and its 'storage'-event
+ * This does not work inside of webworkers because they have no access to locastorage
+ * This is basically implemented to support IE9 or your grandmothers toaster.
+ * @link https://caniuse.com/#feat=namevalue-storage
+ * @link https://caniuse.com/#feat=indexeddb
+ */
+import { ObliviousSet } from 'oblivious-set';
+import { fillOptionsWithDefaults } from '../options';
+import { sleep, randomToken, microSeconds as micro, isNode } from '../util';
+export var microSeconds = micro;
+var KEY_PREFIX = 'pubkey.broadcastChannel-';
+export var type = 'localstorage';
+/**
+ * copied from crosstab
+ * @link https://github.com/tejacques/crosstab/blob/master/src/crosstab.js#L32
+ */
+
+export function getLocalStorage() {
+  var localStorage;
+  if (typeof window === 'undefined') return null;
+
+  try {
+    localStorage = window.localStorage;
+    localStorage = window['ie8-eventlistener/storage'] || window.localStorage;
+  } catch (e) {// New versions of Firefox throw a Security exception
+    // if cookies are disabled. See
+    // https://bugzilla.mozilla.org/show_bug.cgi?id=1028153
+  }
+
+  return localStorage;
+}
+export function storageKey(channelName) {
+  return KEY_PREFIX + channelName;
+}
+/**
+* writes the new message to the storage
+* and fires the storage-event so other readers can find it
+*/
+
+export function postMessage(channelState, messageJson) {
+  return new Promise(function (res) {
+    sleep().then(function () {
+      var key = storageKey(channelState.channelName);
+      var writeObj = {
+        token: randomToken(),
+        time: new Date().getTime(),
+        data: messageJson,
+        uuid: channelState.uuid
+      };
+      var value = JSON.stringify(writeObj);
+      getLocalStorage().setItem(key, value);
+      /**
+       * StorageEvent does not fire the 'storage' event
+       * in the window that changes the state of the local storage.
+       * So we fire it manually
+       */
+
+      var ev = document.createEvent('Event');
+      ev.initEvent('storage', true, true);
+      ev.key = key;
+      ev.newValue = value;
+      window.dispatchEvent(ev);
+      res();
+    });
+  });
+}
+export function addStorageEventListener(channelName, fn) {
+  var key = storageKey(channelName);
+
+  var listener = function listener(ev) {
+    if (ev.key === key) {
+      fn(JSON.parse(ev.newValue));
+    }
+  };
+
+  window.addEventListener('storage', listener);
+  return listener;
+}
+export function removeStorageEventListener(listener) {
+  window.removeEventListener('storage', listener);
+}
+export function create(channelName, options) {
+  options = fillOptionsWithDefaults(options);
+
+  if (!canBeUsed()) {
+    throw new Error('BroadcastChannel: localstorage cannot be used');
+  }
+
+  var uuid = randomToken();
+  /**
+   * eMIs
+   * contains all messages that have been emitted before
+   * @type {ObliviousSet}
+   */
+
+  var eMIs = new ObliviousSet(options.localstorage.removeTimeout);
+  var state = {
+    channelName: channelName,
+    uuid: uuid,
+    eMIs: eMIs // emittedMessagesIds
+
+  };
+  state.listener = addStorageEventListener(channelName, function (msgObj) {
+    if (!state.messagesCallback) return; // no listener
+
+    if (msgObj.uuid === uuid) return; // own message
+
+    if (!msgObj.token || eMIs.has(msgObj.token)) return; // already emitted
+
+    if (msgObj.data.time && msgObj.data.time < state.messagesCallbackTime) return; // too old
+
+    eMIs.add(msgObj.token);
+    state.messagesCallback(msgObj.data);
+  });
+  return state;
+}
+export function close(channelState) {
+  removeStorageEventListener(channelState.listener);
+}
+export function onMessage(channelState, fn, time) {
+  channelState.messagesCallbackTime = time;
+  channelState.messagesCallback = fn;
+}
+export function canBeUsed() {
+  if (isNode) return false;
+  var ls = getLocalStorage();
+  if (!ls) return false;
+
+  try {
+    var key = '__broadcastchannel_check';
+    ls.setItem(key, 'works');
+    ls.removeItem(key);
+  } catch (e) {
+    // Safari 10 in private mode will not allow write access to local
+    // storage and fail with a QuotaExceededError. See
+    // https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API#Private_Browsing_Incognito_modes
+    return false;
+  }
+
+  return true;
+}
+export function averageResponseTime() {
+  var defaultTime = 120;
+  var userAgent = navigator.userAgent.toLowerCase();
+
+  if (userAgent.includes('safari') && !userAgent.includes('chrome')) {
+    // safari is much slower so this time is higher
+    return defaultTime * 2;
+  }
+
+  return defaultTime;
+}
+export default {
+  create: create,
+  close: close,
+  onMessage: onMessage,
+  postMessage: postMessage,
+  canBeUsed: canBeUsed,
+  type: type,
+  averageResponseTime: averageResponseTime,
+  microSeconds: microSeconds
+};

server/node_modules/broadcast-channel/dist/es/methods/native.js

@@ -0,0 +1,62 @@
+import { microSeconds as micro, isNode } from '../util';
+export var microSeconds = micro;
+export var type = 'native';
+export function create(channelName) {
+  var state = {
+    messagesCallback: null,
+    bc: new BroadcastChannel(channelName),
+    subFns: [] // subscriberFunctions
+
+  };
+
+  state.bc.onmessage = function (msg) {
+    if (state.messagesCallback) {
+      state.messagesCallback(msg.data);
+    }
+  };
+
+  return state;
+}
+export function close(channelState) {
+  channelState.bc.close();
+  channelState.subFns = [];
+}
+export function postMessage(channelState, messageJson) {
+  try {
+    channelState.bc.postMessage(messageJson, false);
+    return Promise.resolve();
+  } catch (err) {
+    return Promise.reject(err);
+  }
+}
+export function onMessage(channelState, fn) {
+  channelState.messagesCallback = fn;
+}
+export function canBeUsed() {
+  /**
+   * in the electron-renderer, isNode will be true even if we are in browser-context
+   * so we also check if window is undefined
+   */
+  if (isNode && typeof window === 'undefined') return false;
+
+  if (typeof BroadcastChannel === 'function') {
+    if (BroadcastChannel._pubkey) {
+      throw new Error('BroadcastChannel: Do not overwrite window.BroadcastChannel with this module, this is not a polyfill');
+    }
+
+    return true;
+  } else return false;
+}
+export function averageResponseTime() {
+  return 150;
+}
+export default {
+  create: create,
+  close: close,
+  onMessage: onMessage,
+  postMessage: postMessage,
+  canBeUsed: canBeUsed,
+  type: type,
+  averageResponseTime: averageResponseTime,
+  microSeconds: microSeconds
+};

server/node_modules/broadcast-channel/dist/es/methods/simulate.js

@@ -0,0 +1,51 @@
+import { microSeconds as micro } from '../util';
+export var microSeconds = micro;
+export var type = 'simulate';
+var SIMULATE_CHANNELS = new Set();
+export function create(channelName) {
+  var state = {
+    name: channelName,
+    messagesCallback: null
+  };
+  SIMULATE_CHANNELS.add(state);
+  return state;
+}
+export function close(channelState) {
+  SIMULATE_CHANNELS["delete"](channelState);
+}
+export function postMessage(channelState, messageJson) {
+  return new Promise(function (res) {
+    return setTimeout(function () {
+      var channelArray = Array.from(SIMULATE_CHANNELS);
+      channelArray.filter(function (channel) {
+        return channel.name === channelState.name;
+      }).filter(function (channel) {
+        return channel !== channelState;
+      }).filter(function (channel) {
+        return !!channel.messagesCallback;
+      }).forEach(function (channel) {
+        return channel.messagesCallback(messageJson);
+      });
+      res();
+    }, 5);
+  });
+}
+export function onMessage(channelState, fn) {
+  channelState.messagesCallback = fn;
+}
+export function canBeUsed() {
+  return true;
+}
+export function averageResponseTime() {
+  return 5;
+}
+export default {
+  create: create,
+  close: close,
+  onMessage: onMessage,
+  postMessage: postMessage,
+  canBeUsed: canBeUsed,
+  type: type,
+  averageResponseTime: averageResponseTime,
+  microSeconds: microSeconds
+};

server/node_modules/broadcast-channel/dist/es/options.js

@@ -0,0 +1,24 @@
+export function fillOptionsWithDefaults() {
+  var originalOptions = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
+  var options = JSON.parse(JSON.stringify(originalOptions)); // main
+
+  if (typeof options.webWorkerSupport === 'undefined') options.webWorkerSupport = true; // indexed-db
+
+  if (!options.idb) options.idb = {}; //  after this time the messages get deleted
+
+  if (!options.idb.ttl) options.idb.ttl = 1000 * 45;
+  if (!options.idb.fallbackInterval) options.idb.fallbackInterval = 150; //  handles abrupt db onclose events.
+
+  if (originalOptions.idb && typeof originalOptions.idb.onclose === 'function') options.idb.onclose = originalOptions.idb.onclose; // localstorage
+
+  if (!options.localstorage) options.localstorage = {};
+  if (!options.localstorage.removeTimeout) options.localstorage.removeTimeout = 1000 * 60; // custom methods
+
+  if (originalOptions.methods) options.methods = originalOptions.methods; // node
+
+  if (!options.node) options.node = {};
+  if (!options.node.ttl) options.node.ttl = 1000 * 60 * 2; // 2 minutes;
+
+  if (typeof options.node.useFastPath === 'undefined') options.node.useFastPath = true;
+  return options;
+}

server/node_modules/broadcast-channel/dist/es/util.js

@@ -0,0 +1,55 @@
+/**
+ * returns true if the given object is a promise
+ */
+export function isPromise(obj) {
+  if (obj && typeof obj.then === 'function') {
+    return true;
+  } else {
+    return false;
+  }
+}
+export function sleep(time) {
+  if (!time) time = 0;
+  return new Promise(function (res) {
+    return setTimeout(res, time);
+  });
+}
+export function randomInt(min, max) {
+  return Math.floor(Math.random() * (max - min + 1) + min);
+}
+/**
+ * https://stackoverflow.com/a/8084248
+ */
+
+export function randomToken() {
+  return Math.random().toString(36).substring(2);
+}
+var lastMs = 0;
+var additional = 0;
+/**
+ * returns the current time in micro-seconds,
+ * WARNING: This is a pseudo-function
+ * Performance.now is not reliable in webworkers, so we just make sure to never return the same time.
+ * This is enough in browsers, and this function will not be used in nodejs.
+ * The main reason for this hack is to ensure that BroadcastChannel behaves equal to production when it is used in fast-running unit tests.
+ */
+
+export function microSeconds() {
+  var ms = new Date().getTime();
+
+  if (ms === lastMs) {
+    additional++;
+    return ms * 1000 + additional;
+  } else {
+    lastMs = ms;
+    additional = 0;
+    return ms * 1000;
+  }
+}
+/**
+ * copied from the 'detect-node' npm module
+ * We cannot use the module directly because it causes problems with rollup
+ * @link https://github.com/iliakan/detect-node/blob/master/index.js
+ */
+
+export var isNode = Object.prototype.toString.call(typeof process !== 'undefined' ? process : 0) === '[object process]';

server/node_modules/broadcast-channel/dist/lib/broadcast-channel.js

@@ -0,0 +1,279 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.clearNodeFolder = clearNodeFolder;
+exports.enforceOptions = enforceOptions;
+exports.BroadcastChannel = void 0;
+
+var _util = require("./util.js");
+
+var _methodChooser = require("./method-chooser.js");
+
+var _options = require("./options.js");
+
+var BroadcastChannel = function BroadcastChannel(name, options) {
+  this.name = name;
+
+  if (ENFORCED_OPTIONS) {
+    options = ENFORCED_OPTIONS;
+  }
+
+  this.options = (0, _options.fillOptionsWithDefaults)(options);
+  this.method = (0, _methodChooser.chooseMethod)(this.options); // isListening
+
+  this._iL = false;
+  /**
+   * _onMessageListener
+   * setting onmessage twice,
+   * will overwrite the first listener
+   */
+
+  this._onML = null;
+  /**
+   * _addEventListeners
+   */
+
+  this._addEL = {
+    message: [],
+    internal: []
+  };
+  /**
+   * Unsend message promises
+   * where the sending is still in progress
+   * @type {Set<Promise>}
+   */
+
+  this._uMP = new Set();
+  /**
+   * _beforeClose
+   * array of promises that will be awaited
+   * before the channel is closed
+   */
+
+  this._befC = [];
+  /**
+   * _preparePromise
+   */
+
+  this._prepP = null;
+
+  _prepareChannel(this);
+}; // STATICS
+
+/**
+ * used to identify if someone overwrites
+ * window.BroadcastChannel with this
+ * See methods/native.js
+ */
+
+
+exports.BroadcastChannel = BroadcastChannel;
+BroadcastChannel._pubkey = true;
+/**
+ * clears the tmp-folder if is node
+ * @return {Promise<boolean>} true if has run, false if not node
+ */
+
+function clearNodeFolder(options) {
+  options = (0, _options.fillOptionsWithDefaults)(options);
+  var method = (0, _methodChooser.chooseMethod)(options);
+
+  if (method.type === 'node') {
+    return method.clearNodeFolder().then(function () {
+      return true;
+    });
+  } else {
+    return Promise.resolve(false);
+  }
+}
+/**
+ * if set, this method is enforced,
+ * no mather what the options are
+ */
+
+
+var ENFORCED_OPTIONS;
+
+function enforceOptions(options) {
+  ENFORCED_OPTIONS = options;
+} // PROTOTYPE
+
+
+BroadcastChannel.prototype = {
+  postMessage: function postMessage(msg) {
+    if (this.closed) {
+      throw new Error('BroadcastChannel.postMessage(): ' + 'Cannot post message after channel has closed');
+    }
+
+    return _post(this, 'message', msg);
+  },
+  postInternal: function postInternal(msg) {
+    return _post(this, 'internal', msg);
+  },
+
+  set onmessage(fn) {
+    var time = this.method.microSeconds();
+    var listenObj = {
+      time: time,
+      fn: fn
+    };
+
+    _removeListenerObject(this, 'message', this._onML);
+
+    if (fn && typeof fn === 'function') {
+      this._onML = listenObj;
+
+      _addListenerObject(this, 'message', listenObj);
+    } else {
+      this._onML = null;
+    }
+  },
+
+  addEventListener: function addEventListener(type, fn) {
+    var time = this.method.microSeconds();
+    var listenObj = {
+      time: time,
+      fn: fn
+    };
+
+    _addListenerObject(this, type, listenObj);
+  },
+  removeEventListener: function removeEventListener(type, fn) {
+    var obj = this._addEL[type].find(function (obj) {
+      return obj.fn === fn;
+    });
+
+    _removeListenerObject(this, type, obj);
+  },
+  close: function close() {
+    var _this = this;
+
+    if (this.closed) {
+      return;
+    }
+
+    this.closed = true;
+    var awaitPrepare = this._prepP ? this._prepP : Promise.resolve();
+    this._onML = null;
+    this._addEL.message = [];
+    return awaitPrepare // wait until all current sending are processed
+    .then(function () {
+      return Promise.all(Array.from(_this._uMP));
+    }) // run before-close hooks
+    .then(function () {
+      return Promise.all(_this._befC.map(function (fn) {
+        return fn();
+      }));
+    }) // close the channel
+    .then(function () {
+      return _this.method.close(_this._state);
+    });
+  },
+
+  get type() {
+    return this.method.type;
+  },
+
+  get isClosed() {
+    return this.closed;
+  }
+
+};
+/**
+ * Post a message over the channel
+ * @returns {Promise} that resolved when the message sending is done
+ */
+
+function _post(broadcastChannel, type, msg) {
+  var time = broadcastChannel.method.microSeconds();
+  var msgObj = {
+    time: time,
+    type: type,
+    data: msg
+  };
+  var awaitPrepare = broadcastChannel._prepP ? broadcastChannel._prepP : Promise.resolve();
+  return awaitPrepare.then(function () {
+    var sendPromise = broadcastChannel.method.postMessage(broadcastChannel._state, msgObj); // add/remove to unsend messages list
+
+    broadcastChannel._uMP.add(sendPromise);
+
+    sendPromise["catch"]().then(function () {
+      return broadcastChannel._uMP["delete"](sendPromise);
+    });
+    return sendPromise;
+  });
+}
+
+function _prepareChannel(channel) {
+  var maybePromise = channel.method.create(channel.name, channel.options);
+
+  if ((0, _util.isPromise)(maybePromise)) {
+    channel._prepP = maybePromise;
+    maybePromise.then(function (s) {
+      // used in tests to simulate slow runtime
+
+      /*if (channel.options.prepareDelay) {
+           await new Promise(res => setTimeout(res, this.options.prepareDelay));
+      }*/
+      channel._state = s;
+    });
+  } else {
+    channel._state = maybePromise;
+  }
+}
+
+function _hasMessageListeners(channel) {
+  if (channel._addEL.message.length > 0) return true;
+  if (channel._addEL.internal.length > 0) return true;
+  return false;
+}
+
+function _addListenerObject(channel, type, obj) {
+  channel._addEL[type].push(obj);
+
+  _startListening(channel);
+}
+
+function _removeListenerObject(channel, type, obj) {
+  channel._addEL[type] = channel._addEL[type].filter(function (o) {
+    return o !== obj;
+  });
+
+  _stopListening(channel);
+}
+
+function _startListening(channel) {
+  if (!channel._iL && _hasMessageListeners(channel)) {
+    // someone is listening, start subscribing
+    var listenerFn = function listenerFn(msgObj) {
+      channel._addEL[msgObj.type].forEach(function (obj) {
+        if (msgObj.time >= obj.time) {
+          obj.fn(msgObj.data);
+        }
+      });
+    };
+
+    var time = channel.method.microSeconds();
+
+    if (channel._prepP) {
+      channel._prepP.then(function () {
+        channel._iL = true;
+        channel.method.onMessage(channel._state, listenerFn, time);
+      });
+    } else {
+      channel._iL = true;
+      channel.method.onMessage(channel._state, listenerFn, time);
+    }
+  }
+}
+
+function _stopListening(channel) {
+  if (channel._iL && !_hasMessageListeners(channel)) {
+    // noone is listening, stop subscribing
+    channel._iL = false;
+    var time = channel.method.microSeconds();
+    channel.method.onMessage(channel._state, null, time);
+  }
+}

server/node_modules/broadcast-channel/dist/lib/browserify.index.js

@@ -0,0 +1,8 @@
+"use strict";
+
+var _module = require('./index.es5.js');
+
+var BroadcastChannel = _module.BroadcastChannel;
+var createLeaderElection = _module.createLeaderElection;
+window['BroadcastChannel2'] = BroadcastChannel;
+window['createLeaderElection'] = createLeaderElection;

server/node_modules/broadcast-channel/dist/lib/index.es5.js

@@ -0,0 +1,19 @@
+"use strict";
+
+var _index = require("./index.js");
+
+/**
+ * because babel can only export on default-attribute,
+ * we use this for the non-module-build
+ * this ensures that users do not have to use
+ * var BroadcastChannel = require('broadcast-channel').default;
+ * but
+ * var BroadcastChannel = require('broadcast-channel');
+ */
+module.exports = {
+  BroadcastChannel: _index.BroadcastChannel,
+  createLeaderElection: _index.createLeaderElection,
+  clearNodeFolder: _index.clearNodeFolder,
+  enforceOptions: _index.enforceOptions,
+  beLeader: _index.beLeader
+};

server/node_modules/broadcast-channel/dist/lib/index.js

@@ -0,0 +1,39 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+Object.defineProperty(exports, "BroadcastChannel", {
+  enumerable: true,
+  get: function get() {
+    return _broadcastChannel.BroadcastChannel;
+  }
+});
+Object.defineProperty(exports, "clearNodeFolder", {
+  enumerable: true,
+  get: function get() {
+    return _broadcastChannel.clearNodeFolder;
+  }
+});
+Object.defineProperty(exports, "enforceOptions", {
+  enumerable: true,
+  get: function get() {
+    return _broadcastChannel.enforceOptions;
+  }
+});
+Object.defineProperty(exports, "createLeaderElection", {
+  enumerable: true,
+  get: function get() {
+    return _leaderElection.createLeaderElection;
+  }
+});
+Object.defineProperty(exports, "beLeader", {
+  enumerable: true,
+  get: function get() {
+    return _leaderElection.beLeader;
+  }
+});
+
+var _broadcastChannel = require("./broadcast-channel");
+
+var _leaderElection = require("./leader-election");

server/node_modules/broadcast-channel/dist/lib/leader-election.js

@@ -0,0 +1,274 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.beLeader = beLeader;
+exports.createLeaderElection = createLeaderElection;
+
+var _util = require("./util.js");
+
+var _unload = _interopRequireDefault(require("unload"));
+
+var LeaderElection = function LeaderElection(channel, options) {
+  this._channel = channel;
+  this._options = options;
+  this.isLeader = false;
+  this.isDead = false;
+  this.token = (0, _util.randomToken)();
+  this._isApl = false; // _isApplying
+
+  this._reApply = false; // things to clean up
+
+  this._unl = []; // _unloads
+
+  this._lstns = []; // _listeners
+
+  this._invs = []; // _intervals
+
+  this._dpL = function () {}; // onduplicate listener
+
+
+  this._dpLC = false; // true when onduplicate called
+};
+
+LeaderElection.prototype = {
+  applyOnce: function applyOnce() {
+    var _this = this;
+
+    if (this.isLeader) return Promise.resolve(false);
+    if (this.isDead) return Promise.resolve(false); // do nothing if already running
+
+    if (this._isApl) {
+      this._reApply = true;
+      return Promise.resolve(false);
+    }
+
+    this._isApl = true;
+    var stopCriteria = false;
+    var recieved = [];
+
+    var handleMessage = function handleMessage(msg) {
+      if (msg.context === 'leader' && msg.token != _this.token) {
+        recieved.push(msg);
+
+        if (msg.action === 'apply') {
+          // other is applying
+          if (msg.token > _this.token) {
+            // other has higher token, stop applying
+            stopCriteria = true;
+          }
+        }
+
+        if (msg.action === 'tell') {
+          // other is already leader
+          stopCriteria = true;
+        }
+      }
+    };
+
+    this._channel.addEventListener('internal', handleMessage);
+
+    var ret = _sendMessage(this, 'apply') // send out that this one is applying
+    .then(function () {
+      return (0, _util.sleep)(_this._options.responseTime);
+    }) // let others time to respond
+    .then(function () {
+      if (stopCriteria) return Promise.reject(new Error());else return _sendMessage(_this, 'apply');
+    }).then(function () {
+      return (0, _util.sleep)(_this._options.responseTime);
+    }) // let others time to respond
+    .then(function () {
+      if (stopCriteria) return Promise.reject(new Error());else return _sendMessage(_this);
+    }).then(function () {
+      return beLeader(_this);
+    }) // no one disagreed -> this one is now leader
+    .then(function () {
+      return true;
+    })["catch"](function () {
+      return false;
+    }) // apply not successfull
+    .then(function (success) {
+      _this._channel.removeEventListener('internal', handleMessage);
+
+      _this._isApl = false;
+
+      if (!success && _this._reApply) {
+        _this._reApply = false;
+        return _this.applyOnce();
+      } else return success;
+    });
+
+    return ret;
+  },
+  awaitLeadership: function awaitLeadership() {
+    if (
+    /* _awaitLeadershipPromise */
+    !this._aLP) {
+      this._aLP = _awaitLeadershipOnce(this);
+    }
+
+    return this._aLP;
+  },
+
+  set onduplicate(fn) {
+    this._dpL = fn;
+  },
+
+  die: function die() {
+    var _this2 = this;
+
+    if (this.isDead) return;
+    this.isDead = true;
+
+    this._lstns.forEach(function (listener) {
+      return _this2._channel.removeEventListener('internal', listener);
+    });
+
+    this._invs.forEach(function (interval) {
+      return clearInterval(interval);
+    });
+
+    this._unl.forEach(function (uFn) {
+      uFn.remove();
+    });
+
+    return _sendMessage(this, 'death');
+  }
+};
+
+function _awaitLeadershipOnce(leaderElector) {
+  if (leaderElector.isLeader) return Promise.resolve();
+  return new Promise(function (res) {
+    var resolved = false;
+
+    function finish() {
+      if (resolved) {
+        return;
+      }
+
+      resolved = true;
+      clearInterval(interval);
+
+      leaderElector._channel.removeEventListener('internal', whenDeathListener);
+
+      res(true);
+    } // try once now
+
+
+    leaderElector.applyOnce().then(function () {
+      if (leaderElector.isLeader) {
+        finish();
+      }
+    }); // try on fallbackInterval
+
+    var interval = setInterval(function () {
+      leaderElector.applyOnce().then(function () {
+        if (leaderElector.isLeader) {
+          finish();
+        }
+      });
+    }, leaderElector._options.fallbackInterval);
+
+    leaderElector._invs.push(interval); // try when other leader dies
+
+
+    var whenDeathListener = function whenDeathListener(msg) {
+      if (msg.context === 'leader' && msg.action === 'death') {
+        leaderElector.applyOnce().then(function () {
+          if (leaderElector.isLeader) finish();
+        });
+      }
+    };
+
+    leaderElector._channel.addEventListener('internal', whenDeathListener);
+
+    leaderElector._lstns.push(whenDeathListener);
+  });
+}
+/**
+ * sends and internal message over the broadcast-channel
+ */
+
+
+function _sendMessage(leaderElector, action) {
+  var msgJson = {
+    context: 'leader',
+    action: action,
+    token: leaderElector.token
+  };
+  return leaderElector._channel.postInternal(msgJson);
+}
+
+function beLeader(leaderElector) {
+  leaderElector.isLeader = true;
+
+  var unloadFn = _unload["default"].add(function () {
+    return leaderElector.die();
+  });
+
+  leaderElector._unl.push(unloadFn);
+
+  var isLeaderListener = function isLeaderListener(msg) {
+    if (msg.context === 'leader' && msg.action === 'apply') {
+      _sendMessage(leaderElector, 'tell');
+    }
+
+    if (msg.context === 'leader' && msg.action === 'tell' && !leaderElector._dpLC) {
+      /**
+       * another instance is also leader!
+       * This can happen on rare events
+       * like when the CPU is at 100% for long time
+       * or the tabs are open very long and the browser throttles them.
+       * @link https://github.com/pubkey/broadcast-channel/issues/414
+       * @link https://github.com/pubkey/broadcast-channel/issues/385
+       */
+      leaderElector._dpLC = true;
+
+      leaderElector._dpL(); // message the lib user so the app can handle the problem
+
+
+      _sendMessage(leaderElector, 'tell'); // ensure other leader also knows the problem
+
+    }
+  };
+
+  leaderElector._channel.addEventListener('internal', isLeaderListener);
+
+  leaderElector._lstns.push(isLeaderListener);
+
+  return _sendMessage(leaderElector, 'tell');
+}
+
+function fillOptionsWithDefaults(options, channel) {
+  if (!options) options = {};
+  options = JSON.parse(JSON.stringify(options));
+
+  if (!options.fallbackInterval) {
+    options.fallbackInterval = 3000;
+  }
+
+  if (!options.responseTime) {
+    options.responseTime = channel.method.averageResponseTime(channel.options);
+  }
+
+  return options;
+}
+
+function createLeaderElection(channel, options) {
+  if (channel._leaderElector) {
+    throw new Error('BroadcastChannel already has a leader-elector');
+  }
+
+  options = fillOptionsWithDefaults(options, channel);
+  var elector = new LeaderElection(channel, options);
+
+  channel._befC.push(function () {
+    return elector.die();
+  });
+
+  channel._leaderElector = elector;
+  return elector;
+}

server/node_modules/broadcast-channel/dist/lib/method-chooser.js

@@ -0,0 +1,80 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.chooseMethod = chooseMethod;
+
+var _native = _interopRequireDefault(require("./methods/native.js"));
+
+var _indexedDb = _interopRequireDefault(require("./methods/indexed-db.js"));
+
+var _localstorage = _interopRequireDefault(require("./methods/localstorage.js"));
+
+var _simulate = _interopRequireDefault(require("./methods/simulate.js"));
+
+var _util = require("./util");
+
+// order is important
+var METHODS = [_native["default"], // fastest
+_indexedDb["default"], _localstorage["default"]];
+/**
+ * The NodeMethod is loaded lazy
+ * so it will not get bundled in browser-builds
+ */
+
+if (_util.isNode) {
+  /**
+   * we use the non-transpiled code for nodejs
+   * because it runs faster
+   */
+  var NodeMethod = require('../../src/methods/' + // use this hack so that browserify and others
+  // do not import the node-method by default
+  // when bundling.
+  'node.js');
+  /**
+   * this will be false for webpackbuilds
+   * which will shim the node-method with an empty object {}
+   */
+
+
+  if (typeof NodeMethod.canBeUsed === 'function') {
+    METHODS.push(NodeMethod);
+  }
+}
+
+function chooseMethod(options) {
+  var chooseMethods = [].concat(options.methods, METHODS).filter(Boolean); // directly chosen
+
+  if (options.type) {
+    if (options.type === 'simulate') {
+      // only use simulate-method if directly chosen
+      return _simulate["default"];
+    }
+
+    var ret = chooseMethods.find(function (m) {
+      return m.type === options.type;
+    });
+    if (!ret) throw new Error('method-type ' + options.type + ' not found');else return ret;
+  }
+  /**
+   * if no webworker support is needed,
+   * remove idb from the list so that localstorage is been chosen
+   */
+
+
+  if (!options.webWorkerSupport && !_util.isNode) {
+    chooseMethods = chooseMethods.filter(function (m) {
+      return m.type !== 'idb';
+    });
+  }
+
+  var useMethod = chooseMethods.find(function (method) {
+    return method.canBeUsed();
+  });
+  if (!useMethod) throw new Error('No useable methode found:' + JSON.stringify(METHODS.map(function (m) {
+    return m.type;
+  })));else return useMethod;
+}

server/node_modules/broadcast-channel/dist/lib/methods/cookies.js

@@ -0,0 +1,5 @@
+/**
+ * if you really need this method,
+ * implement it
+ */
+"use strict";

server/node_modules/broadcast-channel/dist/lib/methods/indexed-db.js

@@ -0,0 +1,350 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.getIdb = getIdb;
+exports.createDatabase = createDatabase;
+exports.writeMessage = writeMessage;
+exports.getAllMessages = getAllMessages;
+exports.getMessagesHigherThan = getMessagesHigherThan;
+exports.removeMessageById = removeMessageById;
+exports.getOldMessages = getOldMessages;
+exports.cleanOldMessages = cleanOldMessages;
+exports.create = create;
+exports.close = close;
+exports.postMessage = postMessage;
+exports.onMessage = onMessage;
+exports.canBeUsed = canBeUsed;
+exports.averageResponseTime = averageResponseTime;
+exports["default"] = exports.type = exports.microSeconds = void 0;
+
+var _util = require("../util.js");
+
+var _obliviousSet = require("oblivious-set");
+
+var _options = require("../options");
+
+/**
+ * this method uses indexeddb to store the messages
+ * There is currently no observerAPI for idb
+ * @link https://github.com/w3c/IndexedDB/issues/51
+ */
+var microSeconds = _util.microSeconds;
+exports.microSeconds = microSeconds;
+var DB_PREFIX = 'pubkey.broadcast-channel-0-';
+var OBJECT_STORE_ID = 'messages';
+var type = 'idb';
+exports.type = type;
+
+function getIdb() {
+  if (typeof indexedDB !== 'undefined') return indexedDB;
+
+  if (typeof window !== 'undefined') {
+    if (typeof window.mozIndexedDB !== 'undefined') return window.mozIndexedDB;
+    if (typeof window.webkitIndexedDB !== 'undefined') return window.webkitIndexedDB;
+    if (typeof window.msIndexedDB !== 'undefined') return window.msIndexedDB;
+  }
+
+  return false;
+}
+
+function createDatabase(channelName) {
+  var IndexedDB = getIdb(); // create table
+
+  var dbName = DB_PREFIX + channelName;
+  var openRequest = IndexedDB.open(dbName, 1);
+
+  openRequest.onupgradeneeded = function (ev) {
+    var db = ev.target.result;
+    db.createObjectStore(OBJECT_STORE_ID, {
+      keyPath: 'id',
+      autoIncrement: true
+    });
+  };
+
+  var dbPromise = new Promise(function (res, rej) {
+    openRequest.onerror = function (ev) {
+      return rej(ev);
+    };
+
+    openRequest.onsuccess = function () {
+      res(openRequest.result);
+    };
+  });
+  return dbPromise;
+}
+/**
+ * writes the new message to the database
+ * so other readers can find it
+ */
+
+
+function writeMessage(db, readerUuid, messageJson) {
+  var time = new Date().getTime();
+  var writeObject = {
+    uuid: readerUuid,
+    time: time,
+    data: messageJson
+  };
+  var transaction = db.transaction([OBJECT_STORE_ID], 'readwrite');
+  return new Promise(function (res, rej) {
+    transaction.oncomplete = function () {
+      return res();
+    };
+
+    transaction.onerror = function (ev) {
+      return rej(ev);
+    };
+
+    var objectStore = transaction.objectStore(OBJECT_STORE_ID);
+    objectStore.add(writeObject);
+  });
+}
+
+function getAllMessages(db) {
+  var objectStore = db.transaction(OBJECT_STORE_ID).objectStore(OBJECT_STORE_ID);
+  var ret = [];
+  return new Promise(function (res) {
+    objectStore.openCursor().onsuccess = function (ev) {
+      var cursor = ev.target.result;
+
+      if (cursor) {
+        ret.push(cursor.value); //alert("Name for SSN " + cursor.key + " is " + cursor.value.name);
+
+        cursor["continue"]();
+      } else {
+        res(ret);
+      }
+    };
+  });
+}
+
+function getMessagesHigherThan(db, lastCursorId) {
+  var objectStore = db.transaction(OBJECT_STORE_ID).objectStore(OBJECT_STORE_ID);
+  var ret = [];
+
+  function openCursor() {
+    // Occasionally Safari will fail on IDBKeyRange.bound, this
+    // catches that error, having it open the cursor to the first
+    // item. When it gets data it will advance to the desired key.
+    try {
+      var keyRangeValue = IDBKeyRange.bound(lastCursorId + 1, Infinity);
+      return objectStore.openCursor(keyRangeValue);
+    } catch (e) {
+      return objectStore.openCursor();
+    }
+  }
+
+  return new Promise(function (res) {
+    openCursor().onsuccess = function (ev) {
+      var cursor = ev.target.result;
+
+      if (cursor) {
+        if (cursor.value.id < lastCursorId + 1) {
+          cursor["continue"](lastCursorId + 1);
+        } else {
+          ret.push(cursor.value);
+          cursor["continue"]();
+        }
+      } else {
+        res(ret);
+      }
+    };
+  });
+}
+
+function removeMessageById(db, id) {
+  var request = db.transaction([OBJECT_STORE_ID], 'readwrite').objectStore(OBJECT_STORE_ID)["delete"](id);
+  return new Promise(function (res) {
+    request.onsuccess = function () {
+      return res();
+    };
+  });
+}
+
+function getOldMessages(db, ttl) {
+  var olderThen = new Date().getTime() - ttl;
+  var objectStore = db.transaction(OBJECT_STORE_ID).objectStore(OBJECT_STORE_ID);
+  var ret = [];
+  return new Promise(function (res) {
+    objectStore.openCursor().onsuccess = function (ev) {
+      var cursor = ev.target.result;
+
+      if (cursor) {
+        var msgObk = cursor.value;
+
+        if (msgObk.time < olderThen) {
+          ret.push(msgObk); //alert("Name for SSN " + cursor.key + " is " + cursor.value.name);
+
+          cursor["continue"]();
+        } else {
+          // no more old messages,
+          res(ret);
+          return;
+        }
+      } else {
+        res(ret);
+      }
+    };
+  });
+}
+
+function cleanOldMessages(db, ttl) {
+  return getOldMessages(db, ttl).then(function (tooOld) {
+    return Promise.all(tooOld.map(function (msgObj) {
+      return removeMessageById(db, msgObj.id);
+    }));
+  });
+}
+
+function create(channelName, options) {
+  options = (0, _options.fillOptionsWithDefaults)(options);
+  return createDatabase(channelName).then(function (db) {
+    var state = {
+      closed: false,
+      lastCursorId: 0,
+      channelName: channelName,
+      options: options,
+      uuid: (0, _util.randomToken)(),
+
+      /**
+       * emittedMessagesIds
+       * contains all messages that have been emitted before
+       * @type {ObliviousSet}
+       */
+      eMIs: new _obliviousSet.ObliviousSet(options.idb.ttl * 2),
+      // ensures we do not read messages in parrallel
+      writeBlockPromise: Promise.resolve(),
+      messagesCallback: null,
+      readQueuePromises: [],
+      db: db
+    };
+    /**
+     * Handle abrupt closes that do not originate from db.close().
+     * This could happen, for example, if the underlying storage is
+     * removed or if the user clears the database in the browser's
+     * history preferences.
+     */
+
+    db.onclose = function () {
+      state.closed = true;
+      if (options.idb.onclose) options.idb.onclose();
+    };
+    /**
+     * if service-workers are used,
+     * we have no 'storage'-event if they post a message,
+     * therefore we also have to set an interval
+     */
+
+
+    _readLoop(state);
+
+    return state;
+  });
+}
+
+function _readLoop(state) {
+  if (state.closed) return;
+  readNewMessages(state).then(function () {
+    return (0, _util.sleep)(state.options.idb.fallbackInterval);
+  }).then(function () {
+    return _readLoop(state);
+  });
+}
+
+function _filterMessage(msgObj, state) {
+  if (msgObj.uuid === state.uuid) return false; // send by own
+
+  if (state.eMIs.has(msgObj.id)) return false; // already emitted
+
+  if (msgObj.data.time < state.messagesCallbackTime) return false; // older then onMessageCallback
+
+  return true;
+}
+/**
+ * reads all new messages from the database and emits them
+ */
+
+
+function readNewMessages(state) {
+  // channel already closed
+  if (state.closed) return Promise.resolve(); // if no one is listening, we do not need to scan for new messages
+
+  if (!state.messagesCallback) return Promise.resolve();
+  return getMessagesHigherThan(state.db, state.lastCursorId).then(function (newerMessages) {
+    var useMessages = newerMessages
+    /**
+     * there is a bug in iOS where the msgObj can be undefined some times
+     * so we filter them out
+     * @link https://github.com/pubkey/broadcast-channel/issues/19
+     */
+    .filter(function (msgObj) {
+      return !!msgObj;
+    }).map(function (msgObj) {
+      if (msgObj.id > state.lastCursorId) {
+        state.lastCursorId = msgObj.id;
+      }
+
+      return msgObj;
+    }).filter(function (msgObj) {
+      return _filterMessage(msgObj, state);
+    }).sort(function (msgObjA, msgObjB) {
+      return msgObjA.time - msgObjB.time;
+    }); // sort by time
+
+    useMessages.forEach(function (msgObj) {
+      if (state.messagesCallback) {
+        state.eMIs.add(msgObj.id);
+        state.messagesCallback(msgObj.data);
+      }
+    });
+    return Promise.resolve();
+  });
+}
+
+function close(channelState) {
+  channelState.closed = true;
+  channelState.db.close();
+}
+
+function postMessage(channelState, messageJson) {
+  channelState.writeBlockPromise = channelState.writeBlockPromise.then(function () {
+    return writeMessage(channelState.db, channelState.uuid, messageJson);
+  }).then(function () {
+    if ((0, _util.randomInt)(0, 10) === 0) {
+      /* await (do not await) */
+      cleanOldMessages(channelState.db, channelState.options.idb.ttl);
+    }
+  });
+  return channelState.writeBlockPromise;
+}
+
+function onMessage(channelState, fn, time) {
+  channelState.messagesCallbackTime = time;
+  channelState.messagesCallback = fn;
+  readNewMessages(channelState);
+}
+
+function canBeUsed() {
+  if (_util.isNode) return false;
+  var idb = getIdb();
+  if (!idb) return false;
+  return true;
+}
+
+function averageResponseTime(options) {
+  return options.idb.fallbackInterval * 2;
+}
+
+var _default = {
+  create: create,
+  close: close,
+  onMessage: onMessage,
+  postMessage: postMessage,
+  canBeUsed: canBeUsed,
+  type: type,
+  averageResponseTime: averageResponseTime,
+  microSeconds: microSeconds
+};
+exports["default"] = _default;

server/node_modules/broadcast-channel/dist/lib/methods/localstorage.js

@@ -0,0 +1,197 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.getLocalStorage = getLocalStorage;
+exports.storageKey = storageKey;
+exports.postMessage = postMessage;
+exports.addStorageEventListener = addStorageEventListener;
+exports.removeStorageEventListener = removeStorageEventListener;
+exports.create = create;
+exports.close = close;
+exports.onMessage = onMessage;
+exports.canBeUsed = canBeUsed;
+exports.averageResponseTime = averageResponseTime;
+exports["default"] = exports.type = exports.microSeconds = void 0;
+
+var _obliviousSet = require("oblivious-set");
+
+var _options = require("../options");
+
+var _util = require("../util");
+
+/**
+ * A localStorage-only method which uses localstorage and its 'storage'-event
+ * This does not work inside of webworkers because they have no access to locastorage
+ * This is basically implemented to support IE9 or your grandmothers toaster.
+ * @link https://caniuse.com/#feat=namevalue-storage
+ * @link https://caniuse.com/#feat=indexeddb
+ */
+var microSeconds = _util.microSeconds;
+exports.microSeconds = microSeconds;
+var KEY_PREFIX = 'pubkey.broadcastChannel-';
+var type = 'localstorage';
+/**
+ * copied from crosstab
+ * @link https://github.com/tejacques/crosstab/blob/master/src/crosstab.js#L32
+ */
+
+exports.type = type;
+
+function getLocalStorage() {
+  var localStorage;
+  if (typeof window === 'undefined') return null;
+
+  try {
+    localStorage = window.localStorage;
+    localStorage = window['ie8-eventlistener/storage'] || window.localStorage;
+  } catch (e) {// New versions of Firefox throw a Security exception
+    // if cookies are disabled. See
+    // https://bugzilla.mozilla.org/show_bug.cgi?id=1028153
+  }
+
+  return localStorage;
+}
+
+function storageKey(channelName) {
+  return KEY_PREFIX + channelName;
+}
+/**
+* writes the new message to the storage
+* and fires the storage-event so other readers can find it
+*/
+
+
+function postMessage(channelState, messageJson) {
+  return new Promise(function (res) {
+    (0, _util.sleep)().then(function () {
+      var key = storageKey(channelState.channelName);
+      var writeObj = {
+        token: (0, _util.randomToken)(),
+        time: new Date().getTime(),
+        data: messageJson,
+        uuid: channelState.uuid
+      };
+      var value = JSON.stringify(writeObj);
+      getLocalStorage().setItem(key, value);
+      /**
+       * StorageEvent does not fire the 'storage' event
+       * in the window that changes the state of the local storage.
+       * So we fire it manually
+       */
+
+      var ev = document.createEvent('Event');
+      ev.initEvent('storage', true, true);
+      ev.key = key;
+      ev.newValue = value;
+      window.dispatchEvent(ev);
+      res();
+    });
+  });
+}
+
+function addStorageEventListener(channelName, fn) {
+  var key = storageKey(channelName);
+
+  var listener = function listener(ev) {
+    if (ev.key === key) {
+      fn(JSON.parse(ev.newValue));
+    }
+  };
+
+  window.addEventListener('storage', listener);
+  return listener;
+}
+
+function removeStorageEventListener(listener) {
+  window.removeEventListener('storage', listener);
+}
+
+function create(channelName, options) {
+  options = (0, _options.fillOptionsWithDefaults)(options);
+
+  if (!canBeUsed()) {
+    throw new Error('BroadcastChannel: localstorage cannot be used');
+  }
+
+  var uuid = (0, _util.randomToken)();
+  /**
+   * eMIs
+   * contains all messages that have been emitted before
+   * @type {ObliviousSet}
+   */
+
+  var eMIs = new _obliviousSet.ObliviousSet(options.localstorage.removeTimeout);
+  var state = {
+    channelName: channelName,
+    uuid: uuid,
+    eMIs: eMIs // emittedMessagesIds
+
+  };
+  state.listener = addStorageEventListener(channelName, function (msgObj) {
+    if (!state.messagesCallback) return; // no listener
+
+    if (msgObj.uuid === uuid) return; // own message
+
+    if (!msgObj.token || eMIs.has(msgObj.token)) return; // already emitted
+
+    if (msgObj.data.time && msgObj.data.time < state.messagesCallbackTime) return; // too old
+
+    eMIs.add(msgObj.token);
+    state.messagesCallback(msgObj.data);
+  });
+  return state;
+}
+
+function close(channelState) {
+  removeStorageEventListener(channelState.listener);
+}
+
+function onMessage(channelState, fn, time) {
+  channelState.messagesCallbackTime = time;
+  channelState.messagesCallback = fn;
+}
+
+function canBeUsed() {
+  if (_util.isNode) return false;
+  var ls = getLocalStorage();
+  if (!ls) return false;
+
+  try {
+    var key = '__broadcastchannel_check';
+    ls.setItem(key, 'works');
+    ls.removeItem(key);
+  } catch (e) {
+    // Safari 10 in private mode will not allow write access to local
+    // storage and fail with a QuotaExceededError. See
+    // https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API#Private_Browsing_Incognito_modes
+    return false;
+  }
+
+  return true;
+}
+
+function averageResponseTime() {
+  var defaultTime = 120;
+  var userAgent = navigator.userAgent.toLowerCase();
+
+  if (userAgent.includes('safari') && !userAgent.includes('chrome')) {
+    // safari is much slower so this time is higher
+    return defaultTime * 2;
+  }
+
+  return defaultTime;
+}
+
+var _default = {
+  create: create,
+  close: close,
+  onMessage: onMessage,
+  postMessage: postMessage,
+  canBeUsed: canBeUsed,
+  type: type,
+  averageResponseTime: averageResponseTime,
+  microSeconds: microSeconds
+};
+exports["default"] = _default;

server/node_modules/broadcast-channel/dist/lib/methods/native.js

@@ -0,0 +1,86 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.create = create;
+exports.close = close;
+exports.postMessage = postMessage;
+exports.onMessage = onMessage;
+exports.canBeUsed = canBeUsed;
+exports.averageResponseTime = averageResponseTime;
+exports["default"] = exports.type = exports.microSeconds = void 0;
+
+var _util = require("../util");
+
+var microSeconds = _util.microSeconds;
+exports.microSeconds = microSeconds;
+var type = 'native';
+exports.type = type;
+
+function create(channelName) {
+  var state = {
+    messagesCallback: null,
+    bc: new BroadcastChannel(channelName),
+    subFns: [] // subscriberFunctions
+
+  };
+
+  state.bc.onmessage = function (msg) {
+    if (state.messagesCallback) {
+      state.messagesCallback(msg.data);
+    }
+  };
+
+  return state;
+}
+
+function close(channelState) {
+  channelState.bc.close();
+  channelState.subFns = [];
+}
+
+function postMessage(channelState, messageJson) {
+  try {
+    channelState.bc.postMessage(messageJson, false);
+    return Promise.resolve();
+  } catch (err) {
+    return Promise.reject(err);
+  }
+}
+
+function onMessage(channelState, fn) {
+  channelState.messagesCallback = fn;
+}
+
+function canBeUsed() {
+  /**
+   * in the electron-renderer, isNode will be true even if we are in browser-context
+   * so we also check if window is undefined
+   */
+  if (_util.isNode && typeof window === 'undefined') return false;
+
+  if (typeof BroadcastChannel === 'function') {
+    if (BroadcastChannel._pubkey) {
+      throw new Error('BroadcastChannel: Do not overwrite window.BroadcastChannel with this module, this is not a polyfill');
+    }
+
+    return true;
+  } else return false;
+}
+
+function averageResponseTime() {
+  return 150;
+}
+
+var _default = {
+  create: create,
+  close: close,
+  onMessage: onMessage,
+  postMessage: postMessage,
+  canBeUsed: canBeUsed,
+  type: type,
+  averageResponseTime: averageResponseTime,
+  microSeconds: microSeconds
+};
+exports["default"] = _default;

server/node_modules/broadcast-channel/dist/lib/methods/simulate.js

@@ -0,0 +1,75 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.create = create;
+exports.close = close;
+exports.postMessage = postMessage;
+exports.onMessage = onMessage;
+exports.canBeUsed = canBeUsed;
+exports.averageResponseTime = averageResponseTime;
+exports["default"] = exports.type = exports.microSeconds = void 0;
+
+var _util = require("../util");
+
+var microSeconds = _util.microSeconds;
+exports.microSeconds = microSeconds;
+var type = 'simulate';
+exports.type = type;
+var SIMULATE_CHANNELS = new Set();
+
+function create(channelName) {
+  var state = {
+    name: channelName,
+    messagesCallback: null
+  };
+  SIMULATE_CHANNELS.add(state);
+  return state;
+}
+
+function close(channelState) {
+  SIMULATE_CHANNELS["delete"](channelState);
+}
+
+function postMessage(channelState, messageJson) {
+  return new Promise(function (res) {
+    return setTimeout(function () {
+      var channelArray = Array.from(SIMULATE_CHANNELS);
+      channelArray.filter(function (channel) {
+        return channel.name === channelState.name;
+      }).filter(function (channel) {
+        return channel !== channelState;
+      }).filter(function (channel) {
+        return !!channel.messagesCallback;
+      }).forEach(function (channel) {
+        return channel.messagesCallback(messageJson);
+      });
+      res();
+    }, 5);
+  });
+}
+
+function onMessage(channelState, fn) {
+  channelState.messagesCallback = fn;
+}
+
+function canBeUsed() {
+  return true;
+}
+
+function averageResponseTime() {
+  return 5;
+}
+
+var _default = {
+  create: create,
+  close: close,
+  onMessage: onMessage,
+  postMessage: postMessage,
+  canBeUsed: canBeUsed,
+  type: type,
+  averageResponseTime: averageResponseTime,
+  microSeconds: microSeconds
+};
+exports["default"] = _default;

server/node_modules/broadcast-channel/dist/lib/options.js

@@ -0,0 +1,31 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.fillOptionsWithDefaults = fillOptionsWithDefaults;
+
+function fillOptionsWithDefaults() {
+  var originalOptions = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
+  var options = JSON.parse(JSON.stringify(originalOptions)); // main
+
+  if (typeof options.webWorkerSupport === 'undefined') options.webWorkerSupport = true; // indexed-db
+
+  if (!options.idb) options.idb = {}; //  after this time the messages get deleted
+
+  if (!options.idb.ttl) options.idb.ttl = 1000 * 45;
+  if (!options.idb.fallbackInterval) options.idb.fallbackInterval = 150; //  handles abrupt db onclose events.
+
+  if (originalOptions.idb && typeof originalOptions.idb.onclose === 'function') options.idb.onclose = originalOptions.idb.onclose; // localstorage
+
+  if (!options.localstorage) options.localstorage = {};
+  if (!options.localstorage.removeTimeout) options.localstorage.removeTimeout = 1000 * 60; // custom methods
+
+  if (originalOptions.methods) options.methods = originalOptions.methods; // node
+
+  if (!options.node) options.node = {};
+  if (!options.node.ttl) options.node.ttl = 1000 * 60 * 2; // 2 minutes;
+
+  if (typeof options.node.useFastPath === 'undefined') options.node.useFastPath = true;
+  return options;
+}

server/node_modules/broadcast-channel/dist/lib/util.js

@@ -0,0 +1,73 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.isPromise = isPromise;
+exports.sleep = sleep;
+exports.randomInt = randomInt;
+exports.randomToken = randomToken;
+exports.microSeconds = microSeconds;
+exports.isNode = void 0;
+
+/**
+ * returns true if the given object is a promise
+ */
+function isPromise(obj) {
+  if (obj && typeof obj.then === 'function') {
+    return true;
+  } else {
+    return false;
+  }
+}
+
+function sleep(time) {
+  if (!time) time = 0;
+  return new Promise(function (res) {
+    return setTimeout(res, time);
+  });
+}
+
+function randomInt(min, max) {
+  return Math.floor(Math.random() * (max - min + 1) + min);
+}
+/**
+ * https://stackoverflow.com/a/8084248
+ */
+
+
+function randomToken() {
+  return Math.random().toString(36).substring(2);
+}
+
+var lastMs = 0;
+var additional = 0;
+/**
+ * returns the current time in micro-seconds,
+ * WARNING: This is a pseudo-function
+ * Performance.now is not reliable in webworkers, so we just make sure to never return the same time.
+ * This is enough in browsers, and this function will not be used in nodejs.
+ * The main reason for this hack is to ensure that BroadcastChannel behaves equal to production when it is used in fast-running unit tests.
+ */
+
+function microSeconds() {
+  var ms = new Date().getTime();
+
+  if (ms === lastMs) {
+    additional++;
+    return ms * 1000 + additional;
+  } else {
+    lastMs = ms;
+    additional = 0;
+    return ms * 1000;
+  }
+}
+/**
+ * copied from the 'detect-node' npm module
+ * We cannot use the module directly because it causes problems with rollup
+ * @link https://github.com/iliakan/detect-node/blob/master/index.js
+ */
+
+
+var isNode = Object.prototype.toString.call(typeof process !== 'undefined' ? process : 0) === '[object process]';
+exports.isNode = isNode;

server/node_modules/broadcast-channel/node_modules/.bin/rimraf

@@ -0,0 +1 @@
+../rimraf/bin.js

server/node_modules/broadcast-channel/node_modules/brace-expansion/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2013 Julian Gruber <julian@juliangruber.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

server/node_modules/broadcast-channel/node_modules/brace-expansion/README.md

@@ -0,0 +1,129 @@
+# brace-expansion
+
+[Brace expansion](https://www.gnu.org/software/bash/manual/html_node/Brace-Expansion.html), 
+as known from sh/bash, in JavaScript.
+
+[![build status](https://secure.travis-ci.org/juliangruber/brace-expansion.svg)](http://travis-ci.org/juliangruber/brace-expansion)
+[![downloads](https://img.shields.io/npm/dm/brace-expansion.svg)](https://www.npmjs.org/package/brace-expansion)
+[![Greenkeeper badge](https://badges.greenkeeper.io/juliangruber/brace-expansion.svg)](https://greenkeeper.io/)
+
+[![testling badge](https://ci.testling.com/juliangruber/brace-expansion.png)](https://ci.testling.com/juliangruber/brace-expansion)
+
+## Example
+
+```js
+var expand = require('brace-expansion');
+
+expand('file-{a,b,c}.jpg')
+// => ['file-a.jpg', 'file-b.jpg', 'file-c.jpg']
+
+expand('-v{,,}')
+// => ['-v', '-v', '-v']
+
+expand('file{0..2}.jpg')
+// => ['file0.jpg', 'file1.jpg', 'file2.jpg']
+
+expand('file-{a..c}.jpg')
+// => ['file-a.jpg', 'file-b.jpg', 'file-c.jpg']
+
+expand('file{2..0}.jpg')
+// => ['file2.jpg', 'file1.jpg', 'file0.jpg']
+
+expand('file{0..4..2}.jpg')
+// => ['file0.jpg', 'file2.jpg', 'file4.jpg']
+
+expand('file-{a..e..2}.jpg')
+// => ['file-a.jpg', 'file-c.jpg', 'file-e.jpg']
+
+expand('file{00..10..5}.jpg')
+// => ['file00.jpg', 'file05.jpg', 'file10.jpg']
+
+expand('{{A..C},{a..c}}')
+// => ['A', 'B', 'C', 'a', 'b', 'c']
+
+expand('ppp{,config,oe{,conf}}')
+// => ['ppp', 'pppconfig', 'pppoe', 'pppoeconf']
+```
+
+## API
+
+```js
+var expand = require('brace-expansion');
+```
+
+### var expanded = expand(str)
+
+Return an array of all possible and valid expansions of `str`. If none are
+found, `[str]` is returned.
+
+Valid expansions are:
+
+```js
+/^(.*,)+(.+)?$/
+// {a,b,...}
+```
+
+A comma separated list of options, like `{a,b}` or `{a,{b,c}}` or `{,a,}`.
+
+```js
+/^-?\d+\.\.-?\d+(\.\.-?\d+)?$/
+// {x..y[..incr]}
+```
+
+A numeric sequence from `x` to `y` inclusive, with optional increment.
+If `x` or `y` start with a leading `0`, all the numbers will be padded
+to have equal length. Negative numbers and backwards iteration work too.
+
+```js
+/^-?\d+\.\.-?\d+(\.\.-?\d+)?$/
+// {x..y[..incr]}
+```
+
+An alphabetic sequence from `x` to `y` inclusive, with optional increment.
+`x` and `y` must be exactly one character, and if given, `incr` must be a
+number.
+
+For compatibility reasons, the string `${` is not eligible for brace expansion.
+
+## Installation
+
+With [npm](https://npmjs.org) do:
+
+```bash
+npm install brace-expansion
+```
+
+## Contributors
+
+- [Julian Gruber](https://github.com/juliangruber)
+- [Isaac Z. Schlueter](https://github.com/isaacs)
+
+## Sponsors
+
+This module is proudly supported by my [Sponsors](https://github.com/juliangruber/sponsors)!
+
+Do you want to support modules like this to improve their quality, stability and weigh in on new features? Then please consider donating to my [Patreon](https://www.patreon.com/juliangruber). Not sure how much of my modules you're using? Try [feross/thanks](https://github.com/feross/thanks)!
+
+## License
+
+(MIT)
+
+Copyright (c) 2013 Julian Gruber <julian@juliangruber.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

server/node_modules/broadcast-channel/node_modules/brace-expansion/index.js

@@ -0,0 +1,201 @@
+var concatMap = require('concat-map');
+var balanced = require('balanced-match');
+
+module.exports = expandTop;
+
+var escSlash = '\0SLASH'+Math.random()+'\0';
+var escOpen = '\0OPEN'+Math.random()+'\0';
+var escClose = '\0CLOSE'+Math.random()+'\0';
+var escComma = '\0COMMA'+Math.random()+'\0';
+var escPeriod = '\0PERIOD'+Math.random()+'\0';
+
+function numeric(str) {
+  return parseInt(str, 10) == str
+    ? parseInt(str, 10)
+    : str.charCodeAt(0);
+}
+
+function escapeBraces(str) {
+  return str.split('\\\\').join(escSlash)
+            .split('\\{').join(escOpen)
+            .split('\\}').join(escClose)
+            .split('\\,').join(escComma)
+            .split('\\.').join(escPeriod);
+}
+
+function unescapeBraces(str) {
+  return str.split(escSlash).join('\\')
+            .split(escOpen).join('{')
+            .split(escClose).join('}')
+            .split(escComma).join(',')
+            .split(escPeriod).join('.');
+}
+
+
+// Basically just str.split(","), but handling cases
+// where we have nested braced sections, which should be
+// treated as individual members, like {a,{b,c},d}
+function parseCommaParts(str) {
+  if (!str)
+    return [''];
+
+  var parts = [];
+  var m = balanced('{', '}', str);
+
+  if (!m)
+    return str.split(',');
+
+  var pre = m.pre;
+  var body = m.body;
+  var post = m.post;
+  var p = pre.split(',');
+
+  p[p.length-1] += '{' + body + '}';
+  var postParts = parseCommaParts(post);
+  if (post.length) {
+    p[p.length-1] += postParts.shift();
+    p.push.apply(p, postParts);
+  }
+
+  parts.push.apply(parts, p);
+
+  return parts;
+}
+
+function expandTop(str) {
+  if (!str)
+    return [];
+
+  // I don't know why Bash 4.3 does this, but it does.
+  // Anything starting with {} will have the first two bytes preserved
+  // but *only* at the top level, so {},a}b will not expand to anything,
+  // but a{},b}c will be expanded to [a}c,abc].
+  // One could argue that this is a bug in Bash, but since the goal of
+  // this module is to match Bash's rules, we escape a leading {}
+  if (str.substr(0, 2) === '{}') {
+    str = '\\{\\}' + str.substr(2);
+  }
+
+  return expand(escapeBraces(str), true).map(unescapeBraces);
+}
+
+function identity(e) {
+  return e;
+}
+
+function embrace(str) {
+  return '{' + str + '}';
+}
+function isPadded(el) {
+  return /^-?0\d/.test(el);
+}
+
+function lte(i, y) {
+  return i <= y;
+}
+function gte(i, y) {
+  return i >= y;
+}
+
+function expand(str, isTop) {
+  var expansions = [];
+
+  var m = balanced('{', '}', str);
+  if (!m || /\$$/.test(m.pre)) return [str];
+
+  var isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
+  var isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
+  var isSequence = isNumericSequence || isAlphaSequence;
+  var isOptions = m.body.indexOf(',') >= 0;
+  if (!isSequence && !isOptions) {
+    // {a},b}
+    if (m.post.match(/,.*\}/)) {
+      str = m.pre + '{' + m.body + escClose + m.post;
+      return expand(str);
+    }
+    return [str];
+  }
+
+  var n;
+  if (isSequence) {
+    n = m.body.split(/\.\./);
+  } else {
+    n = parseCommaParts(m.body);
+    if (n.length === 1) {
+      // x{{a,b}}y ==> x{a}y x{b}y
+      n = expand(n[0], false).map(embrace);
+      if (n.length === 1) {
+        var post = m.post.length
+          ? expand(m.post, false)
+          : [''];
+        return post.map(function(p) {
+          return m.pre + n[0] + p;
+        });
+      }
+    }
+  }
+
+  // at this point, n is the parts, and we know it's not a comma set
+  // with a single entry.
+
+  // no need to expand pre, since it is guaranteed to be free of brace-sets
+  var pre = m.pre;
+  var post = m.post.length
+    ? expand(m.post, false)
+    : [''];
+
+  var N;
+
+  if (isSequence) {
+    var x = numeric(n[0]);
+    var y = numeric(n[1]);
+    var width = Math.max(n[0].length, n[1].length)
+    var incr = n.length == 3
+      ? Math.abs(numeric(n[2]))
+      : 1;
+    var test = lte;
+    var reverse = y < x;
+    if (reverse) {
+      incr *= -1;
+      test = gte;
+    }
+    var pad = n.some(isPadded);
+
+    N = [];
+
+    for (var i = x; test(i, y); i += incr) {
+      var c;
+      if (isAlphaSequence) {
+        c = String.fromCharCode(i);
+        if (c === '\\')
+          c = '';
+      } else {
+        c = String(i);
+        if (pad) {
+          var need = width - c.length;
+          if (need > 0) {
+            var z = new Array(need + 1).join('0');
+            if (i < 0)
+              c = '-' + z + c.slice(1);
+            else
+              c = z + c;
+          }
+        }
+      }
+      N.push(c);
+    }
+  } else {
+    N = concatMap(n, function(el) { return expand(el, false) });
+  }
+
+  for (var j = 0; j < N.length; j++) {
+    for (var k = 0; k < post.length; k++) {
+      var expansion = pre + N[j] + post[k];
+      if (!isTop || isSequence || expansion)
+        expansions.push(expansion);
+    }
+  }
+
+  return expansions;
+}
+

server/node_modules/broadcast-channel/node_modules/brace-expansion/package.json

@@ -0,0 +1,47 @@
+{
+  "name": "brace-expansion",
+  "description": "Brace expansion as known from sh/bash",
+  "version": "1.1.11",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/juliangruber/brace-expansion.git"
+  },
+  "homepage": "https://github.com/juliangruber/brace-expansion",
+  "main": "index.js",
+  "scripts": {
+    "test": "tape test/*.js",
+    "gentest": "bash test/generate.sh",
+    "bench": "matcha test/perf/bench.js"
+  },
+  "dependencies": {
+    "balanced-match": "^1.0.0",
+    "concat-map": "0.0.1"
+  },
+  "devDependencies": {
+    "matcha": "^0.7.0",
+    "tape": "^4.6.0"
+  },
+  "keywords": [],
+  "author": {
+    "name": "Julian Gruber",
+    "email": "mail@juliangruber.com",
+    "url": "http://juliangruber.com"
+  },
+  "license": "MIT",
+  "testling": {
+    "files": "test/*.js",
+    "browsers": [
+      "ie/8..latest",
+      "firefox/20..latest",
+      "firefox/nightly",
+      "chrome/25..latest",
+      "chrome/canary",
+      "opera/12..latest",
+      "opera/next",
+      "safari/5.1..latest",
+      "ipad/6.0..latest",
+      "iphone/6.0..latest",
+      "android-browser/4.2..latest"
+    ]
+  }
+}

server/node_modules/broadcast-channel/node_modules/glob/LICENSE

@@ -0,0 +1,21 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+## Glob Logo
+
+Glob's logo created by Tanya Brassie <http://tanyabrassie.com/>, licensed
+under a Creative Commons Attribution-ShareAlike 4.0 International License
+https://creativecommons.org/licenses/by-sa/4.0/

server/node_modules/broadcast-channel/node_modules/glob/README.md

@@ -0,0 +1,378 @@
+# Glob
+
+Match files using the patterns the shell uses, like stars and stuff.
+
+[![Build Status](https://travis-ci.org/isaacs/node-glob.svg?branch=master)](https://travis-ci.org/isaacs/node-glob/) [![Build Status](https://ci.appveyor.com/api/projects/status/kd7f3yftf7unxlsx?svg=true)](https://ci.appveyor.com/project/isaacs/node-glob) [![Coverage Status](https://coveralls.io/repos/isaacs/node-glob/badge.svg?branch=master&service=github)](https://coveralls.io/github/isaacs/node-glob?branch=master)
+
+This is a glob implementation in JavaScript.  It uses the `minimatch`
+library to do its matching.
+
+![a fun cartoon logo made of glob characters](logo/glob.png)
+
+## Usage
+
+Install with npm
+
+```
+npm i glob
+```
+
+```javascript
+var glob = require("glob")
+
+// options is optional
+glob("**/*.js", options, function (er, files) {
+  // files is an array of filenames.
+  // If the `nonull` option is set, and nothing
+  // was found, then files is ["**/*.js"]
+  // er is an error object or null.
+})
+```
+
+## Glob Primer
+
+"Globs" are the patterns you type when you do stuff like `ls *.js` on
+the command line, or put `build/*` in a `.gitignore` file.
+
+Before parsing the path part patterns, braced sections are expanded
+into a set.  Braced sections start with `{` and end with `}`, with any
+number of comma-delimited sections within.  Braced sections may contain
+slash characters, so `a{/b/c,bcd}` would expand into `a/b/c` and `abcd`.
+
+The following characters have special magic meaning when used in a
+path portion:
+
+* `*` Matches 0 or more characters in a single path portion
+* `?` Matches 1 character
+* `[...]` Matches a range of characters, similar to a RegExp range.
+  If the first character of the range is `!` or `^` then it matches
+  any character not in the range.
+* `!(pattern|pattern|pattern)` Matches anything that does not match
+  any of the patterns provided.
+* `?(pattern|pattern|pattern)` Matches zero or one occurrence of the
+  patterns provided.
+* `+(pattern|pattern|pattern)` Matches one or more occurrences of the
+  patterns provided.
+* `*(a|b|c)` Matches zero or more occurrences of the patterns provided
+* `@(pattern|pat*|pat?erN)` Matches exactly one of the patterns
+  provided
+* `**` If a "globstar" is alone in a path portion, then it matches
+  zero or more directories and subdirectories searching for matches.
+  It does not crawl symlinked directories.
+
+### Dots
+
+If a file or directory path portion has a `.` as the first character,
+then it will not match any glob pattern unless that pattern's
+corresponding path part also has a `.` as its first character.
+
+For example, the pattern `a/.*/c` would match the file at `a/.b/c`.
+However the pattern `a/*/c` would not, because `*` does not start with
+a dot character.
+
+You can make glob treat dots as normal characters by setting
+`dot:true` in the options.
+
+### Basename Matching
+
+If you set `matchBase:true` in the options, and the pattern has no
+slashes in it, then it will seek for any file anywhere in the tree
+with a matching basename.  For example, `*.js` would match
+`test/simple/basic.js`.
+
+### Empty Sets
+
+If no matching files are found, then an empty array is returned.  This
+differs from the shell, where the pattern itself is returned.  For
+example:
+
+    $ echo a*s*d*f
+    a*s*d*f
+
+To get the bash-style behavior, set the `nonull:true` in the options.
+
+### See Also:
+
+* `man sh`
+* `man bash` (Search for "Pattern Matching")
+* `man 3 fnmatch`
+* `man 5 gitignore`
+* [minimatch documentation](https://github.com/isaacs/minimatch)
+
+## glob.hasMagic(pattern, [options])
+
+Returns `true` if there are any special characters in the pattern, and
+`false` otherwise.
+
+Note that the options affect the results.  If `noext:true` is set in
+the options object, then `+(a|b)` will not be considered a magic
+pattern.  If the pattern has a brace expansion, like `a/{b/c,x/y}`
+then that is considered magical, unless `nobrace:true` is set in the
+options.
+
+## glob(pattern, [options], cb)
+
+* `pattern` `{String}` Pattern to be matched
+* `options` `{Object}`
+* `cb` `{Function}`
+  * `err` `{Error | null}`
+  * `matches` `{Array<String>}` filenames found matching the pattern
+
+Perform an asynchronous glob search.
+
+## glob.sync(pattern, [options])
+
+* `pattern` `{String}` Pattern to be matched
+* `options` `{Object}`
+* return: `{Array<String>}` filenames found matching the pattern
+
+Perform a synchronous glob search.
+
+## Class: glob.Glob
+
+Create a Glob object by instantiating the `glob.Glob` class.
+
+```javascript
+var Glob = require("glob").Glob
+var mg = new Glob(pattern, options, cb)
+```
+
+It's an EventEmitter, and starts walking the filesystem to find matches
+immediately.
+
+### new glob.Glob(pattern, [options], [cb])
+
+* `pattern` `{String}` pattern to search for
+* `options` `{Object}`
+* `cb` `{Function}` Called when an error occurs, or matches are found
+  * `err` `{Error | null}`
+  * `matches` `{Array<String>}` filenames found matching the pattern
+
+Note that if the `sync` flag is set in the options, then matches will
+be immediately available on the `g.found` member.
+
+### Properties
+
+* `minimatch` The minimatch object that the glob uses.
+* `options` The options object passed in.
+* `aborted` Boolean which is set to true when calling `abort()`.  There
+  is no way at this time to continue a glob search after aborting, but
+  you can re-use the statCache to avoid having to duplicate syscalls.
+* `cache` Convenience object.  Each field has the following possible
+  values:
+  * `false` - Path does not exist
+  * `true` - Path exists
+  * `'FILE'` - Path exists, and is not a directory
+  * `'DIR'` - Path exists, and is a directory
+  * `[file, entries, ...]` - Path exists, is a directory, and the
+    array value is the results of `fs.readdir`
+* `statCache` Cache of `fs.stat` results, to prevent statting the same
+  path multiple times.
+* `symlinks` A record of which paths are symbolic links, which is
+  relevant in resolving `**` patterns.
+* `realpathCache` An optional object which is passed to `fs.realpath`
+  to minimize unnecessary syscalls.  It is stored on the instantiated
+  Glob object, and may be re-used.
+
+### Events
+
+* `end` When the matching is finished, this is emitted with all the
+  matches found.  If the `nonull` option is set, and no match was found,
+  then the `matches` list contains the original pattern.  The matches
+  are sorted, unless the `nosort` flag is set.
+* `match` Every time a match is found, this is emitted with the specific
+  thing that matched. It is not deduplicated or resolved to a realpath.
+* `error` Emitted when an unexpected error is encountered, or whenever
+  any fs error occurs if `options.strict` is set.
+* `abort` When `abort()` is called, this event is raised.
+
+### Methods
+
+* `pause` Temporarily stop the search
+* `resume` Resume the search
+* `abort` Stop the search forever
+
+### Options
+
+All the options that can be passed to Minimatch can also be passed to
+Glob to change pattern matching behavior.  Also, some have been added,
+or have glob-specific ramifications.
+
+All options are false by default, unless otherwise noted.
+
+All options are added to the Glob object, as well.
+
+If you are running many `glob` operations, you can pass a Glob object
+as the `options` argument to a subsequent operation to shortcut some
+`stat` and `readdir` calls.  At the very least, you may pass in shared
+`symlinks`, `statCache`, `realpathCache`, and `cache` options, so that
+parallel glob operations will be sped up by sharing information about
+the filesystem.
+
+* `cwd` The current working directory in which to search.  Defaults
+  to `process.cwd()`.
+* `root` The place where patterns starting with `/` will be mounted
+  onto.  Defaults to `path.resolve(options.cwd, "/")` (`/` on Unix
+  systems, and `C:\` or some such on Windows.)
+* `dot` Include `.dot` files in normal matches and `globstar` matches.
+  Note that an explicit dot in a portion of the pattern will always
+  match dot files.
+* `nomount` By default, a pattern starting with a forward-slash will be
+  "mounted" onto the root setting, so that a valid filesystem path is
+  returned.  Set this flag to disable that behavior.
+* `mark` Add a `/` character to directory matches.  Note that this
+  requires additional stat calls.
+* `nosort` Don't sort the results.
+* `stat` Set to true to stat *all* results.  This reduces performance
+  somewhat, and is completely unnecessary, unless `readdir` is presumed
+  to be an untrustworthy indicator of file existence.
+* `silent` When an unusual error is encountered when attempting to
+  read a directory, a warning will be printed to stderr.  Set the
+  `silent` option to true to suppress these warnings.
+* `strict` When an unusual error is encountered when attempting to
+  read a directory, the process will just continue on in search of
+  other matches.  Set the `strict` option to raise an error in these
+  cases.
+* `cache` See `cache` property above.  Pass in a previously generated
+  cache object to save some fs calls.
+* `statCache` A cache of results of filesystem information, to prevent
+  unnecessary stat calls.  While it should not normally be necessary
+  to set this, you may pass the statCache from one glob() call to the
+  options object of another, if you know that the filesystem will not
+  change between calls.  (See "Race Conditions" below.)
+* `symlinks` A cache of known symbolic links.  You may pass in a
+  previously generated `symlinks` object to save `lstat` calls when
+  resolving `**` matches.
+* `sync` DEPRECATED: use `glob.sync(pattern, opts)` instead.
+* `nounique` In some cases, brace-expanded patterns can result in the
+  same file showing up multiple times in the result set.  By default,
+  this implementation prevents duplicates in the result set.  Set this
+  flag to disable that behavior.
+* `nonull` Set to never return an empty set, instead returning a set
+  containing the pattern itself.  This is the default in glob(3).
+* `debug` Set to enable debug logging in minimatch and glob.
+* `nobrace` Do not expand `{a,b}` and `{1..3}` brace sets.
+* `noglobstar` Do not match `**` against multiple filenames.  (Ie,
+  treat it as a normal `*` instead.)
+* `noext` Do not match `+(a|b)` "extglob" patterns.
+* `nocase` Perform a case-insensitive match.  Note: on
+  case-insensitive filesystems, non-magic patterns will match by
+  default, since `stat` and `readdir` will not raise errors.
+* `matchBase` Perform a basename-only match if the pattern does not
+  contain any slash characters.  That is, `*.js` would be treated as
+  equivalent to `**/*.js`, matching all js files in all directories.
+* `nodir` Do not match directories, only files.  (Note: to match
+  *only* directories, simply put a `/` at the end of the pattern.)
+* `ignore` Add a pattern or an array of glob patterns to exclude matches.
+  Note: `ignore` patterns are *always* in `dot:true` mode, regardless
+  of any other settings.
+* `follow` Follow symlinked directories when expanding `**` patterns.
+  Note that this can result in a lot of duplicate references in the
+  presence of cyclic links.
+* `realpath` Set to true to call `fs.realpath` on all of the results.
+  In the case of a symlink that cannot be resolved, the full absolute
+  path to the matched entry is returned (though it will usually be a
+  broken symlink)
+* `absolute` Set to true to always receive absolute paths for matched
+  files.  Unlike `realpath`, this also affects the values returned in
+  the `match` event.
+* `fs` File-system object with Node's `fs` API. By default, the built-in
+  `fs` module will be used. Set to a volume provided by a library like
+  `memfs` to avoid using the "real" file-system.
+
+## Comparisons to other fnmatch/glob implementations
+
+While strict compliance with the existing standards is a worthwhile
+goal, some discrepancies exist between node-glob and other
+implementations, and are intentional.
+
+The double-star character `**` is supported by default, unless the
+`noglobstar` flag is set.  This is supported in the manner of bsdglob
+and bash 4.3, where `**` only has special significance if it is the only
+thing in a path part.  That is, `a/**/b` will match `a/x/y/b`, but
+`a/**b` will not.
+
+Note that symlinked directories are not crawled as part of a `**`,
+though their contents may match against subsequent portions of the
+pattern.  This prevents infinite loops and duplicates and the like.
+
+If an escaped pattern has no matches, and the `nonull` flag is set,
+then glob returns the pattern as-provided, rather than
+interpreting the character escapes.  For example,
+`glob.match([], "\\*a\\?")` will return `"\\*a\\?"` rather than
+`"*a?"`.  This is akin to setting the `nullglob` option in bash, except
+that it does not resolve escaped pattern characters.
+
+If brace expansion is not disabled, then it is performed before any
+other interpretation of the glob pattern.  Thus, a pattern like
+`+(a|{b),c)}`, which would not be valid in bash or zsh, is expanded
+**first** into the set of `+(a|b)` and `+(a|c)`, and those patterns are
+checked for validity.  Since those two are valid, matching proceeds.
+
+### Comments and Negation
+
+Previously, this module let you mark a pattern as a "comment" if it
+started with a `#` character, or a "negated" pattern if it started
+with a `!` character.
+
+These options were deprecated in version 5, and removed in version 6.
+
+To specify things that should not match, use the `ignore` option.
+
+## Windows
+
+**Please only use forward-slashes in glob expressions.**
+
+Though windows uses either `/` or `\` as its path separator, only `/`
+characters are used by this glob implementation.  You must use
+forward-slashes **only** in glob expressions.  Back-slashes will always
+be interpreted as escape characters, not path separators.
+
+Results from absolute patterns such as `/foo/*` are mounted onto the
+root setting using `path.join`.  On windows, this will by default result
+in `/foo/*` matching `C:\foo\bar.txt`.
+
+## Race Conditions
+
+Glob searching, by its very nature, is susceptible to race conditions,
+since it relies on directory walking and such.
+
+As a result, it is possible that a file that exists when glob looks for
+it may have been deleted or modified by the time it returns the result.
+
+As part of its internal implementation, this program caches all stat
+and readdir calls that it makes, in order to cut down on system
+overhead.  However, this also makes it even more susceptible to races,
+especially if the cache or statCache objects are reused between glob
+calls.
+
+Users are thus advised not to use a glob result as a guarantee of
+filesystem state in the face of rapid changes.  For the vast majority
+of operations, this is never a problem.
+
+## Glob Logo
+Glob's logo was created by [Tanya Brassie](http://tanyabrassie.com/). Logo files can be found [here](https://github.com/isaacs/node-glob/tree/master/logo).
+
+The logo is licensed under a [Creative Commons Attribution-ShareAlike 4.0 International License](https://creativecommons.org/licenses/by-sa/4.0/).
+
+## Contributing
+
+Any change to behavior (including bugfixes) must come with a test.
+
+Patches that fail tests or reduce performance will be rejected.
+
+```
+# to run tests
+npm test
+
+# to re-generate test fixtures
+npm run test-regen
+
+# to benchmark against bash/zsh
+npm run bench
+
+# to profile javascript
+npm run prof
+```
+
+![](oh-my-glob.gif)

server/node_modules/broadcast-channel/node_modules/glob/common.js

@@ -0,0 +1,238 @@
+exports.setopts = setopts
+exports.ownProp = ownProp
+exports.makeAbs = makeAbs
+exports.finish = finish
+exports.mark = mark
+exports.isIgnored = isIgnored
+exports.childrenIgnored = childrenIgnored
+
+function ownProp (obj, field) {
+  return Object.prototype.hasOwnProperty.call(obj, field)
+}
+
+var fs = require("fs")
+var path = require("path")
+var minimatch = require("minimatch")
+var isAbsolute = require("path-is-absolute")
+var Minimatch = minimatch.Minimatch
+
+function alphasort (a, b) {
+  return a.localeCompare(b, 'en')
+}
+
+function setupIgnores (self, options) {
+  self.ignore = options.ignore || []
+
+  if (!Array.isArray(self.ignore))
+    self.ignore = [self.ignore]
+
+  if (self.ignore.length) {
+    self.ignore = self.ignore.map(ignoreMap)
+  }
+}
+
+// ignore patterns are always in dot:true mode.
+function ignoreMap (pattern) {
+  var gmatcher = null
+  if (pattern.slice(-3) === '/**') {
+    var gpattern = pattern.replace(/(\/\*\*)+$/, '')
+    gmatcher = new Minimatch(gpattern, { dot: true })
+  }
+
+  return {
+    matcher: new Minimatch(pattern, { dot: true }),
+    gmatcher: gmatcher
+  }
+}
+
+function setopts (self, pattern, options) {
+  if (!options)
+    options = {}
+
+  // base-matching: just use globstar for that.
+  if (options.matchBase && -1 === pattern.indexOf("/")) {
+    if (options.noglobstar) {
+      throw new Error("base matching requires globstar")
+    }
+    pattern = "**/" + pattern
+  }
+
+  self.silent = !!options.silent
+  self.pattern = pattern
+  self.strict = options.strict !== false
+  self.realpath = !!options.realpath
+  self.realpathCache = options.realpathCache || Object.create(null)
+  self.follow = !!options.follow
+  self.dot = !!options.dot
+  self.mark = !!options.mark
+  self.nodir = !!options.nodir
+  if (self.nodir)
+    self.mark = true
+  self.sync = !!options.sync
+  self.nounique = !!options.nounique
+  self.nonull = !!options.nonull
+  self.nosort = !!options.nosort
+  self.nocase = !!options.nocase
+  self.stat = !!options.stat
+  self.noprocess = !!options.noprocess
+  self.absolute = !!options.absolute
+  self.fs = options.fs || fs
+
+  self.maxLength = options.maxLength || Infinity
+  self.cache = options.cache || Object.create(null)
+  self.statCache = options.statCache || Object.create(null)
+  self.symlinks = options.symlinks || Object.create(null)
+
+  setupIgnores(self, options)
+
+  self.changedCwd = false
+  var cwd = process.cwd()
+  if (!ownProp(options, "cwd"))
+    self.cwd = cwd
+  else {
+    self.cwd = path.resolve(options.cwd)
+    self.changedCwd = self.cwd !== cwd
+  }
+
+  self.root = options.root || path.resolve(self.cwd, "/")
+  self.root = path.resolve(self.root)
+  if (process.platform === "win32")
+    self.root = self.root.replace(/\\/g, "/")
+
+  // TODO: is an absolute `cwd` supposed to be resolved against `root`?
+  // e.g. { cwd: '/test', root: __dirname } === path.join(__dirname, '/test')
+  self.cwdAbs = isAbsolute(self.cwd) ? self.cwd : makeAbs(self, self.cwd)
+  if (process.platform === "win32")
+    self.cwdAbs = self.cwdAbs.replace(/\\/g, "/")
+  self.nomount = !!options.nomount
+
+  // disable comments and negation in Minimatch.
+  // Note that they are not supported in Glob itself anyway.
+  options.nonegate = true
+  options.nocomment = true
+  // always treat \ in patterns as escapes, not path separators
+  options.allowWindowsEscape = false
+
+  self.minimatch = new Minimatch(pattern, options)
+  self.options = self.minimatch.options
+}
+
+function finish (self) {
+  var nou = self.nounique
+  var all = nou ? [] : Object.create(null)
+
+  for (var i = 0, l = self.matches.length; i < l; i ++) {
+    var matches = self.matches[i]
+    if (!matches || Object.keys(matches).length === 0) {
+      if (self.nonull) {
+        // do like the shell, and spit out the literal glob
+        var literal = self.minimatch.globSet[i]
+        if (nou)
+          all.push(literal)
+        else
+          all[literal] = true
+      }
+    } else {
+      // had matches
+      var m = Object.keys(matches)
+      if (nou)
+        all.push.apply(all, m)
+      else
+        m.forEach(function (m) {
+          all[m] = true
+        })
+    }
+  }
+
+  if (!nou)
+    all = Object.keys(all)
+
+  if (!self.nosort)
+    all = all.sort(alphasort)
+
+  // at *some* point we statted all of these
+  if (self.mark) {
+    for (var i = 0; i < all.length; i++) {
+      all[i] = self._mark(all[i])
+    }
+    if (self.nodir) {
+      all = all.filter(function (e) {
+        var notDir = !(/\/$/.test(e))
+        var c = self.cache[e] || self.cache[makeAbs(self, e)]
+        if (notDir && c)
+          notDir = c !== 'DIR' && !Array.isArray(c)
+        return notDir
+      })
+    }
+  }
+
+  if (self.ignore.length)
+    all = all.filter(function(m) {
+      return !isIgnored(self, m)
+    })
+
+  self.found = all
+}
+
+function mark (self, p) {
+  var abs = makeAbs(self, p)
+  var c = self.cache[abs]
+  var m = p
+  if (c) {
+    var isDir = c === 'DIR' || Array.isArray(c)
+    var slash = p.slice(-1) === '/'
+
+    if (isDir && !slash)
+      m += '/'
+    else if (!isDir && slash)
+      m = m.slice(0, -1)
+
+    if (m !== p) {
+      var mabs = makeAbs(self, m)
+      self.statCache[mabs] = self.statCache[abs]
+      self.cache[mabs] = self.cache[abs]
+    }
+  }
+
+  return m
+}
+
+// lotta situps...
+function makeAbs (self, f) {
+  var abs = f
+  if (f.charAt(0) === '/') {
+    abs = path.join(self.root, f)
+  } else if (isAbsolute(f) || f === '') {
+    abs = f
+  } else if (self.changedCwd) {
+    abs = path.resolve(self.cwd, f)
+  } else {
+    abs = path.resolve(f)
+  }
+
+  if (process.platform === 'win32')
+    abs = abs.replace(/\\/g, '/')
+
+  return abs
+}
+
+
+// Return true, if pattern ends with globstar '**', for the accompanying parent directory.
+// Ex:- If node_modules/** is the pattern, add 'node_modules' to ignore list along with it's contents
+function isIgnored (self, path) {
+  if (!self.ignore.length)
+    return false
+
+  return self.ignore.some(function(item) {
+    return item.matcher.match(path) || !!(item.gmatcher && item.gmatcher.match(path))
+  })
+}
+
+function childrenIgnored (self, path) {
+  if (!self.ignore.length)
+    return false
+
+  return self.ignore.some(function(item) {
+    return !!(item.gmatcher && item.gmatcher.match(path))
+  })
+}

server/node_modules/broadcast-channel/node_modules/glob/glob.js

@@ -0,0 +1,790 @@
+// Approach:
+//
+// 1. Get the minimatch set
+// 2. For each pattern in the set, PROCESS(pattern, false)
+// 3. Store matches per-set, then uniq them
+//
+// PROCESS(pattern, inGlobStar)
+// Get the first [n] items from pattern that are all strings
+// Join these together.  This is PREFIX.
+//   If there is no more remaining, then stat(PREFIX) and
+//   add to matches if it succeeds.  END.
+//
+// If inGlobStar and PREFIX is symlink and points to dir
+//   set ENTRIES = []
+// else readdir(PREFIX) as ENTRIES
+//   If fail, END
+//
+// with ENTRIES
+//   If pattern[n] is GLOBSTAR
+//     // handle the case where the globstar match is empty
+//     // by pruning it out, and testing the resulting pattern
+//     PROCESS(pattern[0..n] + pattern[n+1 .. $], false)
+//     // handle other cases.
+//     for ENTRY in ENTRIES (not dotfiles)
+//       // attach globstar + tail onto the entry
+//       // Mark that this entry is a globstar match
+//       PROCESS(pattern[0..n] + ENTRY + pattern[n .. $], true)
+//
+//   else // not globstar
+//     for ENTRY in ENTRIES (not dotfiles, unless pattern[n] is dot)
+//       Test ENTRY against pattern[n]
+//       If fails, continue
+//       If passes, PROCESS(pattern[0..n] + item + pattern[n+1 .. $])
+//
+// Caveat:
+//   Cache all stats and readdirs results to minimize syscall.  Since all
+//   we ever care about is existence and directory-ness, we can just keep
+//   `true` for files, and [children,...] for directories, or `false` for
+//   things that don't exist.
+
+module.exports = glob
+
+var rp = require('fs.realpath')
+var minimatch = require('minimatch')
+var Minimatch = minimatch.Minimatch
+var inherits = require('inherits')
+var EE = require('events').EventEmitter
+var path = require('path')
+var assert = require('assert')
+var isAbsolute = require('path-is-absolute')
+var globSync = require('./sync.js')
+var common = require('./common.js')
+var setopts = common.setopts
+var ownProp = common.ownProp
+var inflight = require('inflight')
+var util = require('util')
+var childrenIgnored = common.childrenIgnored
+var isIgnored = common.isIgnored
+
+var once = require('once')
+
+function glob (pattern, options, cb) {
+  if (typeof options === 'function') cb = options, options = {}
+  if (!options) options = {}
+
+  if (options.sync) {
+    if (cb)
+      throw new TypeError('callback provided to sync glob')
+    return globSync(pattern, options)
+  }
+
+  return new Glob(pattern, options, cb)
+}
+
+glob.sync = globSync
+var GlobSync = glob.GlobSync = globSync.GlobSync
+
+// old api surface
+glob.glob = glob
+
+function extend (origin, add) {
+  if (add === null || typeof add !== 'object') {
+    return origin
+  }
+
+  var keys = Object.keys(add)
+  var i = keys.length
+  while (i--) {
+    origin[keys[i]] = add[keys[i]]
+  }
+  return origin
+}
+
+glob.hasMagic = function (pattern, options_) {
+  var options = extend({}, options_)
+  options.noprocess = true
+
+  var g = new Glob(pattern, options)
+  var set = g.minimatch.set
+
+  if (!pattern)
+    return false
+
+  if (set.length > 1)
+    return true
+
+  for (var j = 0; j < set[0].length; j++) {
+    if (typeof set[0][j] !== 'string')
+      return true
+  }
+
+  return false
+}
+
+glob.Glob = Glob
+inherits(Glob, EE)
+function Glob (pattern, options, cb) {
+  if (typeof options === 'function') {
+    cb = options
+    options = null
+  }
+
+  if (options && options.sync) {
+    if (cb)
+      throw new TypeError('callback provided to sync glob')
+    return new GlobSync(pattern, options)
+  }
+
+  if (!(this instanceof Glob))
+    return new Glob(pattern, options, cb)
+
+  setopts(this, pattern, options)
+  this._didRealPath = false
+
+  // process each pattern in the minimatch set
+  var n = this.minimatch.set.length
+
+  // The matches are stored as {<filename>: true,...} so that
+  // duplicates are automagically pruned.
+  // Later, we do an Object.keys() on these.
+  // Keep them as a list so we can fill in when nonull is set.
+  this.matches = new Array(n)
+
+  if (typeof cb === 'function') {
+    cb = once(cb)
+    this.on('error', cb)
+    this.on('end', function (matches) {
+      cb(null, matches)
+    })
+  }
+
+  var self = this
+  this._processing = 0
+
+  this._emitQueue = []
+  this._processQueue = []
+  this.paused = false
+
+  if (this.noprocess)
+    return this
+
+  if (n === 0)
+    return done()
+
+  var sync = true
+  for (var i = 0; i < n; i ++) {
+    this._process(this.minimatch.set[i], i, false, done)
+  }
+  sync = false
+
+  function done () {
+    --self._processing
+    if (self._processing <= 0) {
+      if (sync) {
+        process.nextTick(function () {
+          self._finish()
+        })
+      } else {
+        self._finish()
+      }
+    }
+  }
+}
+
+Glob.prototype._finish = function () {
+  assert(this instanceof Glob)
+  if (this.aborted)
+    return
+
+  if (this.realpath && !this._didRealpath)
+    return this._realpath()
+
+  common.finish(this)
+  this.emit('end', this.found)
+}
+
+Glob.prototype._realpath = function () {
+  if (this._didRealpath)
+    return
+
+  this._didRealpath = true
+
+  var n = this.matches.length
+  if (n === 0)
+    return this._finish()
+
+  var self = this
+  for (var i = 0; i < this.matches.length; i++)
+    this._realpathSet(i, next)
+
+  function next () {
+    if (--n === 0)
+      self._finish()
+  }
+}
+
+Glob.prototype._realpathSet = function (index, cb) {
+  var matchset = this.matches[index]
+  if (!matchset)
+    return cb()
+
+  var found = Object.keys(matchset)
+  var self = this
+  var n = found.length
+
+  if (n === 0)
+    return cb()
+
+  var set = this.matches[index] = Object.create(null)
+  found.forEach(function (p, i) {
+    // If there's a problem with the stat, then it means that
+    // one or more of the links in the realpath couldn't be
+    // resolved.  just return the abs value in that case.
+    p = self._makeAbs(p)
+    rp.realpath(p, self.realpathCache, function (er, real) {
+      if (!er)
+        set[real] = true
+      else if (er.syscall === 'stat')
+        set[p] = true
+      else
+        self.emit('error', er) // srsly wtf right here
+
+      if (--n === 0) {
+        self.matches[index] = set
+        cb()
+      }
+    })
+  })
+}
+
+Glob.prototype._mark = function (p) {
+  return common.mark(this, p)
+}
+
+Glob.prototype._makeAbs = function (f) {
+  return common.makeAbs(this, f)
+}
+
+Glob.prototype.abort = function () {
+  this.aborted = true
+  this.emit('abort')
+}
+
+Glob.prototype.pause = function () {
+  if (!this.paused) {
+    this.paused = true
+    this.emit('pause')
+  }
+}
+
+Glob.prototype.resume = function () {
+  if (this.paused) {
+    this.emit('resume')
+    this.paused = false
+    if (this._emitQueue.length) {
+      var eq = this._emitQueue.slice(0)
+      this._emitQueue.length = 0
+      for (var i = 0; i < eq.length; i ++) {
+        var e = eq[i]
+        this._emitMatch(e[0], e[1])
+      }
+    }
+    if (this._processQueue.length) {
+      var pq = this._processQueue.slice(0)
+      this._processQueue.length = 0
+      for (var i = 0; i < pq.length; i ++) {
+        var p = pq[i]
+        this._processing--
+        this._process(p[0], p[1], p[2], p[3])
+      }
+    }
+  }
+}
+
+Glob.prototype._process = function (pattern, index, inGlobStar, cb) {
+  assert(this instanceof Glob)
+  assert(typeof cb === 'function')
+
+  if (this.aborted)
+    return
+
+  this._processing++
+  if (this.paused) {
+    this._processQueue.push([pattern, index, inGlobStar, cb])
+    return
+  }
+
+  //console.error('PROCESS %d', this._processing, pattern)
+
+  // Get the first [n] parts of pattern that are all strings.
+  var n = 0
+  while (typeof pattern[n] === 'string') {
+    n ++
+  }
+  // now n is the index of the first one that is *not* a string.
+
+  // see if there's anything else
+  var prefix
+  switch (n) {
+    // if not, then this is rather simple
+    case pattern.length:
+      this._processSimple(pattern.join('/'), index, cb)
+      return
+
+    case 0:
+      // pattern *starts* with some non-trivial item.
+      // going to readdir(cwd), but not include the prefix in matches.
+      prefix = null
+      break
+
+    default:
+      // pattern has some string bits in the front.
+      // whatever it starts with, whether that's 'absolute' like /foo/bar,
+      // or 'relative' like '../baz'
+      prefix = pattern.slice(0, n).join('/')
+      break
+  }
+
+  var remain = pattern.slice(n)
+
+  // get the list of entries.
+  var read
+  if (prefix === null)
+    read = '.'
+  else if (isAbsolute(prefix) ||
+      isAbsolute(pattern.map(function (p) {
+        return typeof p === 'string' ? p : '[*]'
+      }).join('/'))) {
+    if (!prefix || !isAbsolute(prefix))
+      prefix = '/' + prefix
+    read = prefix
+  } else
+    read = prefix
+
+  var abs = this._makeAbs(read)
+
+  //if ignored, skip _processing
+  if (childrenIgnored(this, read))
+    return cb()
+
+  var isGlobStar = remain[0] === minimatch.GLOBSTAR
+  if (isGlobStar)
+    this._processGlobStar(prefix, read, abs, remain, index, inGlobStar, cb)
+  else
+    this._processReaddir(prefix, read, abs, remain, index, inGlobStar, cb)
+}
+
+Glob.prototype._processReaddir = function (prefix, read, abs, remain, index, inGlobStar, cb) {
+  var self = this
+  this._readdir(abs, inGlobStar, function (er, entries) {
+    return self._processReaddir2(prefix, read, abs, remain, index, inGlobStar, entries, cb)
+  })
+}
+
+Glob.prototype._processReaddir2 = function (prefix, read, abs, remain, index, inGlobStar, entries, cb) {
+
+  // if the abs isn't a dir, then nothing can match!
+  if (!entries)
+    return cb()
+
+  // It will only match dot entries if it starts with a dot, or if
+  // dot is set.  Stuff like @(.foo|.bar) isn't allowed.
+  var pn = remain[0]
+  var negate = !!this.minimatch.negate
+  var rawGlob = pn._glob
+  var dotOk = this.dot || rawGlob.charAt(0) === '.'
+
+  var matchedEntries = []
+  for (var i = 0; i < entries.length; i++) {
+    var e = entries[i]
+    if (e.charAt(0) !== '.' || dotOk) {
+      var m
+      if (negate && !prefix) {
+        m = !e.match(pn)
+      } else {
+        m = e.match(pn)
+      }
+      if (m)
+        matchedEntries.push(e)
+    }
+  }
+
+  //console.error('prd2', prefix, entries, remain[0]._glob, matchedEntries)
+
+  var len = matchedEntries.length
+  // If there are no matched entries, then nothing matches.
+  if (len === 0)
+    return cb()
+
+  // if this is the last remaining pattern bit, then no need for
+  // an additional stat *unless* the user has specified mark or
+  // stat explicitly.  We know they exist, since readdir returned
+  // them.
+
+  if (remain.length === 1 && !this.mark && !this.stat) {
+    if (!this.matches[index])
+      this.matches[index] = Object.create(null)
+
+    for (var i = 0; i < len; i ++) {
+      var e = matchedEntries[i]
+      if (prefix) {
+        if (prefix !== '/')
+          e = prefix + '/' + e
+        else
+          e = prefix + e
+      }
+
+      if (e.charAt(0) === '/' && !this.nomount) {
+        e = path.join(this.root, e)
+      }
+      this._emitMatch(index, e)
+    }
+    // This was the last one, and no stats were needed
+    return cb()
+  }
+
+  // now test all matched entries as stand-ins for that part
+  // of the pattern.
+  remain.shift()
+  for (var i = 0; i < len; i ++) {
+    var e = matchedEntries[i]
+    var newPattern
+    if (prefix) {
+      if (prefix !== '/')
+        e = prefix + '/' + e
+      else
+        e = prefix + e
+    }
+    this._process([e].concat(remain), index, inGlobStar, cb)
+  }
+  cb()
+}
+
+Glob.prototype._emitMatch = function (index, e) {
+  if (this.aborted)
+    return
+
+  if (isIgnored(this, e))
+    return
+
+  if (this.paused) {
+    this._emitQueue.push([index, e])
+    return
+  }
+
+  var abs = isAbsolute(e) ? e : this._makeAbs(e)
+
+  if (this.mark)
+    e = this._mark(e)
+
+  if (this.absolute)
+    e = abs
+
+  if (this.matches[index][e])
+    return
+
+  if (this.nodir) {
+    var c = this.cache[abs]
+    if (c === 'DIR' || Array.isArray(c))
+      return
+  }
+
+  this.matches[index][e] = true
+
+  var st = this.statCache[abs]
+  if (st)
+    this.emit('stat', e, st)
+
+  this.emit('match', e)
+}
+
+Glob.prototype._readdirInGlobStar = function (abs, cb) {
+  if (this.aborted)
+    return
+
+  // follow all symlinked directories forever
+  // just proceed as if this is a non-globstar situation
+  if (this.follow)
+    return this._readdir(abs, false, cb)
+
+  var lstatkey = 'lstat\0' + abs
+  var self = this
+  var lstatcb = inflight(lstatkey, lstatcb_)
+
+  if (lstatcb)
+    self.fs.lstat(abs, lstatcb)
+
+  function lstatcb_ (er, lstat) {
+    if (er && er.code === 'ENOENT')
+      return cb()
+
+    var isSym = lstat && lstat.isSymbolicLink()
+    self.symlinks[abs] = isSym
+
+    // If it's not a symlink or a dir, then it's definitely a regular file.
+    // don't bother doing a readdir in that case.
+    if (!isSym && lstat && !lstat.isDirectory()) {
+      self.cache[abs] = 'FILE'
+      cb()
+    } else
+      self._readdir(abs, false, cb)
+  }
+}
+
+Glob.prototype._readdir = function (abs, inGlobStar, cb) {
+  if (this.aborted)
+    return
+
+  cb = inflight('readdir\0'+abs+'\0'+inGlobStar, cb)
+  if (!cb)
+    return
+
+  //console.error('RD %j %j', +inGlobStar, abs)
+  if (inGlobStar && !ownProp(this.symlinks, abs))
+    return this._readdirInGlobStar(abs, cb)
+
+  if (ownProp(this.cache, abs)) {
+    var c = this.cache[abs]
+    if (!c || c === 'FILE')
+      return cb()
+
+    if (Array.isArray(c))
+      return cb(null, c)
+  }
+
+  var self = this
+  self.fs.readdir(abs, readdirCb(this, abs, cb))
+}
+
+function readdirCb (self, abs, cb) {
+  return function (er, entries) {
+    if (er)
+      self._readdirError(abs, er, cb)
+    else
+      self._readdirEntries(abs, entries, cb)
+  }
+}
+
+Glob.prototype._readdirEntries = function (abs, entries, cb) {
+  if (this.aborted)
+    return
+
+  // if we haven't asked to stat everything, then just
+  // assume that everything in there exists, so we can avoid
+  // having to stat it a second time.
+  if (!this.mark && !this.stat) {
+    for (var i = 0; i < entries.length; i ++) {
+      var e = entries[i]
+      if (abs === '/')
+        e = abs + e
+      else
+        e = abs + '/' + e
+      this.cache[e] = true
+    }
+  }
+
+  this.cache[abs] = entries
+  return cb(null, entries)
+}
+
+Glob.prototype._readdirError = function (f, er, cb) {
+  if (this.aborted)
+    return
+
+  // handle errors, and cache the information
+  switch (er.code) {
+    case 'ENOTSUP': // https://github.com/isaacs/node-glob/issues/205
+    case 'ENOTDIR': // totally normal. means it *does* exist.
+      var abs = this._makeAbs(f)
+      this.cache[abs] = 'FILE'
+      if (abs === this.cwdAbs) {
+        var error = new Error(er.code + ' invalid cwd ' + this.cwd)
+        error.path = this.cwd
+        error.code = er.code
+        this.emit('error', error)
+        this.abort()
+      }
+      break
+
+    case 'ENOENT': // not terribly unusual
+    case 'ELOOP':
+    case 'ENAMETOOLONG':
+    case 'UNKNOWN':
+      this.cache[this._makeAbs(f)] = false
+      break
+
+    default: // some unusual error.  Treat as failure.
+      this.cache[this._makeAbs(f)] = false
+      if (this.strict) {
+        this.emit('error', er)
+        // If the error is handled, then we abort
+        // if not, we threw out of here
+        this.abort()
+      }
+      if (!this.silent)
+        console.error('glob error', er)
+      break
+  }
+
+  return cb()
+}
+
+Glob.prototype._processGlobStar = function (prefix, read, abs, remain, index, inGlobStar, cb) {
+  var self = this
+  this._readdir(abs, inGlobStar, function (er, entries) {
+    self._processGlobStar2(prefix, read, abs, remain, index, inGlobStar, entries, cb)
+  })
+}
+
+
+Glob.prototype._processGlobStar2 = function (prefix, read, abs, remain, index, inGlobStar, entries, cb) {
+  //console.error('pgs2', prefix, remain[0], entries)
+
+  // no entries means not a dir, so it can never have matches
+  // foo.txt/** doesn't match foo.txt
+  if (!entries)
+    return cb()
+
+  // test without the globstar, and with every child both below
+  // and replacing the globstar.
+  var remainWithoutGlobStar = remain.slice(1)
+  var gspref = prefix ? [ prefix ] : []
+  var noGlobStar = gspref.concat(remainWithoutGlobStar)
+
+  // the noGlobStar pattern exits the inGlobStar state
+  this._process(noGlobStar, index, false, cb)
+
+  var isSym = this.symlinks[abs]
+  var len = entries.length
+
+  // If it's a symlink, and we're in a globstar, then stop
+  if (isSym && inGlobStar)
+    return cb()
+
+  for (var i = 0; i < len; i++) {
+    var e = entries[i]
+    if (e.charAt(0) === '.' && !this.dot)
+      continue
+
+    // these two cases enter the inGlobStar state
+    var instead = gspref.concat(entries[i], remainWithoutGlobStar)
+    this._process(instead, index, true, cb)
+
+    var below = gspref.concat(entries[i], remain)
+    this._process(below, index, true, cb)
+  }
+
+  cb()
+}
+
+Glob.prototype._processSimple = function (prefix, index, cb) {
+  // XXX review this.  Shouldn't it be doing the mounting etc
+  // before doing stat?  kinda weird?
+  var self = this
+  this._stat(prefix, function (er, exists) {
+    self._processSimple2(prefix, index, er, exists, cb)
+  })
+}
+Glob.prototype._processSimple2 = function (prefix, index, er, exists, cb) {
+
+  //console.error('ps2', prefix, exists)
+
+  if (!this.matches[index])
+    this.matches[index] = Object.create(null)
+
+  // If it doesn't exist, then just mark the lack of results
+  if (!exists)
+    return cb()
+
+  if (prefix && isAbsolute(prefix) && !this.nomount) {
+    var trail = /[\/\\]$/.test(prefix)
+    if (prefix.charAt(0) === '/') {
+      prefix = path.join(this.root, prefix)
+    } else {
+      prefix = path.resolve(this.root, prefix)
+      if (trail)
+        prefix += '/'
+    }
+  }
+
+  if (process.platform === 'win32')
+    prefix = prefix.replace(/\\/g, '/')
+
+  // Mark this as a match
+  this._emitMatch(index, prefix)
+  cb()
+}
+
+// Returns either 'DIR', 'FILE', or false
+Glob.prototype._stat = function (f, cb) {
+  var abs = this._makeAbs(f)
+  var needDir = f.slice(-1) === '/'
+
+  if (f.length > this.maxLength)
+    return cb()
+
+  if (!this.stat && ownProp(this.cache, abs)) {
+    var c = this.cache[abs]
+
+    if (Array.isArray(c))
+      c = 'DIR'
+
+    // It exists, but maybe not how we need it
+    if (!needDir || c === 'DIR')
+      return cb(null, c)
+
+    if (needDir && c === 'FILE')
+      return cb()
+
+    // otherwise we have to stat, because maybe c=true
+    // if we know it exists, but not what it is.
+  }
+
+  var exists
+  var stat = this.statCache[abs]
+  if (stat !== undefined) {
+    if (stat === false)
+      return cb(null, stat)
+    else {
+      var type = stat.isDirectory() ? 'DIR' : 'FILE'
+      if (needDir && type === 'FILE')
+        return cb()
+      else
+        return cb(null, type, stat)
+    }
+  }
+
+  var self = this
+  var statcb = inflight('stat\0' + abs, lstatcb_)
+  if (statcb)
+    self.fs.lstat(abs, statcb)
+
+  function lstatcb_ (er, lstat) {
+    if (lstat && lstat.isSymbolicLink()) {
+      // If it's a symlink, then treat it as the target, unless
+      // the target does not exist, then treat it as a file.
+      return self.fs.stat(abs, function (er, stat) {
+        if (er)
+          self._stat2(f, abs, null, lstat, cb)
+        else
+          self._stat2(f, abs, er, stat, cb)
+      })
+    } else {
+      self._stat2(f, abs, er, lstat, cb)
+    }
+  }
+}
+
+Glob.prototype._stat2 = function (f, abs, er, stat, cb) {
+  if (er && (er.code === 'ENOENT' || er.code === 'ENOTDIR')) {
+    this.statCache[abs] = false
+    return cb()
+  }
+
+  var needDir = f.slice(-1) === '/'
+  this.statCache[abs] = stat
+
+  if (abs.slice(-1) === '/' && stat && !stat.isDirectory())
+    return cb(null, false, stat)
+
+  var c = true
+  if (stat)
+    c = stat.isDirectory() ? 'DIR' : 'FILE'
+  this.cache[abs] = this.cache[abs] || c
+
+  if (needDir && c === 'FILE')
+    return cb()
+
+  return cb(null, c, stat)
+}

server/node_modules/broadcast-channel/node_modules/glob/package.json

@@ -0,0 +1,55 @@
+{
+  "author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me/)",
+  "name": "glob",
+  "description": "a little globber",
+  "version": "7.2.3",
+  "publishConfig": {
+    "tag": "v7-legacy"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/node-glob.git"
+  },
+  "main": "glob.js",
+  "files": [
+    "glob.js",
+    "sync.js",
+    "common.js"
+  ],
+  "engines": {
+    "node": "*"
+  },
+  "dependencies": {
+    "fs.realpath": "^1.0.0",
+    "inflight": "^1.0.4",
+    "inherits": "2",
+    "minimatch": "^3.1.1",
+    "once": "^1.3.0",
+    "path-is-absolute": "^1.0.0"
+  },
+  "devDependencies": {
+    "memfs": "^3.2.0",
+    "mkdirp": "0",
+    "rimraf": "^2.2.8",
+    "tap": "^15.0.6",
+    "tick": "0.0.6"
+  },
+  "tap": {
+    "before": "test/00-setup.js",
+    "after": "test/zz-cleanup.js",
+    "jobs": 1
+  },
+  "scripts": {
+    "prepublish": "npm run benchclean",
+    "profclean": "rm -f v8.log profile.txt",
+    "test": "tap",
+    "test-regen": "npm run profclean && TEST_REGEN=1 node test/00-setup.js",
+    "bench": "bash benchmark.sh",
+    "prof": "bash prof.sh && cat profile.txt",
+    "benchclean": "node benchclean.js"
+  },
+  "license": "ISC",
+  "funding": {
+    "url": "https://github.com/sponsors/isaacs"
+  }
+}

server/node_modules/broadcast-channel/node_modules/glob/sync.js

@@ -0,0 +1,486 @@
+module.exports = globSync
+globSync.GlobSync = GlobSync
+
+var rp = require('fs.realpath')
+var minimatch = require('minimatch')
+var Minimatch = minimatch.Minimatch
+var Glob = require('./glob.js').Glob
+var util = require('util')
+var path = require('path')
+var assert = require('assert')
+var isAbsolute = require('path-is-absolute')
+var common = require('./common.js')
+var setopts = common.setopts
+var ownProp = common.ownProp
+var childrenIgnored = common.childrenIgnored
+var isIgnored = common.isIgnored
+
+function globSync (pattern, options) {
+  if (typeof options === 'function' || arguments.length === 3)
+    throw new TypeError('callback provided to sync glob\n'+
+                        'See: https://github.com/isaacs/node-glob/issues/167')
+
+  return new GlobSync(pattern, options).found
+}
+
+function GlobSync (pattern, options) {
+  if (!pattern)
+    throw new Error('must provide pattern')
+
+  if (typeof options === 'function' || arguments.length === 3)
+    throw new TypeError('callback provided to sync glob\n'+
+                        'See: https://github.com/isaacs/node-glob/issues/167')
+
+  if (!(this instanceof GlobSync))
+    return new GlobSync(pattern, options)
+
+  setopts(this, pattern, options)
+
+  if (this.noprocess)
+    return this
+
+  var n = this.minimatch.set.length
+  this.matches = new Array(n)
+  for (var i = 0; i < n; i ++) {
+    this._process(this.minimatch.set[i], i, false)
+  }
+  this._finish()
+}
+
+GlobSync.prototype._finish = function () {
+  assert.ok(this instanceof GlobSync)
+  if (this.realpath) {
+    var self = this
+    this.matches.forEach(function (matchset, index) {
+      var set = self.matches[index] = Object.create(null)
+      for (var p in matchset) {
+        try {
+          p = self._makeAbs(p)
+          var real = rp.realpathSync(p, self.realpathCache)
+          set[real] = true
+        } catch (er) {
+          if (er.syscall === 'stat')
+            set[self._makeAbs(p)] = true
+          else
+            throw er
+        }
+      }
+    })
+  }
+  common.finish(this)
+}
+
+
+GlobSync.prototype._process = function (pattern, index, inGlobStar) {
+  assert.ok(this instanceof GlobSync)
+
+  // Get the first [n] parts of pattern that are all strings.
+  var n = 0
+  while (typeof pattern[n] === 'string') {
+    n ++
+  }
+  // now n is the index of the first one that is *not* a string.
+
+  // See if there's anything else
+  var prefix
+  switch (n) {
+    // if not, then this is rather simple
+    case pattern.length:
+      this._processSimple(pattern.join('/'), index)
+      return
+
+    case 0:
+      // pattern *starts* with some non-trivial item.
+      // going to readdir(cwd), but not include the prefix in matches.
+      prefix = null
+      break
+
+    default:
+      // pattern has some string bits in the front.
+      // whatever it starts with, whether that's 'absolute' like /foo/bar,
+      // or 'relative' like '../baz'
+      prefix = pattern.slice(0, n).join('/')
+      break
+  }
+
+  var remain = pattern.slice(n)
+
+  // get the list of entries.
+  var read
+  if (prefix === null)
+    read = '.'
+  else if (isAbsolute(prefix) ||
+      isAbsolute(pattern.map(function (p) {
+        return typeof p === 'string' ? p : '[*]'
+      }).join('/'))) {
+    if (!prefix || !isAbsolute(prefix))
+      prefix = '/' + prefix
+    read = prefix
+  } else
+    read = prefix
+
+  var abs = this._makeAbs(read)
+
+  //if ignored, skip processing
+  if (childrenIgnored(this, read))
+    return
+
+  var isGlobStar = remain[0] === minimatch.GLOBSTAR
+  if (isGlobStar)
+    this._processGlobStar(prefix, read, abs, remain, index, inGlobStar)
+  else
+    this._processReaddir(prefix, read, abs, remain, index, inGlobStar)
+}
+
+
+GlobSync.prototype._processReaddir = function (prefix, read, abs, remain, index, inGlobStar) {
+  var entries = this._readdir(abs, inGlobStar)
+
+  // if the abs isn't a dir, then nothing can match!
+  if (!entries)
+    return
+
+  // It will only match dot entries if it starts with a dot, or if
+  // dot is set.  Stuff like @(.foo|.bar) isn't allowed.
+  var pn = remain[0]
+  var negate = !!this.minimatch.negate
+  var rawGlob = pn._glob
+  var dotOk = this.dot || rawGlob.charAt(0) === '.'
+
+  var matchedEntries = []
+  for (var i = 0; i < entries.length; i++) {
+    var e = entries[i]
+    if (e.charAt(0) !== '.' || dotOk) {
+      var m
+      if (negate && !prefix) {
+        m = !e.match(pn)
+      } else {
+        m = e.match(pn)
+      }
+      if (m)
+        matchedEntries.push(e)
+    }
+  }
+
+  var len = matchedEntries.length
+  // If there are no matched entries, then nothing matches.
+  if (len === 0)
+    return
+
+  // if this is the last remaining pattern bit, then no need for
+  // an additional stat *unless* the user has specified mark or
+  // stat explicitly.  We know they exist, since readdir returned
+  // them.
+
+  if (remain.length === 1 && !this.mark && !this.stat) {
+    if (!this.matches[index])
+      this.matches[index] = Object.create(null)
+
+    for (var i = 0; i < len; i ++) {
+      var e = matchedEntries[i]
+      if (prefix) {
+        if (prefix.slice(-1) !== '/')
+          e = prefix + '/' + e
+        else
+          e = prefix + e
+      }
+
+      if (e.charAt(0) === '/' && !this.nomount) {
+        e = path.join(this.root, e)
+      }
+      this._emitMatch(index, e)
+    }
+    // This was the last one, and no stats were needed
+    return
+  }
+
+  // now test all matched entries as stand-ins for that part
+  // of the pattern.
+  remain.shift()
+  for (var i = 0; i < len; i ++) {
+    var e = matchedEntries[i]
+    var newPattern
+    if (prefix)
+      newPattern = [prefix, e]
+    else
+      newPattern = [e]
+    this._process(newPattern.concat(remain), index, inGlobStar)
+  }
+}
+
+
+GlobSync.prototype._emitMatch = function (index, e) {
+  if (isIgnored(this, e))
+    return
+
+  var abs = this._makeAbs(e)
+
+  if (this.mark)
+    e = this._mark(e)
+
+  if (this.absolute) {
+    e = abs
+  }
+
+  if (this.matches[index][e])
+    return
+
+  if (this.nodir) {
+    var c = this.cache[abs]
+    if (c === 'DIR' || Array.isArray(c))
+      return
+  }
+
+  this.matches[index][e] = true
+
+  if (this.stat)
+    this._stat(e)
+}
+
+
+GlobSync.prototype._readdirInGlobStar = function (abs) {
+  // follow all symlinked directories forever
+  // just proceed as if this is a non-globstar situation
+  if (this.follow)
+    return this._readdir(abs, false)
+
+  var entries
+  var lstat
+  var stat
+  try {
+    lstat = this.fs.lstatSync(abs)
+  } catch (er) {
+    if (er.code === 'ENOENT') {
+      // lstat failed, doesn't exist
+      return null
+    }
+  }
+
+  var isSym = lstat && lstat.isSymbolicLink()
+  this.symlinks[abs] = isSym
+
+  // If it's not a symlink or a dir, then it's definitely a regular file.
+  // don't bother doing a readdir in that case.
+  if (!isSym && lstat && !lstat.isDirectory())
+    this.cache[abs] = 'FILE'
+  else
+    entries = this._readdir(abs, false)
+
+  return entries
+}
+
+GlobSync.prototype._readdir = function (abs, inGlobStar) {
+  var entries
+
+  if (inGlobStar && !ownProp(this.symlinks, abs))
+    return this._readdirInGlobStar(abs)
+
+  if (ownProp(this.cache, abs)) {
+    var c = this.cache[abs]
+    if (!c || c === 'FILE')
+      return null
+
+    if (Array.isArray(c))
+      return c
+  }
+
+  try {
+    return this._readdirEntries(abs, this.fs.readdirSync(abs))
+  } catch (er) {
+    this._readdirError(abs, er)
+    return null
+  }
+}
+
+GlobSync.prototype._readdirEntries = function (abs, entries) {
+  // if we haven't asked to stat everything, then just
+  // assume that everything in there exists, so we can avoid
+  // having to stat it a second time.
+  if (!this.mark && !this.stat) {
+    for (var i = 0; i < entries.length; i ++) {
+      var e = entries[i]
+      if (abs === '/')
+        e = abs + e
+      else
+        e = abs + '/' + e
+      this.cache[e] = true
+    }
+  }
+
+  this.cache[abs] = entries
+
+  // mark and cache dir-ness
+  return entries
+}
+
+GlobSync.prototype._readdirError = function (f, er) {
+  // handle errors, and cache the information
+  switch (er.code) {
+    case 'ENOTSUP': // https://github.com/isaacs/node-glob/issues/205
+    case 'ENOTDIR': // totally normal. means it *does* exist.
+      var abs = this._makeAbs(f)
+      this.cache[abs] = 'FILE'
+      if (abs === this.cwdAbs) {
+        var error = new Error(er.code + ' invalid cwd ' + this.cwd)
+        error.path = this.cwd
+        error.code = er.code
+        throw error
+      }
+      break
+
+    case 'ENOENT': // not terribly unusual
+    case 'ELOOP':
+    case 'ENAMETOOLONG':
+    case 'UNKNOWN':
+      this.cache[this._makeAbs(f)] = false
+      break
+
+    default: // some unusual error.  Treat as failure.
+      this.cache[this._makeAbs(f)] = false
+      if (this.strict)
+        throw er
+      if (!this.silent)
+        console.error('glob error', er)
+      break
+  }
+}
+
+GlobSync.prototype._processGlobStar = function (prefix, read, abs, remain, index, inGlobStar) {
+
+  var entries = this._readdir(abs, inGlobStar)
+
+  // no entries means not a dir, so it can never have matches
+  // foo.txt/** doesn't match foo.txt
+  if (!entries)
+    return
+
+  // test without the globstar, and with every child both below
+  // and replacing the globstar.
+  var remainWithoutGlobStar = remain.slice(1)
+  var gspref = prefix ? [ prefix ] : []
+  var noGlobStar = gspref.concat(remainWithoutGlobStar)
+
+  // the noGlobStar pattern exits the inGlobStar state
+  this._process(noGlobStar, index, false)
+
+  var len = entries.length
+  var isSym = this.symlinks[abs]
+
+  // If it's a symlink, and we're in a globstar, then stop
+  if (isSym && inGlobStar)
+    return
+
+  for (var i = 0; i < len; i++) {
+    var e = entries[i]
+    if (e.charAt(0) === '.' && !this.dot)
+      continue
+
+    // these two cases enter the inGlobStar state
+    var instead = gspref.concat(entries[i], remainWithoutGlobStar)
+    this._process(instead, index, true)
+
+    var below = gspref.concat(entries[i], remain)
+    this._process(below, index, true)
+  }
+}
+
+GlobSync.prototype._processSimple = function (prefix, index) {
+  // XXX review this.  Shouldn't it be doing the mounting etc
+  // before doing stat?  kinda weird?
+  var exists = this._stat(prefix)
+
+  if (!this.matches[index])
+    this.matches[index] = Object.create(null)
+
+  // If it doesn't exist, then just mark the lack of results
+  if (!exists)
+    return
+
+  if (prefix && isAbsolute(prefix) && !this.nomount) {
+    var trail = /[\/\\]$/.test(prefix)
+    if (prefix.charAt(0) === '/') {
+      prefix = path.join(this.root, prefix)
+    } else {
+      prefix = path.resolve(this.root, prefix)
+      if (trail)
+        prefix += '/'
+    }
+  }
+
+  if (process.platform === 'win32')
+    prefix = prefix.replace(/\\/g, '/')
+
+  // Mark this as a match
+  this._emitMatch(index, prefix)
+}
+
+// Returns either 'DIR', 'FILE', or false
+GlobSync.prototype._stat = function (f) {
+  var abs = this._makeAbs(f)
+  var needDir = f.slice(-1) === '/'
+
+  if (f.length > this.maxLength)
+    return false
+
+  if (!this.stat && ownProp(this.cache, abs)) {
+    var c = this.cache[abs]
+
+    if (Array.isArray(c))
+      c = 'DIR'
+
+    // It exists, but maybe not how we need it
+    if (!needDir || c === 'DIR')
+      return c
+
+    if (needDir && c === 'FILE')
+      return false
+
+    // otherwise we have to stat, because maybe c=true
+    // if we know it exists, but not what it is.
+  }
+
+  var exists
+  var stat = this.statCache[abs]
+  if (!stat) {
+    var lstat
+    try {
+      lstat = this.fs.lstatSync(abs)
+    } catch (er) {
+      if (er && (er.code === 'ENOENT' || er.code === 'ENOTDIR')) {
+        this.statCache[abs] = false
+        return false
+      }
+    }
+
+    if (lstat && lstat.isSymbolicLink()) {
+      try {
+        stat = this.fs.statSync(abs)
+      } catch (er) {
+        stat = lstat
+      }
+    } else {
+      stat = lstat
+    }
+  }
+
+  this.statCache[abs] = stat
+
+  var c = true
+  if (stat)
+    c = stat.isDirectory() ? 'DIR' : 'FILE'
+
+  this.cache[abs] = this.cache[abs] || c
+
+  if (needDir && c === 'FILE')
+    return false
+
+  return c
+}
+
+GlobSync.prototype._mark = function (p) {
+  return common.mark(this, p)
+}
+
+GlobSync.prototype._makeAbs = function (f) {
+  return common.makeAbs(this, f)
+}

server/node_modules/broadcast-channel/node_modules/minimatch/LICENSE

@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

server/node_modules/broadcast-channel/node_modules/minimatch/README.md

@@ -0,0 +1,230 @@
+# minimatch
+
+A minimal matching utility.
+
+[![Build Status](https://travis-ci.org/isaacs/minimatch.svg?branch=master)](http://travis-ci.org/isaacs/minimatch)
+
+
+This is the matching library used internally by npm.
+
+It works by converting glob expressions into JavaScript `RegExp`
+objects.
+
+## Usage
+
+```javascript
+var minimatch = require("minimatch")
+
+minimatch("bar.foo", "*.foo") // true!
+minimatch("bar.foo", "*.bar") // false!
+minimatch("bar.foo", "*.+(bar|foo)", { debug: true }) // true, and noisy!
+```
+
+## Features
+
+Supports these glob features:
+
+* Brace Expansion
+* Extended glob matching
+* "Globstar" `**` matching
+
+See:
+
+* `man sh`
+* `man bash`
+* `man 3 fnmatch`
+* `man 5 gitignore`
+
+## Minimatch Class
+
+Create a minimatch object by instantiating the `minimatch.Minimatch` class.
+
+```javascript
+var Minimatch = require("minimatch").Minimatch
+var mm = new Minimatch(pattern, options)
+```
+
+### Properties
+
+* `pattern` The original pattern the minimatch object represents.
+* `options` The options supplied to the constructor.
+* `set` A 2-dimensional array of regexp or string expressions.
+  Each row in the
+  array corresponds to a brace-expanded pattern.  Each item in the row
+  corresponds to a single path-part.  For example, the pattern
+  `{a,b/c}/d` would expand to a set of patterns like:
+
+        [ [ a, d ]
+        , [ b, c, d ] ]
+
+    If a portion of the pattern doesn't have any "magic" in it
+    (that is, it's something like `"foo"` rather than `fo*o?`), then it
+    will be left as a string rather than converted to a regular
+    expression.
+
+* `regexp` Created by the `makeRe` method.  A single regular expression
+  expressing the entire pattern.  This is useful in cases where you wish
+  to use the pattern somewhat like `fnmatch(3)` with `FNM_PATH` enabled.
+* `negate` True if the pattern is negated.
+* `comment` True if the pattern is a comment.
+* `empty` True if the pattern is `""`.
+
+### Methods
+
+* `makeRe` Generate the `regexp` member if necessary, and return it.
+  Will return `false` if the pattern is invalid.
+* `match(fname)` Return true if the filename matches the pattern, or
+  false otherwise.
+* `matchOne(fileArray, patternArray, partial)` Take a `/`-split
+  filename, and match it against a single row in the `regExpSet`.  This
+  method is mainly for internal use, but is exposed so that it can be
+  used by a glob-walker that needs to avoid excessive filesystem calls.
+
+All other methods are internal, and will be called as necessary.
+
+### minimatch(path, pattern, options)
+
+Main export.  Tests a path against the pattern using the options.
+
+```javascript
+var isJS = minimatch(file, "*.js", { matchBase: true })
+```
+
+### minimatch.filter(pattern, options)
+
+Returns a function that tests its
+supplied argument, suitable for use with `Array.filter`.  Example:
+
+```javascript
+var javascripts = fileList.filter(minimatch.filter("*.js", {matchBase: true}))
+```
+
+### minimatch.match(list, pattern, options)
+
+Match against the list of
+files, in the style of fnmatch or glob.  If nothing is matched, and
+options.nonull is set, then return a list containing the pattern itself.
+
+```javascript
+var javascripts = minimatch.match(fileList, "*.js", {matchBase: true}))
+```
+
+### minimatch.makeRe(pattern, options)
+
+Make a regular expression object from the pattern.
+
+## Options
+
+All options are `false` by default.
+
+### debug
+
+Dump a ton of stuff to stderr.
+
+### nobrace
+
+Do not expand `{a,b}` and `{1..3}` brace sets.
+
+### noglobstar
+
+Disable `**` matching against multiple folder names.
+
+### dot
+
+Allow patterns to match filenames starting with a period, even if
+the pattern does not explicitly have a period in that spot.
+
+Note that by default, `a/**/b` will **not** match `a/.d/b`, unless `dot`
+is set.
+
+### noext
+
+Disable "extglob" style patterns like `+(a|b)`.
+
+### nocase
+
+Perform a case-insensitive match.
+
+### nonull
+
+When a match is not found by `minimatch.match`, return a list containing
+the pattern itself if this option is set.  When not set, an empty list
+is returned if there are no matches.
+
+### matchBase
+
+If set, then patterns without slashes will be matched
+against the basename of the path if it contains slashes.  For example,
+`a?b` would match the path `/xyz/123/acb`, but not `/xyz/acb/123`.
+
+### nocomment
+
+Suppress the behavior of treating `#` at the start of a pattern as a
+comment.
+
+### nonegate
+
+Suppress the behavior of treating a leading `!` character as negation.
+
+### flipNegate
+
+Returns from negate expressions the same as if they were not negated.
+(Ie, true on a hit, false on a miss.)
+
+### partial
+
+Compare a partial path to a pattern.  As long as the parts of the path that
+are present are not contradicted by the pattern, it will be treated as a
+match.  This is useful in applications where you're walking through a
+folder structure, and don't yet have the full path, but want to ensure that
+you do not walk down paths that can never be a match.
+
+For example,
+
+```js
+minimatch('/a/b', '/a/*/c/d', { partial: true })  // true, might be /a/b/c/d
+minimatch('/a/b', '/**/d', { partial: true })     // true, might be /a/b/.../d
+minimatch('/x/y/z', '/a/**/z', { partial: true }) // false, because x !== a
+```
+
+### allowWindowsEscape
+
+Windows path separator `\` is by default converted to `/`, which
+prohibits the usage of `\` as a escape character. This flag skips that
+behavior and allows using the escape character.
+
+## Comparisons to other fnmatch/glob implementations
+
+While strict compliance with the existing standards is a worthwhile
+goal, some discrepancies exist between minimatch and other
+implementations, and are intentional.
+
+If the pattern starts with a `!` character, then it is negated.  Set the
+`nonegate` flag to suppress this behavior, and treat leading `!`
+characters normally.  This is perhaps relevant if you wish to start the
+pattern with a negative extglob pattern like `!(a|B)`.  Multiple `!`
+characters at the start of a pattern will negate the pattern multiple
+times.
+
+If a pattern starts with `#`, then it is treated as a comment, and
+will not match anything.  Use `\#` to match a literal `#` at the
+start of a line, or set the `nocomment` flag to suppress this behavior.
+
+The double-star character `**` is supported by default, unless the
+`noglobstar` flag is set.  This is supported in the manner of bsdglob
+and bash 4.1, where `**` only has special significance if it is the only
+thing in a path part.  That is, `a/**/b` will match `a/x/y/b`, but
+`a/**b` will not.
+
+If an escaped pattern has no matches, and the `nonull` flag is set,
+then minimatch.match returns the pattern as-provided, rather than
+interpreting the character escapes.  For example,
+`minimatch.match([], "\\*a\\?")` will return `"\\*a\\?"` rather than
+`"*a?"`.  This is akin to setting the `nullglob` option in bash, except
+that it does not resolve escaped pattern characters.
+
+If brace expansion is not disabled, then it is performed before any
+other interpretation of the glob pattern.  Thus, a pattern like
+`+(a|{b),c)}`, which would not be valid in bash or zsh, is expanded
+**first** into the set of `+(a|b)` and `+(a|c)`, and those patterns are
+checked for validity.  Since those two are valid, matching proceeds.

server/node_modules/broadcast-channel/node_modules/minimatch/minimatch.js

@@ -0,0 +1,947 @@
+module.exports = minimatch
+minimatch.Minimatch = Minimatch
+
+var path = (function () { try { return require('path') } catch (e) {}}()) || {
+  sep: '/'
+}
+minimatch.sep = path.sep
+
+var GLOBSTAR = minimatch.GLOBSTAR = Minimatch.GLOBSTAR = {}
+var expand = require('brace-expansion')
+
+var plTypes = {
+  '!': { open: '(?:(?!(?:', close: '))[^/]*?)'},
+  '?': { open: '(?:', close: ')?' },
+  '+': { open: '(?:', close: ')+' },
+  '*': { open: '(?:', close: ')*' },
+  '@': { open: '(?:', close: ')' }
+}
+
+// any single thing other than /
+// don't need to escape / when using new RegExp()
+var qmark = '[^/]'
+
+// * => any number of characters
+var star = qmark + '*?'
+
+// ** when dots are allowed.  Anything goes, except .. and .
+// not (^ or / followed by one or two dots followed by $ or /),
+// followed by anything, any number of times.
+var twoStarDot = '(?:(?!(?:\\\/|^)(?:\\.{1,2})($|\\\/)).)*?'
+
+// not a ^ or / followed by a dot,
+// followed by anything, any number of times.
+var twoStarNoDot = '(?:(?!(?:\\\/|^)\\.).)*?'
+
+// characters that need to be escaped in RegExp.
+var reSpecials = charSet('().*{}+?[]^$\\!')
+
+// "abc" -> { a:true, b:true, c:true }
+function charSet (s) {
+  return s.split('').reduce(function (set, c) {
+    set[c] = true
+    return set
+  }, {})
+}
+
+// normalizes slashes.
+var slashSplit = /\/+/
+
+minimatch.filter = filter
+function filter (pattern, options) {
+  options = options || {}
+  return function (p, i, list) {
+    return minimatch(p, pattern, options)
+  }
+}
+
+function ext (a, b) {
+  b = b || {}
+  var t = {}
+  Object.keys(a).forEach(function (k) {
+    t[k] = a[k]
+  })
+  Object.keys(b).forEach(function (k) {
+    t[k] = b[k]
+  })
+  return t
+}
+
+minimatch.defaults = function (def) {
+  if (!def || typeof def !== 'object' || !Object.keys(def).length) {
+    return minimatch
+  }
+
+  var orig = minimatch
+
+  var m = function minimatch (p, pattern, options) {
+    return orig(p, pattern, ext(def, options))
+  }
+
+  m.Minimatch = function Minimatch (pattern, options) {
+    return new orig.Minimatch(pattern, ext(def, options))
+  }
+  m.Minimatch.defaults = function defaults (options) {
+    return orig.defaults(ext(def, options)).Minimatch
+  }
+
+  m.filter = function filter (pattern, options) {
+    return orig.filter(pattern, ext(def, options))
+  }
+
+  m.defaults = function defaults (options) {
+    return orig.defaults(ext(def, options))
+  }
+
+  m.makeRe = function makeRe (pattern, options) {
+    return orig.makeRe(pattern, ext(def, options))
+  }
+
+  m.braceExpand = function braceExpand (pattern, options) {
+    return orig.braceExpand(pattern, ext(def, options))
+  }
+
+  m.match = function (list, pattern, options) {
+    return orig.match(list, pattern, ext(def, options))
+  }
+
+  return m
+}
+
+Minimatch.defaults = function (def) {
+  return minimatch.defaults(def).Minimatch
+}
+
+function minimatch (p, pattern, options) {
+  assertValidPattern(pattern)
+
+  if (!options) options = {}
+
+  // shortcut: comments match nothing.
+  if (!options.nocomment && pattern.charAt(0) === '#') {
+    return false
+  }
+
+  return new Minimatch(pattern, options).match(p)
+}
+
+function Minimatch (pattern, options) {
+  if (!(this instanceof Minimatch)) {
+    return new Minimatch(pattern, options)
+  }
+
+  assertValidPattern(pattern)
+
+  if (!options) options = {}
+
+  pattern = pattern.trim()
+
+  // windows support: need to use /, not \
+  if (!options.allowWindowsEscape && path.sep !== '/') {
+    pattern = pattern.split(path.sep).join('/')
+  }
+
+  this.options = options
+  this.set = []
+  this.pattern = pattern
+  this.regexp = null
+  this.negate = false
+  this.comment = false
+  this.empty = false
+  this.partial = !!options.partial
+
+  // make the set of regexps etc.
+  this.make()
+}
+
+Minimatch.prototype.debug = function () {}
+
+Minimatch.prototype.make = make
+function make () {
+  var pattern = this.pattern
+  var options = this.options
+
+  // empty patterns and comments match nothing.
+  if (!options.nocomment && pattern.charAt(0) === '#') {
+    this.comment = true
+    return
+  }
+  if (!pattern) {
+    this.empty = true
+    return
+  }
+
+  // step 1: figure out negation, etc.
+  this.parseNegate()
+
+  // step 2: expand braces
+  var set = this.globSet = this.braceExpand()
+
+  if (options.debug) this.debug = function debug() { console.error.apply(console, arguments) }
+
+  this.debug(this.pattern, set)
+
+  // step 3: now we have a set, so turn each one into a series of path-portion
+  // matching patterns.
+  // These will be regexps, except in the case of "**", which is
+  // set to the GLOBSTAR object for globstar behavior,
+  // and will not contain any / characters
+  set = this.globParts = set.map(function (s) {
+    return s.split(slashSplit)
+  })
+
+  this.debug(this.pattern, set)
+
+  // glob --> regexps
+  set = set.map(function (s, si, set) {
+    return s.map(this.parse, this)
+  }, this)
+
+  this.debug(this.pattern, set)
+
+  // filter out everything that didn't compile properly.
+  set = set.filter(function (s) {
+    return s.indexOf(false) === -1
+  })
+
+  this.debug(this.pattern, set)
+
+  this.set = set
+}
+
+Minimatch.prototype.parseNegate = parseNegate
+function parseNegate () {
+  var pattern = this.pattern
+  var negate = false
+  var options = this.options
+  var negateOffset = 0
+
+  if (options.nonegate) return
+
+  for (var i = 0, l = pattern.length
+    ; i < l && pattern.charAt(i) === '!'
+    ; i++) {
+    negate = !negate
+    negateOffset++
+  }
+
+  if (negateOffset) this.pattern = pattern.substr(negateOffset)
+  this.negate = negate
+}
+
+// Brace expansion:
+// a{b,c}d -> abd acd
+// a{b,}c -> abc ac
+// a{0..3}d -> a0d a1d a2d a3d
+// a{b,c{d,e}f}g -> abg acdfg acefg
+// a{b,c}d{e,f}g -> abdeg acdeg abdeg abdfg
+//
+// Invalid sets are not expanded.
+// a{2..}b -> a{2..}b
+// a{b}c -> a{b}c
+minimatch.braceExpand = function (pattern, options) {
+  return braceExpand(pattern, options)
+}
+
+Minimatch.prototype.braceExpand = braceExpand
+
+function braceExpand (pattern, options) {
+  if (!options) {
+    if (this instanceof Minimatch) {
+      options = this.options
+    } else {
+      options = {}
+    }
+  }
+
+  pattern = typeof pattern === 'undefined'
+    ? this.pattern : pattern
+
+  assertValidPattern(pattern)
+
+  // Thanks to Yeting Li <https://github.com/yetingli> for
+  // improving this regexp to avoid a ReDOS vulnerability.
+  if (options.nobrace || !/\{(?:(?!\{).)*\}/.test(pattern)) {
+    // shortcut. no need to expand.
+    return [pattern]
+  }
+
+  return expand(pattern)
+}
+
+var MAX_PATTERN_LENGTH = 1024 * 64
+var assertValidPattern = function (pattern) {
+  if (typeof pattern !== 'string') {
+    throw new TypeError('invalid pattern')
+  }
+
+  if (pattern.length > MAX_PATTERN_LENGTH) {
+    throw new TypeError('pattern is too long')
+  }
+}
+
+// parse a component of the expanded set.
+// At this point, no pattern may contain "/" in it
+// so we're going to return a 2d array, where each entry is the full
+// pattern, split on '/', and then turned into a regular expression.
+// A regexp is made at the end which joins each array with an
+// escaped /, and another full one which joins each regexp with |.
+//
+// Following the lead of Bash 4.1, note that "**" only has special meaning
+// when it is the *only* thing in a path portion.  Otherwise, any series
+// of * is equivalent to a single *.  Globstar behavior is enabled by
+// default, and can be disabled by setting options.noglobstar.
+Minimatch.prototype.parse = parse
+var SUBPARSE = {}
+function parse (pattern, isSub) {
+  assertValidPattern(pattern)
+
+  var options = this.options
+
+  // shortcuts
+  if (pattern === '**') {
+    if (!options.noglobstar)
+      return GLOBSTAR
+    else
+      pattern = '*'
+  }
+  if (pattern === '') return ''
+
+  var re = ''
+  var hasMagic = !!options.nocase
+  var escaping = false
+  // ? => one single character
+  var patternListStack = []
+  var negativeLists = []
+  var stateChar
+  var inClass = false
+  var reClassStart = -1
+  var classStart = -1
+  // . and .. never match anything that doesn't start with .,
+  // even when options.dot is set.
+  var patternStart = pattern.charAt(0) === '.' ? '' // anything
+  // not (start or / followed by . or .. followed by / or end)
+  : options.dot ? '(?!(?:^|\\\/)\\.{1,2}(?:$|\\\/))'
+  : '(?!\\.)'
+  var self = this
+
+  function clearStateChar () {
+    if (stateChar) {
+      // we had some state-tracking character
+      // that wasn't consumed by this pass.
+      switch (stateChar) {
+        case '*':
+          re += star
+          hasMagic = true
+        break
+        case '?':
+          re += qmark
+          hasMagic = true
+        break
+        default:
+          re += '\\' + stateChar
+        break
+      }
+      self.debug('clearStateChar %j %j', stateChar, re)
+      stateChar = false
+    }
+  }
+
+  for (var i = 0, len = pattern.length, c
+    ; (i < len) && (c = pattern.charAt(i))
+    ; i++) {
+    this.debug('%s\t%s %s %j', pattern, i, re, c)
+
+    // skip over any that are escaped.
+    if (escaping && reSpecials[c]) {
+      re += '\\' + c
+      escaping = false
+      continue
+    }
+
+    switch (c) {
+      /* istanbul ignore next */
+      case '/': {
+        // completely not allowed, even escaped.
+        // Should already be path-split by now.
+        return false
+      }
+
+      case '\\':
+        clearStateChar()
+        escaping = true
+      continue
+
+      // the various stateChar values
+      // for the "extglob" stuff.
+      case '?':
+      case '*':
+      case '+':
+      case '@':
+      case '!':
+        this.debug('%s\t%s %s %j <-- stateChar', pattern, i, re, c)
+
+        // all of those are literals inside a class, except that
+        // the glob [!a] means [^a] in regexp
+        if (inClass) {
+          this.debug('  in class')
+          if (c === '!' && i === classStart + 1) c = '^'
+          re += c
+          continue
+        }
+
+        // if we already have a stateChar, then it means
+        // that there was something like ** or +? in there.
+        // Handle the stateChar, then proceed with this one.
+        self.debug('call clearStateChar %j', stateChar)
+        clearStateChar()
+        stateChar = c
+        // if extglob is disabled, then +(asdf|foo) isn't a thing.
+        // just clear the statechar *now*, rather than even diving into
+        // the patternList stuff.
+        if (options.noext) clearStateChar()
+      continue
+
+      case '(':
+        if (inClass) {
+          re += '('
+          continue
+        }
+
+        if (!stateChar) {
+          re += '\\('
+          continue
+        }
+
+        patternListStack.push({
+          type: stateChar,
+          start: i - 1,
+          reStart: re.length,
+          open: plTypes[stateChar].open,
+          close: plTypes[stateChar].close
+        })
+        // negation is (?:(?!js)[^/]*)
+        re += stateChar === '!' ? '(?:(?!(?:' : '(?:'
+        this.debug('plType %j %j', stateChar, re)
+        stateChar = false
+      continue
+
+      case ')':
+        if (inClass || !patternListStack.length) {
+          re += '\\)'
+          continue
+        }
+
+        clearStateChar()
+        hasMagic = true
+        var pl = patternListStack.pop()
+        // negation is (?:(?!js)[^/]*)
+        // The others are (?:<pattern>)<type>
+        re += pl.close
+        if (pl.type === '!') {
+          negativeLists.push(pl)
+        }
+        pl.reEnd = re.length
+      continue
+
+      case '|':
+        if (inClass || !patternListStack.length || escaping) {
+          re += '\\|'
+          escaping = false
+          continue
+        }
+
+        clearStateChar()
+        re += '|'
+      continue
+
+      // these are mostly the same in regexp and glob
+      case '[':
+        // swallow any state-tracking char before the [
+        clearStateChar()
+
+        if (inClass) {
+          re += '\\' + c
+          continue
+        }
+
+        inClass = true
+        classStart = i
+        reClassStart = re.length
+        re += c
+      continue
+
+      case ']':
+        //  a right bracket shall lose its special
+        //  meaning and represent itself in
+        //  a bracket expression if it occurs
+        //  first in the list.  -- POSIX.2 2.8.3.2
+        if (i === classStart + 1 || !inClass) {
+          re += '\\' + c
+          escaping = false
+          continue
+        }
+
+        // handle the case where we left a class open.
+        // "[z-a]" is valid, equivalent to "\[z-a\]"
+        // split where the last [ was, make sure we don't have
+        // an invalid re. if so, re-walk the contents of the
+        // would-be class to re-translate any characters that
+        // were passed through as-is
+        // TODO: It would probably be faster to determine this
+        // without a try/catch and a new RegExp, but it's tricky
+        // to do safely.  For now, this is safe and works.
+        var cs = pattern.substring(classStart + 1, i)
+        try {
+          RegExp('[' + cs + ']')
+        } catch (er) {
+          // not a valid class!
+          var sp = this.parse(cs, SUBPARSE)
+          re = re.substr(0, reClassStart) + '\\[' + sp[0] + '\\]'
+          hasMagic = hasMagic || sp[1]
+          inClass = false
+          continue
+        }
+
+        // finish up the class.
+        hasMagic = true
+        inClass = false
+        re += c
+      continue
+
+      default:
+        // swallow any state char that wasn't consumed
+        clearStateChar()
+
+        if (escaping) {
+          // no need
+          escaping = false
+        } else if (reSpecials[c]
+          && !(c === '^' && inClass)) {
+          re += '\\'
+        }
+
+        re += c
+
+    } // switch
+  } // for
+
+  // handle the case where we left a class open.
+  // "[abc" is valid, equivalent to "\[abc"
+  if (inClass) {
+    // split where the last [ was, and escape it
+    // this is a huge pita.  We now have to re-walk
+    // the contents of the would-be class to re-translate
+    // any characters that were passed through as-is
+    cs = pattern.substr(classStart + 1)
+    sp = this.parse(cs, SUBPARSE)
+    re = re.substr(0, reClassStart) + '\\[' + sp[0]
+    hasMagic = hasMagic || sp[1]
+  }
+
+  // handle the case where we had a +( thing at the *end*
+  // of the pattern.
+  // each pattern list stack adds 3 chars, and we need to go through
+  // and escape any | chars that were passed through as-is for the regexp.
+  // Go through and escape them, taking care not to double-escape any
+  // | chars that were already escaped.
+  for (pl = patternListStack.pop(); pl; pl = patternListStack.pop()) {
+    var tail = re.slice(pl.reStart + pl.open.length)
+    this.debug('setting tail', re, pl)
+    // maybe some even number of \, then maybe 1 \, followed by a |
+    tail = tail.replace(/((?:\\{2}){0,64})(\\?)\|/g, function (_, $1, $2) {
+      if (!$2) {
+        // the | isn't already escaped, so escape it.
+        $2 = '\\'
+      }
+
+      // need to escape all those slashes *again*, without escaping the
+      // one that we need for escaping the | character.  As it works out,
+      // escaping an even number of slashes can be done by simply repeating
+      // it exactly after itself.  That's why this trick works.
+      //
+      // I am sorry that you have to see this.
+      return $1 + $1 + $2 + '|'
+    })
+
+    this.debug('tail=%j\n   %s', tail, tail, pl, re)
+    var t = pl.type === '*' ? star
+      : pl.type === '?' ? qmark
+      : '\\' + pl.type
+
+    hasMagic = true
+    re = re.slice(0, pl.reStart) + t + '\\(' + tail
+  }
+
+  // handle trailing things that only matter at the very end.
+  clearStateChar()
+  if (escaping) {
+    // trailing \\
+    re += '\\\\'
+  }
+
+  // only need to apply the nodot start if the re starts with
+  // something that could conceivably capture a dot
+  var addPatternStart = false
+  switch (re.charAt(0)) {
+    case '[': case '.': case '(': addPatternStart = true
+  }
+
+  // Hack to work around lack of negative lookbehind in JS
+  // A pattern like: *.!(x).!(y|z) needs to ensure that a name
+  // like 'a.xyz.yz' doesn't match.  So, the first negative
+  // lookahead, has to look ALL the way ahead, to the end of
+  // the pattern.
+  for (var n = negativeLists.length - 1; n > -1; n--) {
+    var nl = negativeLists[n]
+
+    var nlBefore = re.slice(0, nl.reStart)
+    var nlFirst = re.slice(nl.reStart, nl.reEnd - 8)
+    var nlLast = re.slice(nl.reEnd - 8, nl.reEnd)
+    var nlAfter = re.slice(nl.reEnd)
+
+    nlLast += nlAfter
+
+    // Handle nested stuff like *(*.js|!(*.json)), where open parens
+    // mean that we should *not* include the ) in the bit that is considered
+    // "after" the negated section.
+    var openParensBefore = nlBefore.split('(').length - 1
+    var cleanAfter = nlAfter
+    for (i = 0; i < openParensBefore; i++) {
+      cleanAfter = cleanAfter.replace(/\)[+*?]?/, '')
+    }
+    nlAfter = cleanAfter
+
+    var dollar = ''
+    if (nlAfter === '' && isSub !== SUBPARSE) {
+      dollar = '$'
+    }
+    var newRe = nlBefore + nlFirst + nlAfter + dollar + nlLast
+    re = newRe
+  }
+
+  // if the re is not "" at this point, then we need to make sure
+  // it doesn't match against an empty path part.
+  // Otherwise a/* will match a/, which it should not.
+  if (re !== '' && hasMagic) {
+    re = '(?=.)' + re
+  }
+
+  if (addPatternStart) {
+    re = patternStart + re
+  }
+
+  // parsing just a piece of a larger pattern.
+  if (isSub === SUBPARSE) {
+    return [re, hasMagic]
+  }
+
+  // skip the regexp for non-magical patterns
+  // unescape anything in it, though, so that it'll be
+  // an exact match against a file etc.
+  if (!hasMagic) {
+    return globUnescape(pattern)
+  }
+
+  var flags = options.nocase ? 'i' : ''
+  try {
+    var regExp = new RegExp('^' + re + '$', flags)
+  } catch (er) /* istanbul ignore next - should be impossible */ {
+    // If it was an invalid regular expression, then it can't match
+    // anything.  This trick looks for a character after the end of
+    // the string, which is of course impossible, except in multi-line
+    // mode, but it's not a /m regex.
+    return new RegExp('$.')
+  }
+
+  regExp._glob = pattern
+  regExp._src = re
+
+  return regExp
+}
+
+minimatch.makeRe = function (pattern, options) {
+  return new Minimatch(pattern, options || {}).makeRe()
+}
+
+Minimatch.prototype.makeRe = makeRe
+function makeRe () {
+  if (this.regexp || this.regexp === false) return this.regexp
+
+  // at this point, this.set is a 2d array of partial
+  // pattern strings, or "**".
+  //
+  // It's better to use .match().  This function shouldn't
+  // be used, really, but it's pretty convenient sometimes,
+  // when you just want to work with a regex.
+  var set = this.set
+
+  if (!set.length) {
+    this.regexp = false
+    return this.regexp
+  }
+  var options = this.options
+
+  var twoStar = options.noglobstar ? star
+    : options.dot ? twoStarDot
+    : twoStarNoDot
+  var flags = options.nocase ? 'i' : ''
+
+  var re = set.map(function (pattern) {
+    return pattern.map(function (p) {
+      return (p === GLOBSTAR) ? twoStar
+      : (typeof p === 'string') ? regExpEscape(p)
+      : p._src
+    }).join('\\\/')
+  }).join('|')
+
+  // must match entire pattern
+  // ending in a * or ** will make it less strict.
+  re = '^(?:' + re + ')$'
+
+  // can match anything, as long as it's not this.
+  if (this.negate) re = '^(?!' + re + ').*$'
+
+  try {
+    this.regexp = new RegExp(re, flags)
+  } catch (ex) /* istanbul ignore next - should be impossible */ {
+    this.regexp = false
+  }
+  return this.regexp
+}
+
+minimatch.match = function (list, pattern, options) {
+  options = options || {}
+  var mm = new Minimatch(pattern, options)
+  list = list.filter(function (f) {
+    return mm.match(f)
+  })
+  if (mm.options.nonull && !list.length) {
+    list.push(pattern)
+  }
+  return list
+}
+
+Minimatch.prototype.match = function match (f, partial) {
+  if (typeof partial === 'undefined') partial = this.partial
+  this.debug('match', f, this.pattern)
+  // short-circuit in the case of busted things.
+  // comments, etc.
+  if (this.comment) return false
+  if (this.empty) return f === ''
+
+  if (f === '/' && partial) return true
+
+  var options = this.options
+
+  // windows: need to use /, not \
+  if (path.sep !== '/') {
+    f = f.split(path.sep).join('/')
+  }
+
+  // treat the test path as a set of pathparts.
+  f = f.split(slashSplit)
+  this.debug(this.pattern, 'split', f)
+
+  // just ONE of the pattern sets in this.set needs to match
+  // in order for it to be valid.  If negating, then just one
+  // match means that we have failed.
+  // Either way, return on the first hit.
+
+  var set = this.set
+  this.debug(this.pattern, 'set', set)
+
+  // Find the basename of the path by looking for the last non-empty segment
+  var filename
+  var i
+  for (i = f.length - 1; i >= 0; i--) {
+    filename = f[i]
+    if (filename) break
+  }
+
+  for (i = 0; i < set.length; i++) {
+    var pattern = set[i]
+    var file = f
+    if (options.matchBase && pattern.length === 1) {
+      file = [filename]
+    }
+    var hit = this.matchOne(file, pattern, partial)
+    if (hit) {
+      if (options.flipNegate) return true
+      return !this.negate
+    }
+  }
+
+  // didn't get any hits.  this is success if it's a negative
+  // pattern, failure otherwise.
+  if (options.flipNegate) return false
+  return this.negate
+}
+
+// set partial to true to test if, for example,
+// "/a/b" matches the start of "/*/b/*/d"
+// Partial means, if you run out of file before you run
+// out of pattern, then that's fine, as long as all
+// the parts match.
+Minimatch.prototype.matchOne = function (file, pattern, partial) {
+  var options = this.options
+
+  this.debug('matchOne',
+    { 'this': this, file: file, pattern: pattern })
+
+  this.debug('matchOne', file.length, pattern.length)
+
+  for (var fi = 0,
+      pi = 0,
+      fl = file.length,
+      pl = pattern.length
+      ; (fi < fl) && (pi < pl)
+      ; fi++, pi++) {
+    this.debug('matchOne loop')
+    var p = pattern[pi]
+    var f = file[fi]
+
+    this.debug(pattern, p, f)
+
+    // should be impossible.
+    // some invalid regexp stuff in the set.
+    /* istanbul ignore if */
+    if (p === false) return false
+
+    if (p === GLOBSTAR) {
+      this.debug('GLOBSTAR', [pattern, p, f])
+
+      // "**"
+      // a/**/b/**/c would match the following:
+      // a/b/x/y/z/c
+      // a/x/y/z/b/c
+      // a/b/x/b/x/c
+      // a/b/c
+      // To do this, take the rest of the pattern after
+      // the **, and see if it would match the file remainder.
+      // If so, return success.
+      // If not, the ** "swallows" a segment, and try again.
+      // This is recursively awful.
+      //
+      // a/**/b/**/c matching a/b/x/y/z/c
+      // - a matches a
+      // - doublestar
+      //   - matchOne(b/x/y/z/c, b/**/c)
+      //     - b matches b
+      //     - doublestar
+      //       - matchOne(x/y/z/c, c) -> no
+      //       - matchOne(y/z/c, c) -> no
+      //       - matchOne(z/c, c) -> no
+      //       - matchOne(c, c) yes, hit
+      var fr = fi
+      var pr = pi + 1
+      if (pr === pl) {
+        this.debug('** at the end')
+        // a ** at the end will just swallow the rest.
+        // We have found a match.
+        // however, it will not swallow /.x, unless
+        // options.dot is set.
+        // . and .. are *never* matched by **, for explosively
+        // exponential reasons.
+        for (; fi < fl; fi++) {
+          if (file[fi] === '.' || file[fi] === '..' ||
+            (!options.dot && file[fi].charAt(0) === '.')) return false
+        }
+        return true
+      }
+
+      // ok, let's see if we can swallow whatever we can.
+      while (fr < fl) {
+        var swallowee = file[fr]
+
+        this.debug('\nglobstar while', file, fr, pattern, pr, swallowee)
+
+        // XXX remove this slice.  Just pass the start index.
+        if (this.matchOne(file.slice(fr), pattern.slice(pr), partial)) {
+          this.debug('globstar found match!', fr, fl, swallowee)
+          // found a match.
+          return true
+        } else {
+          // can't swallow "." or ".." ever.
+          // can only swallow ".foo" when explicitly asked.
+          if (swallowee === '.' || swallowee === '..' ||
+            (!options.dot && swallowee.charAt(0) === '.')) {
+            this.debug('dot detected!', file, fr, pattern, pr)
+            break
+          }
+
+          // ** swallows a segment, and continue.
+          this.debug('globstar swallow a segment, and continue')
+          fr++
+        }
+      }
+
+      // no match was found.
+      // However, in partial mode, we can't say this is necessarily over.
+      // If there's more *pattern* left, then
+      /* istanbul ignore if */
+      if (partial) {
+        // ran out of file
+        this.debug('\n>>> no match, partial?', file, fr, pattern, pr)
+        if (fr === fl) return true
+      }
+      return false
+    }
+
+    // something other than **
+    // non-magic patterns just have to match exactly
+    // patterns with magic have been turned into regexps.
+    var hit
+    if (typeof p === 'string') {
+      hit = f === p
+      this.debug('string match', p, f, hit)
+    } else {
+      hit = f.match(p)
+      this.debug('pattern match', p, f, hit)
+    }
+
+    if (!hit) return false
+  }
+
+  // Note: ending in / means that we'll get a final ""
+  // at the end of the pattern.  This can only match a
+  // corresponding "" at the end of the file.
+  // If the file ends in /, then it can only match a
+  // a pattern that ends in /, unless the pattern just
+  // doesn't have any more for it. But, a/b/ should *not*
+  // match "a/b/*", even though "" matches against the
+  // [^/]*? pattern, except in partial mode, where it might
+  // simply not be reached yet.
+  // However, a/b/ should still satisfy a/*
+
+  // now either we fell off the end of the pattern, or we're done.
+  if (fi === fl && pi === pl) {
+    // ran out of pattern and filename at the same time.
+    // an exact hit!
+    return true
+  } else if (fi === fl) {
+    // ran out of file, but still had pattern left.
+    // this is ok if we're doing the match as part of
+    // a glob fs traversal.
+    return partial
+  } else /* istanbul ignore else */ if (pi === pl) {
+    // ran out of pattern, still have file left.
+    // this is only acceptable if we're on the very last
+    // empty segment of a file with a trailing slash.
+    // a/* should match a/b/
+    return (fi === fl - 1) && (file[fi] === '')
+  }
+
+  // should be unreachable.
+  /* istanbul ignore next */
+  throw new Error('wtf?')
+}
+
+// replace stuff like \* with *
+function globUnescape (s) {
+  return s.replace(/\\(.)/g, '$1')
+}
+
+function regExpEscape (s) {
+  return s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&')
+}

server/node_modules/broadcast-channel/node_modules/minimatch/package.json

@@ -0,0 +1,33 @@
+{
+  "author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me)",
+  "name": "minimatch",
+  "description": "a glob matcher in javascript",
+  "version": "3.1.2",
+  "publishConfig": {
+    "tag": "v3-legacy"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/minimatch.git"
+  },
+  "main": "minimatch.js",
+  "scripts": {
+    "test": "tap",
+    "preversion": "npm test",
+    "postversion": "npm publish",
+    "postpublish": "git push origin --all; git push origin --tags"
+  },
+  "engines": {
+    "node": "*"
+  },
+  "dependencies": {
+    "brace-expansion": "^1.1.7"
+  },
+  "devDependencies": {
+    "tap": "^15.1.6"
+  },
+  "license": "ISC",
+  "files": [
+    "minimatch.js"
+  ]
+}

server/node_modules/broadcast-channel/node_modules/rimraf/CHANGELOG.md

@@ -0,0 +1,65 @@
+# v3.0
+
+- Add `--preserve-root` option to executable (default true)
+- Drop support for Node.js below version 6
+
+# v2.7
+
+- Make `glob` an optional dependency
+
+# 2.6
+
+- Retry on EBUSY on non-windows platforms as well
+- Make `rimraf.sync` 10000% more reliable on Windows
+
+# 2.5
+
+- Handle Windows EPERM when lstat-ing read-only dirs
+- Add glob option to pass options to glob
+
+# 2.4
+
+- Add EPERM to delay/retry loop
+- Add `disableGlob` option
+
+# 2.3
+
+- Make maxBusyTries and emfileWait configurable
+- Handle weird SunOS unlink-dir issue
+- Glob the CLI arg for better Windows support
+
+# 2.2
+
+- Handle ENOENT properly on Windows
+- Allow overriding fs methods
+- Treat EPERM as indicative of non-empty dir
+- Remove optional graceful-fs dep
+- Consistently return null error instead of undefined on success
+- win32: Treat ENOTEMPTY the same as EBUSY
+- Add `rimraf` binary
+
+# 2.1
+
+- Fix SunOS error code for a non-empty directory
+- Try rmdir before readdir
+- Treat EISDIR like EPERM
+- Remove chmod
+- Remove lstat polyfill, node 0.7 is not supported
+
+# 2.0
+
+- Fix myGid call to check process.getgid
+- Simplify the EBUSY backoff logic.
+- Use fs.lstat in node >= 0.7.9
+- Remove gently option
+- remove fiber implementation
+- Delete files that are marked read-only
+
+# 1.0
+
+- Allow ENOENT in sync method
+- Throw when no callback is provided
+- Make opts.gently an absolute path
+- use 'stat' if 'lstat' is not available
+- Consistent error naming, and rethrow non-ENOENT stat errors
+- add fiber implementation

server/node_modules/broadcast-channel/node_modules/rimraf/LICENSE

@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

server/node_modules/broadcast-channel/node_modules/rimraf/README.md

@@ -0,0 +1,101 @@
+[![Build Status](https://travis-ci.org/isaacs/rimraf.svg?branch=master)](https://travis-ci.org/isaacs/rimraf) [![Dependency Status](https://david-dm.org/isaacs/rimraf.svg)](https://david-dm.org/isaacs/rimraf) [![devDependency Status](https://david-dm.org/isaacs/rimraf/dev-status.svg)](https://david-dm.org/isaacs/rimraf#info=devDependencies)
+
+The [UNIX command](http://en.wikipedia.org/wiki/Rm_(Unix)) `rm -rf` for node.
+
+Install with `npm install rimraf`, or just drop rimraf.js somewhere.
+
+## API
+
+`rimraf(f, [opts], callback)`
+
+The first parameter will be interpreted as a globbing pattern for files. If you
+want to disable globbing you can do so with `opts.disableGlob` (defaults to
+`false`). This might be handy, for instance, if you have filenames that contain
+globbing wildcard characters.
+
+The callback will be called with an error if there is one.  Certain
+errors are handled for you:
+
+* Windows: `EBUSY` and `ENOTEMPTY` - rimraf will back off a maximum of
+  `opts.maxBusyTries` times before giving up, adding 100ms of wait
+  between each attempt.  The default `maxBusyTries` is 3.
+* `ENOENT` - If the file doesn't exist, rimraf will return
+  successfully, since your desired outcome is already the case.
+* `EMFILE` - Since `readdir` requires opening a file descriptor, it's
+  possible to hit `EMFILE` if too many file descriptors are in use.
+  In the sync case, there's nothing to be done for this.  But in the
+  async case, rimraf will gradually back off with timeouts up to
+  `opts.emfileWait` ms, which defaults to 1000.
+
+## options
+
+* unlink, chmod, stat, lstat, rmdir, readdir,
+  unlinkSync, chmodSync, statSync, lstatSync, rmdirSync, readdirSync
+
+    In order to use a custom file system library, you can override
+    specific fs functions on the options object.
+
+    If any of these functions are present on the options object, then
+    the supplied function will be used instead of the default fs
+    method.
+
+    Sync methods are only relevant for `rimraf.sync()`, of course.
+
+    For example:
+
+    ```javascript
+    var myCustomFS = require('some-custom-fs')
+
+    rimraf('some-thing', myCustomFS, callback)
+    ```
+
+* maxBusyTries
+
+    If an `EBUSY`, `ENOTEMPTY`, or `EPERM` error code is encountered
+    on Windows systems, then rimraf will retry with a linear backoff
+    wait of 100ms longer on each try.  The default maxBusyTries is 3.
+
+    Only relevant for async usage.
+
+* emfileWait
+
+    If an `EMFILE` error is encountered, then rimraf will retry
+    repeatedly with a linear backoff of 1ms longer on each try, until
+    the timeout counter hits this max.  The default limit is 1000.
+
+    If you repeatedly encounter `EMFILE` errors, then consider using
+    [graceful-fs](http://npm.im/graceful-fs) in your program.
+
+    Only relevant for async usage.
+
+* glob
+
+    Set to `false` to disable [glob](http://npm.im/glob) pattern
+    matching.
+
+    Set to an object to pass options to the glob module.  The default
+    glob options are `{ nosort: true, silent: true }`.
+
+    Glob version 6 is used in this module.
+
+    Relevant for both sync and async usage.
+
+* disableGlob
+
+    Set to any non-falsey value to disable globbing entirely.
+    (Equivalent to setting `glob: false`.)
+
+## rimraf.sync
+
+It can remove stuff synchronously, too.  But that's not so good.  Use
+the async API.  It's better.
+
+## CLI
+
+If installed with `npm install rimraf -g` it can be used as a global
+command `rimraf <path> [<path> ...]` which is useful for cross platform support.
+
+## mkdirp
+
+If you need to create a directory recursively, check out
+[mkdirp](https://github.com/substack/node-mkdirp).

server/node_modules/broadcast-channel/node_modules/rimraf/bin.js

@@ -0,0 +1,68 @@
+#!/usr/bin/env node
+
+const rimraf = require('./')
+
+const path = require('path')
+
+const isRoot = arg => /^(\/|[a-zA-Z]:\\)$/.test(path.resolve(arg))
+const filterOutRoot = arg => {
+  const ok = preserveRoot === false || !isRoot(arg)
+  if (!ok) {
+    console.error(`refusing to remove ${arg}`)
+    console.error('Set --no-preserve-root to allow this')
+  }
+  return ok
+}
+
+let help = false
+let dashdash = false
+let noglob = false
+let preserveRoot = true
+const args = process.argv.slice(2).filter(arg => {
+  if (dashdash)
+    return !!arg
+  else if (arg === '--')
+    dashdash = true
+  else if (arg === '--no-glob' || arg === '-G')
+    noglob = true
+  else if (arg === '--glob' || arg === '-g')
+    noglob = false
+  else if (arg.match(/^(-+|\/)(h(elp)?|\?)$/))
+    help = true
+  else if (arg === '--preserve-root')
+    preserveRoot = true
+  else if (arg === '--no-preserve-root')
+    preserveRoot = false
+  else
+    return !!arg
+}).filter(arg => !preserveRoot || filterOutRoot(arg))
+
+const go = n => {
+  if (n >= args.length)
+    return
+  const options = noglob ? { glob: false } : {}
+  rimraf(args[n], options, er => {
+    if (er)
+      throw er
+    go(n+1)
+  })
+}
+
+if (help || args.length === 0) {
+  // If they didn't ask for help, then this is not a "success"
+  const log = help ? console.log : console.error
+  log('Usage: rimraf <path> [<path> ...]')
+  log('')
+  log('  Deletes all files and folders at "path" recursively.')
+  log('')
+  log('Options:')
+  log('')
+  log('  -h, --help          Display this usage info')
+  log('  -G, --no-glob       Do not expand glob patterns in arguments')
+  log('  -g, --glob          Expand glob patterns in arguments (default)')
+  log('  --preserve-root     Do not remove \'/\' (default)')
+  log('  --no-preserve-root  Do not treat \'/\' specially')
+  log('  --                  Stop parsing flags')
+  process.exit(help ? 0 : 1)
+} else
+  go(0)

server/node_modules/broadcast-channel/node_modules/rimraf/package.json

@@ -0,0 +1,32 @@
+{
+  "name": "rimraf",
+  "version": "3.0.2",
+  "main": "rimraf.js",
+  "description": "A deep deletion module for node (like `rm -rf`)",
+  "author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me/)",
+  "license": "ISC",
+  "repository": "git://github.com/isaacs/rimraf.git",
+  "scripts": {
+    "preversion": "npm test",
+    "postversion": "npm publish",
+    "postpublish": "git push origin --follow-tags",
+    "test": "tap test/*.js"
+  },
+  "bin": "./bin.js",
+  "dependencies": {
+    "glob": "^7.1.3"
+  },
+  "files": [
+    "LICENSE",
+    "README.md",
+    "bin.js",
+    "rimraf.js"
+  ],
+  "devDependencies": {
+    "mkdirp": "^0.5.1",
+    "tap": "^12.1.1"
+  },
+  "funding": {
+    "url": "https://github.com/sponsors/isaacs"
+  }
+}

server/node_modules/broadcast-channel/node_modules/rimraf/rimraf.js

@@ -0,0 +1,360 @@
+const assert = require("assert")
+const path = require("path")
+const fs = require("fs")
+let glob = undefined
+try {
+  glob = require("glob")
+} catch (_err) {
+  // treat glob as optional.
+}
+
+const defaultGlobOpts = {
+  nosort: true,
+  silent: true
+}
+
+// for EMFILE handling
+let timeout = 0
+
+const isWindows = (process.platform === "win32")
+
+const defaults = options => {
+  const methods = [
+    'unlink',
+    'chmod',
+    'stat',
+    'lstat',
+    'rmdir',
+    'readdir'
+  ]
+  methods.forEach(m => {
+    options[m] = options[m] || fs[m]
+    m = m + 'Sync'
+    options[m] = options[m] || fs[m]
+  })
+
+  options.maxBusyTries = options.maxBusyTries || 3
+  options.emfileWait = options.emfileWait || 1000
+  if (options.glob === false) {
+    options.disableGlob = true
+  }
+  if (options.disableGlob !== true && glob === undefined) {
+    throw Error('glob dependency not found, set `options.disableGlob = true` if intentional')
+  }
+  options.disableGlob = options.disableGlob || false
+  options.glob = options.glob || defaultGlobOpts
+}
+
+const rimraf = (p, options, cb) => {
+  if (typeof options === 'function') {
+    cb = options
+    options = {}
+  }
+
+  assert(p, 'rimraf: missing path')
+  assert.equal(typeof p, 'string', 'rimraf: path should be a string')
+  assert.equal(typeof cb, 'function', 'rimraf: callback function required')
+  assert(options, 'rimraf: invalid options argument provided')
+  assert.equal(typeof options, 'object', 'rimraf: options should be object')
+
+  defaults(options)
+
+  let busyTries = 0
+  let errState = null
+  let n = 0
+
+  const next = (er) => {
+    errState = errState || er
+    if (--n === 0)
+      cb(errState)
+  }
+
+  const afterGlob = (er, results) => {
+    if (er)
+      return cb(er)
+
+    n = results.length
+    if (n === 0)
+      return cb()
+
+    results.forEach(p => {
+      const CB = (er) => {
+        if (er) {
+          if ((er.code === "EBUSY" || er.code === "ENOTEMPTY" || er.code === "EPERM") &&
+              busyTries < options.maxBusyTries) {
+            busyTries ++
+            // try again, with the same exact callback as this one.
+            return setTimeout(() => rimraf_(p, options, CB), busyTries * 100)
+          }
+
+          // this one won't happen if graceful-fs is used.
+          if (er.code === "EMFILE" && timeout < options.emfileWait) {
+            return setTimeout(() => rimraf_(p, options, CB), timeout ++)
+          }
+
+          // already gone
+          if (er.code === "ENOENT") er = null
+        }
+
+        timeout = 0
+        next(er)
+      }
+      rimraf_(p, options, CB)
+    })
+  }
+
+  if (options.disableGlob || !glob.hasMagic(p))
+    return afterGlob(null, [p])
+
+  options.lstat(p, (er, stat) => {
+    if (!er)
+      return afterGlob(null, [p])
+
+    glob(p, options.glob, afterGlob)
+  })
+
+}
+
+// Two possible strategies.
+// 1. Assume it's a file.  unlink it, then do the dir stuff on EPERM or EISDIR
+// 2. Assume it's a directory.  readdir, then do the file stuff on ENOTDIR
+//
+// Both result in an extra syscall when you guess wrong.  However, there
+// are likely far more normal files in the world than directories.  This
+// is based on the assumption that a the average number of files per
+// directory is >= 1.
+//
+// If anyone ever complains about this, then I guess the strategy could
+// be made configurable somehow.  But until then, YAGNI.
+const rimraf_ = (p, options, cb) => {
+  assert(p)
+  assert(options)
+  assert(typeof cb === 'function')
+
+  // sunos lets the root user unlink directories, which is... weird.
+  // so we have to lstat here and make sure it's not a dir.
+  options.lstat(p, (er, st) => {
+    if (er && er.code === "ENOENT")
+      return cb(null)
+
+    // Windows can EPERM on stat.  Life is suffering.
+    if (er && er.code === "EPERM" && isWindows)
+      fixWinEPERM(p, options, er, cb)
+
+    if (st && st.isDirectory())
+      return rmdir(p, options, er, cb)
+
+    options.unlink(p, er => {
+      if (er) {
+        if (er.code === "ENOENT")
+          return cb(null)
+        if (er.code === "EPERM")
+          return (isWindows)
+            ? fixWinEPERM(p, options, er, cb)
+            : rmdir(p, options, er, cb)
+        if (er.code === "EISDIR")
+          return rmdir(p, options, er, cb)
+      }
+      return cb(er)
+    })
+  })
+}
+
+const fixWinEPERM = (p, options, er, cb) => {
+  assert(p)
+  assert(options)
+  assert(typeof cb === 'function')
+
+  options.chmod(p, 0o666, er2 => {
+    if (er2)
+      cb(er2.code === "ENOENT" ? null : er)
+    else
+      options.stat(p, (er3, stats) => {
+        if (er3)
+          cb(er3.code === "ENOENT" ? null : er)
+        else if (stats.isDirectory())
+          rmdir(p, options, er, cb)
+        else
+          options.unlink(p, cb)
+      })
+  })
+}
+
+const fixWinEPERMSync = (p, options, er) => {
+  assert(p)
+  assert(options)
+
+  try {
+    options.chmodSync(p, 0o666)
+  } catch (er2) {
+    if (er2.code === "ENOENT")
+      return
+    else
+      throw er
+  }
+
+  let stats
+  try {
+    stats = options.statSync(p)
+  } catch (er3) {
+    if (er3.code === "ENOENT")
+      return
+    else
+      throw er
+  }
+
+  if (stats.isDirectory())
+    rmdirSync(p, options, er)
+  else
+    options.unlinkSync(p)
+}
+
+const rmdir = (p, options, originalEr, cb) => {
+  assert(p)
+  assert(options)
+  assert(typeof cb === 'function')
+
+  // try to rmdir first, and only readdir on ENOTEMPTY or EEXIST (SunOS)
+  // if we guessed wrong, and it's not a directory, then
+  // raise the original error.
+  options.rmdir(p, er => {
+    if (er && (er.code === "ENOTEMPTY" || er.code === "EEXIST" || er.code === "EPERM"))
+      rmkids(p, options, cb)
+    else if (er && er.code === "ENOTDIR")
+      cb(originalEr)
+    else
+      cb(er)
+  })
+}
+
+const rmkids = (p, options, cb) => {
+  assert(p)
+  assert(options)
+  assert(typeof cb === 'function')
+
+  options.readdir(p, (er, files) => {
+    if (er)
+      return cb(er)
+    let n = files.length
+    if (n === 0)
+      return options.rmdir(p, cb)
+    let errState
+    files.forEach(f => {
+      rimraf(path.join(p, f), options, er => {
+        if (errState)
+          return
+        if (er)
+          return cb(errState = er)
+        if (--n === 0)
+          options.rmdir(p, cb)
+      })
+    })
+  })
+}
+
+// this looks simpler, and is strictly *faster*, but will
+// tie up the JavaScript thread and fail on excessively
+// deep directory trees.
+const rimrafSync = (p, options) => {
+  options = options || {}
+  defaults(options)
+
+  assert(p, 'rimraf: missing path')
+  assert.equal(typeof p, 'string', 'rimraf: path should be a string')
+  assert(options, 'rimraf: missing options')
+  assert.equal(typeof options, 'object', 'rimraf: options should be object')
+
+  let results
+
+  if (options.disableGlob || !glob.hasMagic(p)) {
+    results = [p]
+  } else {
+    try {
+      options.lstatSync(p)
+      results = [p]
+    } catch (er) {
+      results = glob.sync(p, options.glob)
+    }
+  }
+
+  if (!results.length)
+    return
+
+  for (let i = 0; i < results.length; i++) {
+    const p = results[i]
+
+    let st
+    try {
+      st = options.lstatSync(p)
+    } catch (er) {
+      if (er.code === "ENOENT")
+        return
+
+      // Windows can EPERM on stat.  Life is suffering.
+      if (er.code === "EPERM" && isWindows)
+        fixWinEPERMSync(p, options, er)
+    }
+
+    try {
+      // sunos lets the root user unlink directories, which is... weird.
+      if (st && st.isDirectory())
+        rmdirSync(p, options, null)
+      else
+        options.unlinkSync(p)
+    } catch (er) {
+      if (er.code === "ENOENT")
+        return
+      if (er.code === "EPERM")
+        return isWindows ? fixWinEPERMSync(p, options, er) : rmdirSync(p, options, er)
+      if (er.code !== "EISDIR")
+        throw er
+
+      rmdirSync(p, options, er)
+    }
+  }
+}
+
+const rmdirSync = (p, options, originalEr) => {
+  assert(p)
+  assert(options)
+
+  try {
+    options.rmdirSync(p)
+  } catch (er) {
+    if (er.code === "ENOENT")
+      return
+    if (er.code === "ENOTDIR")
+      throw originalEr
+    if (er.code === "ENOTEMPTY" || er.code === "EEXIST" || er.code === "EPERM")
+      rmkidsSync(p, options)
+  }
+}
+
+const rmkidsSync = (p, options) => {
+  assert(p)
+  assert(options)
+  options.readdirSync(p).forEach(f => rimrafSync(path.join(p, f), options))
+
+  // We only end up here once we got ENOTEMPTY at least once, and
+  // at this point, we are guaranteed to have removed all the kids.
+  // So, we know that it won't be ENOENT or ENOTDIR or anything else.
+  // try really hard to delete stuff on windows, because it has a
+  // PROFOUNDLY annoying habit of not closing handles promptly when
+  // files are deleted, resulting in spurious ENOTEMPTY errors.
+  const retries = isWindows ? 100 : 1
+  let i = 0
+  do {
+    let threw = true
+    try {
+      const ret = options.rmdirSync(p, options)
+      threw = false
+      return ret
+    } finally {
+      if (++i < retries && threw)
+        continue
+    }
+  } while (true)
+}
+
+module.exports = rimraf
+rimraf.sync = rimrafSync

server/node_modules/broadcast-channel/package.json

@@ -0,0 +1,131 @@
+{
+  "name": "broadcast-channel",
+  "version": "3.7.0",
+  "description": "A BroadcastChannel that works in New Browsers, Old Browsers, WebWorkers and NodeJs",
+  "homepage": "https://github.com/pubkey/broadcast-channel#readme",
+  "keywords": [
+    "broadcast-channel",
+    "broadcastchannel",
+    "broadcast",
+    "polyfill",
+    "localstorage",
+    "indexeddb",
+    "postMessage",
+    "crosstab",
+    "ipc",
+    "leader-election"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/pubkey/broadcast-channel.git"
+  },
+  "author": "pubkey",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/pubkey/broadcast-channel/issues"
+  },
+  "main": "./dist/lib/index.es5.js",
+  "jsnext:main": "./dist/es/index.js",
+  "module": "./dist/es/index.js",
+  "sideEffects": false,
+  "types": "./types/index.d.ts",
+  "scripts": {
+    "test": "echo \"RUN ALL:\" && npm run test:node && npm run test:browser && npm run test:e2e",
+    "test:node": "npm run build && mocha ./test/index.test.js -b --timeout 6000 --exit",
+    "test:node:loop": "npm run test:node && npm run test:node:loop",
+    "test:browser": "npm run build && karma start ./config/karma.conf.js --single-run",
+    "test:e2e": "concurrently \"npm run docs:serve\" \"sleep 20 && testcafe -b && testcafe chrome -e test/e2e.test.js --hostname localhost\" --kill-others --success first",
+    "test:typings": "npm run build && mocha ./test/typings.test.js -b --timeout 12000 --exit",
+    "test:performance": "npm run build && mocha ./test/performance.test.js -b --timeout 24000 --exit",
+    "test:simple": "npm run build && node ./test_tmp/simple.test.js",
+    "test:electron": "(cd ./test-electron && npm run test)",
+    "size:prewebpack": "npm run build && cross-env NODE_ENV=build webpack --config ./config/webpack.config.js",
+    "size:webpack": "npm run size:prewebpack && echo \"Build-Size Webpack (minified+gzip):\" && gzip-size --raw ./test_tmp/webpack.bundle.js",
+    "size:browserify": "npm run build && rimraf test_tmp/browserify.js && browserify --no-builtins dist/lib/browserify.index.js > test_tmp/browserify.js && uglifyjs --compress --mangle --output test_tmp/browserify.min.js -- test_tmp/browserify.js && echo \"Build-Size browserify (minified+gzip):\" && gzip-size --raw test_tmp/browserify.min.js",
+    "size:rollup": "npm run build && rollup --config ./config/rollup.config.js && echo \"Build-Size Rollup (minified+gzip):\" && gzip-size --raw ./test_tmp/rollup.bundle.js",
+    "lint": "eslint src test config",
+    "clear": "rimraf -rf ./dist && rimraf -rf ./gen",
+    "build:es6": "rimraf -rf dist/es && cross-env NODE_ENV=es6 babel src --out-dir dist/es",
+    "build:es5": "cross-env NODE_ENV=es5 babel src --out-dir dist/lib",
+    "build:test": "cross-env NODE_ENV=es5 babel test --out-dir test_tmp",
+    "build:index": "browserify test_tmp/scripts/index.js > docs/index.js",
+    "build:browser": "browserify test_tmp/scripts/e2e.js > docs/e2e.js",
+    "build:worker": "browserify test_tmp/scripts/worker.js > docs/worker.js",
+    "build:iframe": "browserify test_tmp/scripts/iframe.js > docs/iframe.js",
+    "build:leader-iframe": "browserify test_tmp/scripts/leader-iframe.js > docs/leader-iframe.js",
+    "build:lib-browser": "browserify dist/lib/browserify.index.js > dist/lib/browser.js",
+    "build:lib-browser:min": "uglifyjs --compress --mangle --output dist/lib/browser.min.js -- dist/lib/browser.js",
+    "build": "npm run clear && concurrently \"npm run build:es6\" \"npm run build:es5\" \"npm run build:test\" && concurrently \"npm run build:index\" \"npm run build:browser\" \"npm run build:worker\" \"npm run build:iframe\" \"npm run build:leader-iframe\" && npm run build:lib-browser && npm run build:lib-browser:min",
+    "build:min": "uglifyjs --compress --mangle --output dist/lib/browserify.min.js -- dist/lib/browserify.index.js",
+    "docs:only": "http-server ./docs --silent",
+    "docs:serve": "npm run build && echo \"Open http://localhost:8080/\" && npm run docs:only"
+  },
+  "pre-commit": [
+    "lint"
+  ],
+  "dependencies": {
+    "@babel/runtime": "^7.7.2",
+    "detect-node": "^2.1.0",
+    "js-sha3": "0.8.0",
+    "microseconds": "0.2.0",
+    "nano-time": "1.0.0",
+    "oblivious-set": "1.0.0",
+    "rimraf": "3.0.2",
+    "unload": "2.2.0"
+  },
+  "devDependencies": {
+    "@babel/cli": "7.14.3",
+    "@babel/core": "7.14.3",
+    "@babel/plugin-proposal-object-rest-spread": "7.14.4",
+    "@babel/plugin-transform-member-expression-literals": "7.12.13",
+    "@babel/plugin-transform-property-literals": "7.12.13",
+    "@babel/plugin-transform-runtime": "7.14.3",
+    "@babel/polyfill": "7.12.1",
+    "@babel/preset-env": "7.14.4",
+    "@babel/types": "7.14.4",
+    "@types/core-js": "2.5.4",
+    "assert": "2.0.0",
+    "async-test-util": "1.7.3",
+    "browserify": "17.0.0",
+    "child-process-promise": "2.2.1",
+    "clone": "2.1.2",
+    "concurrently": "6.2.0",
+    "convert-hrtime": "5.0.0",
+    "copyfiles": "2.4.1",
+    "cross-env": "7.0.3",
+    "eslint": "7.27.0",
+    "gzip-size-cli": "5.0.0",
+    "http-server": "0.12.3",
+    "jest": "27.0.3",
+    "karma": "6.3.3",
+    "karma-babel-preprocessor": "8.0.1",
+    "karma-browserify": "8.0.0",
+    "karma-chrome-launcher": "3.1.0",
+    "karma-coverage": "2.0.3",
+    "karma-detect-browsers": "2.3.3",
+    "karma-edge-launcher": "0.4.2",
+    "karma-firefox-launcher": "2.1.1",
+    "karma-ie-launcher": "1.0.0",
+    "karma-mocha": "2.0.1",
+    "karma-opera-launcher": "1.0.0",
+    "karma-safari-launcher": "1.0.0",
+    "mocha": "8.4.0",
+    "pre-commit": "1.2.2",
+    "random-int": "3.0.0",
+    "random-token": "0.0.8",
+    "rollup": "2.50.5",
+    "rollup-plugin-node-resolve": "5.2.0",
+    "rollup-plugin-uglify": "6.0.4",
+    "testcafe": "1.14.2",
+    "ts-node": "10.0.0",
+    "typescript": "4.3.2",
+    "watchify": "4.0.0",
+    "webpack": "5.38.1",
+    "webpack-cli": "4.7.0"
+  },
+  "browser": {
+    "./src/methods/node.js": false,
+    "./dist/es/methods/node.js": false,
+    "./dist/lib/methods/node.js": false
+  }
+}

server/node_modules/broadcast-channel/src/broadcast-channel.js

@@ -0,0 +1,272 @@
+import {
+    isPromise
+} from './util.js';
+
+import {
+    chooseMethod
+} from './method-chooser.js';
+
+import {
+    fillOptionsWithDefaults
+} from './options.js';
+
+
+export const BroadcastChannel = function (name, options) {
+    this.name = name;
+
+    if (ENFORCED_OPTIONS) {
+        options = ENFORCED_OPTIONS;
+    }
+    this.options = fillOptionsWithDefaults(options);
+
+    this.method = chooseMethod(this.options);
+
+    // isListening
+    this._iL = false;
+
+    /**
+     * _onMessageListener
+     * setting onmessage twice,
+     * will overwrite the first listener
+     */
+    this._onML = null;
+
+    /**
+     * _addEventListeners
+     */
+    this._addEL = {
+        message: [],
+        internal: []
+    };
+
+    /**
+     * Unsend message promises
+     * where the sending is still in progress
+     * @type {Set<Promise>}
+     */
+    this._uMP = new Set();
+
+    /**
+     * _beforeClose
+     * array of promises that will be awaited
+     * before the channel is closed
+     */
+    this._befC = [];
+
+    /**
+     * _preparePromise
+     */
+    this._prepP = null;
+    _prepareChannel(this);
+};
+
+// STATICS
+
+/**
+ * used to identify if someone overwrites
+ * window.BroadcastChannel with this
+ * See methods/native.js
+ */
+BroadcastChannel._pubkey = true;
+
+/**
+ * clears the tmp-folder if is node
+ * @return {Promise<boolean>} true if has run, false if not node
+ */
+export function clearNodeFolder(options) {
+    options = fillOptionsWithDefaults(options);
+    const method = chooseMethod(options);
+    if (method.type === 'node') {
+        return method.clearNodeFolder().then(() => true);
+    } else {
+        return Promise.resolve(false);
+    }
+}
+
+/**
+ * if set, this method is enforced,
+ * no mather what the options are
+ */
+let ENFORCED_OPTIONS;
+export function enforceOptions(options) {
+    ENFORCED_OPTIONS = options;
+}
+
+
+// PROTOTYPE
+BroadcastChannel.prototype = {
+    postMessage(msg) {
+        if (this.closed) {
+            throw new Error(
+                'BroadcastChannel.postMessage(): ' +
+                'Cannot post message after channel has closed'
+            );
+        }
+        return _post(this, 'message', msg);
+    },
+    postInternal(msg) {
+        return _post(this, 'internal', msg);
+    },
+    set onmessage(fn) {
+        const time = this.method.microSeconds();
+        const listenObj = {
+            time,
+            fn
+        };
+        _removeListenerObject(this, 'message', this._onML);
+        if (fn && typeof fn === 'function') {
+            this._onML = listenObj;
+            _addListenerObject(this, 'message', listenObj);
+        } else {
+            this._onML = null;
+        }
+    },
+
+    addEventListener(type, fn) {
+        const time = this.method.microSeconds();
+        const listenObj = {
+            time,
+            fn
+        };
+        _addListenerObject(this, type, listenObj);
+    },
+    removeEventListener(type, fn) {
+        const obj = this._addEL[type].find(obj => obj.fn === fn);
+        _removeListenerObject(this, type, obj);
+    },
+
+    close() {
+        if (this.closed) {
+            return;
+        }
+        this.closed = true;
+        const awaitPrepare = this._prepP ? this._prepP : Promise.resolve();
+
+        this._onML = null;
+        this._addEL.message = [];
+
+        return awaitPrepare
+            // wait until all current sending are processed
+            .then(() => Promise.all(Array.from(this._uMP)))
+            // run before-close hooks
+            .then(() => Promise.all(this._befC.map(fn => fn())))
+            // close the channel
+            .then(() => this.method.close(this._state));
+    },
+    get type() {
+        return this.method.type;
+    },
+    get isClosed() {
+        return this.closed;
+    }
+};
+
+
+/**
+ * Post a message over the channel
+ * @returns {Promise} that resolved when the message sending is done
+ */
+function _post(broadcastChannel, type, msg) {
+    const time = broadcastChannel.method.microSeconds();
+    const msgObj = {
+        time,
+        type,
+        data: msg
+    };
+
+    const awaitPrepare = broadcastChannel._prepP ? broadcastChannel._prepP : Promise.resolve();
+    return awaitPrepare.then(() => {
+
+        const sendPromise = broadcastChannel.method.postMessage(
+            broadcastChannel._state,
+            msgObj
+        );
+
+        // add/remove to unsend messages list
+        broadcastChannel._uMP.add(sendPromise);
+        sendPromise
+        .catch()
+        .then(() => broadcastChannel._uMP.delete(sendPromise));
+
+        return sendPromise;
+    });
+}
+
+function _prepareChannel(channel) {
+    const maybePromise = channel.method.create(channel.name, channel.options);
+    if (isPromise(maybePromise)) {
+        channel._prepP = maybePromise;
+        maybePromise.then(s => {
+            // used in tests to simulate slow runtime
+            /*if (channel.options.prepareDelay) {
+                 await new Promise(res => setTimeout(res, this.options.prepareDelay));
+            }*/
+            channel._state = s;
+        });
+    } else {
+        channel._state = maybePromise;
+    }
+}
+
+
+function _hasMessageListeners(channel) {
+    if (channel._addEL.message.length > 0) return true;
+    if (channel._addEL.internal.length > 0) return true;
+    return false;
+}
+
+function _addListenerObject(channel, type, obj) {
+    channel._addEL[type].push(obj);
+    _startListening(channel);
+}
+
+function _removeListenerObject(channel, type, obj) {
+    channel._addEL[type] = channel._addEL[type].filter(o => o !== obj);
+    _stopListening(channel);
+}
+
+function _startListening(channel) {
+    if (!channel._iL && _hasMessageListeners(channel)) {
+        // someone is listening, start subscribing
+
+        const listenerFn = msgObj => {
+            channel._addEL[msgObj.type].forEach(obj => {
+                if (msgObj.time >= obj.time) {
+                    obj.fn(msgObj.data);
+                }
+            });
+        };
+
+        const time = channel.method.microSeconds();
+        if (channel._prepP) {
+            channel._prepP.then(() => {
+                channel._iL = true;
+                channel.method.onMessage(
+                    channel._state,
+                    listenerFn,
+                    time
+                );
+            });
+        } else {
+            channel._iL = true;
+            channel.method.onMessage(
+                channel._state,
+                listenerFn,
+                time
+            );
+        }
+    }
+}
+
+function _stopListening(channel) {
+    if (channel._iL && !_hasMessageListeners(channel)) {
+        // noone is listening, stop subscribing
+        channel._iL = false;
+        const time = channel.method.microSeconds();
+        channel.method.onMessage(
+            channel._state,
+            null,
+            time
+        );
+    }
+}

server/node_modules/broadcast-channel/src/browserify.index.js

@@ -0,0 +1,6 @@
+const module = require('./index.es5.js');
+const BroadcastChannel = module.BroadcastChannel;
+const createLeaderElection = module.createLeaderElection;
+
+window['BroadcastChannel2'] = BroadcastChannel;
+window['createLeaderElection'] = createLeaderElection;

server/node_modules/broadcast-channel/src/index.es5.js

@@ -0,0 +1,24 @@
+/**
+ * because babel can only export on default-attribute,
+ * we use this for the non-module-build
+ * this ensures that users do not have to use
+ * var BroadcastChannel = require('broadcast-channel').default;
+ * but
+ * var BroadcastChannel = require('broadcast-channel');
+ */
+
+import {
+    BroadcastChannel,
+    createLeaderElection,
+    clearNodeFolder,
+    enforceOptions,
+    beLeader
+} from './index.js';
+
+module.exports = {
+    BroadcastChannel,
+    createLeaderElection,
+    clearNodeFolder,
+    enforceOptions,
+    beLeader
+};

server/node_modules/broadcast-channel/src/index.js

@@ -0,0 +1,9 @@
+export {
+    BroadcastChannel,
+    clearNodeFolder,
+    enforceOptions
+} from './broadcast-channel';
+export {
+    createLeaderElection,
+    beLeader
+} from './leader-election';

server/node_modules/broadcast-channel/src/leader-election.js

@@ -0,0 +1,230 @@
+import {
+    sleep,
+    randomToken
+} from './util.js';
+
+import unload from 'unload';
+
+const LeaderElection = function (channel, options) {
+    this._channel = channel;
+    this._options = options;
+
+    this.isLeader = false;
+    this.isDead = false;
+    this.token = randomToken();
+
+    this._isApl = false; // _isApplying
+    this._reApply = false;
+
+    // things to clean up
+    this._unl = []; // _unloads
+    this._lstns = []; // _listeners
+    this._invs = []; // _intervals
+    this._dpL = () => { }; // onduplicate listener
+    this._dpLC = false; // true when onduplicate called
+};
+
+LeaderElection.prototype = {
+    applyOnce() {
+        if (this.isLeader) return Promise.resolve(false);
+        if (this.isDead) return Promise.resolve(false);
+
+        // do nothing if already running
+        if (this._isApl) {
+            this._reApply = true;
+            return Promise.resolve(false);
+        }
+        this._isApl = true;
+
+        let stopCriteria = false;
+        const recieved = [];
+
+        const handleMessage = (msg) => {
+            if (msg.context === 'leader' && msg.token != this.token) {
+                recieved.push(msg);
+
+                if (msg.action === 'apply') {
+                    // other is applying
+                    if (msg.token > this.token) {
+                        // other has higher token, stop applying
+                        stopCriteria = true;
+                    }
+                }
+
+                if (msg.action === 'tell') {
+                    // other is already leader
+                    stopCriteria = true;
+                }
+            }
+        };
+        this._channel.addEventListener('internal', handleMessage);
+
+
+
+        const ret = _sendMessage(this, 'apply') // send out that this one is applying
+            .then(() => sleep(this._options.responseTime)) // let others time to respond
+            .then(() => {
+                if (stopCriteria) return Promise.reject(new Error());
+                else return _sendMessage(this, 'apply');
+            })
+            .then(() => sleep(this._options.responseTime)) // let others time to respond
+            .then(() => {
+                if (stopCriteria) return Promise.reject(new Error());
+                else return _sendMessage(this);
+            })
+            .then(() => beLeader(this)) // no one disagreed -> this one is now leader
+            .then(() => true)
+            .catch(() => false) // apply not successfull
+            .then(success => {
+                this._channel.removeEventListener('internal', handleMessage);
+                this._isApl = false;
+                if (!success && this._reApply) {
+                    this._reApply = false;
+                    return this.applyOnce();
+                } else return success;
+            });
+        return ret;
+    },
+
+    awaitLeadership() {
+        if (
+            /* _awaitLeadershipPromise */
+            !this._aLP
+        ) {
+            this._aLP = _awaitLeadershipOnce(this);
+        }
+        return this._aLP;
+    },
+
+    set onduplicate(fn) {
+        this._dpL = fn;
+    },
+
+    die() {
+        if (this.isDead) return;
+        this.isDead = true;
+
+        this._lstns.forEach(listener => this._channel.removeEventListener('internal', listener));
+        this._invs.forEach(interval => clearInterval(interval));
+        this._unl.forEach(uFn => {
+            uFn.remove();
+        });
+        return _sendMessage(this, 'death');
+    }
+};
+
+function _awaitLeadershipOnce(leaderElector) {
+    if (leaderElector.isLeader) return Promise.resolve();
+
+    return new Promise((res) => {
+        let resolved = false;
+
+        function finish() {
+            if (resolved) {
+                return;
+            }
+            resolved = true;
+            clearInterval(interval);
+            leaderElector._channel.removeEventListener('internal', whenDeathListener);
+            res(true);
+        }
+
+        // try once now
+        leaderElector.applyOnce().then(() => {
+            if (leaderElector.isLeader) {
+                finish();
+            }
+        });
+
+        // try on fallbackInterval
+        const interval = setInterval(() => {
+            leaderElector.applyOnce().then(() => {
+                if (leaderElector.isLeader) {
+                    finish();
+                }
+            });
+        }, leaderElector._options.fallbackInterval);
+        leaderElector._invs.push(interval);
+
+        // try when other leader dies
+        const whenDeathListener = msg => {
+            if (msg.context === 'leader' && msg.action === 'death') {
+                leaderElector.applyOnce().then(() => {
+                    if (leaderElector.isLeader) finish();
+                });
+            }
+        };
+        leaderElector._channel.addEventListener('internal', whenDeathListener);
+        leaderElector._lstns.push(whenDeathListener);
+    });
+}
+
+/**
+ * sends and internal message over the broadcast-channel
+ */
+function _sendMessage(leaderElector, action) {
+    const msgJson = {
+        context: 'leader',
+        action,
+        token: leaderElector.token
+    };
+    return leaderElector._channel.postInternal(msgJson);
+}
+
+export function beLeader(leaderElector) {
+    leaderElector.isLeader = true;
+    const unloadFn = unload.add(() => leaderElector.die());
+    leaderElector._unl.push(unloadFn);
+
+    const isLeaderListener = msg => {
+        if (msg.context === 'leader' && msg.action === 'apply') {
+            _sendMessage(leaderElector, 'tell');
+        }
+
+        if (msg.context === 'leader' && msg.action === 'tell' && !leaderElector._dpLC) {
+            /**
+             * another instance is also leader!
+             * This can happen on rare events
+             * like when the CPU is at 100% for long time
+             * or the tabs are open very long and the browser throttles them.
+             * @link https://github.com/pubkey/broadcast-channel/issues/414
+             * @link https://github.com/pubkey/broadcast-channel/issues/385
+             */
+            leaderElector._dpLC = true;
+            leaderElector._dpL(); // message the lib user so the app can handle the problem
+            _sendMessage(leaderElector, 'tell'); // ensure other leader also knows the problem
+        }
+    };
+    leaderElector._channel.addEventListener('internal', isLeaderListener);
+    leaderElector._lstns.push(isLeaderListener);
+    return _sendMessage(leaderElector, 'tell');
+}
+
+
+function fillOptionsWithDefaults(options, channel) {
+    if (!options) options = {};
+    options = JSON.parse(JSON.stringify(options));
+
+    if (!options.fallbackInterval) {
+        options.fallbackInterval = 3000;
+    }
+
+    if (!options.responseTime) {
+        options.responseTime = channel.method.averageResponseTime(channel.options);
+    }
+
+    return options;
+}
+
+export function createLeaderElection(channel, options) {
+    if (channel._leaderElector) {
+        throw new Error('BroadcastChannel already has a leader-elector');
+    }
+
+    options = fillOptionsWithDefaults(options, channel);
+    const elector = new LeaderElection(channel, options);
+    channel._befC.push(() => elector.die());
+
+    channel._leaderElector = elector;
+    return elector;
+}

server/node_modules/broadcast-channel/src/method-chooser.js

@@ -0,0 +1,72 @@
+import NativeMethod from './methods/native.js';
+import IndexeDbMethod from './methods/indexed-db.js';
+import LocalstorageMethod from './methods/localstorage.js';
+import SimulateMethod from './methods/simulate.js';
+
+import {
+    isNode
+} from './util';
+
+// order is important
+const METHODS = [
+    NativeMethod, // fastest
+    IndexeDbMethod,
+    LocalstorageMethod
+];
+
+/**
+ * The NodeMethod is loaded lazy
+ * so it will not get bundled in browser-builds
+ */
+if (isNode) {
+
+    /**
+     * we use the non-transpiled code for nodejs
+     * because it runs faster
+     */
+    const NodeMethod = require(
+        '../../src/methods/' +
+        // use this hack so that browserify and others
+        // do not import the node-method by default
+        // when bundling.
+        'node.js'
+    );
+
+    /**
+     * this will be false for webpackbuilds
+     * which will shim the node-method with an empty object {}
+     */
+    if (typeof NodeMethod.canBeUsed === 'function') {
+        METHODS.push(NodeMethod);
+    }
+}
+
+
+export function chooseMethod(options) {
+    let chooseMethods = [].concat(options.methods, METHODS).filter(Boolean);
+
+    // directly chosen
+    if (options.type) {
+        if (options.type === 'simulate') {
+            // only use simulate-method if directly chosen
+            return SimulateMethod;
+        }
+        const ret = chooseMethods.find(m => m.type === options.type);
+        if (!ret) throw new Error('method-type ' + options.type + ' not found');
+        else return ret;
+    }
+
+    /**
+     * if no webworker support is needed,
+     * remove idb from the list so that localstorage is been chosen
+     */
+    if (!options.webWorkerSupport && !isNode) {
+        chooseMethods = chooseMethods.filter(m => m.type !== 'idb');
+    }
+
+    const useMethod = chooseMethods.find(method => method.canBeUsed());
+    if (!useMethod)
+        throw new Error('No useable methode found:' + JSON.stringify(METHODS.map(m => m.type)));
+    else
+        return useMethod;
+}

server/node_modules/broadcast-channel/src/methods/cookies.js

@@ -0,0 +1,4 @@
+/**
+ * if you really need this method,
+ * implement it
+ */

server/node_modules/broadcast-channel/src/methods/indexed-db.js

@@ -0,0 +1,332 @@
+/**
+ * this method uses indexeddb to store the messages
+ * There is currently no observerAPI for idb
+ * @link https://github.com/w3c/IndexedDB/issues/51
+ */
+
+import {
+    sleep,
+    randomInt,
+    randomToken,
+    microSeconds as micro,
+    isNode
+} from '../util.js';
+
+export const microSeconds = micro;
+import { ObliviousSet } from 'oblivious-set';
+
+import {
+    fillOptionsWithDefaults
+} from '../options';
+
+const DB_PREFIX = 'pubkey.broadcast-channel-0-';
+const OBJECT_STORE_ID = 'messages';
+
+export const type = 'idb';
+
+export function getIdb() {
+    if (typeof indexedDB !== 'undefined') return indexedDB;
+    if (typeof window !== 'undefined') {
+        if (typeof window.mozIndexedDB !== 'undefined') return window.mozIndexedDB;
+        if (typeof window.webkitIndexedDB !== 'undefined') return window.webkitIndexedDB;
+        if (typeof window.msIndexedDB !== 'undefined') return window.msIndexedDB;
+    }
+
+    return false;
+}
+
+export function createDatabase(channelName) {
+    const IndexedDB = getIdb();
+
+    // create table
+    const dbName = DB_PREFIX + channelName;
+    const openRequest = IndexedDB.open(dbName, 1);
+
+    openRequest.onupgradeneeded = ev => {
+        const db = ev.target.result;
+        db.createObjectStore(OBJECT_STORE_ID, {
+            keyPath: 'id',
+            autoIncrement: true
+        });
+    };
+    const dbPromise = new Promise((res, rej) => {
+        openRequest.onerror = ev => rej(ev);
+        openRequest.onsuccess = () => {
+            res(openRequest.result);
+        };
+    });
+
+    return dbPromise;
+}
+
+/**
+ * writes the new message to the database
+ * so other readers can find it
+ */
+export function writeMessage(db, readerUuid, messageJson) {
+    const time = new Date().getTime();
+    const writeObject = {
+        uuid: readerUuid,
+        time,
+        data: messageJson
+    };
+
+    const transaction = db.transaction([OBJECT_STORE_ID], 'readwrite');
+
+    return new Promise((res, rej) => {
+        transaction.oncomplete = () => res();
+        transaction.onerror = ev => rej(ev);
+
+        const objectStore = transaction.objectStore(OBJECT_STORE_ID);
+        objectStore.add(writeObject);
+    });
+}
+
+export function getAllMessages(db) {
+    const objectStore = db.transaction(OBJECT_STORE_ID).objectStore(OBJECT_STORE_ID);
+    const ret = [];
+    return new Promise(res => {
+        objectStore.openCursor().onsuccess = ev => {
+            const cursor = ev.target.result;
+            if (cursor) {
+                ret.push(cursor.value);
+                //alert("Name for SSN " + cursor.key + " is " + cursor.value.name);
+                cursor.continue();
+            } else {
+                res(ret);
+            }
+        };
+    });
+}
+
+export function getMessagesHigherThan(db, lastCursorId) {
+    const objectStore = db.transaction(OBJECT_STORE_ID).objectStore(OBJECT_STORE_ID);
+    const ret = [];
+
+    function openCursor() {
+        // Occasionally Safari will fail on IDBKeyRange.bound, this
+        // catches that error, having it open the cursor to the first
+        // item. When it gets data it will advance to the desired key.
+        try {
+            const keyRangeValue = IDBKeyRange.bound(lastCursorId + 1, Infinity);
+            return objectStore.openCursor(keyRangeValue);
+        } catch (e) {
+            return objectStore.openCursor();
+        }
+    }
+
+    return new Promise(res => {
+        openCursor().onsuccess = ev => {
+            const cursor = ev.target.result;
+            if (cursor) {
+                if (cursor.value.id < lastCursorId + 1) {
+                    cursor.continue(lastCursorId + 1);
+                } else {
+                    ret.push(cursor.value);
+                    cursor.continue();
+                }
+            } else {
+                res(ret);
+            }
+        };
+    });
+}
+
+export function removeMessageById(db, id) {
+    const request = db.transaction([OBJECT_STORE_ID], 'readwrite')
+        .objectStore(OBJECT_STORE_ID)
+        .delete(id);
+    return new Promise(res => {
+        request.onsuccess = () => res();
+    });
+}
+
+export function getOldMessages(db, ttl) {
+    const olderThen = new Date().getTime() - ttl;
+    const objectStore = db.transaction(OBJECT_STORE_ID).objectStore(OBJECT_STORE_ID);
+    const ret = [];
+    return new Promise(res => {
+        objectStore.openCursor().onsuccess = ev => {
+            const cursor = ev.target.result;
+            if (cursor) {
+                const msgObk = cursor.value;
+                if (msgObk.time < olderThen) {
+                    ret.push(msgObk);
+                    //alert("Name for SSN " + cursor.key + " is " + cursor.value.name);
+                    cursor.continue();
+                } else {
+                    // no more old messages,
+                    res(ret);
+                    return;
+                }
+            } else {
+                res(ret);
+            }
+        };
+    });
+}
+
+export function cleanOldMessages(db, ttl) {
+    return getOldMessages(db, ttl)
+        .then(tooOld => {
+            return Promise.all(
+                tooOld.map(msgObj => removeMessageById(db, msgObj.id))
+            );
+        });
+}
+
+export function create(channelName, options) {
+    options = fillOptionsWithDefaults(options);
+
+    return createDatabase(channelName).then(db => {
+        const state = {
+            closed: false,
+            lastCursorId: 0,
+            channelName,
+            options,
+            uuid: randomToken(),
+            /**
+             * emittedMessagesIds
+             * contains all messages that have been emitted before
+             * @type {ObliviousSet}
+             */
+            eMIs: new ObliviousSet(options.idb.ttl * 2),
+            // ensures we do not read messages in parrallel
+            writeBlockPromise: Promise.resolve(),
+            messagesCallback: null,
+            readQueuePromises: [],
+            db
+        };
+
+        /**
+         * Handle abrupt closes that do not originate from db.close().
+         * This could happen, for example, if the underlying storage is
+         * removed or if the user clears the database in the browser's
+         * history preferences.
+         */
+        db.onclose = function () {
+            state.closed = true;
+
+            if (options.idb.onclose) options.idb.onclose();
+        };
+
+        /**
+         * if service-workers are used,
+         * we have no 'storage'-event if they post a message,
+         * therefore we also have to set an interval
+         */
+        _readLoop(state);
+
+        return state;
+    });
+}
+
+function _readLoop(state) {
+    if (state.closed) return;
+
+    readNewMessages(state)
+        .then(() => sleep(state.options.idb.fallbackInterval))
+        .then(() => _readLoop(state));
+}
+
+
+function _filterMessage(msgObj, state) {
+    if (msgObj.uuid === state.uuid) return false; // send by own
+    if (state.eMIs.has(msgObj.id)) return false; // already emitted
+    if (msgObj.data.time < state.messagesCallbackTime) return false; // older then onMessageCallback
+    return true;
+}
+
+/**
+ * reads all new messages from the database and emits them
+ */
+function readNewMessages(state) {
+
+    // channel already closed
+    if (state.closed) return Promise.resolve();
+
+    // if no one is listening, we do not need to scan for new messages
+    if (!state.messagesCallback) return Promise.resolve();
+
+    return getMessagesHigherThan(state.db, state.lastCursorId)
+        .then(newerMessages => {
+            const useMessages = newerMessages
+                /**
+                 * there is a bug in iOS where the msgObj can be undefined some times
+                 * so we filter them out
+                 * @link https://github.com/pubkey/broadcast-channel/issues/19
+                 */
+                .filter(msgObj => !!msgObj)
+                .map(msgObj => {
+                    if (msgObj.id > state.lastCursorId) {
+                        state.lastCursorId = msgObj.id;
+                    }
+                    return msgObj;
+                })
+                .filter(msgObj => _filterMessage(msgObj, state))
+                .sort((msgObjA, msgObjB) => msgObjA.time - msgObjB.time); // sort by time
+            useMessages.forEach(msgObj => {
+                if (state.messagesCallback) {
+                    state.eMIs.add(msgObj.id);
+                    state.messagesCallback(msgObj.data);
+                }
+            });
+
+            return Promise.resolve();
+        });
+}
+
+export function close(channelState) {
+    channelState.closed = true;
+    channelState.db.close();
+}
+
+export function postMessage(channelState, messageJson) {
+
+    channelState.writeBlockPromise = channelState.writeBlockPromise
+        .then(() => writeMessage(
+            channelState.db,
+            channelState.uuid,
+            messageJson
+        ))
+        .then(() => {
+            if (randomInt(0, 10) === 0) {
+                /* await (do not await) */
+                cleanOldMessages(
+                    channelState.db,
+                    channelState.options.idb.ttl
+                );
+            }
+        });
+
+    return channelState.writeBlockPromise;
+}
+
+export function onMessage(channelState, fn, time) {
+    channelState.messagesCallbackTime = time;
+    channelState.messagesCallback = fn;
+    readNewMessages(channelState);
+}
+
+export function canBeUsed() {
+    if (isNode) return false;
+    const idb = getIdb();
+
+    if (!idb) return false;
+    return true;
+}
+
+export function averageResponseTime(options) {
+    return options.idb.fallbackInterval * 2;
+}
+
+export default {
+    create,
+    close,
+    onMessage,
+    postMessage,
+    canBeUsed,
+    type,
+    averageResponseTime,
+    microSeconds
+};

server/node_modules/broadcast-channel/src/methods/localstorage.js

@@ -0,0 +1,185 @@
+/**
+ * A localStorage-only method which uses localstorage and its 'storage'-event
+ * This does not work inside of webworkers because they have no access to locastorage
+ * This is basically implemented to support IE9 or your grandmothers toaster.
+ * @link https://caniuse.com/#feat=namevalue-storage
+ * @link https://caniuse.com/#feat=indexeddb
+ */
+
+import { ObliviousSet } from 'oblivious-set';
+
+import {
+    fillOptionsWithDefaults
+} from '../options';
+
+import {
+    sleep,
+    randomToken,
+    microSeconds as micro,
+    isNode
+} from '../util';
+
+export const microSeconds = micro;
+
+const KEY_PREFIX = 'pubkey.broadcastChannel-';
+export const type = 'localstorage';
+
+/**
+ * copied from crosstab
+ * @link https://github.com/tejacques/crosstab/blob/master/src/crosstab.js#L32
+ */
+export function getLocalStorage() {
+    let localStorage;
+    if (typeof window === 'undefined') return null;
+    try {
+        localStorage = window.localStorage;
+        localStorage = window['ie8-eventlistener/storage'] || window.localStorage;
+    } catch (e) {
+        // New versions of Firefox throw a Security exception
+        // if cookies are disabled. See
+        // https://bugzilla.mozilla.org/show_bug.cgi?id=1028153
+    }
+    return localStorage;
+}
+
+export function storageKey(channelName) {
+    return KEY_PREFIX + channelName;
+}
+
+
+/**
+* writes the new message to the storage
+* and fires the storage-event so other readers can find it
+*/
+export function postMessage(channelState, messageJson) {
+    return new Promise(res => {
+        sleep().then(() => {
+            const key = storageKey(channelState.channelName);
+            const writeObj = {
+                token: randomToken(),
+                time: new Date().getTime(),
+                data: messageJson,
+                uuid: channelState.uuid
+            };
+            const value = JSON.stringify(writeObj);
+            getLocalStorage().setItem(key, value);
+
+            /**
+             * StorageEvent does not fire the 'storage' event
+             * in the window that changes the state of the local storage.
+             * So we fire it manually
+             */
+            const ev = document.createEvent('Event');
+            ev.initEvent('storage', true, true);
+            ev.key = key;
+            ev.newValue = value;
+            window.dispatchEvent(ev);
+
+            res();
+        });
+    });
+}
+
+export function addStorageEventListener(channelName, fn) {
+    const key = storageKey(channelName);
+    const listener = ev => {
+        if (ev.key === key) {
+            fn(JSON.parse(ev.newValue));
+        }
+    };
+    window.addEventListener('storage', listener);
+    return listener;
+}
+export function removeStorageEventListener(listener) {
+    window.removeEventListener('storage', listener);
+}
+
+export function create(channelName, options) {
+    options = fillOptionsWithDefaults(options);
+    if (!canBeUsed()) {
+        throw new Error('BroadcastChannel: localstorage cannot be used');
+    }
+
+    const uuid = randomToken();
+
+    /**
+     * eMIs
+     * contains all messages that have been emitted before
+     * @type {ObliviousSet}
+     */
+    const eMIs = new ObliviousSet(options.localstorage.removeTimeout);
+
+    const state = {
+        channelName,
+        uuid,
+        eMIs // emittedMessagesIds
+    };
+
+
+    state.listener = addStorageEventListener(
+        channelName,
+        (msgObj) => {
+            if (!state.messagesCallback) return; // no listener
+            if (msgObj.uuid === uuid) return; // own message
+            if (!msgObj.token || eMIs.has(msgObj.token)) return; // already emitted
+            if (msgObj.data.time && msgObj.data.time < state.messagesCallbackTime) return; // too old
+
+            eMIs.add(msgObj.token);
+            state.messagesCallback(msgObj.data);
+        }
+    );
+
+
+    return state;
+}
+
+export function close(channelState) {
+    removeStorageEventListener(channelState.listener);
+}
+
+export function onMessage(channelState, fn, time) {
+    channelState.messagesCallbackTime = time;
+    channelState.messagesCallback = fn;
+}
+
+export function canBeUsed() {
+    if (isNode) return false;
+    const ls = getLocalStorage();
+
+    if (!ls) return false;
+
+    try {
+        const key = '__broadcastchannel_check';
+        ls.setItem(key, 'works');
+        ls.removeItem(key);
+    } catch (e) {
+        // Safari 10 in private mode will not allow write access to local
+        // storage and fail with a QuotaExceededError. See
+        // https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API#Private_Browsing_Incognito_modes
+        return false;
+    }
+
+    return true;
+}
+
+
+export function averageResponseTime() {
+    const defaultTime = 120;
+    const userAgent = navigator.userAgent.toLowerCase();
+    if (userAgent.includes('safari') && !userAgent.includes('chrome')) {
+        // safari is much slower so this time is higher
+        return defaultTime * 2;
+    }
+    return defaultTime;
+}
+
+export default {
+    create,
+    close,
+    onMessage,
+    postMessage,
+    canBeUsed,
+    type,
+    averageResponseTime,
+    microSeconds
+};

server/node_modules/broadcast-channel/src/methods/native.js

@@ -0,0 +1,76 @@
+import {
+    microSeconds as micro,
+    isNode
+} from '../util';
+
+export const microSeconds = micro;
+
+export const type = 'native';
+
+export function create(channelName) {
+    const state = {
+        messagesCallback: null,
+        bc: new BroadcastChannel(channelName),
+        subFns: [] // subscriberFunctions
+    };
+
+    state.bc.onmessage = msg => {
+        if (state.messagesCallback) {
+            state.messagesCallback(msg.data);
+        }
+    };
+
+    return state;
+}
+
+export function close(channelState) {
+    channelState.bc.close();
+    channelState.subFns = [];
+}
+
+export function postMessage(channelState, messageJson) {
+    try {
+        channelState.bc.postMessage(messageJson, false);
+        return Promise.resolve();
+    } catch (err) {
+        return Promise.reject(err);
+    }
+}
+
+export function onMessage(channelState, fn) {
+    channelState.messagesCallback = fn;
+}
+
+export function canBeUsed() {
+
+    /**
+     * in the electron-renderer, isNode will be true even if we are in browser-context
+     * so we also check if window is undefined
+     */
+    if (isNode && typeof window === 'undefined') return false;
+
+    if (typeof BroadcastChannel === 'function') {
+        if (BroadcastChannel._pubkey) {
+            throw new Error(
+                'BroadcastChannel: Do not overwrite window.BroadcastChannel with this module, this is not a polyfill'
+            );
+        }
+        return true;
+    } else return false;
+}
+
+
+export function averageResponseTime() {
+    return 150;
+}
+
+export default {
+    create,
+    close,
+    onMessage,
+    postMessage,
+    canBeUsed,
+    type,
+    averageResponseTime,
+    microSeconds
+};

server/node_modules/broadcast-channel/src/methods/node.js

@@ -0,0 +1,694 @@
+/**
+ * this method is used in nodejs-environments.
+ * The ipc is handled via sockets and file-writes to the tmp-folder
+ */
+
+const util = require('util');
+const fs = require('fs');
+const os = require('os');
+const events = require('events');
+const net = require('net');
+const path = require('path');
+const micro = require('nano-time');
+const rimraf = require('rimraf');
+const sha3_224 = require('js-sha3').sha3_224;
+const isNode = require('detect-node');
+const unload = require('unload');
+
+const fillOptionsWithDefaults = require('../../dist/lib/options.js').fillOptionsWithDefaults;
+const ownUtil = require('../../dist/lib/util.js');
+const randomInt = ownUtil.randomInt;
+const randomToken = ownUtil.randomToken;
+const { ObliviousSet } = require('oblivious-set');
+
+/**
+ * windows sucks, so we have handle windows-type of socket-paths
+ * @link https://gist.github.com/domenic/2790533#gistcomment-331356
+ */
+function cleanPipeName(str) {
+    if (
+        process.platform === 'win32' &&
+        !str.startsWith('\\\\.\\pipe\\')
+    ) {
+        str = str.replace(/^\//, '');
+        str = str.replace(/\//g, '-');
+        return '\\\\.\\pipe\\' + str;
+    } else {
+        return str;
+    }
+}
+
+const mkdir = util.promisify(fs.mkdir);
+const writeFile = util.promisify(fs.writeFile);
+const readFile = util.promisify(fs.readFile);
+const unlink = util.promisify(fs.unlink);
+const readdir = util.promisify(fs.readdir);
+const chmod = util.promisify(fs.chmod);
+const removeDir = util.promisify(rimraf);
+
+const OTHER_INSTANCES = {};
+const TMP_FOLDER_NAME = 'pubkey.bc';
+const TMP_FOLDER_BASE = path.join(
+    os.tmpdir(),
+    TMP_FOLDER_NAME
+);
+const getPathsCache = new Map();
+
+function getPaths(channelName) {
+    if (!getPathsCache.has(channelName)) {
+        const channelHash = sha3_224(channelName); // use hash incase of strange characters
+        /**
+         * because the lenght of socket-paths is limited, we use only the first 20 chars
+         * and also start with A to ensure we do not start with a number
+         * @link https://serverfault.com/questions/641347/check-if-a-path-exceeds-maximum-for-unix-domain-socket
+         */
+        const channelFolder = 'A' + channelHash.substring(0, 20);
+
+        const channelPathBase = path.join(
+            TMP_FOLDER_BASE,
+            channelFolder
+        );
+        const folderPathReaders = path.join(
+            channelPathBase,
+            'rdrs'
+        );
+        const folderPathMessages = path.join(
+            channelPathBase,
+            'messages'
+        );
+
+        const ret = {
+            channelBase: channelPathBase,
+            readers: folderPathReaders,
+            messages: folderPathMessages
+        };
+        getPathsCache.set(channelName, ret);
+        return ret;
+    }
+    return getPathsCache.get(channelName);
+}
+
+let ENSURE_BASE_FOLDER_EXISTS_PROMISE = null;
+async function ensureBaseFolderExists() {
+    if (!ENSURE_BASE_FOLDER_EXISTS_PROMISE) {
+        ENSURE_BASE_FOLDER_EXISTS_PROMISE = mkdir(TMP_FOLDER_BASE).catch(() => null);
+    }
+    return ENSURE_BASE_FOLDER_EXISTS_PROMISE;
+}
+
+async function ensureFoldersExist(channelName, paths) {
+    paths = paths || getPaths(channelName);
+
+    await ensureBaseFolderExists();
+
+    await mkdir(paths.channelBase).catch(() => null);
+    await Promise.all([
+        mkdir(paths.readers).catch(() => null),
+        mkdir(paths.messages).catch(() => null)
+    ]);
+
+    // set permissions so other users can use the same channel
+    const chmodValue = '777';
+    await Promise.all([
+        chmod(paths.channelBase, chmodValue),
+        chmod(paths.readers, chmodValue),
+        chmod(paths.messages, chmodValue)
+    ]).catch(() => null);
+}
+
+/**
+ * removes the tmp-folder
+ * @return {Promise<true>}
+ */
+async function clearNodeFolder() {
+    if (!TMP_FOLDER_BASE || TMP_FOLDER_BASE === '' || TMP_FOLDER_BASE === '/') {
+        throw new Error('BroadcastChannel.clearNodeFolder(): path is wrong');
+    }
+    ENSURE_BASE_FOLDER_EXISTS_PROMISE = null;
+    await removeDir(TMP_FOLDER_BASE);
+    ENSURE_BASE_FOLDER_EXISTS_PROMISE = null;
+    return true;
+}
+
+
+function socketPath(channelName, readerUuid, paths) {
+    paths = paths || getPaths(channelName);
+    const socketPath = path.join(
+        paths.readers,
+        readerUuid + '.s'
+    );
+    return cleanPipeName(socketPath);
+}
+
+function socketInfoPath(channelName, readerUuid, paths) {
+    paths = paths || getPaths(channelName);
+    const socketPath = path.join(
+        paths.readers,
+        readerUuid + '.json'
+    );
+    return socketPath;
+}
+
+
+/**
+ * Because it is not possible to get all socket-files in a folder,
+ * when used under fucking windows,
+ * we have to set a normal file so other readers know our socket exists
+ */
+function createSocketInfoFile(channelName, readerUuid, paths) {
+    const pathToFile = socketInfoPath(channelName, readerUuid, paths);
+    return writeFile(
+        pathToFile,
+        JSON.stringify({
+            time: microSeconds()
+        })
+    ).then(() => pathToFile);
+}
+
+/**
+ * returns the amount of channel-folders in the tmp-directory
+ * @return {Promise<number>}
+ */
+async function countChannelFolders() {
+    await ensureBaseFolderExists();
+    const folders = await readdir(TMP_FOLDER_BASE);
+    return folders.length;
+}
+
+
+async function connectionError(originalError) {
+    const count = await countChannelFolders();
+
+    // we only show the augmented message if there are more then 30 channels
+    // because we then assume that BroadcastChannel is used in unit-tests
+    if (count < 30) return originalError;
+
+    const addObj = {};
+    Object.entries(originalError).forEach(([k, v]) => addObj[k] = v);
+    const text = 'BroadcastChannel.create(): error: ' +
+        'This might happen if you have created to many channels, ' +
+        'like when you use BroadcastChannel in unit-tests.' +
+        'Try using BroadcastChannel.clearNodeFolder() to clear the tmp-folder before each test.' +
+        'See https://github.com/pubkey/broadcast-channel#clear-tmp-folder';
+    const newError = new Error(text + ': ' + JSON.stringify(addObj, null, 2));
+    return newError;
+}
+
+/**
+ * creates the socket-file and subscribes to it
+ * @return {{emitter: EventEmitter, server: any}}
+ */
+async function createSocketEventEmitter(channelName, readerUuid, paths) {
+    const pathToSocket = socketPath(channelName, readerUuid, paths);
+
+    const emitter = new events.EventEmitter();
+    const server = net
+        .createServer(stream => {
+            stream.on('end', function () { });
+            stream.on('data', function (msg) {
+                emitter.emit('data', msg.toString());
+            });
+        });
+
+    await new Promise((resolve, reject) => {
+        server.on('error', async (err) => {
+            const useErr = await connectionError(err);
+            reject(useErr);
+        });
+
+        server.listen(pathToSocket, async (err, res) => {
+            if (err) {
+                const useErr = await connectionError(err);
+                reject(useErr);
+            } else resolve(res);
+        });
+    });
+
+    return {
+        path: pathToSocket,
+        emitter,
+        server
+    };
+}
+
+async function openClientConnection(channelName, readerUuid) {
+    const pathToSocket = socketPath(channelName, readerUuid);
+    const client = new net.Socket();
+    return new Promise((res, rej) => {
+        client.connect(
+            pathToSocket,
+            () => res(client)
+        );
+        client.on('error', err => rej(err));
+    });
+}
+
+
+/**
+ * writes the new message to the file-system
+ * so other readers can find it
+ * @return {Promise}
+ */
+function writeMessage(channelName, readerUuid, messageJson, paths) {
+    paths = paths || getPaths(channelName);
+    const time = microSeconds();
+    const writeObject = {
+        uuid: readerUuid,
+        time,
+        data: messageJson
+    };
+
+    const token = randomToken();
+    const fileName = time + '_' + readerUuid + '_' + token + '.json';
+
+    const msgPath = path.join(
+        paths.messages,
+        fileName
+    );
+
+    return writeFile(
+        msgPath,
+        JSON.stringify(writeObject)
+    ).then(() => {
+        return {
+            time,
+            uuid: readerUuid,
+            token,
+            path: msgPath
+        };
+    });
+}
+
+/**
+ * returns the uuids of all readers
+ * @return {string[]}
+ */
+async function getReadersUuids(channelName, paths) {
+    paths = paths || getPaths(channelName);
+    const readersPath = paths.readers;
+    const files = await readdir(readersPath);
+
+    return files
+        .map(file => file.split('.'))
+        .filter(split => split[1] === 'json') // do not scan .socket-files
+        .map(split => split[0]);
+}
+
+async function messagePath(channelName, time, token, writerUuid) {
+    const fileName = time + '_' + writerUuid + '_' + token + '.json';
+
+    const msgPath = path.join(
+        getPaths(channelName).messages,
+        fileName
+    );
+    return msgPath;
+}
+
+async function getAllMessages(channelName, paths) {
+    paths = paths || getPaths(channelName);
+    const messagesPath = paths.messages;
+    const files = await readdir(messagesPath);
+    return files.map(file => {
+        const fileName = file.split('.')[0];
+        const split = fileName.split('_');
+
+        return {
+            path: path.join(
+                messagesPath,
+                file
+            ),
+            time: parseInt(split[0]),
+            senderUuid: split[1],
+            token: split[2]
+        };
+    });
+}
+
+function getSingleMessage(channelName, msgObj, paths) {
+    paths = paths || getPaths(channelName);
+
+    return {
+        path: path.join(
+            paths.messages,
+            msgObj.t + '_' + msgObj.u + '_' + msgObj.to + '.json'
+        ),
+        time: msgObj.t,
+        senderUuid: msgObj.u,
+        token: msgObj.to
+    };
+}
+
+
+function readMessage(messageObj) {
+    return readFile(messageObj.path, 'utf8')
+        .then(content => JSON.parse(content));
+}
+
+async function cleanOldMessages(messageObjects, ttl) {
+    const olderThen = Date.now() - ttl;
+    await Promise.all(
+        messageObjects
+            .filter(obj => (obj.time / 1000) < olderThen)
+            .map(obj => unlink(obj.path).catch(() => null))
+    );
+}
+
+
+
+const type = 'node';
+
+/**
+ * creates a new channelState
+ * @return {Promise<any>}
+ */
+async function create(channelName, options = {}) {
+    options = fillOptionsWithDefaults(options);
+    const time = microSeconds();
+    const paths = getPaths(channelName);
+    const ensureFolderExistsPromise = ensureFoldersExist(channelName, paths);
+    const uuid = randomToken();
+
+    const state = {
+        time,
+        channelName,
+        options,
+        uuid,
+        paths,
+        // contains all messages that have been emitted before
+        emittedMessagesIds: new ObliviousSet(options.node.ttl * 2),
+        messagesCallbackTime: null,
+        messagesCallback: null,
+        // ensures we do not read messages in parrallel
+        writeBlockPromise: Promise.resolve(),
+        otherReaderClients: {},
+        // ensure if process crashes, everything is cleaned up
+        removeUnload: unload.add(() => close(state)),
+        closed: false
+    };
+
+    if (!OTHER_INSTANCES[channelName]) OTHER_INSTANCES[channelName] = [];
+    OTHER_INSTANCES[channelName].push(state);
+
+    await ensureFolderExistsPromise;
+    const [
+        socketEE,
+        infoFilePath
+    ] = await Promise.all([
+        createSocketEventEmitter(channelName, uuid, paths),
+        createSocketInfoFile(channelName, uuid, paths),
+        refreshReaderClients(state)
+    ]);
+    state.socketEE = socketEE;
+    state.infoFilePath = infoFilePath;
+
+    // when new message comes in, we read it and emit it
+    socketEE.emitter.on('data', data => {
+
+        // if the socket is used fast, it may appear that multiple messages are flushed at once
+        // so we have to split them before
+        const singleOnes = data.split('|');
+        singleOnes
+            .filter(single => single !== '')
+            .forEach(single => {
+                try {
+                    const obj = JSON.parse(single);
+                    handleMessagePing(state, obj);
+                } catch (err) {
+                    throw new Error('could not parse data: ' + single);
+                }
+            });
+    });
+
+    return state;
+}
+
+function _filterMessage(msgObj, state) {
+    if (msgObj.senderUuid === state.uuid) return false; // not send by own
+    if (state.emittedMessagesIds.has(msgObj.token)) return false; // not already emitted
+    if (!state.messagesCallback) return false; // no listener
+    if (msgObj.time < state.messagesCallbackTime) return false; // not older then onMessageCallback
+    if (msgObj.time < state.time) return false; // msgObj is older then channel
+
+    state.emittedMessagesIds.add(msgObj.token);
+    return true;
+}
+
+/**
+ * when the socket pings, so that we now new messages came,
+ * run this
+ */
+async function handleMessagePing(state, msgObj) {
+
+    /**
+     * when there are no listener, we do nothing
+     */
+    if (!state.messagesCallback) return;
+
+    let messages;
+    if (!msgObj) {
+        // get all
+        messages = await getAllMessages(state.channelName, state.paths);
+    } else {
+        // get single message
+        messages = [
+            getSingleMessage(state.channelName, msgObj, state.paths)
+        ];
+    }
+
+    const useMessages = messages
+        .filter(msgObj => _filterMessage(msgObj, state))
+        .sort((msgObjA, msgObjB) => msgObjA.time - msgObjB.time); // sort by time
+
+
+    // if no listener or message, so not do anything
+    if (!useMessages.length || !state.messagesCallback) return;
+
+    // read contents
+    await Promise.all(
+        useMessages
+            .map(
+                msgObj => readMessage(msgObj).then(content => msgObj.content = content)
+            )
+    );
+
+    useMessages.forEach(msgObj => {
+        state.emittedMessagesIds.add(msgObj.token);
+
+        if (state.messagesCallback) {
+            // emit to subscribers
+            state.messagesCallback(msgObj.content.data);
+        }
+    });
+}
+
+/**
+ * ensures that the channelState is connected with all other readers
+ * @return {Promise<void>}
+ */
+function refreshReaderClients(channelState) {
+    return getReadersUuids(channelState.channelName, channelState.paths)
+        .then(otherReaders => {
+            // remove subscriptions to closed readers
+            Object.keys(channelState.otherReaderClients)
+                .filter(readerUuid => !otherReaders.includes(readerUuid))
+                .forEach(async (readerUuid) => {
+                    try {
+                        await channelState.otherReaderClients[readerUuid].destroy();
+                    } catch (err) { }
+                    delete channelState.otherReaderClients[readerUuid];
+                });
+
+            // add new readers
+            return Promise.all(
+                otherReaders
+                    .filter(readerUuid => readerUuid !== channelState.uuid) // not own
+                    .filter(readerUuid => !channelState.otherReaderClients[readerUuid]) // not already has client
+                    .map(async (readerUuid) => {
+                        try {
+                            if (channelState.closed) return;
+                            try {
+                                const client = await openClientConnection(channelState.channelName, readerUuid);
+                                channelState.otherReaderClients[readerUuid] = client;
+                            } catch (err) {
+                                // this can throw when the cleanup of another channel was interrupted
+                                // or the socket-file does not exits yet
+                            }
+                        } catch (err) {
+                            // this might throw if the other channel is closed at the same time when this one is running refresh
+                            // so we do not throw an error
+                        }
+                    })
+            );
+        });
+}
+
+/**
+ * post a message to the other readers
+ * @return {Promise<void>}
+ */
+function postMessage(channelState, messageJson) {
+    const writePromise = writeMessage(
+        channelState.channelName,
+        channelState.uuid,
+        messageJson,
+        channelState.paths
+    );
+    channelState.writeBlockPromise = channelState.writeBlockPromise.then(async () => {
+
+        // w8 one tick to let the buffer flush
+        await new Promise(res => setTimeout(res, 0));
+
+        const [msgObj] = await Promise.all([
+            writePromise,
+            refreshReaderClients(channelState)
+        ]);
+        emitOverFastPath(channelState, msgObj, messageJson);
+        const pingStr = '{"t":' + msgObj.time + ',"u":"' + msgObj.uuid + '","to":"' + msgObj.token + '"}|';
+
+        const writeToReadersPromise = Promise.all(
+            Object.values(channelState.otherReaderClients)
+                .filter(client => client.writable) // client might have closed in between
+                .map(client => {
+                    return new Promise(res => {
+                        client.write(pingStr, res);
+                    });
+                })
+        );
+
+        /**
+         * clean up old messages
+         * to not waste resources on cleaning up,
+         * only if random-int matches, we clean up old messages
+         */
+        if (randomInt(0, 20) === 0) {
+            /* await */
+            getAllMessages(channelState.channelName, channelState.paths)
+                .then(allMessages => cleanOldMessages(allMessages, channelState.options.node.ttl));
+        }
+
+        return writeToReadersPromise;
+    });
+
+    return channelState.writeBlockPromise;
+}
+
+/**
+ * When multiple BroadcastChannels with the same name
+ * are created in a single node-process, we can access them directly and emit messages.
+ * This might not happen often in production
+ * but will speed up things when this module is used in unit-tests.
+ */
+function emitOverFastPath(state, msgObj, messageJson) {
+    if (!state.options.node.useFastPath) return; // disabled
+    const others = OTHER_INSTANCES[state.channelName].filter(s => s !== state);
+
+    const checkObj = {
+        time: msgObj.time,
+        senderUuid: msgObj.uuid,
+        token: msgObj.token
+    };
+
+    others
+        .filter(otherState => _filterMessage(checkObj, otherState))
+        .forEach(otherState => {
+            otherState.messagesCallback(messageJson);
+        });
+}
+
+
+function onMessage(channelState, fn, time = microSeconds()) {
+    channelState.messagesCallbackTime = time;
+    channelState.messagesCallback = fn;
+    handleMessagePing(channelState);
+}
+
+/**
+ * closes the channel
+ * @return {Promise}
+ */
+function close(channelState) {
+    if (channelState.closed) return;
+    channelState.closed = true;
+    channelState.emittedMessagesIds.clear();
+    OTHER_INSTANCES[channelState.channelName] = OTHER_INSTANCES[channelState.channelName].filter(o => o !== channelState);
+
+    if (channelState.removeUnload) {
+        channelState.removeUnload.remove();
+    }
+
+    return new Promise((res) => {
+
+        if (channelState.socketEE)
+            channelState.socketEE.emitter.removeAllListeners();
+
+        Object.values(channelState.otherReaderClients)
+            .forEach(client => client.destroy());
+
+        if (channelState.infoFilePath) {
+            try {
+                fs.unlinkSync(channelState.infoFilePath);
+            } catch (err) { }
+        }
+
+        /**
+         * the server get closed lazy because others might still write on it
+         * and have not found out that the infoFile was deleted
+         */
+        setTimeout(() => {
+            channelState.socketEE.server.close();
+            res();
+        }, 200);
+    });
+}
+
+
+function canBeUsed() {
+    return isNode;
+}
+
+/**
+ * on node we use a relatively height averageResponseTime,
+ * because the file-io might be in use.
+ * Also it is more important that the leader-election is reliable,
+ * then to have a fast election.
+ */
+function averageResponseTime() {
+    return 200;
+}
+
+function microSeconds() {
+    return parseInt(micro.microseconds());
+}
+
+module.exports = {
+    TMP_FOLDER_BASE,
+    cleanPipeName,
+    getPaths,
+    ensureFoldersExist,
+    clearNodeFolder,
+    socketPath,
+    socketInfoPath,
+    createSocketInfoFile,
+    countChannelFolders,
+    createSocketEventEmitter,
+    openClientConnection,
+    writeMessage,
+    getReadersUuids,
+    messagePath,
+    getAllMessages,
+    getSingleMessage,
+    readMessage,
+    cleanOldMessages,
+    type,
+    create,
+    _filterMessage,
+    handleMessagePing,
+    refreshReaderClients,
+    postMessage,
+    emitOverFastPath,
+    onMessage,
+    close,
+    canBeUsed,
+    averageResponseTime,
+    microSeconds
+};

server/node_modules/broadcast-channel/src/methods/simulate.js

@@ -0,0 +1,59 @@
+import {
+    microSeconds as micro,
+} from '../util';
+
+export const microSeconds = micro;
+
+export const type = 'simulate';
+
+const SIMULATE_CHANNELS = new Set();
+
+export function create(channelName) {
+    const state = {
+        name: channelName,
+        messagesCallback: null
+    };
+    SIMULATE_CHANNELS.add(state);
+
+    return state;
+}
+
+export function close(channelState) {
+    SIMULATE_CHANNELS.delete(channelState);
+}
+
+export function postMessage(channelState, messageJson) {
+    return new Promise(res => setTimeout(() => {
+        const channelArray = Array.from(SIMULATE_CHANNELS);
+        channelArray
+            .filter(channel => channel.name === channelState.name)
+            .filter(channel => channel !== channelState)
+            .filter(channel => !!channel.messagesCallback)
+            .forEach(channel => channel.messagesCallback(messageJson));
+        res();
+    }, 5));
+}
+
+export function onMessage(channelState, fn) {
+    channelState.messagesCallback = fn;
+}
+
+export function canBeUsed() {
+    return true;
+}
+
+
+export function averageResponseTime() {
+    return 5;
+}
+
+export default {
+    create,
+    close,
+    onMessage,
+    postMessage,
+    canBeUsed,
+    type,
+    averageResponseTime,
+    microSeconds
+};

server/node_modules/broadcast-channel/src/options.js

@@ -0,0 +1,30 @@
+export function fillOptionsWithDefaults(originalOptions = {}) {
+    const options = JSON.parse(JSON.stringify(originalOptions));
+
+    // main
+    if (typeof options.webWorkerSupport === 'undefined') options.webWorkerSupport = true;
+
+
+    // indexed-db
+    if (!options.idb) options.idb = {};
+    //  after this time the messages get deleted
+    if (!options.idb.ttl) options.idb.ttl = 1000 * 45;
+    if (!options.idb.fallbackInterval) options.idb.fallbackInterval = 150;
+    //  handles abrupt db onclose events.
+    if (originalOptions.idb && typeof originalOptions.idb.onclose === 'function')
+        options.idb.onclose = originalOptions.idb.onclose;
+
+    // localstorage
+    if (!options.localstorage) options.localstorage = {};
+    if (!options.localstorage.removeTimeout) options.localstorage.removeTimeout = 1000 * 60;
+
+    // custom methods
+    if (originalOptions.methods) options.methods = originalOptions.methods;
+
+    // node
+    if (!options.node) options.node = {};
+    if (!options.node.ttl) options.node.ttl = 1000 * 60 * 2; // 2 minutes;
+    if (typeof options.node.useFastPath === 'undefined') options.node.useFastPath = true;
+
+    return options;
+}

server/node_modules/broadcast-channel/src/util.js

@@ -0,0 +1,57 @@
+/**
+ * returns true if the given object is a promise
+ */
+export function isPromise(obj) {
+    if (obj &&
+        typeof obj.then === 'function') {
+        return true;
+    } else {
+        return false;
+    }
+}
+
+export function sleep(time) {
+    if (!time) time = 0;
+    return new Promise(res => setTimeout(res, time));
+}
+
+export function randomInt(min, max) {
+    return Math.floor(Math.random() * (max - min + 1) + min);
+}
+
+/**
+ * https://stackoverflow.com/a/8084248
+ */
+export function randomToken() {
+    return Math.random().toString(36).substring(2);
+}
+
+
+let lastMs = 0;
+let additional = 0;
+
+/**
+ * returns the current time in micro-seconds,
+ * WARNING: This is a pseudo-function
+ * Performance.now is not reliable in webworkers, so we just make sure to never return the same time.
+ * This is enough in browsers, and this function will not be used in nodejs.
+ * The main reason for this hack is to ensure that BroadcastChannel behaves equal to production when it is used in fast-running unit tests.
+ */
+export function microSeconds() {
+    const ms = new Date().getTime();
+    if (ms === lastMs) {
+        additional++;
+        return ms * 1000 + additional;
+    } else {
+        lastMs = ms;
+        additional = 0;
+        return ms * 1000;
+    }
+}
+
+/**
+ * copied from the 'detect-node' npm module
+ * We cannot use the module directly because it causes problems with rollup
+ * @link https://github.com/iliakan/detect-node/blob/master/index.js
+ */
+export const isNode = Object.prototype.toString.call(typeof process !== 'undefined' ? process : 0) === '[object process]';

server/node_modules/broadcast-channel/types/broadcast-channel.d.ts

@@ -0,0 +1,65 @@
+declare type MethodType = 'node' | 'idb' | 'native' | 'localstorage' | 'simulate';
+
+
+
+interface BroadcastChannelEventMap {
+    "message": MessageEvent;
+    "messageerror": MessageEvent;
+}
+
+export interface BroadcastMethod<State = object> {
+    type: string;
+    microSeconds(): number;
+    create(channelName: string, options: BroadcastChannelOptions): Promise<State> | State;
+    close(channelState: State): void;
+    onMessage(channelState: State, callback: (args: any) => void): void;
+    postMessage(channelState: State, message: any): Promise<any>;
+    canBeUsed(): boolean;
+    averageResponseTime(): number;
+}
+
+export type BroadcastChannelOptions = {
+    type?: MethodType,
+    methods?: BroadcastMethod[] | BroadcastMethod,
+    webWorkerSupport?: boolean;
+    prepareDelay?: number;
+    node?: {
+        ttl?: number;
+        useFastPath?: boolean;
+    };
+    idb?: {
+        ttl?: number;
+        fallbackInterval?: number;
+        onclose?: () => void;
+    };
+};
+
+declare type EventContext = 'message' | 'internal' | 'leader';
+
+declare type OnMessageHandler<T> = ((this: BroadcastChannel, ev: T) => any) | null;
+
+/**
+ * api as defined in
+ * @link https://html.spec.whatwg.org/multipage/web-messaging.html#broadcasting-to-other-browsing-contexts
+ * @link https://github.com/Microsoft/TypeScript/blob/master/src/lib/webworker.generated.d.ts#L325
+ */
+export class BroadcastChannel<T = any> {
+    constructor(name: string, opts?: BroadcastChannelOptions);
+    readonly name: string;
+    readonly options: BroadcastChannelOptions;
+    readonly type: MethodType;
+    readonly isClosed: boolean;
+
+    postMessage(msg: T): Promise<void>;
+    close(): Promise<void>;
+
+    onmessage: OnMessageHandler<T>;
+
+    // not defined in the offical standard
+    addEventListener(type: EventContext, handler: OnMessageHandler<T>): void;
+    removeEventListener(type: EventContext, handler: OnMessageHandler<T>): void;
+
+}
+// statics
+export function clearNodeFolder(opts?: BroadcastChannelOptions): Promise<boolean>;
+export function enforceOptions(opts?: BroadcastChannelOptions | false | null): void;

server/node_modules/broadcast-channel/types/index.d.ts

@@ -0,0 +1,2 @@
+export * from './broadcast-channel';
+export * from './leader-election';

server/node_modules/broadcast-channel/types/leader-election.d.ts

@@ -0,0 +1,44 @@
+import {
+    BroadcastChannel,
+    OnMessageHandler
+} from './broadcast-channel';
+
+export type LeaderElectionOptions = {
+    /**
+     * This value decides how often instances will renegotiate who is leader.
+     * Probably should be at least 2x bigger than responseTime.
+     */
+    fallbackInterval?: number;
+    /**
+     * This timer value is used when resolving which instance should be leader.
+     * In case when your application elects more than one leader increase this value.
+     */
+    responseTime?: number;
+};
+
+export declare class LeaderElector {
+
+    /**
+     * IMPORTANT: The leader election is lazy,
+     * it will not start before you call awaitLeadership()
+     * so isLeader will never become true then
+     */
+    readonly isLeader: boolean;
+
+    readonly isDead: boolean;
+    readonly token: string;
+
+    applyOnce(): Promise<boolean>;
+    awaitLeadership(): Promise<void>;
+    die(): Promise<void>;
+
+    /**
+     * Add an event handler that is run
+     * when it is detected that there are duplicate leaders
+     */
+    onduplicate: OnMessageHandler<any>;
+}
+
+type CreateFunction = (channel: BroadcastChannel, options?: LeaderElectionOptions) => LeaderElector;
+
+export const createLeaderElection: CreateFunction;