node_modules ignore

server/node_modules/stream-chain/utils/take.js

@@ -0,0 +1,39 @@
+'use strict';
+
+const {Transform} = require('stream');
+
+class Take extends Transform {
+  constructor(options) {
+    super(Object.assign({}, options, {writableObjectMode: true, readableObjectMode: true}));
+    this._n = this._skip = 0;
+    if (options) {
+      'n' in options && (this._n = options.n);
+      'skip' in options && (this._skip = options.skip);
+    }
+    if (this._skip <= 0) {
+      this._transform = this._n > 0 ? this._countValues : this._doNothing;
+    }
+  }
+  _transform(chunk, encoding, callback) {
+    if (--this._skip <= 0) {
+      this._transform = this._n > 0 ? this._countValues : this._doNothing;
+    }
+    callback(null);
+  }
+  _countValues(chunk, encoding, callback) {
+    if (--this._n <= 0) {
+      this._transform = this._doNothing;
+    }
+    this.push(chunk);
+    callback(null);
+  }
+  _doNothing(chunk, encoding, callback) {
+    callback(null);
+  }
+  static make(n) {
+    return new Take(typeof n == 'object' ? n : {n});
+  }
+}
+Take.make.Constructor = Take;
+
+module.exports = Take.make;