From 55afd5fb04f90b209edd3aa2ec386dcb13cd7ceb Mon Sep 17 00:00:00 2001
From: Daniel Scalzi <d_scalzi@yahoo.com>
Date: Mon, 29 Jul 2019 20:53:26 -0400
Subject: [PATCH] Add utility to parse maven identifiers.

---
 src/index.ts      | 14 +++++++++-----
 src/model/type.ts |  3 +++
 src/util/maven.ts | 39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 51 insertions(+), 5 deletions(-)
 create mode 100644 src/util/maven.ts

diff --git a/src/index.ts b/src/index.ts
index beac586..491745f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,6 +2,13 @@
 import { resolve } from 'path'
 import yargs from 'yargs'
 
+function positionalRoot(yargs: yargs.Argv) {
+    return yargs.positional('root', {
+        describe: 'File structure root',
+        type: 'string'
+    })
+}
+
 // Registering yargs configuration.
 // tslint:disable-next-line:no-unused-expression
 yargs
@@ -10,14 +17,11 @@ yargs
     root: resolve
 })
 .command({
-    command: 'generate <root>',
+    command: 'generate server <root>',
     aliases: ['g'],
     describe: 'Generate a distribution.json',
     builder: (yargs) => {
-        return yargs.positional('root', {
-            describe: 'File structure root',
-            type: 'string'
-        })
+        return positionalRoot(yargs)
     },
     handler: (argv) => {
         console.log(`got generate with root=${argv.root}`)
diff --git a/src/model/type.ts b/src/model/type.ts
index c009bf6..91bac11 100644
--- a/src/model/type.ts
+++ b/src/model/type.ts
@@ -4,6 +4,9 @@ export const Types: {[property: string]: Type} = {
         id: 'Library',
         defaultExtension: 'jar'
     },
+    /**
+     * @deprecated Will be replaced by Types.Forge.
+     */
     ForgeHosted: {
         id: 'ForgeHosted',
         defaultExtension: 'jar'
diff --git a/src/util/maven.ts b/src/util/maven.ts
new file mode 100644
index 0000000..c2444fc
--- /dev/null
+++ b/src/util/maven.ts
@@ -0,0 +1,39 @@
+import { normalize } from 'path'
+import { URL } from 'url'
+
+export class MavenUtil {
+
+    public static readonly ID_REGEX = /(.+):(.+):([^@]+)(?:@{1}(.+)$)?/
+
+    public static isMavenIdentifier(id: string) {
+        return this.ID_REGEX.test(id)
+    }
+
+    public static mavenToString(id: string, extension = 'jar') {
+        if (!this.isMavenIdentifier(id)) {
+            return null
+        }
+
+        const result = this.ID_REGEX.exec(id)
+        if (result != null) {
+            const group = result[1]
+            const artifact = result[2]
+            const version = result[3]
+            const ext = result[4] || extension
+
+            return `${group.replace(/\./g, '/')}/${artifact}/${version}/${artifact}-${version}.${ext}`
+        }
+        return null
+    }
+
+    public static mavenToUrl(id: string, extension = 'jar') {
+        const res = this.mavenToString(id, extension)
+        return res == null ? null : new URL(res)
+    }
+
+    public static mavenToPath(id: string, extension = 'jar') {
+        const res = this.mavenToString(id, extension)
+        return res == null ? null : normalize(res)
+    }
+
+}