command-manager: add ability to define aliases

lib/command-manager.js

@@ -18,17 +18,27 @@ Manager.prototype.add = function add(name, desc, args) {
   this._names.sort()
 }
 
+Manager.prototype.alias = function alias(name, orig) {
+  const obj = this.commands.get(orig)
+  if (!obj)
+    throw new Error('Cannot create alias. Original does not exist')
+
+  this.add(name, obj.description, obj.args)
+}
+
 Manager.prototype.addDefaults = function addDefaults() {
-  this.add('/action', 'Send action to target', '[channel|nickname] [msg]')
+  this.add('/action', 'Send action to target', '[target] [msg]')
   this.add('/away', 'Set away status', '[away msg]')
   this.add('/join', 'Join a channel', '([channel[,channel]], [key[,key]]) || 0')
   this.add('/kick', 'Kick user from channel', '<channel> <user>')
+  this.add('/leave', 'Leave a channel', '[channel] [msg]')
+  this.alias('/me', '/action')
   this.add('/mode', 'Set mode for target', '<nickname|channel> <mode>')
   this.add('/motd', 'Get the MOTD for the target', '[target]')
   this.add('/msg', 'Send message to target', '[nickname|channel] [msg]')
   this.add('/nick', 'Set/change your nickname', '<nickname>')
   this.add('/notice', 'Send notice to target', '[nickname|channel] [msg]')
-  this.add('/part', '(or /leave) Part from a channel', '[channel] [msg]')
+  this.alias('/part', '/leave')
   this.add('/quit', 'Terminate session', '[msg]')
   this.add('/topic', `Set/remove a channel's topic`, '[channel] [topic]')
 }