set username as callable method from API

packages/rocketchat-lib/package.js

@@ -18,6 +18,16 @@ Package.onUse(function(api) {
 	api.addFiles('lib/underscore.string.coffee', ['server', 'client']);
 	api.addFiles('lib/core.coffee', ['server', 'client']);
 	api.addFiles('lib/callbacks.coffee', ['server', 'client']);
+	
+	api.addFiles([
+		'server/functions/checkUsernameAvailability.coffee',
+		'server/functions/setUsername.coffee'
+	], ['server']);
+	
+	api.addFiles([
+		'server/methods/setUsername.coffee'
+	], ['server']);
+
 	api.addFiles('server/sendMessage.coffee', ['server']);
 	api.addFiles('server/slashCommand.coffee', ['server']);
 	api.addFiles('client/slashCommand.coffee', ['client']);

packages/rocketchat-lib/server/functions/checkUsernameAvailability.coffee

+RocketChat.checkUsernameAvailability = (username) ->
+	return not Meteor.users.findOne({ username: { $regex : new RegExp("^" + _.trim(username) + "$", "i") } })
\ No newline at end of file

packages/rocketchat-lib/server/functions/setUsername.coffee

+RocketChat.setUsername = (user, username) ->
+	username = _.trim username
+	if not user or not username
+		return false
+
+	if not /^[0-9a-zA-Z-_.]+$/.test username
+		return false
+
+	# User already has desired username, return
+	if user.username is username
+		return user
+
+	# Check username availability 
+	unless RocketChat.checkUsernameAvailability username
+		return false
+
+	previousUsername = user.username
+
+	# Username is available, set username and update all references
+	ChatMessage.update { "u._id": user._id }, { $set: { "u.username": username } }, { multi: true }
+	
+	# @TODO: update chatmessage mentions
+	ChatMessage.find({ "mentions.username": previousUsername }).forEach (msg) ->
+		updatedMsg = msg.msg.replace(new RegExp("@#{previousUsername}", "ig"), "@#{username}")
+		ChatMessage.update { _id: msg._id, "mentions.username": previousUsername }, { $set: { "mentions.$.username": username, "msg": updatedMsg } }
+
+	ChatRoom.update { usernames: previousUsername }, { $set: { "usernames.$": username } }, { multi: true }
+	ChatRoom.update { "u._id": user._id }, { $set: { "u.username": username } }, { multi: true }
+
+	ChatSubscription.update { "u._id": user._id }, { $set: { "u.username": username } }, { multi: true }
+	ChatSubscription.update { name: previousUsername, t: "d" }, { $set: { name: username } }, { multi: true }
+
+	Meteor.users.update { _id: user._id }, { $set: { username: username } }
+	user.username = username
+	return user

packages/rocketchat-lib/server/methods/setUsername.coffee

+Meteor.methods
+	setUsername: (username) ->
+		if not Meteor.userId()
+			throw new Meteor.Error('invalid-user', "[methods] setUsername -> Invalid user")
+
+		console.log '[methods] setUsername -> '.green, 'userId:', Meteor.userId(), 'arguments:', arguments
+
+		user = Meteor.user()
+
+		if not /^[0-9a-zA-Z-_.]+$/.test username
+			throw new Meteor.Error 'username-invalid'
+
+		if not RocketChat.checkUsernameAvailability username
+			throw new Meteor.Error 'username-unavailable'
+
+		unless RocketChat.setUsername user, username
+			throw new Meteor.Error 'could-not-change-username', t('Could_not_change_username')
+
+		return username
\ No newline at end of file

server/methods/setUsername.coffee

-Meteor.methods
-	setUsername: (username) ->
-		if not Meteor.userId()
-			throw new Meteor.Error('invalid-user', "[methods] setUsername -> Invalid user")
-
-		console.log '[methods] setUsername -> '.green, 'userId:', Meteor.userId(), 'arguments:', arguments
-
-		user = Meteor.user()
-
-		if user.username?
-			throw new Meteor.Error 'username-already-setted'
-
-		if not usernameIsAvaliable username
-			throw new Meteor.Error 'username-unavaliable'
-
-		if not /^[0-9a-zA-Z-_.]+$/.test username
-			throw new Meteor.Error 'username-invalid'
-
-		if not user.username?
-			ChatRoom.find({default: true, t: {$in: ['c', 'p']}}).forEach (room) ->
-				# put user in default rooms
-				ChatRoom.update room._id,
-					$addToSet:
-						usernames: username
-
-				if not ChatSubscription.findOne(rid: room._id, 'u._id': user._id)?
-					ChatSubscription.insert
-						rid: room._id
-						name: room.name
-						ts: new Date()
-						t: room.t
-						f: false
-						open: true
-						alert: true
-						unread: 1
-						u:
-							_id: user._id
-							username: username
-
-					ChatMessage.insert
-						rid: room._id
-						ts: new Date()
-						t: 'uj'
-						msg: ''
-						u:
-							_id: user._id
-							username: username
-
-		Meteor.users.update({_id: user._id}, {$set: {username: username}})
-
-		return username
-
-slug = (text) ->
-	text = slugify text, '.'
-	return text.replace(/[^0-9a-z-_.]/g, '')
-
-usernameIsAvaliable = (username) ->
-	if username.length < 1
-		return false
-	return not Meteor.users.findOne({username: {$regex : new RegExp(username, "i") }})
+# Meteor.methods
+# 	setUsername: (username) ->
+# 		if not Meteor.userId()
+# 			throw new Meteor.Error('invalid-user', "[methods] setUsername -> Invalid user")
+
+# 		console.log '[methods] setUsername -> '.green, 'userId:', Meteor.userId(), 'arguments:', arguments
+
+# 		user = Meteor.user()
+
+# 		if not usernameIsAvaliable username
+# 			throw new Meteor.Error 'username-unavailable'
+
+# 		if not /^[0-9a-zA-Z-_.]+$/.test username
+# 			throw new Meteor.Error 'username-invalid'
+
+# 		if not user.username?
+# 			ChatRoom.find({default: true, t: {$in: ['c', 'p']}}).forEach (room) ->
+# 				# put user in default rooms
+# 				ChatRoom.update room._id,
+# 					$addToSet:
+# 						usernames: username
+
+# 				if not ChatSubscription.findOne(rid: room._id, 'u._id': user._id)?
+# 					ChatSubscription.insert
+# 						rid: room._id
+# 						name: room.name
+# 						ts: new Date()
+# 						t: room.t
+# 						f: false
+# 						open: true
+# 						alert: true
+# 						unread: 1
+# 						u:
+# 							_id: user._id
+# 							username: username
+
+# 					ChatMessage.insert
+# 						rid: room._id
+# 						ts: new Date()
+# 						t: 'uj'
+# 						msg: ''
+# 						u:
+# 							_id: user._id
+# 							username: username
+
+# 		Meteor.users.update({_id: user._id}, {$set: {username: username}})
+
+# 		return username
+
+# slug = (text) ->
+# 	text = slugify text, '.'
+# 	return text.replace(/[^0-9a-z-_.]/g, '')
+
+# usernameIsAvaliable = (username) ->
+# 	if username.length < 1
+# 		return false
+# 	return not Meteor.users.findOne({username: {$regex : new RegExp("^" + username + "$", "i") }})