Caching results for channel autocomplete.

client/lib/collections.coffee

@@ -2,3 +2,4 @@
 @ChatRoom = new Meteor.Collection 'rocketchat_room'
 @ChatSubscription = new Meteor.Collection 'rocketchat_subscription'
 @UserAndRoom = new Meteor.Collection null
+@CachedChannelList = new Meteor.Collection null

client/startup/autocomplete.coffee

@@ -0,0 +1,13 @@
+Meteor.startup ->
+
+  Meteor.call 'getTotalChannels', (error, result) ->
+    if error
+      return Errors.throw error.reason
+
+    # @todo: create settings for limit?
+    if result <= 200
+      Meteor.call 'channelsList', (chError, channels) ->
+        if chError
+          return Errors.throw chError.reason
+
+        CachedChannelList.insert(channel) for channel in channels.channels

client/views/app/messagePopupConfig.coffee

@@ -2,6 +2,12 @@
 @filteredUsers = new Mongo.Collection 'filtered-users'
 @channelAutocomplete = new Mongo.Collection 'channel-autocomplete'
 
+channelAutoCompleteCollection = ->
+	if CachedChannelList.find().count() isnt 0
+		return CachedChannelList
+	else
+		return channelAutocomplete
+
 Template.messagePopupConfig.helpers
 	popupUserConfig: ->
 		self = this
@@ -50,15 +56,17 @@ Template.messagePopupConfig.helpers
 		template = Template.instance()
 		config =
 			title: 'Channels'
-			collection: channelAutocomplete
+			collection: channelAutoCompleteCollection()
 			trigger: '#'
 			template: 'messagePopupChannel'
 			getInput: self.getInput
 			getFilter: (collection, filter) ->
 				exp = new RegExp(filter, 'i')
 
-				Meteor.subscribe 'channelAutocomplete', filter
-				items = channelAutocomplete.find( { name: exp }, { limit: 10 }).fetch()
+				unless _.isEqual(collection, CachedChannelList)
+					Meteor.subscribe 'channelAutocomplete', filter
+
+				items = collection.find( { name: exp }, { limit: 10 }).fetch()
 
 				return items
 			getValue: (_id, collection) ->

server/methods/getTotalChannels.coffee

@@ -0,0 +1,7 @@
+Meteor.methods
+  getTotalChannels: ->
+    if not Meteor.userId()
+      throw new Meteor.Error 'invalid-user', '[methods] getTotalChannels -> Invalid user'
+
+    console.log '[methods] getTotalChannels -> '.green, 'userId:', Meteor.userId()
+    return RocketChat.models.Rooms.find({ t: 'c' }).count()

server/publications/channelAutocomplete.coffee

@@ -18,7 +18,7 @@ Meteor.publish 'channelAutocomplete', (name) ->
 
   pub = this
 
-  cursorHandle = ChatRoom.find(query, options).observeChanges
+  cursorHandle = RocketChat.models.Rooms.find(query, options).observeChanges
     added: (_id, record) ->
       pub.added('channel-autocomplete', _id, record)