class Xmpp.Models.Chat extends Xmpp.Models.Model
   namespace: 'app.chat'
 
   defaults:
     who: null
     withWhom: null
 
   initialize: ->
     _.bindAll(this)
 
 class Xmpp.Collections.ChatsCollection extends Backbone.Collection
   model: Xmpp.Models.Chat
   openedChats: []
 
   initialize: ->
     _.bindAll(this)
 
     @on("add", @newChat)
 
   newChat: (chat) ->
 #    App.debug ['adding chat to chatCollection', chat]
     @openedChats.push chat
 
   find: (who, withWhom) ->
 #    App.debug ['opened chats:', @openedChats]
 
     _.find(@openedChats, (chat) ->
       chat.get('who') == who && chat.get('withWhom') == withWhom
     )
 
   removeChat: (chat) ->
     @openedChats = _.without(@openedChats, chat)