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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
 
  initialize: ->
    _.bindAll(this)
 
    Backbone.Events.on('closeChat', (tab, chat) =>
      @removeChat(chat)
    )
 
  find: (who, withWhom) ->
    _.find(@models, (chat) ->
      chat.get('who') == who && chat.get('withWhom') == withWhom
    )
 
  removeChat: (chat) ->
    @models = _.without(@openedChats, chat)