bigbluebutton-Github/labs/meteor-client/server/collection_methods/chat.coffee

Meteor.methods
  addChatToCollection: (meetingId, messageObject) ->
    # manually convert time from 1.408645053653E12 to 1408645053653 if necessary (this is the time_from that the Flash client outputs)
    messageObject.from_time = (messageObject.from_time).toString().split('.').join("").split("E")[0]
    entry =
      meetingId: meetingId
      message:
        chat_type: messageObject.chat_type
        message: messageObject.message
        to_username: messageObject.to_username
        from_tz_offset: messageObject.from_tz_offset
        from_color: messageObject.from_color
        to_userid: messageObject.to_userid
        from_userid: messageObject.from_userid
        from_time: messageObject.from_time
        from_username: messageObject.from_username
        from_lang: messageObject.from_lang

    id = Meteor.Chat.insert(entry)
    console.log "added chat id=[#{id}]:#{messageObject.message}. Chat.size is now
     #{Meteor.Chat.find({meetingId: meetingId}).count()}"

  sendChatMessagetoServer: (meetingId, chatObject) ->
    # check if this is a private or a public chat message
    eventName = ->
      if chatObject.chat_type is "PRIVATE_CHAT"
        "send_private_chat_message_request"
      else "send_public_chat_message_request"

    # translate the userId to the user's _id
    u = Meteor.Users.findOne({'userId':chatObject.from_userid})
    if u?
      chatObject.from_userid = u._id 
      # console.log "This is the message we're sending"
      # console.log JSON.stringify chatObject
      message =
        header :
          "timestamp": new Date().getTime()
          "name": eventName()
        payload:
          "message" : chatObject
          "meeting_id": meetingId
          "requester_id": chatObject.from_userid
     publish Meteor.config.redis.channels.toBBBApps.chat, message)

# --------------------------------------------------------------------------------------------
# Private methods on server
# --------------------------------------------------------------------------------------------
@deletePrivateChatMessages = (requesterUserId, requester_id, user1_id, user2_id) ->
	requester = Meteor.Users.findOne({_id: requester_id, userId: requesterUserId})
	u1 = Meteor.Users.findOne({_id: user1_id})
	u2 = Meteor.Users.findOne({_id: user2_id})

	if requester? and u1? and u2?
		# Delete messages if the requester is a moderator, or one of the participants
		if requester.role is "MODERATOR" or (requester._id is u1._id or requester._id is u2._id)
			console.log "deleting chat conversation"
			Meteor.Chat.remove({ # find all and remove private messages between the 2 users
				'message.chat_type': 'PRIVATE_CHAT',
				$or: [{'message.from_userid': u1._id, 'message.to_userid': u2._id},{'message.from_userid': u2._id, 'message.to_userid': u1._id}]
			})