bigbluebutton-Github/labs/meteor-client/client/views/chat/chat_bar.coffee

@sendMessage = ->
  message = linkify $('#newMessageInput').val() # get the message from the input box
  unless (message?.length > 0 and (/\S/.test(message))) # check the message has content and it is not whitespace
    return # do nothing if invalid message

  chattingWith = getInSession('inChatWith')

  if chattingWith isnt "PUBLIC_CHAT" 
    dest = Meteor.Users.findOne("userId": chattingWith)

  messageForServer = { # construct message for server
    "message": message
    "chat_type": if chattingWith is "PUBLIC_CHAT" then "PUBLIC_CHAT" else "PRIVATE_CHAT"
    "from_userid": getInSession("userId")
    "from_username": getUsersName()
    "from_tz_offset": "240"
    "to_username": if chattingWith is "PUBLIC_CHAT" then "public_chat_username" else dest.user.name
    "to_userid": if chattingWith is "PUBLIC_CHAT" then "public_chat_userid" else chattingWith
    "from_lang": "en"
    "from_time": getTime()
    "from_color": "0"
  }
  # console.log 'Sending message to server:'
  # console.log messageForServer
  Meteor.call "sendChatMessagetoServer", getInSession("meetingId"), messageForServer
  $('#newMessageInput').val '' # Clear message box

Template.chatInput.events
  'click #sendMessageButton': (event) ->
    sendMessage()
  'keypress #newMessageInput': (event) -> # user pressed a button inside the chatbox
    if event.which is 13 # Check for pressing enter to submit message
      sendMessage()

Template.chatInput.rendered  = ->
   $('input[rel=tooltip]').tooltip()
   $('button[rel=tooltip]').tooltip()

Template.chatbar.helpers
	getChatGreeting: ->
		greeting = 
		"<div class='chatGreeting'>
		<p>Welcome to #{getMeetingName()}!</p>
		<p>For help on using BigBlueButton see these (short) <a href='http://www.bigbluebutton.org/videos/' target='_blank'>tutorial videos</a>.</p>
		<p>To join the audio bridge click the headset icon (upper-left hand corner).  Use a headset to avoid causing background noise for others.</p>
		<br/>
		<p>This server is running BigBlueButton #{getInSession 'bbbServerVersion'}.</p>
		</div>"

	# This method returns all messages for the user. It looks at the session to determine whether the user is in
	#private or public chat. If true is passed, messages returned are from before the user joined. Else, the messages are from after the user joined
	getFormattedMessagesForChat: () ->
		friend = chattingWith = getInSession('inChatWith') # the recipient(s) of the messages
		after = before = greeting = []

		if chattingWith is 'PUBLIC_CHAT' # find all public messages
		    before = Meteor.Chat.find({'message.chat_type': chattingWith, 'message.from_time': {$lt: String(getInSession("joinedAt"))}}).fetch()
		    after = Meteor.Chat.find({'message.chat_type': chattingWith, 'message.from_time': {$gt: String(getInSession("joinedAt"))}}).fetch()

		    greeting = [
		      'class': 'chatGreeting',
		      'message':
		        'message': Template.chatbar.getChatGreeting(),
		        'from_username': 'System',
		        'from_time': getTime()
		    ]
		else
		  me = getInSession("userId")
		  after = Meteor.Chat.find({ # find all messages between current user and recipient
		    'message.chat_type': 'PRIVATE_CHAT',
		    $or: [{'message.from_userid': me, 'message.to_userid': friend},{'message.from_userid': friend, 'message.to_userid': me}]
		  }).fetch()   

		messages = (before.concat greeting).concat after
		###
		# Now after all messages + the greeting have been inserted into our collection, what we have to do is go through all messages
		# and modify them to join all sequential messages by users together so each entries will be chat messages by a user in the same time frame
		# we can use a time frame, so join messages together that are within 5 minutes of eachother, for example
		###

  # gets messages and groups them by username (username doesn't repeat in successive messages)
  # timestamps in messages from the same user doesn't repeat
  getCombinedMessagesForChat: () ->
    msgs = Template.chatbar.getFormattedMessagesForChat()
    prev_time = msgs[0].message.from_time
    prev_userid = msgs[0].message.from_userid
    for i in [0...msgs.length]
      if i != 0
        if prev_userid == msgs[i].message.from_userid
          msgs[i].message.from_username = ''
          if Template.message.toClockTime(msgs[i].message.from_time) == Template.message.toClockTime(prev_time)
            prev_time = msgs[i].message.from_time
            msgs[i].message.from_time = null
          else
            prev_time = msgs[i].message.from_time
        else
          prev_time = msgs[i].message.from_time
        prev_userid = msgs[i].message.from_userid
    msgs
    
Template.message.rendered = -> # When a message has been added and finished rendering, scroll to the bottom of the chat
  $('#chatbody').scrollTop($('#chatbody')[0].scrollHeight)

Template.optionsBar.events
    'click .private-chat-user-entry': (event) -> # clicked a user's name to begin private chat
        setInSession 'display_chatPane', true
        setInSession "inChatWith", @userId
        me = getInSession("userId")

        if Meteor.Chat.find({'message.chat_type': 'PRIVATE_CHAT', $or: [{'message.from_userid': me, 'message.to_userid': @userId},{'message.from_userid': @userId, 'message.to_userid': me}]}).fetch().length is 0
            messageForServer =
                "message": "#{getUsersName()} has joined private chat with #{@user.name}."
                "chat_type": "PRIVATE_CHAT"
                "from_userid": me
                "from_username": getUsersName()
                "from_tz_offset": "240"
                "to_username": @user.name
                "to_userid": @userId
                "from_lang": "en"
                "from_time": getTime()
                "from_color": "0"
            Meteor.call "sendChatMessagetoServer", getInSession("meetingId"), messageForServer

Template.optionsBar.rendered = ->
	$('div[rel=tooltip]').tooltip()

Template.optionsFontSize.events
	"click .fontSizeSelector": (event) ->
		selectedFontSize = parseInt(event.target.id)
		if selectedFontSize
			setInSession "messageFontSize", selectedFontSize
		else setInSession "messageFontSize", 12

Template.tabButtons.events
  'click .close': (event) -> # user closes private chat
    setInSession 'inChatWith', 'PUBLIC_CHAT'
    setInSession 'display_chatPane', true
    Meteor.call("deletePrivateChatMessages", getInSession("userId"), @userId)
    return false # stops propogation/prevents default

  'click .optionsChatTab': (event) ->
    setInSession 'display_chatPane', false

  'click .privateChatTab': (event) ->
    setInSession 'display_chatPane', true
    console.log ".private"

  'click .publicChatTab': (event) ->
    setInSession 'display_chatPane', true

  'click .tab': (event) -> 
    setInSession "inChatWith", @userId
  
Template.tabButtons.helpers
  getChatbarTabs: ->
    tabs = makeTabs()

  makeTabButton: -> # create tab button for private chat or other such as options
    button = '<li '
    button += 'class="'
    button += 'active ' if getInSession("inChatWith") is @userId
    button += "tab #{@class}\"><a href=\"#\" data-toggle=\"tab\">#{@name}"
    button += '&nbsp;<button class="close closeTab" type="button" >×</button>' if @class is 'privateChatTab'
    button += '</a></li>'
    button

Template.message.helpers
  toClockTime: (epochTime) ->
    if epochTime == null
      return ""
    local = new Date()
    offset = local.getTimezoneOffset()
    epochTime = epochTime - offset * 60000 # 1 min = 60 s = 60,000 ms
    dateObj = new Date(epochTime)
    hours = dateObj.getUTCHours()
    minutes = dateObj.getUTCMinutes()
    if minutes < 10
      minutes = "0" + minutes
    hours + ":" + minutes

  # make links received from Flash client clickable in HTML
  toClickable: (str) ->
    res = str.replace /<a href='event:/gim, "<a target='_blank' href='"
    res.replace /<a href="event:/gim, '<a target="_blank" href="'