moved chat code to its own module

public/src/modules/chat.js

@@ -0,0 +1,91 @@
+define(['taskbar'], function(taskbar) {
+	
+	var module = {};
+
+	
+	module.bringModalToTop = function(chatModal) {
+		var topZ = 0;
+		$('.modal').each(function() {
+		  var thisZ = parseInt($(this).css('zIndex'), 10);
+		  if (thisZ > topZ) {
+		    topZ = thisZ;
+		  }
+		});
+		chatModal.css('zIndex', topZ+1);
+	}
+
+	module.createModalIfDoesntExist = function(username, touid) {
+		var chatModal = $('#chat-modal-'+touid);
+
+		if(!chatModal.length) {
+			var chatModal = $('#chat-modal').clone();
+			chatModal.attr('id','chat-modal-'+touid);
+			chatModal.appendTo($('body'));
+			chatModal.draggable({
+				start:function(){
+					bringModalToTop(chatModal);
+				}
+			});
+			chatModal.find('#chat-with-name').html(username);
+
+			chatModal.find('.close').on('click',function(e){
+				chatModal.hide();
+			});
+
+			chatModal.on('click', function(e){
+				module.bringModalToTop(chatModal);
+			});
+
+			addSendHandler(chatModal, touid);	
+		}
+
+		return chatModal;
+	}
+
+	function addSendHandler(chatModal, touid) {
+		chatModal.find('#chat-message-input').off('keypress');
+		chatModal.find('#chat-message-input').on('keypress', function(e) {
+			if(e.which === 13) {
+				sendMessage(chatModal, touid);
+			}
+		});
+
+		chatModal.find('#chat-message-send-btn').off('click');
+		chatModal.find('#chat-message-send-btn').on('click', function(e){
+			sendMessage(chatModal, touid);
+			return false;
+		});
+	}
+
+	function sendMessage(chatModal, touid) {
+		var msg = app.strip_tags(chatModal.find('#chat-message-input').val());
+		if(msg.length) {
+			msg = msg +'\n';
+			socket.emit('sendChatMessage', { touid:touid, message:msg});
+			chatModal.find('#chat-message-input').val('');
+			appendChatMessage(chatModal, 'You : ' + msg);
+		}
+	}
+
+	socket.on('chatMessage', function(data){
+		var username = data.username;
+		var fromuid = data.fromuid;
+		var message = data.message;
+
+		var chatModal = module.createModalIfDoesntExist(username, fromuid);
+		chatModal.show();
+		module.bringModalToTop(chatModal);
+	
+		appendChatMessage(chatModal, message)
+	});
+
+	function appendChatMessage(chatModal, message){
+		var chatContent = chatModal.find('#chat-content');
+		chatContent.append(message);
+		chatContent.scrollTop(
+    		chatContent[0].scrollHeight - chatContent.height()
+		);
+	}
+
+	return module;
+});