function Chat () {
    this.update = updateChat;
    this.send = sendChat;
}

function updateChat(){
  
      var container=$('#chat-area');
  
       $.ajax({
         type: "POST",
         url: "http://www.catsfm.my/chat_sessions/chat",
         data: {  
            'function': 'update'
            },
         dataType: "json",
         success: function(data){
           //alert(data);
          var chatting = '';
          var userlogged;
         $.each(data, 
               function(i,item) {
                 if(item.ChatSession['created_by'] != null){
                  userlogged = 'logged'; 
                 }
                chatting += '<div class="ichat"><span class="chatname"><a href="#" class="'+userlogged+'" title="'+ item.ChatSession['name']+'">'+ item.ChatSession['name']+'</a> '+relativeTime(item.ChatSession['created'])+'</span><p class="chatmessage">'+item.ChatSession['message']+'</p></div>';
            userlogged = '';
            });
        container.html(chatting);
        container.jScrollPane();
        
         }
      });
  
}

//send the message
function sendChat(message, nickname)
{     
    $('#shoutcast').addClass('chat-loading');
     $.ajax({
       type: "POST",
       url: "http://www.catsfm.my/chat_sessions/chat",
       data: {  
          'function': 'send',
          'message': message,
          'nickname': nickname
         },
       success: function(data){
         updateChat();
         $('#shoutcast').removeClass('chat-loading');
       }
    });
}

function relativeTime(pastTime)
{ 
  var origStamp = Date.parse(pastTime);
  var curDate = new Date();
  var currentStamp = curDate.getTime();  
  var difference = parseInt((currentStamp - origStamp)/1000);

  if(difference < 0) return false;

  if(difference <= 5)       return "Just now";
  if(difference <= 20)      return "Seconds ago";
  if(difference <= 60)      return "A minute ago";
  if(difference < 3600)     return parseInt(difference/60)+" minutes ago";
  if(difference <= 1.5*3600)    return "One hour ago";
  if(difference < 23.5*3600)    return Math.round(difference/3600)+" hours ago";
  if(difference < 1.5*24*3600)  return "One day ago";
  
  var dateArr = pastTime.split(' ');
  return dateArr[4].replace(/\:\d+$/,'')+' '+dateArr[2]+' '+dateArr[1]+(dateArr[3]!=curDate.getFullYear()?' '+dateArr[3]:'');
}