Open only one instance

Question

I’m in trouble, I want to open a window with window.open in a chat, this is how, when a user sends a message, the main panel receives the message by socket using websocket.onmessage, then opens a modal for the other person to see that someone sent this message, and in the modal has an event onclick which opens a window using window.open, so far so good, the problem is that I want to open this window which is assigned a ID only once, that is, if the other person sends a new message I check if the ID correspondent is already open, not to be showing the direct message even being already with the chat window open.

So I created the following function:

var winPop = false;

    function OpenWindow(msgdoc,url,idc){
      if(winPop && !winPop.closed){  //checka se a janela já está aberta
        winPop.focus();
      } else{
        $("#chattext").text(msgdoc);
        $("#cli").trigger('click');

        //Abre a janela quando o usuário clicar no modal
        $("#chat").click(function(){
            $(this).hide("slow");
            winPop = window.open(url,"_blank",+idc+',scrollbars=1,menubar=0,resizable=1,width=850,height=500');
        });

      }
    }

There in the socket I did the following:

websocket.onmessage = function(ev) {
  var msg = JSON.parse(ev.data); //Recebe os dados enviados pelo socket PHP
  var type = msg.type; //Recebe o Tipo de mensagem
  var umsg = msg.message; //Recebe Mensagem
  var de_id = msg.de_id; //Recebe de_id
  var url = 'http://siteta.com/chat/index.php?id='+de_id+'&nome='+uname+'&port=8080';
            OpenWindow(umsg,url,de_id);
}

That is, whenever you receive a new message, it will check if the window is already open, if it is not, it will show the modal, otherwise it will show nothing.

The problem is that if the user on the other side, send for example 5 messages, IE, the function will be called 5 times, the modal will be shown normally, but when clicking on it, will open 5 windows equal, but I just want to open only one window, even if the user sends 10 messages, making the function run 10 times, when clicking on the modal open only 1 Popup and not 10 as it is occurring, it is as if it were cached.

Answer 1

Assuming that the method window.open shall receive the following parameters::

window.open(url,nome_da_janela,atributos);

Where:

• url: URL of the page to be loaded in the window.
• wind_name: any name to identify the window.
• attributes: size, window position etc...

To set the window with the same id coming as function parameter, avoiding opening new windows to the same id, the correct would be:

winPop = window.open(url,idc,'scrollbars=1,menubar=0,resizable=1,width=850,height=500');