git.scottworley.com Git - reliable-chat/blob - webclient/rc.js

   1 var servers = ['chkno.net', 'localhost'];
   2
   3 var session = Math.random();
   4 var seen = {};
   5
   6 function rcserverbase(server) {
   7         // Add the default port if server doesn't contain a port number already
   8         if (server.indexOf(":") == -1) {
   9                 return "http://" + server + ":21059";
  10         } else {
  11                 return "http://" + server;
  12         }
  13 }
  14
  15 function rcaddmessagetohistory(message) {
  16         var d = document.createElement("div");
  17         d.appendChild(document.createTextNode(message));
  18         var h = document.getElementById("history");
  19         h.appendChild(d);
  20         window.scrollTo(0, document.body.scrollHeight);
  21         return d;
  22 }
  23
  24 function make_seen_key(id, text) {
  25         return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
  26 }
  27
  28 function receiveMessage(server, time, id, text) {
  29         var seen_key = make_seen_key(id, text);
  30         if (!(seen_key in seen)) {
  31                 seen[seen_key] = true;
  32                 rcaddmessagetohistory(text);
  33         }
  34 }
  35
  36 function receiveMessageEvent(event)
  37 {
  38         for (i in servers) {
  39                 if (event.origin === rcserverbase(servers[i])) {
  40                         messages = JSON.parse(event.data);
  41                         for (j in messages) {
  42                                 if ('Time' in messages[j] &&
  43                                     'ID'   in messages[j] &&
  44                                     'Text' in messages[j]) {
  45                                         receiveMessage(servers[i], messages[j]['Time'], messages[j]['ID'], messages[j]['Text']);
  46                                 }
  47                         }
  48                 }
  49         }
  50 }
  51
  52 function rcconnect() {
  53         window.addEventListener("message", receiveMessageEvent, false);
  54         for (i in servers) {
  55                 // Create a hidden iframe for same-origin workaround
  56                 var iframe = document.createElement("iframe");
  57                 iframe.setAttribute("src", rcserverbase(servers[i]) + "/frame");
  58                 document.body.insertBefore(iframe, document.body.firstChild);
  59         }
  60 }
  61
  62 function rcsend(d, message) {
  63         var id = new Date().getTime() + "-" + session + "-" + Math.random();
  64         seen[make_seen_key(id, message)] = true;
  65         var path = "/speak" +
  66                 "?id=" + encodeURIComponent(id) +
  67                 "&text=" + encodeURIComponent(message);
  68         for (i in servers) {
  69                 var uri = rcserverbase(servers[i]) + path;
  70                 var img = document.createElement("img");
  71                 img.setAttribute("src", uri);
  72                 d.appendChild(img);
  73         }
  74 }
  75
  76 function rckeydown(event) {
  77         if (event.keyCode == 13) {
  78                 var d = rcaddmessagetohistory(document.input.say.value);
  79                 rcsend(d, document.input.say.value);
  80                 document.input.say.value = "";
  81                 return false;
  82         }
  83 }