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

   1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
   2   "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
   3 <html xmlns="http://www.w3.org/1999/xhtml">
   4 <!--
   5  reliable-chat - multipath chat
   6  Copyright (C) 2012  Scott Worley <sworley@chkno.net>
   7  Copyright (C) 2012  Jason Hibbs <skitch@gmail.com>
   8
   9  This program is free software: you can redistribute it and/or modify
  10  it under the terms of the GNU Affero General Public License as
  11  published by the Free Software Foundation, either version 3 of the
  12  License, or (at your option) any later version.
  13
  14  This program is distributed in the hope that it will be useful,
  15  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  GNU Affero General Public License for more details.
  18
  19  You should have received a copy of the GNU Affero General Public License
  20  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 -->
  22 <head>
  23  <title>Reliable Chat</title>
  24   <style type="text/css"><!--/*--><![CDATA[/*><!--*/
  25         html, body {
  26                 width: 99.9%;
  27                 height: 100%;
  28                 margin: 0;
  29                 padding: 0;
  30                 background-color: #293134;
  31                 color: silver;
  32                 font-family: monospace;
  33         }
  34         #container {
  35                 height: 100%;
  36         }
  37         #status {
  38                 width: 100%;
  39                 text-align: right;
  40                 background-color: #293134;
  41                 padding: 5px 5px 5px 0px;
  42         }
  43         #client {
  44                 width: 98.5%;
  45                 padding: 0px 0px 0px 5px;
  46                 height: 50px;
  47                 position: fixed;
  48                 bottom: 0;
  49         }
  50         #input {
  51                 width: 100%;
  52                 background-color: #293134;
  53         }
  54         #say { width: 100% }
  55         #history {
  56                 padding: 0px 5px 55px 5px;
  57                 vertical-align: bottom
  58         }
  59         img { width: 1px; height: 1px; }
  60         iframe { display: none }
  61         #status span { margin-right: 10px; }
  62         #status span.sad {
  63                 background-color: #f00;
  64                 color: #fff;
  65                 border: 1px solid black;
  66                 border-radius: 5px;
  67                 padding-left: 5px;
  68                 padding-right: 5px;
  69         }
  70         #status span.happy {
  71                 background-color: #0f0;
  72                 color: #000;
  73                 border: 1px solid black;
  74                 border-radius: 5px;
  75                 padding-left: 5px;
  76                 padding-right: 5px;
  77         }
  78   /*]]>*/--></style>
  79   <script type="text/javascript"><!--//--><![CDATA[//><!--
  80         var servers = ['chkno.net', 'rc2.chkno.net', 'echto.net', 'the-wes.com', 'vibrantlogic.com'];
  81
  82         var session = Math.random();  // For outgoing message IDs
  83         var since = {};    // server -> time: For fetch?since=
  84         var seen = {};     // seen_key -> message
  85         // Messages have these fields:
  86         //   Time: The server timestamp of the first copy to arrive
  87         //   ID: Some unique string for deduping
  88         //   Text: The text of the message
  89         //   UI: The DOM node for this message in the UI
  90
  91         function rcnick() {
  92                 var nick = localStorage.getItem("nick");
  93                 if (nick) {
  94                         return nick;
  95                 }
  96                 return 'anonymous';
  97         }
  98
  99         function rcsetnick(new_nick) {
 100                 localStorage.setItem("nick", new_nick);
 101         }
 102
 103         function rcserverbase(server) {
 104                 // Add the default port if server doesn't contain a port number already
 105                 if (server.indexOf(":") == -1) {
 106                         return "http://" + server + ":21059";
 107                 } else {
 108                         return "http://" + server;
 109                 }
 110         }
 111
 112         function rcchangeserverstatus(server, new_status) {
 113                 var statusbar = document.getElementById("status");
 114                 var spans = statusbar.getElementsByTagName("span");
 115                 for (var i in spans) {
 116                         if (spans[i].firstChild && 'data' in spans[i].firstChild && spans[i].firstChild.data == server) {
 117                                 spans[i].setAttribute("class", new_status);
 118                         }
 119                 }
 120         }
 121
 122         function rcformattime(t) {
 123                 var d = t.getDay();
 124                 d = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][d];
 125                 var h = t.getHours();
 126                 var m = t.getMinutes();
 127                 var s = t.getSeconds();
 128                 function pad(x) {
 129                         return (x < 10 ? "0" : "") + x;
 130                 }
 131                 return d + " " + pad(h) + ":" + pad(m) + ":" + pad(s);
 132         }
 133
 134         function rcaddmessagetohistory(message) {
 135                 message.UI = document.createElement("div");
 136                 var text = (message.Time ? rcformattime(message.Time) : "") + " " + message.Text;
 137                 message.UI.appendChild(document.createTextNode(text));
 138                 var h = document.getElementById("history");
 139                 h.appendChild(message.UI);
 140                 window.scrollTo(0, document.body.scrollHeight);
 141         }
 142
 143         function make_seen_key(id, text) {
 144                 return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
 145         }
 146
 147         function rcreceivemessages(server, messages) {
 148                 for (var i in messages) {
 149                         var m = messages[i];
 150                         m.Time = new Date(m.Time);
 151                         var seen_key = make_seen_key(m.ID, m.Text);
 152                         if (!(seen_key in seen)) {
 153                                 seen[seen_key] = m;
 154                                 rcaddmessagetohistory(m);
 155                                 for (var i in servers) {
 156                                         rcchangeserverstatus(servers[i], "sad");
 157                                 }
 158                         }
 159                         rcchangeserverstatus(server, "happy");
 160                 }
 161         }
 162
 163         function rcfetch(server) {
 164                 var delay = 10000;  // TODO: Exponential backoff
 165                 var xhr = new XMLHttpRequest();
 166                 xhr.onreadystatechange = function() {
 167                         if (this.readyState == this.DONE) {
 168                                 if (this.status == 200) {
 169                                         var rtxt = this.responseText;
 170                                         if (rtxt != null) {
 171                                                 var messages = JSON.parse(rtxt);
 172                                                 if (messages != null) {
 173                                                         delay = 40;
 174                                                         if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
 175                                                                 since[server] = messages[messages.length-1].Time;
 176                                                         }
 177                                                         rcreceivemessages(server, messages);
 178                                                 }
 179                                         }
 180                                 }
 181                                 window.setTimeout(rcfetch, delay, server);
 182                         }
 183                 }
 184                 var uri = rcserverbase(server) + "/fetch";
 185                 if (server in since) {
 186                         uri += '?since="' + since[server] + '"';
 187                 }
 188                 xhr.open("GET", uri);
 189                 xhr.send();
 190         }
 191
 192         function rcconnect() {
 193                 for (var i in servers) {
 194                         rcfetch(servers[i]);
 195                         // Status bar entry
 196                         var status_indicator = document.createElement("span");
 197                         status_indicator.appendChild(document.createTextNode(servers[i]));
 198                         status_indicator.setAttribute("class", "sad");
 199                         document.getElementById("status").appendChild(status_indicator);
 200                 }
 201         }
 202
 203         function rcsend(d, message) {
 204                 var id = new Date().getTime() + "-" + session + "-" + Math.random();
 205                 seen[make_seen_key(id, message)] = message;
 206                 var path = "/speak" +
 207                         "?id=" + encodeURIComponent(id) +
 208                         "&text=" + encodeURIComponent(message);
 209                 for (var i in servers) {
 210                         var uri = rcserverbase(servers[i]) + path;
 211                         var img = document.createElement("img");
 212                         img.setAttribute("src", uri);
 213                         d.appendChild(img);
 214                 }
 215         }
 216
 217         function rcinput(input) {
 218                 var message;
 219                 var re = /^\/([a-z]+) (.*)/
 220                 var match = re.exec(input);
 221                 if (match && match[1] == 'me') {
 222                         message = "* " + rcnick() + "  " + match[2];
 223                 } else if (match && match[1] == 'nick') {
 224                         message = "*** " + rcnick() + " is now known as " + match[2];
 225                         rcsetnick(match[2]);
 226                 } else {
 227                         message = "<" + rcnick() + "> " + input;
 228                 }
 229
 230                 var m = {'Text': message};
 231                 rcaddmessagetohistory(m);
 232                 rcsend(m.UI, m);
 233         }
 234
 235         function rckeydown(event) {
 236                 if (event.keyCode == 13) {
 237                         rcinput(document.input.say.value);
 238                         document.input.say.value = "";
 239
 240                 }
 241         }
 242   //--><!]]></script>
 243
 244 </head>
 245
 246 <body onload="rcconnect()">
 247         <div id="container">
 248                 <div id="history"></div>
 249                 <div id="client">
 250                         <div id="input">
 251                                 <form name="input" onsubmit="return false" autocomplete="off">
 252                                         <input id="say" onkeydown="return rckeydown(event)" autocomplete="off" autofocus="autofocus"></input>
 253                                 </form></div>
 254                         <div id="status">&nbsp;</div>
 255                 </div>
 256         </div>
 257 </body>
 258 </html>