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         .servercount {
  60                 margin-right: 0.5em;
  61                 font-size: 70%;
  62         }
  63         .timestamp {
  64                 margin-right: 0.8em;
  65         }
  66         img { width: 1px; height: 1px; }
  67         iframe { display: none }
  68         #status span { margin-right: 10px; }
  69         #status span.sad {
  70                 background-color: #f00;
  71                 color: #fff;
  72                 border: 1px solid black;
  73                 border-radius: 5px;
  74                 padding-left: 5px;
  75                 padding-right: 5px;
  76         }
  77         #status span.happy {
  78                 background-color: #0f0;
  79                 color: #000;
  80                 border: 1px solid black;
  81                 border-radius: 5px;
  82                 padding-left: 5px;
  83                 padding-right: 5px;
  84         }
  85   /*]]>*/--></style>
  86   <script type="text/javascript"><!--//--><![CDATA[//><!--
  87         var servers = ['chkno.net', 'rc2.chkno.net', 'echto.net', 'the-wes.com', 'vibrantlogic.com'];
  88
  89         var session = Math.random();  // For outgoing message IDs
  90         var since = {};    // server -> time: For fetch?since=
  91         var seen = {};     // seen_key -> message
  92         var history = [];  // List of messages sorted by Time
  93         // Messages have these fields:
  94         //   Time: The timestamp.  Median of ServerTimes
  95         //   ID: Some unique string for deduping
  96         //   Text: The text of the message
  97         //   ServerTimes: server -> timestamp
  98         //   UI: The DOM node for this message in the UI
  99
 100         function rcnick() {
 101                 var nick = localStorage.getItem("nick");
 102                 if (nick) {
 103                         return nick;
 104                 }
 105                 return 'anonymous';
 106         }
 107
 108         function rcsetnick(new_nick) {
 109                 localStorage.setItem("nick", new_nick);
 110         }
 111
 112         function rcserverbase(server) {
 113                 // Add the default port if server doesn't contain a port number already
 114                 if (server.indexOf(":") == -1) {
 115                         return "http://" + server + ":21059";
 116                 } else {
 117                         return "http://" + server;
 118                 }
 119         }
 120
 121         function rcchangeserverstatus(server, new_status) {
 122                 var statusbar = document.getElementById("status");
 123                 var spans = statusbar.getElementsByTagName("span");
 124                 for (var i in spans) {
 125                         if (spans[i].firstChild && 'data' in spans[i].firstChild && spans[i].firstChild.data == server) {
 126                                 spans[i].setAttribute("class", new_status);
 127                         }
 128                 }
 129         }
 130
 131         function rcformattime(t) {
 132                 var d = t.getDay();
 133                 d = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][d];
 134                 var h = t.getHours();
 135                 var m = t.getMinutes();
 136                 var s = t.getSeconds();
 137                 function pad(x) {
 138                         return (x < 10 ? "0" : "") + x;
 139                 }
 140                 return d + " " + pad(h) + ":" + pad(m) + ":" + pad(s);
 141         }
 142
 143         function rcaddmessagetohistory(message) {
 144                 var message_i;
 145                 if (message.Time) {
 146                         for (var i = history.length - 1; ; i--) {
 147                                 if (i < 0 || (history[i].Time && message.Time >= history[i].Time)) {
 148                                         message_i = i+1;
 149                                         history.splice(message_i, 0, message);
 150                                         break;
 151                                 }
 152                         }
 153                 } else {
 154                         history.push(message);
 155                         message_i = history.length-1;
 156                 }
 157
 158                 if (!message.UI) {
 159                         message.UI = document.createElement("div");
 160
 161                         // Server count
 162                         var servercount = document.createElement("span");
 163                         servercount.setAttribute("class", "servercount");
 164                         servercount.appendChild(document.createTextNode(Object.keys(message.ServerTimes).length));
 165                         message.UI.appendChild(servercount);
 166
 167                         // Timestamp
 168                         var timestamp_text = message.Time ? rcformattime(message.Time) : "";
 169                         var timestamp = document.createElement("span");
 170                         timestamp.setAttribute("class", "timestamp");
 171                         timestamp.appendChild(document.createTextNode(timestamp_text));
 172                         message.UI.appendChild(timestamp);
 173
 174                         message.UI.appendChild(document.createTextNode(message.Text));
 175                 }
 176                 var h = document.getElementById("history");
 177                 if (message_i + 1 < history.length) {
 178                         h.insertBefore(message.UI, history[message_i + 1].UI);
 179                 } else {
 180                         h.appendChild(message.UI);
 181                 }
 182                 window.scrollTo(0, document.body.scrollHeight);
 183         }
 184
 185         function make_seen_key(id, text) {
 186                 return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
 187         }
 188
 189         function rcupdatemessagetime(message) {
 190                 // Set message.Time to be the median of message.ServerTimes
 191                 var times = [];
 192                 for (var i in message.ServerTimes) {
 193                         times.push(message.ServerTimes[i]);
 194                 }
 195                 times.sort();
 196                 if (times.length % 2) {
 197                         message.Time = times[(times.length-1)/2];
 198                 } else {
 199                         var middle = times.length/2;
 200                         var difference = times[middle].getTime() - times[middle-1].getTime();
 201                         message.Time = new Date(times[middle-1].getTime() + difference/2);
 202                 }
 203
 204                 // This may have broken history's in-sorted-order invariant
 205                 var hi = history.indexOf(message);
 206                 if ((history[hi-1] && history[hi-1].Time > message.Time) ||
 207                     (history[hi+1] && history[hi+1].Time < message.Time)) {
 208                         history.splice(hi,1);
 209                         rcaddmessagetohistory(message);
 210                 }
 211
 212                 // Update the UI
 213                 var spans = message.UI.getElementsByTagName("span");
 214                 for (var i in spans) {
 215                         if (spans[i].getAttribute) {
 216                                 var type = spans[i].getAttribute("class");
 217                                 if (type == "servercount") {
 218                                         spans[i].firstChild.data = Object.keys(message.ServerTimes).length;
 219                                 } else if (type == "timestamp") {
 220                                         spans[i].firstChild.data = rcformattime(message.Time);
 221                                 }
 222                         }
 223                 }
 224         }
 225
 226         function rcreceivemessages(server, messages) {
 227                 for (var i in messages) {
 228                         var m = messages[i];
 229                         m.Time = new Date(m.Time);
 230                         var seen_key = make_seen_key(m.ID, m.Text);
 231                         if (seen_key in seen) {
 232                                 seen[seen_key].ServerTimes[server] = m.Time;
 233                                 rcupdatemessagetime(seen[seen_key]);
 234                         } else {
 235                                 m.ServerTimes = {};
 236                                 m.ServerTimes[server] = m.Time;
 237                                 seen[seen_key] = m;
 238                                 rcaddmessagetohistory(m);
 239                                 for (var i in servers) {
 240                                         rcchangeserverstatus(servers[i], "sad");
 241                                 }
 242                         }
 243                         rcchangeserverstatus(server, "happy");
 244                 }
 245         }
 246
 247         function rcfetch(server) {
 248                 var delay = 10000;  // TODO: Exponential backoff
 249                 var xhr = new XMLHttpRequest();
 250                 xhr.onreadystatechange = function() {
 251                         if (this.readyState == this.DONE) {
 252                                 if (this.status == 200) {
 253                                         var rtxt = this.responseText;
 254                                         if (rtxt != null) {
 255                                                 var messages = JSON.parse(rtxt);
 256                                                 if (messages != null) {
 257                                                         delay = 40;
 258                                                         if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
 259                                                                 since[server] = messages[messages.length-1].Time;
 260                                                         }
 261                                                         rcreceivemessages(server, messages);
 262                                                 }
 263                                         }
 264                                 }
 265                                 window.setTimeout(rcfetch, delay, server);
 266                         }
 267                 }
 268                 var uri = rcserverbase(server) + "/fetch";
 269                 if (server in since) {
 270                         uri += '?since="' + since[server] + '"';
 271                 }
 272                 xhr.open("GET", uri);
 273                 xhr.send();
 274         }
 275
 276         function rcconnect() {
 277                 for (var i in servers) {
 278                         rcfetch(servers[i]);
 279                         // Status bar entry
 280                         var status_indicator = document.createElement("span");
 281                         status_indicator.appendChild(document.createTextNode(servers[i]));
 282                         status_indicator.setAttribute("class", "sad");
 283                         document.getElementById("status").appendChild(status_indicator);
 284                 }
 285         }
 286
 287         function rcsend(d, message) {
 288                 message.ID = new Date().getTime() + "-" + session + "-" + Math.random();
 289                 seen[make_seen_key(message.ID, message.Text)] = message;
 290                 var path = "/speak" +
 291                         "?id=" + encodeURIComponent(message.ID) +
 292                         "&text=" + encodeURIComponent(message.Text);
 293                 for (var i in servers) {
 294                         var uri = rcserverbase(servers[i]) + path;
 295                         var img = document.createElement("img");
 296                         img.setAttribute("src", uri);
 297                         d.appendChild(img);
 298                 }
 299         }
 300
 301         function rcinput(input) {
 302                 var message;
 303                 var re = /^\/([a-z]+) (.*)/
 304                 var match = re.exec(input);
 305                 if (match && match[1] == 'me') {
 306                         message = "* " + rcnick() + "  " + match[2];
 307                 } else if (match && match[1] == 'nick') {
 308                         message = "*** " + rcnick() + " is now known as " + match[2];
 309                         rcsetnick(match[2]);
 310                 } else {
 311                         message = "<" + rcnick() + "> " + input;
 312                 }
 313
 314                 var m = {'Text': message, 'ServerTimes': {}};
 315                 rcaddmessagetohistory(m);
 316                 rcsend(m.UI, m);
 317         }
 318
 319         function rckeydown(event) {
 320                 if (event.keyCode == 13) {
 321                         rcinput(document.input.say.value);
 322                         document.input.say.value = "";
 323
 324                 }
 325         }
 326   //--><!]]></script>
 327
 328 </head>
 329
 330 <body onload="rcconnect()">
 331         <div id="container">
 332                 <div id="history"></div>
 333                 <div id="client">
 334                         <div id="input">
 335                                 <form name="input" onsubmit="return false" autocomplete="off">
 336                                         <input id="say" onkeydown="return rckeydown(event)" autocomplete="off" autofocus="autofocus"></input>
 337                                 </form></div>
 338                         <div id="status">&nbsp;</div>
 339                 </div>
 340         </div>
 341 </body>
 342 </html>