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         a {
  35                 color: white;
  36         }
  37         #container {
  38                 height: 100%;
  39         }
  40         #status {
  41                 width: 100%;
  42                 text-align: right;
  43                 background-color: #293134;
  44                 padding: 5px 5px 5px 0px;
  45         }
  46         #client {
  47                 width: 98.5%;
  48                 padding: 0px 0px 0px 5px;
  49                 height: 50px;
  50                 position: fixed;
  51                 bottom: 0;
  52         }
  53         #input {
  54                 width: 100%;
  55                 background-color: #293134;
  56         }
  57         #say { width: 100% }
  58         #history {
  59                 padding: 0px 5px 55px 5px;
  60                 vertical-align: bottom
  61         }
  62         .banner {
  63                 font-size: 85%;
  64                 text-align: right;
  65         }
  66         .servercount {
  67                 margin-right: 0.5em;
  68                 font-size: 70%;
  69         }
  70         .timestamp {
  71                 margin-right: 0.8em;
  72         }
  73         .timestamp:hover, .timestamp:hover .servertimestamps {
  74                 background-color: #556;
  75         }
  76         .timestamp:hover .servertimestamps {
  77                 display: block;
  78         }
  79         .servertimestamps {
  80           display: none;
  81                 position: absolute;
  82                 left: 3em;
  83                 z-index: 1;
  84                 border: 1px solid black;
  85                 border-radius: 5px;
  86                 padding-left: 5px;
  87                 padding-right: 5px;
  88         }
  89         img { width: 1px; height: 1px; }
  90         iframe { display: none }
  91         #status span { margin-right: 10px; }
  92         #status span.sad {
  93                 background-color: #f00;
  94                 color: #fff;
  95                 border: 1px solid black;
  96                 border-radius: 5px;
  97                 padding-left: 5px;
  98                 padding-right: 5px;
  99         }
 100         #status span.happy {
 101                 background-color: #0f0;
 102                 color: #000;
 103                 border: 1px solid black;
 104                 border-radius: 5px;
 105                 padding-left: 5px;
 106                 padding-right: 5px;
 107         }
 108   /*]]>*/--></style>
 109   <script type="text/javascript"><!--//--><![CDATA[//><!--
 110         var servers = ['chkno.net', 'rc2.chkno.net', 'echto.net', 'the-wes.com', 'vibrantlogic.com'];
 111
 112         var session = Math.random();  // For outgoing message IDs
 113         var since = {};    // server -> time: For fetch?since=
 114         var seen = {};     // seen_key -> message
 115         var history = [];  // List of messages sorted by Time
 116         // Messages have these fields:
 117         //   Time: The timestamp.  Median of ServerTimes
 118         //   ID: Some unique string for deduping
 119         //   Text: The text of the message
 120         //   ServerTimes: server -> timestamp
 121         //   UI: The DOM node for this message in the UI
 122
 123         function rcnick() {
 124                 var nick = localStorage.getItem("nick");
 125                 if (nick) {
 126                         return nick;
 127                 }
 128                 return 'anonymous';
 129         }
 130
 131         function rcsetnick(new_nick) {
 132                 localStorage.setItem("nick", new_nick);
 133         }
 134
 135         function rcserverbase(server) {
 136                 // Add the default port if server doesn't contain a port number already
 137                 if (server.indexOf(":") == -1) {
 138                         return "http://" + server + ":21059";
 139                 } else {
 140                         return "http://" + server;
 141                 }
 142         }
 143
 144         function rcchangeserverstatus(server, new_status) {
 145                 var statusbar = document.getElementById("status");
 146                 var spans = statusbar.getElementsByTagName("span");
 147                 for (var i in spans) {
 148                         if (spans[i].firstChild && 'data' in spans[i].firstChild && spans[i].firstChild.data == server) {
 149                                 spans[i].setAttribute("class", new_status);
 150                         }
 151                 }
 152         }
 153
 154         function rcpad2(x) {
 155                 return (x < 10 ? "0" : "") + x;
 156         }
 157         function rcpad3(x) {
 158                 return (x < 10 ? "00" : (x < 100 ? "0" : "")) + x;
 159         }
 160
 161         function rcformattime(t) {
 162                 var d = t.getDay();
 163                 d = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][d];
 164                 var h = t.getHours();
 165                 var m = t.getMinutes();
 166                 var s = t.getSeconds();
 167                 return d + " " + rcpad2(h) + ":" + rcpad2(m) + ":" + rcpad2(s);
 168         }
 169
 170         function rcaddservertimestamptohover(message, server) {
 171                 var divs = message.UI.getElementsByTagName("div");
 172                 var t = message.ServerTimes[server];
 173                 for (var i in divs) {
 174                         if (divs[i].getAttribute && divs[i].getAttribute("class") == "servertimestamps") {
 175                                 var d = document.createElement("div");
 176                                 var text = t.getFullYear() + "-" +
 177                                         rcpad2(t.getMonth()) + "-" +
 178                                         rcpad2(t.getDay()) + " " +
 179                                         rcformattime(t) + "." +
 180                                         rcpad3(t.getMilliseconds()) + " " +
 181                                         server;
 182                                 d.appendChild(document.createTextNode(text));
 183                                 divs[i].appendChild(d);
 184                         }
 185                 }
 186         }
 187
 188         function rcmakemessageUI(message) {
 189                 message.UI = document.createElement("div");
 190
 191                 // Server count
 192                 var servercount = document.createElement("span");
 193                 servercount.setAttribute("class", "servercount");
 194                 servercount.appendChild(document.createTextNode(Object.keys(message.ServerTimes).length));
 195                 message.UI.appendChild(servercount);
 196
 197                 // Timestamp
 198                 var timestamp_text = message.Time ? rcformattime(message.Time) : "";
 199                 var timestamp = document.createElement("span");
 200                 timestamp.setAttribute("class", "timestamp");
 201                 timestamp.appendChild(document.createTextNode(timestamp_text));
 202                 message.UI.appendChild(timestamp);
 203
 204                 // Timestamp hover
 205                 var timestamp_hover = document.createElement("div");
 206                 timestamp_hover.setAttribute("class", "servertimestamps");
 207                 timestamp.appendChild(timestamp_hover);
 208                 for (var server in message.ServerTimes) {
 209                         rcaddservertimestamptohover(message, server);
 210                 }
 211
 212                 // Classify different message types
 213                 var text_span = document.createElement("span");
 214                 var type;
 215                 if (/^\*\*\* /.test(message.Text)) {
 216                         type = "status";
 217                 } else if (/^\* /.test(message.Text)) {
 218                         type = "me";
 219                 } else {
 220                         type = "text";
 221                 }
 222                 if (Object.keys(message.ServerTimes).length == 0) {
 223                         type += " self";
 224                 }
 225                 text_span.setAttribute("class", type);
 226
 227                 // URL detection
 228                 var text = message.Text;
 229                 var URL_re = /\bhttps?:\/\/\S+/;
 230                 while (URL_re.test(text)) {
 231                         var match = URL_re.exec(text);
 232                         var leading_text = text.substr(0, match.index);
 233                         if (leading_text) {
 234                                 text_span.appendChild(document.createTextNode(leading_text));
 235                         }
 236                         var anchor = document.createElement("a");
 237                         anchor.setAttribute("rel", "nofollow");
 238                         anchor.setAttribute("href", encodeURI(match[0]));
 239                         anchor.appendChild(document.createTextNode(match[0]));
 240                         text_span.appendChild(anchor);
 241                         text = text.substr(match.index + match[0].length);
 242                 }
 243                 if (text) {
 244                         text_span.appendChild(document.createTextNode(text));
 245                 }
 246
 247                 message.UI.appendChild(text_span);
 248         }
 249
 250         function rcaddmessagetohistory(message) {
 251                 var message_i;
 252                 if (message.Time) {
 253                         for (var i = history.length - 1; ; i--) {
 254                                 if (i < 0 || (history[i].Time && message.Time >= history[i].Time)) {
 255                                         message_i = i+1;
 256                                         history.splice(message_i, 0, message);
 257                                         break;
 258                                 }
 259                         }
 260                 } else {
 261                         history.push(message);
 262                         message_i = history.length-1;
 263                 }
 264
 265                 if (!message.UI) {
 266                         rcmakemessageUI(message);
 267                 }
 268                 var h = document.getElementById("history");
 269                 if (message_i + 1 < history.length) {
 270                         h.insertBefore(message.UI, history[message_i + 1].UI);
 271                 } else {
 272                         h.appendChild(message.UI);
 273                 }
 274                 window.scrollTo(0, document.body.scrollHeight);
 275         }
 276
 277         function make_seen_key(id, text) {
 278                 return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
 279         }
 280
 281         function rcupdatemessagetime(message) {
 282                 // Set message.Time to be the median of message.ServerTimes
 283                 var times = [];
 284                 for (var i in message.ServerTimes) {
 285                         times.push(message.ServerTimes[i]);
 286                 }
 287                 times.sort();
 288                 if (times.length % 2) {
 289                         message.Time = times[(times.length-1)/2];
 290                 } else {
 291                         var middle = times.length/2;
 292                         var difference = times[middle].getTime() - times[middle-1].getTime();
 293                         message.Time = new Date(times[middle-1].getTime() + difference/2);
 294                 }
 295
 296                 // This may have broken history's in-sorted-order invariant
 297                 var hi = history.indexOf(message);
 298                 if ((history[hi-1] && history[hi-1].Time > message.Time) ||
 299                     (history[hi+1] && history[hi+1].Time < message.Time)) {
 300                         history.splice(hi,1);
 301                         rcaddmessagetohistory(message);
 302                 }
 303
 304                 // Update the UI
 305                 var spans = message.UI.getElementsByTagName("span");
 306                 for (var i in spans) {
 307                         if (spans[i].getAttribute) {
 308                                 var type = spans[i].getAttribute("class");
 309                                 if (type == "servercount") {
 310                                         spans[i].firstChild.data = Object.keys(message.ServerTimes).length;
 311                                 } else if (type == "timestamp") {
 312                                         spans[i].firstChild.data = rcformattime(message.Time);
 313                                 }
 314                         }
 315                 }
 316         }
 317
 318         function rcreceivemessages(server, messages) {
 319                 for (var i in messages) {
 320                         var m = messages[i];
 321                         m.Time = new Date(m.Time);
 322                         var seen_key = make_seen_key(m.ID, m.Text);
 323                         if (seen_key in seen) {
 324                                 seen[seen_key].ServerTimes[server] = m.Time;
 325                                 rcupdatemessagetime(seen[seen_key]);
 326                                 rcaddservertimestamptohover(seen[seen_key], server);
 327                         } else {
 328                                 m.ServerTimes = {};
 329                                 m.ServerTimes[server] = m.Time;
 330                                 seen[seen_key] = m;
 331                                 rcaddmessagetohistory(m);
 332                                 for (var i in servers) {
 333                                         rcchangeserverstatus(servers[i], "sad");
 334                                 }
 335                         }
 336                         rcchangeserverstatus(server, "happy");
 337                 }
 338         }
 339
 340         function rcfetch(server) {
 341                 var delay = 10000;  // TODO: Exponential backoff
 342                 var xhr = new XMLHttpRequest();
 343                 xhr.onreadystatechange = function() {
 344                         if (this.readyState == this.DONE) {
 345                                 if (this.status == 200) {
 346                                         var rtxt = this.responseText;
 347                                         if (rtxt != null) {
 348                                                 var messages = JSON.parse(rtxt);
 349                                                 if (messages != null) {
 350                                                         delay = 40;
 351                                                         if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
 352                                                                 since[server] = messages[messages.length-1].Time;
 353                                                         }
 354                                                         rcreceivemessages(server, messages);
 355                                                 }
 356                                         }
 357                                 }
 358                                 window.setTimeout(rcfetch, delay, server);
 359                         }
 360                 }
 361                 var uri = rcserverbase(server) + "/fetch";
 362                 if (server in since) {
 363                         uri += '?since="' + since[server] + '"';
 364                 }
 365                 xhr.open("GET", uri);
 366                 xhr.send();
 367         }
 368
 369         function rcconnect() {
 370                 for (var i in servers) {
 371                         rcfetch(servers[i]);
 372                         // Status bar entry
 373                         var status_indicator = document.createElement("span");
 374                         status_indicator.appendChild(document.createTextNode(servers[i]));
 375                         status_indicator.setAttribute("class", "sad");
 376                         document.getElementById("status").appendChild(status_indicator);
 377                 }
 378         }
 379
 380         function rcsend(d, message) {
 381                 message.ID = new Date().getTime() + "-" + session + "-" + Math.random();
 382                 seen[make_seen_key(message.ID, message.Text)] = message;
 383                 var path = "/speak" +
 384                         "?id=" + encodeURIComponent(message.ID) +
 385                         "&text=" + encodeURIComponent(message.Text);
 386                 for (var i in servers) {
 387                         var uri = rcserverbase(servers[i]) + path;
 388                         var img = document.createElement("img");
 389                         img.setAttribute("src", uri);
 390                         d.appendChild(img);
 391                 }
 392         }
 393
 394         function rcinput(input) {
 395                 var message;
 396                 var re = /^\/([a-z]+) (.*)/
 397                 var match = re.exec(input);
 398                 if (match && match[1] == 'me') {
 399                         message = "* " + rcnick() + "  " + match[2];
 400                 } else if (match && match[1] == 'nick') {
 401                         message = "*** " + rcnick() + " is now known as " + match[2];
 402                         rcsetnick(match[2]);
 403                 } else {
 404                         message = "<" + rcnick() + "> " + input;
 405                 }
 406
 407                 var m = {'Text': message, 'ServerTimes': {}};
 408                 rcaddmessagetohistory(m);
 409                 rcsend(m.UI, m);
 410         }
 411
 412         function rckeydown(event) {
 413                 if (event.keyCode == 13) {
 414                         rcinput(document.input.say.value);
 415                         document.input.say.value = "";
 416
 417                 }
 418         }
 419   //--><!]]></script>
 420
 421 </head>
 422
 423 <body onload="rcconnect()">
 424         <div id="container">
 425                 <div class="banner">(You are using <a href="https://github.com/chkno/reliable-chat">Reliable Chat</a>)</div>
 426                 <div id="history"></div>
 427                 <div id="client">
 428                         <div id="input">
 429                                 <form name="input" onsubmit="return false" autocomplete="off">
 430                                         <input id="say" onkeydown="return rckeydown(event)" autocomplete="off" autofocus="autofocus"></input>
 431                                 </form></div>
 432                         <div id="status">&nbsp;</div>
 433                 </div>
 434         </div>
 435 </body>
 436 </html>