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