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 rcpad2(x) {
 151                 return (x < 10 ? "0" : "") + x;
 152         }
 153         function rcpad3(x) {
 154                 return (x < 10 ? "00" : (x < 100 ? "0" : "")) + x;
 155         }
 156
 157         function rcformattime(t) {
 158                 var d = t.getDay();
 159                 d = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][d];
 160                 var h = t.getHours();
 161                 var m = t.getMinutes();
 162                 var s = t.getSeconds();
 163                 return d + " " + rcpad2(h) + ":" + rcpad2(m) + ":" + rcpad2(s);
 164         }
 165
 166         function rcaddservertimestamptohover(message, server) {
 167                 var divs = message.UI.getElementsByTagName("div");
 168                 var t = message.ServerTimes[server];
 169                 for (var i in divs) {
 170                         if (divs[i].getAttribute && divs[i].getAttribute("class") == "servertimestamps") {
 171                                 var d = document.createElement("div");
 172                                 var text = t.getFullYear() + "-" +
 173                                         rcpad2(t.getMonth()) + "-" +
 174                                         rcpad2(t.getDay()) + " " +
 175                                         rcformattime(t) + "." +
 176                                         rcpad3(t.getMilliseconds()) + " " +
 177                                         server;
 178                                 d.appendChild(document.createTextNode(text));
 179                                 divs[i].appendChild(d);
 180                         }
 181                 }
 182         }
 183
 184         function rcmakemessageUI(message) {
 185                 message.UI = document.createElement("div");
 186
 187                 // Server count
 188                 var servercount = document.createElement("span");
 189                 servercount.setAttribute("class", "servercount");
 190                 servercount.appendChild(document.createTextNode(Object.keys(message.ServerTimes).length));
 191                 message.UI.appendChild(servercount);
 192
 193                 // Timestamp
 194                 var timestamp_text = message.Time ? rcformattime(message.Time) : "";
 195                 var timestamp = document.createElement("span");
 196                 timestamp.setAttribute("class", "timestamp");
 197                 timestamp.appendChild(document.createTextNode(timestamp_text));
 198                 message.UI.appendChild(timestamp);
 199
 200                 // Timestamp hover
 201                 var timestamp_hover = document.createElement("div");
 202                 timestamp_hover.setAttribute("class", "servertimestamps");
 203                 timestamp.appendChild(timestamp_hover);
 204                 for (var server in message.ServerTimes) {
 205                         rcaddservertimestamptohover(message, server);
 206                 }
 207
 208                 // Classify different message types
 209                 var text_span = document.createElement("span");
 210                 var type;
 211                 if (/^\*\*\* /.test(message.Text)) {
 212                         type = "status";
 213                 } else if (/^\* /.test(message.Text)) {
 214                         type = "me";
 215                 } else {
 216                         type = "text";
 217                 }
 218                 if (Object.keys(message.ServerTimes).length == 0) {
 219                         type += " self";
 220                 }
 221                 text_span.setAttribute("class", type);
 222
 223                 // URL detection
 224                 var text = message.Text;
 225                 var URL_re = /\bhttps?:\/\/\S+/;
 226                 while (URL_re.test(text)) {
 227                         var match = URL_re.exec(text);
 228                         var leading_text = text.substr(0, match.index);
 229                         if (leading_text) {
 230                                 text_span.appendChild(document.createTextNode(leading_text));
 231                         }
 232                         var anchor = document.createElement("a");
 233                         anchor.setAttribute("rel", "nofollow");
 234                         anchor.setAttribute("href", encodeURI(match[0]));
 235                         anchor.appendChild(document.createTextNode(match[0]));
 236                         text_span.appendChild(anchor);
 237                         text = text.substr(match.index + match[0].length);
 238                 }
 239                 if (text) {
 240                         text_span.appendChild(document.createTextNode(text));
 241                 }
 242
 243                 message.UI.appendChild(text_span);
 244         }
 245
 246         function rcaddmessagetohistory(message) {
 247                 var message_i;
 248                 if (message.Time) {
 249                         for (var i = history.length - 1; ; i--) {
 250                                 if (i < 0 || (history[i].Time && message.Time >= history[i].Time)) {
 251                                         message_i = i+1;
 252                                         history.splice(message_i, 0, message);
 253                                         break;
 254                                 }
 255                         }
 256                 } else {
 257                         history.push(message);
 258                         message_i = history.length-1;
 259                 }
 260
 261                 if (!message.UI) {
 262                         rcmakemessageUI(message);
 263                 }
 264                 var h = document.getElementById("history");
 265                 if (message_i + 1 < history.length) {
 266                         h.insertBefore(message.UI, history[message_i + 1].UI);
 267                 } else {
 268                         h.appendChild(message.UI);
 269                 }
 270                 window.scrollTo(0, document.body.scrollHeight);
 271         }
 272
 273         function make_seen_key(id, text) {
 274                 return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
 275         }
 276
 277         function rcupdatemessagetime(message) {
 278                 // Set message.Time to be the median of message.ServerTimes
 279                 var times = [];
 280                 for (var i in message.ServerTimes) {
 281                         times.push(message.ServerTimes[i]);
 282                 }
 283                 times.sort();
 284                 if (times.length % 2) {
 285                         message.Time = times[(times.length-1)/2];
 286                 } else {
 287                         var middle = times.length/2;
 288                         var difference = times[middle].getTime() - times[middle-1].getTime();
 289                         message.Time = new Date(times[middle-1].getTime() + difference/2);
 290                 }
 291
 292                 // This may have broken history's in-sorted-order invariant
 293                 var hi = history.indexOf(message);
 294                 if ((history[hi-1] && history[hi-1].Time > message.Time) ||
 295                     (history[hi+1] && history[hi+1].Time < message.Time)) {
 296                         history.splice(hi,1);
 297                         rcaddmessagetohistory(message);
 298                 }
 299
 300                 // Update the UI
 301                 var spans = message.UI.getElementsByTagName("span");
 302                 for (var i in spans) {
 303                         if (spans[i].getAttribute) {
 304                                 var type = spans[i].getAttribute("class");
 305                                 if (type == "servercount") {
 306                                         spans[i].firstChild.data = Object.keys(message.ServerTimes).length;
 307                                 } else if (type == "timestamp") {
 308                                         spans[i].firstChild.data = rcformattime(message.Time);
 309                                 }
 310                         }
 311                 }
 312         }
 313
 314         function rcreceivemessages(server, messages) {
 315                 for (var i in messages) {
 316                         var m = messages[i];
 317                         m.Time = new Date(m.Time);
 318                         var seen_key = make_seen_key(m.ID, m.Text);
 319                         if (seen_key in seen) {
 320                                 seen[seen_key].ServerTimes[server] = m.Time;
 321                                 rcupdatemessagetime(seen[seen_key]);
 322                                 rcaddservertimestamptohover(seen[seen_key], server);
 323                         } else {
 324                                 m.ServerTimes = {};
 325                                 m.ServerTimes[server] = m.Time;
 326                                 seen[seen_key] = m;
 327                                 rcaddmessagetohistory(m);
 328                                 for (var i in servers) {
 329                                         rcchangeserverstatus(servers[i], "sad");
 330                                 }
 331                         }
 332                         rcchangeserverstatus(server, "happy");
 333                 }
 334         }
 335
 336         function rcfetch(server) {
 337                 var delay = 10000;  // TODO: Exponential backoff
 338                 var xhr = new XMLHttpRequest();
 339                 xhr.onreadystatechange = function() {
 340                         if (this.readyState == this.DONE) {
 341                                 if (this.status == 200) {
 342                                         var rtxt = this.responseText;
 343                                         if (rtxt != null) {
 344                                                 var messages = JSON.parse(rtxt);
 345                                                 if (messages != null) {
 346                                                         delay = 40;
 347                                                         if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
 348                                                                 since[server] = messages[messages.length-1].Time;
 349                                                         }
 350                                                         rcreceivemessages(server, messages);
 351                                                 }
 352                                         }
 353                                 }
 354                                 window.setTimeout(rcfetch, delay, server);
 355                         }
 356                 }
 357                 var uri = rcserverbase(server) + "/fetch";
 358                 if (server in since) {
 359                         uri += '?since="' + since[server] + '"';
 360                 }
 361                 xhr.open("GET", uri);
 362                 xhr.send();
 363         }
 364
 365         function rcconnect() {
 366                 for (var i in servers) {
 367                         rcfetch(servers[i]);
 368                         // Status bar entry
 369                         var status_indicator = document.createElement("span");
 370                         status_indicator.appendChild(document.createTextNode(servers[i]));
 371                         status_indicator.setAttribute("class", "sad");
 372                         document.getElementById("status").appendChild(status_indicator);
 373                 }
 374         }
 375
 376         function rcsend(d, message) {
 377                 message.ID = new Date().getTime() + "-" + session + "-" + Math.random();
 378                 seen[make_seen_key(message.ID, message.Text)] = message;
 379                 var path = "/speak" +
 380                         "?id=" + encodeURIComponent(message.ID) +
 381                         "&text=" + encodeURIComponent(message.Text);
 382                 for (var i in servers) {
 383                         var uri = rcserverbase(servers[i]) + path;
 384                         var img = document.createElement("img");
 385                         img.setAttribute("src", uri);
 386                         d.appendChild(img);
 387                 }
 388         }
 389
 390         function rcinput(input) {
 391                 var message;
 392                 var re = /^\/([a-z]+) (.*)/
 393                 var match = re.exec(input);
 394                 if (match && match[1] == 'me') {
 395                         message = "* " + rcnick() + "  " + match[2];
 396                 } else if (match && match[1] == 'nick') {
 397                         message = "*** " + rcnick() + " is now known as " + match[2];
 398                         rcsetnick(match[2]);
 399                 } else {
 400                         message = "<" + rcnick() + "> " + input;
 401                 }
 402
 403                 var m = {'Text': message, 'ServerTimes': {}};
 404                 rcaddmessagetohistory(m);
 405                 rcsend(m.UI, m);
 406         }
 407
 408         function rckeydown(event) {
 409                 if (event.keyCode == 13) {
 410                         rcinput(document.input.say.value);
 411                         document.input.say.value = "";
 412
 413                 }
 414         }
 415   //--><!]]></script>
 416
 417 </head>
 418
 419 <body onload="rcconnect()">
 420         <div id="container">
 421                 <div id="history"></div>
 422                 <div id="client">
 423                         <div id="input">
 424                                 <form name="input" onsubmit="return false" autocomplete="off">
 425                                         <input id="say" onkeydown="return rckeydown(event)" autocomplete="off" autofocus="autofocus"></input>
 426                                 </form></div>
 427                         <div id="status">&nbsp;</div>
 428                 </div>
 429         </div>
 430 </body>
 431 </html>