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