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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: 100%;
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: #ddd;
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: 100%;
48 position: fixed;
49 bottom: 0;
50 }
51 #input {
52 width: 100%;
53 background-color: #293134;
54 }
55 #say { width: 100% }
56 #history {
57 padding: 0px 5px 30px 5px;
58 vertical-align: bottom;
59 }
60 .banner {
61 font-size: 85%;
62 text-align: right;
63 }
64 .servercount {
65 margin-right: -0.5em;
66 font-size: 70%;
67 }
68 .timestamp:hover, .timestamp:hover .servertimestamps {
69 background-color: #556;
70 }
71 .timestamp:hover .servertimestamps {
72 display: block;
73 }
74 .servertimestamps {
75 display: none;
76 position: absolute;
77 left: 3em;
78 z-index: 1;
79 border: 1px solid black;
80 border-radius: 5px;
81 padding-left: 5px;
82 padding-right: 5px;
83 }
84 img { width: 1px; height: 1px; }
85 iframe { display: none }
86 #status span { margin-right: 10px; }
87 #status span.sad {
88 background-color: #f00;
89 color: #fff;
90 border: 1px solid black;
91 border-radius: 5px;
92 padding-left: 5px;
93 padding-right: 5px;
94 }
95 #status span.happy {
96 background-color: #0f0;
97 color: #000;
98 border: 1px solid black;
99 border-radius: 5px;
100 padding-left: 5px;
101 padding-right: 5px;
102 }
103
104 /* BEGIN expando input box trick kindly provided by http://www.alistapart.com/articles/expanding-text-areas-made-elegant/ */
105 .expandingArea {
106 position: relative;
107 border: 1px solid #888;
108 background: silver;
109 }
110 .expandingArea > textarea,
111 .expandingArea > pre {
112 margin: 0;
113 outline: 0;
114 border: 0;
115 padding: 5px;
116 background: transparent;
117 font: 400 13px/16px helvetica, arial, sans-serif;
118 /* Make the text soft-wrap */
119 white-space: pre-wrap;
120 word-wrap: break-word;
121 }
122 .expandingArea > textarea {
123 /* The border-box box model is used to allow
124 * padding whilst still keeping the overall width
125 * at exactly that of the containing element.
126 */
127 -webkit-box-sizing: border-box;
128 -moz-box-sizing: border-box;
129 -ms-box-sizing: border-box;
130 box-sizing: border-box;
131 width: 100%;
132 /* Hide any scrollbars */
133 overflow: hidden;
134 position: absolute;
135 top: 0;
136 left: 0;
137 height: 100%;
138 /* Remove WebKit user-resize widget */
139 resize: none;
140 }
141 .expandingArea > pre {
142 display: block;
143 /* Hide the text; just using it for sizing */
144 visibility: hidden;
145 }
146 /* END expando input box trick kindly provided by http://www.alistapart.com/articles/expanding-text-areas-made-elegant/ */
147
148 /*]]>*/--></style>
149 <script type="text/javascript"><!--//--><![CDATA[//><!--
150 var servers = ['chkno.net', 'rc2.chkno.net', 'reliablechat-chk.rhcloud.com:80', 'intense-basin-3395.herokuapp.com:80', 'echto.net', 'the-wes.com', 'vibrantlogic.com'];
151
152 var session = Math.random(); // For outgoing message IDs
153 var since = {}; // server -> time: For fetch?since=
154 var seen = {}; // seen_key -> message
155 var history = []; // List of messages sorted by Time
156 // Messages have these fields:
157 // Time: The timestamp. Median of ServerTimes
158 // ID: Some unique string for deduping
159 // Text: The text of the message
160 // ServerTimes: server -> timestamp
161 // UI: The DOM node for this message in the UI
162
163 function rcnick() {
164 var nick = localStorage.getItem("nick");
165 if (nick) {
166 return nick;
167 }
168 return 'anonymous';
169 }
170
171 function rcsetnick(new_nick) {
172 localStorage.setItem("nick", new_nick);
173 }
174
175 function rcserverbase(server) {
176 // Add the default port if server doesn't contain a port number already
177 if (server.indexOf(":") == -1) {
178 return "http://" + server + ":21059";
179 } else {
180 return "http://" + server;
181 }
182 }
183
184 function rcchangeserverstatus(server, new_status) {
185 var statusbar = document.getElementById("status");
186 var spans = statusbar.getElementsByTagName("span");
187 for (var i in spans) {
188 if (spans[i].firstChild && 'data' in spans[i].firstChild && spans[i].firstChild.data == server) {
189 spans[i].setAttribute("class", new_status);
190 }
191 }
192 }
193
194 function rcpad2(x) {
195 return (x < 10 ? "0" : "") + x;
196 }
197 function rcpad3(x) {
198 return (x < 10 ? "00" : (x < 100 ? "0" : "")) + x;
199 }
200
201 function rcformattime(t) {
202 var d = t.getDay();
203 d = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][d];
204 var h = t.getHours();
205 var m = t.getMinutes();
206 var s = t.getSeconds();
207 return d + " " + rcpad2(h) + ":" + rcpad2(m) + ":" + rcpad2(s);
208 }
209
210 function rcaddservertimestamptohover(message, server) {
211 var divs = message.UI.getElementsByTagName("div");
212 var t = message.ServerTimes[server];
213 for (var i in divs) {
214 if (divs[i].getAttribute && divs[i].getAttribute("class") == "servertimestamps") {
215 var d = document.createElement("div");
216 var text = t.getFullYear() + "-" +
217 rcpad2(t.getMonth()) + "-" +
218 rcpad2(t.getDay()) + " " +
219 rcformattime(t) + "." +
220 rcpad3(t.getMilliseconds()) + " " +
221 server;
222 d.appendChild(document.createTextNode(text));
223 divs[i].appendChild(d);
224 }
225 }
226 }
227
228 function rcmakemessageUI(message) {
229 message.UI = document.createElement("div");
230
231 // Server count
232 var servercount = document.createElement("span");
233 servercount.setAttribute("class", "servercount");
234 servercount.appendChild(document.createTextNode(Object.keys(message.ServerTimes).length));
235 message.UI.appendChild(servercount);
236 message.UI.appendChild(document.createTextNode(" "));
237
238 // Timestamp
239 var timestamp_text = message.Time ? rcformattime(message.Time) : "";
240 var timestamp = document.createElement("span");
241 timestamp.setAttribute("class", "timestamp");
242 timestamp.appendChild(document.createTextNode(timestamp_text));
243 message.UI.appendChild(timestamp);
244 message.UI.appendChild(document.createTextNode(" "));
245
246 // Timestamp hover
247 var timestamp_hover = document.createElement("div");
248 timestamp_hover.setAttribute("class", "servertimestamps");
249 timestamp.appendChild(timestamp_hover);
250 for (var server in message.ServerTimes) {
251 rcaddservertimestamptohover(message, server);
252 }
253
254 // Classify different message types
255 var text_span = document.createElement("span");
256 var type;
257 if (/^\*\*\* /.test(message.Text)) {
258 type = "status";
259 } else if (/^\* /.test(message.Text)) {
260 type = "me";
261 } else {
262 type = "text";
263 }
264 if (Object.keys(message.ServerTimes).length == 0) {
265 type += " self";
266 }
267 text_span.setAttribute("class", type);
268
269 // URL detection
270 var text = message.Text;
271 var URL_re = /\bhttps?:\/\/\S+/;
272 while (URL_re.test(text)) {
273 var match = URL_re.exec(text);
274 var leading_text = text.substr(0, match.index);
275 if (leading_text) {
276 text_span.appendChild(document.createTextNode(leading_text));
277 }
278 var anchor = document.createElement("a");
279 anchor.setAttribute("rel", "nofollow");
280 anchor.setAttribute("href", encodeURI(match[0]));
281 anchor.appendChild(document.createTextNode(match[0]));
282 text_span.appendChild(anchor);
283 text = text.substr(match.index + match[0].length);
284 }
285 if (text) {
286 text_span.appendChild(document.createTextNode(text));
287 }
288
289 message.UI.appendChild(text_span);
290 }
291
292 function rcaddmessagetohistory(message) {
293 var message_i;
294 if (message.Time) {
295 for (var i = history.length - 1; ; i--) {
296 if (i < 0 || (history[i].Time && message.Time >= history[i].Time)) {
297 message_i = i+1;
298 history.splice(message_i, 0, message);
299 break;
300 }
301 }
302 } else {
303 history.push(message);
304 message_i = history.length-1;
305 }
306 if (message_i + 1 < history.length) {
307 rcaddmessagetoUI(message, history[message_i + 1].UI);
308 } else {
309 rcaddmessagetoUI(message, null);
310 }
311 }
312
313 function rcaddmessagetoUI(message, before) {
314 if (!message.UI) {
315 rcmakemessageUI(message);
316 }
317 var h = document.getElementById("history");
318 if (before) {
319 h.insertBefore(message.UI, before);
320 } else {
321 h.appendChild(message.UI);
322 }
323 window.scrollTo(0, document.body.scrollHeight);
324 }
325
326 function make_seen_key(id, text) {
327 return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
328 }
329
330 function rcupdatemessagetime(message) {
331 // Set message.Time to be the median of message.ServerTimes
332 var times = [];
333 for (var i in message.ServerTimes) {
334 times.push(message.ServerTimes[i]);
335 }
336 times.sort();
337 if (times.length % 2) {
338 message.Time = times[(times.length-1)/2];
339 } else {
340 var middle = times.length/2;
341 var difference = times[middle].getTime() - times[middle-1].getTime();
342 message.Time = new Date(times[middle-1].getTime() + difference/2);
343 }
344
345 // This may have broken history's in-sorted-order invariant
346 var hi = history.indexOf(message);
347 if ((history[hi-1] && history[hi-1].Time > message.Time) ||
348 (history[hi+1] && history[hi+1].Time < message.Time)) {
349 history.splice(hi,1);
350 rcaddmessagetohistory(message);
351 }
352
353 // Update the UI
354 var spans = message.UI.getElementsByTagName("span");
355 for (var i in spans) {
356 if (spans[i].getAttribute) {
357 var type = spans[i].getAttribute("class");
358 if (type == "servercount") {
359 spans[i].firstChild.data = Object.keys(message.ServerTimes).length;
360 } else if (type == "timestamp") {
361 spans[i].firstChild.data = rcformattime(message.Time);
362 }
363 }
364 }
365 }
366
367 function rcreceivemessages(server, messages) {
368 for (var i in messages) {
369 var m = messages[i];
370 m.Time = new Date(m.Time);
371 var seen_key = make_seen_key(m.ID, m.Text);
372 if (seen_key in seen) {
373 seen[seen_key].ServerTimes[server] = m.Time;
374 rcupdatemessagetime(seen[seen_key]);
375 rcaddservertimestamptohover(seen[seen_key], server);
376 } else {
377 m.ServerTimes = {};
378 m.ServerTimes[server] = m.Time;
379 seen[seen_key] = m;
380 rcaddmessagetohistory(m);
381 for (var i in servers) {
382 rcchangeserverstatus(servers[i], "sad");
383 }
384 }
385 rcchangeserverstatus(server, "happy");
386 }
387 }
388
389 function rcfetch(server) {
390 var delay = 10000; // TODO: Exponential backoff
391 var xhr = new XMLHttpRequest();
392 xhr.onreadystatechange = function() {
393 if (this.readyState == this.DONE) {
394 if (this.status == 200) {
395 var rtxt = this.responseText;
396 if (rtxt != null) {
397 var messages = JSON.parse(rtxt);
398 if (messages != null) {
399 delay = 40;
400 if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
401 since[server] = messages[messages.length-1].Time;
402 }
403 rcreceivemessages(server, messages);
404 }
405 }
406 }
407 window.setTimeout(rcfetch, delay, server);
408 }
409 }
410 var uri = rcserverbase(server) + "/fetch";
411 if (server in since) {
412 uri += '?since="' + since[server] + '"';
413 }
414 xhr.open("GET", uri);
415 xhr.send();
416 }
417
418 function rcconnect() {
419 makeExpandingArea(document.getElementById("expando"));
420 for (var i in servers) {
421 rcfetch(servers[i]);
422 // Status bar entry
423 var status_indicator = document.createElement("span");
424 status_indicator.appendChild(document.createTextNode(servers[i]));
425 status_indicator.setAttribute("class", "sad");
426 document.getElementById("status").appendChild(status_indicator);
427 }
428 }
429
430 function rcsend(d, message) {
431 message.ID = new Date().getTime() + "-" + session + "-" + Math.random();
432 seen[make_seen_key(message.ID, message.Text)] = message;
433 var path = "/speak" +
434 "?id=" + encodeURIComponent(message.ID) +
435 "&text=" + encodeURIComponent(message.Text);
436 for (var i in servers) {
437 var uri = rcserverbase(servers[i]) + path;
438 var img = document.createElement("img");
439 img.setAttribute("src", uri);
440 d.appendChild(img);
441 }
442 }
443
444 function rcinput(input) {
445 var message;
446 var re = /^\/(\S+)(\s(.*))?/
447 var match = re.exec(input);
448 if (match) {
449 var command = match[1];
450 var rest = match[3];
451 if (command == 'me') {
452 message = "* " + rcnick() + " " + rest;
453 } else if (command == 'nick') {
454 message = "*** " + rcnick() + " is now known as " + rest;
455 rcsetnick(rest);
456 } else {
457 rcaddmessagetoUI({'Text': '-!- No such command: ' + command, 'ServerTimes': {}});
458 return;
459 }
460 } else {
461 message = "<" + rcnick() + "> " + input;
462 }
463
464 var m = {'Text': message, 'ServerTimes': {}};
465 rcaddmessagetohistory(m);
466 rcsend(m.UI, m);
467 }
468
469 function rckeydown(event) {
470 if (event.keyCode == 13) {
471 rcinput(document.input.say.value);
472 document.input.say.value = "";
473 return false;
474 }
475 }
476
477 // From http://www.alistapart.com/articles/expanding-text-areas-made-elegant/
478 function makeExpandingArea(container) {
479 var area = container.querySelector('textarea');
480 var span1 = container.querySelector('span');
481 var span2 = document.getElementById('historypad');
482 if (area.addEventListener) {
483 area.addEventListener('input', function() {
484 span1.textContent = area.value;
485 span2.textContent = area.value;
486 }, false);
487 span1.textContent = area.value;
488 span2.textContent = area.value;
489 } else if (area.attachEvent) {
490 // IE8 compatibility
491 area.attachEvent('onpropertychange', function() {
492 span1.innerText = area.value;
493 span2.innerText = area.value;
494 });
495 span1.innerText = area.value;
496 span2.innerText = area.value;
497 }
498 }
499 //--><!]]></script>
500
501</head>
502
503<body onload="rcconnect()">
504 <div id="container">
505 <div class="banner">(You are using <a href="https://github.com/chkno/reliable-chat">Reliable Chat</a>)</div>
506 <div id="history"></div>
507 <div class="expandingArea" style="visibility: hidden">
508 <pre><span id="historypad"></span><br></pre>
509 </div>
510 <div id="client">
511 <div id="input">
512 <form name="input" onsubmit="return false" autocomplete="off">
513 <div id="expando" class="expandingArea">
514 <pre><span></span><br></pre>
515 <textarea id="say" onkeydown="return rckeydown(event)" autofocus="autofocus"></textarea>
516 </div>
517 </form></div>
518 <div id="status"></div>
519 </div>
520 </div>
521</body>
522</html>