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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 .status {
65 color: #dd8;
66 }
67 .local.self {
68 color: #d8d;
69 }
70 .self {
71 color: #8d8;
72 }
73 .me {
74 color: #bbd;
75 }
76 .servercount {
77 margin-right: -0.5em;
78 font-size: 70%;
79 }
80 .timestamp:hover, .timestamp:hover .servertimestamps {
81 background-color: #556;
82 }
83 .timestamp:hover .servertimestamps {
84 display: block;
85 }
86 .servertimestamps {
87 display: none;
88 position: absolute;
89 left: 3em;
90 z-index: 1;
91 border: 1px solid black;
92 border-radius: 5px;
93 padding-left: 5px;
94 padding-right: 5px;
95 }
96 img { width: 1px; height: 1px; }
97 iframe { display: none }
98 #status span { margin-right: 10px; }
99 #status span.sad {
100 background-color: #f00;
101 color: #fff;
102 border: 1px solid black;
103 border-radius: 5px;
104 padding-left: 5px;
105 padding-right: 5px;
106 }
107 #status span.happy {
108 background-color: #0f0;
109 color: #000;
110 border: 1px solid black;
111 border-radius: 5px;
112 padding-left: 5px;
113 padding-right: 5px;
114 }
115
116 /* BEGIN expando input box trick kindly provided by http://www.alistapart.com/articles/expanding-text-areas-made-elegant/ */
117 .expandingArea {
118 position: relative;
119 border: 1px solid #888;
120 background: silver;
121 }
122 .expandingArea > textarea,
123 .expandingArea > pre {
124 margin: 0;
125 outline: 0;
126 border: 0;
127 padding: 5px;
128 background: transparent;
129 font: 400 13px/16px helvetica, arial, sans-serif;
130 /* Make the text soft-wrap */
131 white-space: pre-wrap;
132 word-wrap: break-word;
133 }
134 .expandingArea > textarea {
135 /* The border-box box model is used to allow
136 * padding whilst still keeping the overall width
137 * at exactly that of the containing element.
138 */
139 -webkit-box-sizing: border-box;
140 -moz-box-sizing: border-box;
141 -ms-box-sizing: border-box;
142 box-sizing: border-box;
143 width: 100%;
144 /* Hide any scrollbars */
145 overflow: hidden;
146 position: absolute;
147 top: 0;
148 left: 0;
149 height: 100%;
150 /* Remove WebKit user-resize widget */
151 resize: none;
152 }
153 .expandingArea > pre {
154 display: block;
155 /* Hide the text; just using it for sizing */
156 visibility: hidden;
157 }
158 /* END expando input box trick kindly provided by http://www.alistapart.com/articles/expanding-text-areas-made-elegant/ */
159
160 /*]]>*/--></style>
161 <script type="text/javascript"><!--//--><![CDATA[//><!--
162 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'];
163
164 var session = Math.random(); // For outgoing message IDs
165 var since = {}; // server -> time: For fetch?since=
166 var seen = {}; // seen_key -> message
167 var history = []; // List of messages sorted by Time
168 // Messages have these fields:
169 // Time: The timestamp. Median of ServerTimes
170 // ID: Some unique string for deduping
171 // Text: The text of the message
172 // ServerTimes: server -> timestamp
173 // UI: The DOM node for this message in the UI
174
175 function rcnick() {
176 var nick = localStorage.getItem("nick");
177 if (nick) {
178 return nick;
179 }
180 return 'anonymous';
181 }
182
183 function rcsetnick(new_nick) {
184 localStorage.setItem("nick", new_nick);
185 }
186
187 function rcserverbase(server) {
188 // Add the default port if server doesn't contain a port number already
189 if (server.indexOf(":") == -1) {
190 return "http://" + server + ":21059";
191 } else {
192 return "http://" + server;
193 }
194 }
195
196 function rcchangeserverstatus(server, new_status) {
197 var statusbar = document.getElementById("status");
198 var spans = statusbar.getElementsByTagName("span");
199 for (var i in spans) {
200 if (spans[i].firstChild && 'data' in spans[i].firstChild && spans[i].firstChild.data == server) {
201 spans[i].setAttribute("class", new_status);
202 }
203 }
204 }
205
206 function rcpad2(x) {
207 return (x < 10 ? "0" : "") + x;
208 }
209 function rcpad3(x) {
210 return (x < 10 ? "00" : (x < 100 ? "0" : "")) + x;
211 }
212
213 function rcformattime(t) {
214 var d = t.getDay();
215 d = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][d];
216 var h = t.getHours();
217 var m = t.getMinutes();
218 var s = t.getSeconds();
219 return d + " " + rcpad2(h) + ":" + rcpad2(m) + ":" + rcpad2(s);
220 }
221
222 function rcaddservertimestamptohover(message, server) {
223 var divs = message.UI.getElementsByTagName("div");
224 var t = message.ServerTimes[server];
225 for (var i in divs) {
226 if (divs[i].getAttribute && divs[i].getAttribute("class") == "servertimestamps") {
227 var d = document.createElement("div");
228 var text = t.getFullYear() + "-" +
229 rcpad2(t.getMonth()) + "-" +
230 rcpad2(t.getDay()) + " " +
231 rcformattime(t) + "." +
232 rcpad3(t.getMilliseconds()) + " " +
233 server;
234 d.appendChild(document.createTextNode(text));
235 divs[i].appendChild(d);
236 }
237 }
238 }
239
240 function rcmakemessageUI(message) {
241 message.UI = document.createElement("div");
242
243 // Server count
244 var servercount = document.createElement("span");
245 servercount.setAttribute("class", "servercount");
246 servercount.appendChild(document.createTextNode(Object.keys(message.ServerTimes).length));
247 message.UI.appendChild(servercount);
248 message.UI.appendChild(document.createTextNode(" "));
249
250 // Timestamp
251 var timestamp_text = message.Time ? rcformattime(message.Time) : "";
252 var timestamp = document.createElement("span");
253 timestamp.setAttribute("class", "timestamp");
254 timestamp.appendChild(document.createTextNode(timestamp_text));
255 message.UI.appendChild(timestamp);
256 message.UI.appendChild(document.createTextNode(" "));
257
258 // Timestamp hover
259 var timestamp_hover = document.createElement("div");
260 timestamp_hover.setAttribute("class", "servertimestamps");
261 timestamp.appendChild(timestamp_hover);
262 for (var server in message.ServerTimes) {
263 rcaddservertimestamptohover(message, server);
264 }
265
266 // Classify different message types
267 var text_span = document.createElement("span");
268 var type;
269 if (/^\*\*\* /.test(message.Text)) {
270 type = "status";
271 } else if (/^\* /.test(message.Text)) {
272 type = "me";
273 } else if (/^-!- /.test(message.Text)) {
274 type = "local";
275 } else {
276 type = "text";
277 }
278 if (Object.keys(message.ServerTimes).length == 0) {
279 type += " self";
280 }
281 text_span.setAttribute("class", type);
282
283 // URL detection
284 var text = message.Text;
285 var URL_re = /\bhttps?:\/\/\S+/;
286 while (URL_re.test(text)) {
287 var match = URL_re.exec(text);
288 var leading_text = text.substr(0, match.index);
289 if (leading_text) {
290 text_span.appendChild(document.createTextNode(leading_text));
291 }
292 var anchor = document.createElement("a");
293 anchor.setAttribute("rel", "nofollow");
294 anchor.setAttribute("href", encodeURI(match[0]));
295 anchor.appendChild(document.createTextNode(match[0]));
296 text_span.appendChild(anchor);
297 text = text.substr(match.index + match[0].length);
298 }
299 if (text) {
300 text_span.appendChild(document.createTextNode(text));
301 }
302
303 message.UI.appendChild(text_span);
304 }
305
306 function rcaddmessagetohistory(message) {
307 var message_i;
308 if (message.Time) {
309 for (var i = history.length - 1; ; i--) {
310 if (i < 0 || (history[i].Time && message.Time >= history[i].Time)) {
311 message_i = i+1;
312 history.splice(message_i, 0, message);
313 break;
314 }
315 }
316 } else {
317 history.push(message);
318 message_i = history.length-1;
319 }
320 if (message_i + 1 < history.length) {
321 rcaddmessagetoUI(message, history[message_i + 1].UI);
322 } else {
323 rcaddmessagetoUI(message, null);
324 }
325 }
326
327 function rcaddmessagetoUI(message, before) {
328 if (!message.UI) {
329 rcmakemessageUI(message);
330 }
331 var h = document.getElementById("history");
332 if (before) {
333 h.insertBefore(message.UI, before);
334 } else {
335 h.appendChild(message.UI);
336 }
337 window.scrollTo(0, document.body.scrollHeight);
338 }
339
340 function make_seen_key(id, text) {
341 return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
342 }
343
344 function rcupdatemessagetime(message) {
345 // Set message.Time to be the median of message.ServerTimes
346 var times = [];
347 for (var i in message.ServerTimes) {
348 times.push(message.ServerTimes[i]);
349 }
350 times.sort();
351 if (times.length % 2) {
352 message.Time = times[(times.length-1)/2];
353 } else {
354 var middle = times.length/2;
355 var difference = times[middle].getTime() - times[middle-1].getTime();
356 message.Time = new Date(times[middle-1].getTime() + difference/2);
357 }
358
359 // This may have broken history's in-sorted-order invariant
360 var hi = history.indexOf(message);
361 if ((history[hi-1] && history[hi-1].Time > message.Time) ||
362 (history[hi+1] && history[hi+1].Time < message.Time)) {
363 history.splice(hi,1);
364 rcaddmessagetohistory(message);
365 }
366
367 // Update the UI
368 var spans = message.UI.getElementsByTagName("span");
369 for (var i in spans) {
370 if (spans[i].getAttribute) {
371 var type = spans[i].getAttribute("class");
372 if (type == "servercount") {
373 spans[i].firstChild.data = Object.keys(message.ServerTimes).length;
374 } else if (type == "timestamp") {
375 spans[i].firstChild.data = rcformattime(message.Time);
376 }
377 }
378 }
379 }
380
381 function rcreceivemessages(server, messages) {
382 for (var i in messages) {
383 var m = messages[i];
384 m.Time = new Date(m.Time);
385 var seen_key = make_seen_key(m.ID, m.Text);
386 if (seen_key in seen) {
387 seen[seen_key].ServerTimes[server] = m.Time;
388 rcupdatemessagetime(seen[seen_key]);
389 rcaddservertimestamptohover(seen[seen_key], server);
390 } else {
391 m.ServerTimes = {};
392 m.ServerTimes[server] = m.Time;
393 seen[seen_key] = m;
394 rcaddmessagetohistory(m);
395 for (var i in servers) {
396 rcchangeserverstatus(servers[i], "sad");
397 }
398 }
399 rcchangeserverstatus(server, "happy");
400 }
401 }
402
403 function rcfetch(server) {
404 var delay = 10000; // TODO: Exponential backoff
405 var xhr = new XMLHttpRequest();
406 xhr.onreadystatechange = function() {
407 if (this.readyState == this.DONE) {
408 if (this.status == 200) {
409 var rtxt = this.responseText;
410 if (rtxt != null) {
411 var messages = JSON.parse(rtxt);
412 if (messages != null) {
413 delay = 40;
414 if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
415 since[server] = messages[messages.length-1].Time;
416 }
417 rcreceivemessages(server, messages);
418 }
419 }
420 }
421 window.setTimeout(rcfetch, delay, server);
422 }
423 }
424 var uri = rcserverbase(server) + "/fetch";
425 if (server in since) {
426 uri += '?since="' + since[server] + '"';
427 }
428 xhr.open("GET", uri);
429 xhr.send();
430 }
431
432 function rcconnect() {
433 makeExpandingArea(document.getElementById("expando"));
434 for (var i in servers) {
435 rcfetch(servers[i]);
436 // Status bar entry
437 var status_indicator = document.createElement("span");
438 status_indicator.appendChild(document.createTextNode(servers[i]));
439 status_indicator.setAttribute("class", "sad");
440 document.getElementById("status").appendChild(status_indicator);
441 }
442 }
443
444 function rcsend(d, message) {
445 message.ID = new Date().getTime() + "-" + session + "-" + Math.random();
446 seen[make_seen_key(message.ID, message.Text)] = message;
447 var path = "/speak" +
448 "?id=" + encodeURIComponent(message.ID) +
449 "&text=" + encodeURIComponent(message.Text);
450 for (var i in servers) {
451 var xhr = new XMLHttpRequest();
452 xhr.open("POST", rcserverbase(servers[i]) + path);
453 xhr.send();
454 }
455 }
456
457 function rcinput(input) {
458 var message;
459 var re = /^\/(\S+)(\s(.*))?/;
460 var match = re.exec(input);
461 if (match) {
462 var command = match[1];
463 var rest = match[3];
464 if (command == 'me') {
465 message = "* " + rcnick() + " " + rest;
466 } else if (command == 'nick') {
467 if (rcnick() == rest) {
468 rcaddmessagetoUI({'Text': '-!- Your nick is already ' + rcnick(), 'ServerTimes': {}});
469 return;
470 }
471 message = "*** " + rcnick() + " is now known as " + rest;
472 rcsetnick(rest);
473 } else {
474 rcaddmessagetoUI({'Text': '-!- No such command: ' + command, 'ServerTimes': {}});
475 return;
476 }
477 } else {
478 message = "<" + rcnick() + "> " + input;
479 }
480
481 var m = {'Text': message, 'ServerTimes': {}};
482 rcaddmessagetohistory(m);
483 rcsend(m.UI, m);
484 }
485
486 function rckeydown(event) {
487 if (event.keyCode == 13) {
488 if (document.input.say.value) {
489 rcinput(document.input.say.value);
490 }
491 document.input.say.value = "";
492 return false;
493 }
494 }
495
496 // From http://www.alistapart.com/articles/expanding-text-areas-made-elegant/
497 function makeExpandingArea(container) {
498 var area = container.querySelector('textarea');
499 var span1 = container.querySelector('span');
500 var span2 = document.getElementById('historypad');
501 if (area.addEventListener) {
502 area.addEventListener('input', function() {
503 span1.textContent = area.value;
504 span2.textContent = area.value;
505 }, false);
506 span1.textContent = area.value;
507 span2.textContent = area.value;
508 } else if (area.attachEvent) {
509 // IE8 compatibility
510 area.attachEvent('onpropertychange', function() {
511 span1.innerText = area.value;
512 span2.innerText = area.value;
513 });
514 span1.innerText = area.value;
515 span2.innerText = area.value;
516 }
517 }
518 //--><!]]></script>
519
520 </head>
521
522 <body onload="rcconnect()">
523 <div id="container">
524 <div class="banner">(You are using <a href="https://github.com/chkno/reliable-chat">Reliable Chat</a>)</div>
525 <div id="history"></div>
526 <div class="expandingArea" style="visibility: hidden">
527 <pre><span id="historypad"></span><br></pre>
528 </div>
529 <div id="client">
530 <div id="input">
531 <form name="input" onsubmit="return false" autocomplete="off">
532 <div id="expando" class="expandingArea">
533 <pre><span></span><br></pre>
534 <textarea id="say" onkeydown="return rckeydown(event)" autofocus="autofocus"></textarea>
535 </div>
536 </form></div>
537 <div id="status"></div>
538 </div>
539 </div>
540 </body>
541 </html>