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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: 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 .banner {
63 font-size: 85%;
64 text-align: right;
65 }
66 .servercount {
67 margin-right: 0.5em;
68 font-size: 70%;
69 }
70 .timestamp {
71 margin-right: 0.8em;
72 }
73 .timestamp:hover, .timestamp:hover .servertimestamps {
74 background-color: #556;
75 }
76 .timestamp:hover .servertimestamps {
77 display: block;
78 }
79 .servertimestamps {
80 display: none;
81 position: absolute;
82 left: 3em;
83 z-index: 1;
84 border: 1px solid black;
85 border-radius: 5px;
86 padding-left: 5px;
87 padding-right: 5px;
88 }
89 img { width: 1px; height: 1px; }
90 iframe { display: none }
91 #status span { margin-right: 10px; }
92 #status span.sad {
93 background-color: #f00;
94 color: #fff;
95 border: 1px solid black;
96 border-radius: 5px;
97 padding-left: 5px;
98 padding-right: 5px;
99 }
100 #status span.happy {
101 background-color: #0f0;
102 color: #000;
103 border: 1px solid black;
104 border-radius: 5px;
105 padding-left: 5px;
106 padding-right: 5px;
107 }
108 /*]]>*/--></style>
109 <script type="text/javascript"><!--//--><![CDATA[//><!--
110 var servers = ['chkno.net', 'rc2.chkno.net', 'echto.net', 'the-wes.com', 'vibrantlogic.com'];
111
112 var session = Math.random(); // For outgoing message IDs
113 var since = {}; // server -> time: For fetch?since=
114 var seen = {}; // seen_key -> message
115 var history = []; // List of messages sorted by Time
116 // Messages have these fields:
117 // Time: The timestamp. Median of ServerTimes
118 // ID: Some unique string for deduping
119 // Text: The text of the message
120 // ServerTimes: server -> timestamp
121 // UI: The DOM node for this message in the UI
122
123 function rcnick() {
124 var nick = localStorage.getItem("nick");
125 if (nick) {
126 return nick;
127 }
128 return 'anonymous';
129 }
130
131 function rcsetnick(new_nick) {
132 localStorage.setItem("nick", new_nick);
133 }
134
135 function rcserverbase(server) {
136 // Add the default port if server doesn't contain a port number already
137 if (server.indexOf(":") == -1) {
138 return "http://" + server + ":21059";
139 } else {
140 return "http://" + server;
141 }
142 }
143
144 function rcchangeserverstatus(server, new_status) {
145 var statusbar = document.getElementById("status");
146 var spans = statusbar.getElementsByTagName("span");
147 for (var i in spans) {
148 if (spans[i].firstChild && 'data' in spans[i].firstChild && spans[i].firstChild.data == server) {
149 spans[i].setAttribute("class", new_status);
150 }
151 }
152 }
153
154 function rcpad2(x) {
155 return (x < 10 ? "0" : "") + x;
156 }
157 function rcpad3(x) {
158 return (x < 10 ? "00" : (x < 100 ? "0" : "")) + x;
159 }
160
161 function rcformattime(t) {
162 var d = t.getDay();
163 d = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][d];
164 var h = t.getHours();
165 var m = t.getMinutes();
166 var s = t.getSeconds();
167 return d + " " + rcpad2(h) + ":" + rcpad2(m) + ":" + rcpad2(s);
168 }
169
170 function rcaddservertimestamptohover(message, server) {
171 var divs = message.UI.getElementsByTagName("div");
172 var t = message.ServerTimes[server];
173 for (var i in divs) {
174 if (divs[i].getAttribute && divs[i].getAttribute("class") == "servertimestamps") {
175 var d = document.createElement("div");
176 var text = t.getFullYear() + "-" +
177 rcpad2(t.getMonth()) + "-" +
178 rcpad2(t.getDay()) + " " +
179 rcformattime(t) + "." +
180 rcpad3(t.getMilliseconds()) + " " +
181 server;
182 d.appendChild(document.createTextNode(text));
183 divs[i].appendChild(d);
184 }
185 }
186 }
187
188 function rcmakemessageUI(message) {
189 message.UI = document.createElement("div");
190
191 // Server count
192 var servercount = document.createElement("span");
193 servercount.setAttribute("class", "servercount");
194 servercount.appendChild(document.createTextNode(Object.keys(message.ServerTimes).length));
195 message.UI.appendChild(servercount);
196
197 // Timestamp
198 var timestamp_text = message.Time ? rcformattime(message.Time) : "";
199 var timestamp = document.createElement("span");
200 timestamp.setAttribute("class", "timestamp");
201 timestamp.appendChild(document.createTextNode(timestamp_text));
202 message.UI.appendChild(timestamp);
203
204 // Timestamp hover
205 var timestamp_hover = document.createElement("div");
206 timestamp_hover.setAttribute("class", "servertimestamps");
207 timestamp.appendChild(timestamp_hover);
208 for (var server in message.ServerTimes) {
209 rcaddservertimestamptohover(message, server);
210 }
211
212 // Classify different message types
213 var text_span = document.createElement("span");
214 var type;
215 if (/^\*\*\* /.test(message.Text)) {
216 type = "status";
217 } else if (/^\* /.test(message.Text)) {
218 type = "me";
219 } else {
220 type = "text";
221 }
222 if (Object.keys(message.ServerTimes).length == 0) {
223 type += " self";
224 }
225 text_span.setAttribute("class", type);
226
227 // URL detection
228 var text = message.Text;
229 var URL_re = /\bhttps?:\/\/\S+/;
230 while (URL_re.test(text)) {
231 var match = URL_re.exec(text);
232 var leading_text = text.substr(0, match.index);
233 if (leading_text) {
234 text_span.appendChild(document.createTextNode(leading_text));
235 }
236 var anchor = document.createElement("a");
237 anchor.setAttribute("rel", "nofollow");
238 anchor.setAttribute("href", encodeURI(match[0]));
239 anchor.appendChild(document.createTextNode(match[0]));
240 text_span.appendChild(anchor);
241 text = text.substr(match.index + match[0].length);
242 }
243 if (text) {
244 text_span.appendChild(document.createTextNode(text));
245 }
246
247 message.UI.appendChild(text_span);
248 }
249
250 function rcaddmessagetohistory(message) {
251 var message_i;
252 if (message.Time) {
253 for (var i = history.length - 1; ; i--) {
254 if (i < 0 || (history[i].Time && message.Time >= history[i].Time)) {
255 message_i = i+1;
256 history.splice(message_i, 0, message);
257 break;
258 }
259 }
260 } else {
261 history.push(message);
262 message_i = history.length-1;
263 }
264
265 if (!message.UI) {
266 rcmakemessageUI(message);
267 }
268 var h = document.getElementById("history");
269 if (message_i + 1 < history.length) {
270 h.insertBefore(message.UI, history[message_i + 1].UI);
271 } else {
272 h.appendChild(message.UI);
273 }
274 window.scrollTo(0, document.body.scrollHeight);
275 }
276
277 function make_seen_key(id, text) {
278 return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
279 }
280
281 function rcupdatemessagetime(message) {
282 // Set message.Time to be the median of message.ServerTimes
283 var times = [];
284 for (var i in message.ServerTimes) {
285 times.push(message.ServerTimes[i]);
286 }
287 times.sort();
288 if (times.length % 2) {
289 message.Time = times[(times.length-1)/2];
290 } else {
291 var middle = times.length/2;
292 var difference = times[middle].getTime() - times[middle-1].getTime();
293 message.Time = new Date(times[middle-1].getTime() + difference/2);
294 }
295
296 // This may have broken history's in-sorted-order invariant
297 var hi = history.indexOf(message);
298 if ((history[hi-1] && history[hi-1].Time > message.Time) ||
299 (history[hi+1] && history[hi+1].Time < message.Time)) {
300 history.splice(hi,1);
301 rcaddmessagetohistory(message);
302 }
303
304 // Update the UI
305 var spans = message.UI.getElementsByTagName("span");
306 for (var i in spans) {
307 if (spans[i].getAttribute) {
308 var type = spans[i].getAttribute("class");
309 if (type == "servercount") {
310 spans[i].firstChild.data = Object.keys(message.ServerTimes).length;
311 } else if (type == "timestamp") {
312 spans[i].firstChild.data = rcformattime(message.Time);
313 }
314 }
315 }
316 }
317
318 function rcreceivemessages(server, messages) {
319 for (var i in messages) {
320 var m = messages[i];
321 m.Time = new Date(m.Time);
322 var seen_key = make_seen_key(m.ID, m.Text);
323 if (seen_key in seen) {
324 seen[seen_key].ServerTimes[server] = m.Time;
325 rcupdatemessagetime(seen[seen_key]);
326 rcaddservertimestamptohover(seen[seen_key], server);
327 } else {
328 m.ServerTimes = {};
329 m.ServerTimes[server] = m.Time;
330 seen[seen_key] = m;
331 rcaddmessagetohistory(m);
332 for (var i in servers) {
333 rcchangeserverstatus(servers[i], "sad");
334 }
335 }
336 rcchangeserverstatus(server, "happy");
337 }
338 }
339
340 function rcfetch(server) {
341 var delay = 10000; // TODO: Exponential backoff
342 var xhr = new XMLHttpRequest();
343 xhr.onreadystatechange = function() {
344 if (this.readyState == this.DONE) {
345 if (this.status == 200) {
346 var rtxt = this.responseText;
347 if (rtxt != null) {
348 var messages = JSON.parse(rtxt);
349 if (messages != null) {
350 delay = 40;
351 if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
352 since[server] = messages[messages.length-1].Time;
353 }
354 rcreceivemessages(server, messages);
355 }
356 }
357 }
358 window.setTimeout(rcfetch, delay, server);
359 }
360 }
361 var uri = rcserverbase(server) + "/fetch";
362 if (server in since) {
363 uri += '?since="' + since[server] + '"';
364 }
365 xhr.open("GET", uri);
366 xhr.send();
367 }
368
369 function rcconnect() {
370 for (var i in servers) {
371 rcfetch(servers[i]);
372 // Status bar entry
373 var status_indicator = document.createElement("span");
374 status_indicator.appendChild(document.createTextNode(servers[i]));
375 status_indicator.setAttribute("class", "sad");
376 document.getElementById("status").appendChild(status_indicator);
377 }
378 }
379
380 function rcsend(d, message) {
381 message.ID = new Date().getTime() + "-" + session + "-" + Math.random();
382 seen[make_seen_key(message.ID, message.Text)] = message;
383 var path = "/speak" +
384 "?id=" + encodeURIComponent(message.ID) +
385 "&text=" + encodeURIComponent(message.Text);
386 for (var i in servers) {
387 var uri = rcserverbase(servers[i]) + path;
388 var img = document.createElement("img");
389 img.setAttribute("src", uri);
390 d.appendChild(img);
391 }
392 }
393
394 function rcinput(input) {
395 var message;
396 var re = /^\/([a-z]+) (.*)/
397 var match = re.exec(input);
398 if (match && match[1] == 'me') {
399 message = "* " + rcnick() + " " + match[2];
400 } else if (match && match[1] == 'nick') {
401 message = "*** " + rcnick() + " is now known as " + match[2];
402 rcsetnick(match[2]);
403 } else {
404 message = "<" + rcnick() + "> " + input;
405 }
406
407 var m = {'Text': message, 'ServerTimes': {}};
408 rcaddmessagetohistory(m);
409 rcsend(m.UI, m);
410 }
411
412 function rckeydown(event) {
413 if (event.keyCode == 13) {
414 rcinput(document.input.say.value);
415 document.input.say.value = "";
416
417 }
418 }
419 //--><!]]></script>
420
421</head>
422
423<body onload="rcconnect()">
424 <div id="container">
425 <div class="banner">(You are using <a href="https://github.com/chkno/reliable-chat">Reliable Chat</a>)</div>
426 <div id="history"></div>
427 <div id="client">
428 <div id="input">
429 <form name="input" onsubmit="return false" autocomplete="off">
430 <input id="say" onkeydown="return rckeydown(event)" autocomplete="off" autofocus="autofocus"></input>
431 </form></div>
432 <div id="status">&nbsp;</div>
433 </div>
434 </div>
435</body>
436</html>