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