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827f21bb SW |
1 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" |
2 | "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> | |
827f21bb | 3 | <html xmlns="http://www.w3.org/1999/xhtml"> |
520c21fd SW |
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 | --> | |
827f21bb SW |
22 | <head> |
23 | <title>Reliable Chat</title> | |
0248a518 | 24 | <style type="text/css"><!--/*--><![CDATA[/*><!--*/ |
70f46223 JH |
25 | html, body { |
26 | width: 99.9%; | |
27 | height: 100%; | |
28 | margin: 0; | |
29 | padding: 0; | |
b22a2ced JH |
30 | background-color: #293134; |
31 | color: silver; | |
70f46223 JH |
32 | font-family: monospace; |
33 | } | |
34 | #container { | |
35 | height: 100%; | |
36 | } | |
37 | #status { | |
38 | width: 100%; | |
638866e9 | 39 | text-align: right; |
b22a2ced | 40 | background-color: #293134; |
70f46223 JH |
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%; | |
b22a2ced | 52 | background-color: #293134; |
70f46223 | 53 | } |
0248a518 | 54 | #say { width: 100% } |
70f46223 JH |
55 | #history { |
56 | padding: 0px 5px 55px 5px; | |
57 | vertical-align: bottom | |
58 | } | |
4b184c5f SW |
59 | .timestamp { |
60 | margin-right: 0.8em; | |
61 | } | |
0248a518 SW |
62 | img { width: 1px; height: 1px; } |
63 | iframe { display: none } | |
70f46223 | 64 | #status span { margin-right: 10px; } |
f09c4ede JH |
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 | } | |
0248a518 SW |
81 | /*]]>*/--></style> |
82 | <script type="text/javascript"><!--//--><![CDATA[//><!-- | |
83 | var servers = ['chkno.net', 'rc2.chkno.net', 'echto.net', 'the-wes.com', 'vibrantlogic.com']; | |
84 | ||
da9ce2ab | 85 | var session = Math.random(); // For outgoing message IDs |
869430fa SW |
86 | var since = {}; // server -> time: For fetch?since= |
87 | var seen = {}; // seen_key -> message | |
7f54ca0a | 88 | var history = []; // List of messages sorted by Time |
5419ea4c | 89 | // Messages have these fields: |
40380bd3 | 90 | // Time: The timestamp. Median of ServerTimes |
5419ea4c SW |
91 | // ID: Some unique string for deduping |
92 | // Text: The text of the message | |
705e26cf | 93 | // ServerTimes: server -> timestamp |
5419ea4c | 94 | // UI: The DOM node for this message in the UI |
0248a518 SW |
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 | ||
bd1ed9dd SW |
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 | ||
0248a518 | 139 | function rcaddmessagetohistory(message) { |
7f54ca0a SW |
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 | ||
95ba71ee | 154 | if (!message.UI) { |
4b184c5f SW |
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)); | |
95ba71ee | 159 | message.UI = document.createElement("div"); |
4b184c5f SW |
160 | message.UI.appendChild(timestamp); |
161 | message.UI.appendChild(document.createTextNode(message.Text)); | |
95ba71ee | 162 | } |
0248a518 | 163 | var h = document.getElementById("history"); |
7f54ca0a SW |
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 | } | |
0248a518 | 169 | window.scrollTo(0, document.body.scrollHeight); |
0248a518 SW |
170 | } |
171 | ||
172 | function make_seen_key(id, text) { | |
173 | return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@"); | |
174 | } | |
175 | ||
40380bd3 SW |
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(); | |
40380bd3 | 183 | if (times.length % 2) { |
ac4bf273 | 184 | message.Time = times[(times.length-1)/2]; |
40380bd3 | 185 | } else { |
ac4bf273 | 186 | var middle = times.length/2; |
40380bd3 SW |
187 | var difference = times[middle].getTime() - times[middle-1].getTime(); |
188 | message.Time = new Date(times[middle-1].getTime() + difference/2); | |
189 | } | |
95ba71ee SW |
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 | } | |
5be4c8ec SW |
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 | } | |
40380bd3 SW |
206 | } |
207 | ||
79ced6f1 SW |
208 | function rcreceivemessages(server, messages) { |
209 | for (var i in messages) { | |
ad35b1be | 210 | var m = messages[i]; |
bd1ed9dd | 211 | m.Time = new Date(m.Time); |
ad35b1be | 212 | var seen_key = make_seen_key(m.ID, m.Text); |
705e26cf SW |
213 | if (seen_key in seen) { |
214 | seen[seen_key].ServerTimes[server] = m.Time; | |
40380bd3 | 215 | rcupdatemessagetime(seen[seen_key]); |
705e26cf | 216 | } else { |
16640c5d SW |
217 | m.ServerTimes = {}; |
218 | m.ServerTimes[server] = m.Time; | |
869430fa | 219 | seen[seen_key] = m; |
ad35b1be | 220 | rcaddmessagetohistory(m); |
79ced6f1 SW |
221 | for (var i in servers) { |
222 | rcchangeserverstatus(servers[i], "sad"); | |
223 | } | |
0248a518 | 224 | } |
79ced6f1 | 225 | rcchangeserverstatus(server, "happy"); |
0248a518 | 226 | } |
0248a518 SW |
227 | } |
228 | ||
79ced6f1 SW |
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) { | |
79ced6f1 SW |
239 | delay = 40; |
240 | if (messages.length >= 1 && "Time" in messages[messages.length-1]) { | |
ad35b1be | 241 | since[server] = messages[messages.length-1].Time; |
79ced6f1 | 242 | } |
92ca5f8a | 243 | rcreceivemessages(server, messages); |
79ced6f1 | 244 | } |
0248a518 SW |
245 | } |
246 | } | |
79ced6f1 | 247 | window.setTimeout(rcfetch, delay, server); |
0248a518 SW |
248 | } |
249 | } | |
79ced6f1 SW |
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(); | |
0248a518 SW |
256 | } |
257 | ||
258 | function rcconnect() { | |
0248a518 | 259 | for (var i in servers) { |
79ced6f1 | 260 | rcfetch(servers[i]); |
0248a518 SW |
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 | } | |
0248a518 SW |
267 | } |
268 | ||
269 | function rcsend(d, message) { | |
7f54ca0a SW |
270 | message.ID = new Date().getTime() + "-" + session + "-" + Math.random(); |
271 | seen[make_seen_key(message.ID, message.Text)] = message; | |
0248a518 | 272 | var path = "/speak" + |
7f54ca0a SW |
273 | "?id=" + encodeURIComponent(message.ID) + |
274 | "&text=" + encodeURIComponent(message.Text); | |
0248a518 SW |
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 | ||
5a6c082a SW |
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 | ||
7f54ca0a | 296 | var m = {'Text': message, 'ServerTimes': {}}; |
869430fa SW |
297 | rcaddmessagetohistory(m); |
298 | rcsend(m.UI, m); | |
5a6c082a SW |
299 | } |
300 | ||
0248a518 SW |
301 | function rckeydown(event) { |
302 | if (event.keyCode == 13) { | |
5a6c082a | 303 | rcinput(document.input.say.value); |
0248a518 SW |
304 | document.input.say.value = ""; |
305 | ||
0248a518 SW |
306 | } |
307 | } | |
308 | //--><!]]></script> | |
309 | ||
827f21bb SW |
310 | </head> |
311 | ||
f0e385c7 | 312 | <body onload="rcconnect()"> |
70f46223 JH |
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"> </div> | |
321 | </div> | |
322 | </div> | |
827f21bb SW |
323 | </body> |
324 | </html> |