[reliable-chat] / webclient / rc.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
  "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<!--
 reliable-chat - multipath chat
 Copyright (C) 2012  Scott Worley <sworley@chkno.net>
 Copyright (C) 2012  Jason Hibbs <skitch@gmail.com>

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU Affero General Public License as
 published by the Free Software Foundation, either version 3 of the
 License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU Affero General Public License for more details.

 You should have received a copy of the GNU Affero General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
-->
<head>
 <title>Reliable Chat</title>
  <style type="text/css"><!--/*--><![CDATA[/*><!--*/
	html, body {
		width: 99.9%;
		height: 100%;
		margin: 0;
		padding: 0;
		background-color: #293134;
		color: silver;
		font-family: monospace;
	}
	#container {
		height: 100%;
	}
	#status {
		width: 100%;
		text-align: right;
		background-color: #293134;
		padding: 5px 5px 5px 0px;
	}
	#client {
		width: 98.5%;
		padding: 0px 0px 0px 5px;
		height: 50px;
		position: fixed;
		bottom: 0;
	}
	#input {
		width: 100%;
		background-color: #293134;
	}
	#say { width: 100% }
	#history {
		padding: 0px 5px 55px 5px;
		vertical-align: bottom
	}
	.servercount {
		margin-right: 0.5em;
		font-size: 70%;
	}
	.timestamp {
		margin-right: 0.8em;
	}
	img { width: 1px; height: 1px; }
	iframe { display: none }
	#status span { margin-right: 10px; }
	#status span.sad {
		background-color: #f00;
		color: #fff;
		border: 1px solid black;
		border-radius: 5px;
		padding-left: 5px;
		padding-right: 5px;
	}
	#status span.happy {
		background-color: #0f0;
		color: #000;
		border: 1px solid black;
		border-radius: 5px;
		padding-left: 5px;
		padding-right: 5px;
	}
  /*]]>*/--></style>
  <script type="text/javascript"><!--//--><![CDATA[//><!--
	var servers = ['chkno.net', 'rc2.chkno.net', 'echto.net', 'the-wes.com', 'vibrantlogic.com'];

	var session = Math.random();  // For outgoing message IDs
	var since = {};    // server -> time: For fetch?since=
	var seen = {};     // seen_key -> message
	var history = [];  // List of messages sorted by Time
	// Messages have these fields:
	//   Time: The timestamp.  Median of ServerTimes
	//   ID: Some unique string for deduping
	//   Text: The text of the message
	//   ServerTimes: server -> timestamp
	//   UI: The DOM node for this message in the UI

	function rcnick() {
		var nick = localStorage.getItem("nick");
		if (nick) {
			return nick;
		}
		return 'anonymous';
	}

	function rcsetnick(new_nick) {
		localStorage.setItem("nick", new_nick);
	}

	function rcserverbase(server) {
		// Add the default port if server doesn't contain a port number already
		if (server.indexOf(":") == -1) {
			return "http://" + server + ":21059";
		} else {
			return "http://" + server;
		}
	}

	function rcchangeserverstatus(server, new_status) {
		var statusbar = document.getElementById("status");
		var spans = statusbar.getElementsByTagName("span");
		for (var i in spans) {
			if (spans[i].firstChild && 'data' in spans[i].firstChild && spans[i].firstChild.data == server) {
				spans[i].setAttribute("class", new_status);
			}
		}
	}

	function rcformattime(t) {
		var d = t.getDay();
		d = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][d];
		var h = t.getHours();
		var m = t.getMinutes();
		var s = t.getSeconds();
		function pad(x) {
			return (x < 10 ? "0" : "") + x;
		}
		return d + " " + pad(h) + ":" + pad(m) + ":" + pad(s);
	}

	function rcaddmessagetohistory(message) {
		var message_i;
		if (message.Time) {
			for (var i = history.length - 1; ; i--) {
				if (i < 0 || (history[i].Time && message.Time >= history[i].Time)) {
					message_i = i+1;
					history.splice(message_i, 0, message);
					break;
				}
			}
		} else {
			history.push(message);
			message_i = history.length-1;
		}

		if (!message.UI) {
			message.UI = document.createElement("div");

			// Server count
			var servercount = document.createElement("span");
			servercount.setAttribute("class", "servercount");
			servercount.appendChild(document.createTextNode(Object.keys(message.ServerTimes).length));
			message.UI.appendChild(servercount);

			// Timestamp
			var timestamp_text = message.Time ? rcformattime(message.Time) : "";
			var timestamp = document.createElement("span");
			timestamp.setAttribute("class", "timestamp");
			timestamp.appendChild(document.createTextNode(timestamp_text));
			message.UI.appendChild(timestamp);

			message.UI.appendChild(document.createTextNode(message.Text));
		}
		var h = document.getElementById("history");
		if (message_i + 1 < history.length) {
			h.insertBefore(message.UI, history[message_i + 1].UI);
		} else {
			h.appendChild(message.UI);
		}
		window.scrollTo(0, document.body.scrollHeight);
	}

	function make_seen_key(id, text) {
		return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
	}

	function rcupdatemessagetime(message) {
		// Set message.Time to be the median of message.ServerTimes
		var times = [];
		for (var i in message.ServerTimes) {
			times.push(message.ServerTimes[i]);
		}
		times.sort();
		if (times.length % 2) {
			message.Time = times[(times.length-1)/2];
		} else {
			var middle = times.length/2;
			var difference = times[middle].getTime() - times[middle-1].getTime();
			message.Time = new Date(times[middle-1].getTime() + difference/2);
		}

		// This may have broken history's in-sorted-order invariant
		var hi = history.indexOf(message);
		if ((history[hi-1] && history[hi-1].Time > message.Time) ||
		    (history[hi+1] && history[hi+1].Time < message.Time)) {
			history.splice(hi,1);
			rcaddmessagetohistory(message);
		}

		// Update the UI
		var spans = message.UI.getElementsByTagName("span");
		for (var i in spans) {
			if (spans[i].getAttribute) {
				var type = spans[i].getAttribute("class");
				if (type == "servercount") {
					spans[i].firstChild.data = Object.keys(message.ServerTimes).length;
				} else if (type == "timestamp") {
					spans[i].firstChild.data = rcformattime(message.Time);
				}
			}
		}
	}

	function rcreceivemessages(server, messages) {
		for (var i in messages) {
			var m = messages[i];
			m.Time = new Date(m.Time);
			var seen_key = make_seen_key(m.ID, m.Text);
			if (seen_key in seen) {
				seen[seen_key].ServerTimes[server] = m.Time;
				rcupdatemessagetime(seen[seen_key]);
			} else {
				m.ServerTimes = {};
				m.ServerTimes[server] = m.Time;
				seen[seen_key] = m;
				rcaddmessagetohistory(m);
				for (var i in servers) {
					rcchangeserverstatus(servers[i], "sad");
				}
			}
			rcchangeserverstatus(server, "happy");
		}
	}

	function rcfetch(server) {
		var delay = 10000;  // TODO: Exponential backoff
		var xhr = new XMLHttpRequest();
		xhr.onreadystatechange = function() {
			if (this.readyState == this.DONE) {
				if (this.status == 200) {
					var rtxt = this.responseText;
					if (rtxt != null) {
						var messages = JSON.parse(rtxt);
						if (messages != null) {
							delay = 40;
							if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
								since[server] = messages[messages.length-1].Time;
							}
							rcreceivemessages(server, messages);
						}
					}
				}
				window.setTimeout(rcfetch, delay, server);
			}
		}
		var uri = rcserverbase(server) + "/fetch";
		if (server in since) {
			uri += '?since="' + since[server] + '"';
		}
		xhr.open("GET", uri);
		xhr.send();
	}

	function rcconnect() {
		for (var i in servers) {
			rcfetch(servers[i]);
			// Status bar entry
			var status_indicator = document.createElement("span");
			status_indicator.appendChild(document.createTextNode(servers[i]));
			status_indicator.setAttribute("class", "sad");
			document.getElementById("status").appendChild(status_indicator);
		}
	}

	function rcsend(d, message) {
		message.ID = new Date().getTime() + "-" + session + "-" + Math.random();
		seen[make_seen_key(message.ID, message.Text)] = message;
		var path = "/speak" +
			"?id=" + encodeURIComponent(message.ID) +
			"&text=" + encodeURIComponent(message.Text);
		for (var i in servers) {
			var uri = rcserverbase(servers[i]) + path;
			var img = document.createElement("img");
			img.setAttribute("src", uri);
			d.appendChild(img);
		}
	}

	function rcinput(input) {
		var message;
		var re = /^\/([a-z]+) (.*)/
		var match = re.exec(input);
		if (match && match[1] == 'me') {
			message = "* " + rcnick() + "  " + match[2];
		} else if (match && match[1] == 'nick') {
			message = "*** " + rcnick() + " is now known as " + match[2];
			rcsetnick(match[2]);
		} else {
			message = "<" + rcnick() + "> " + input;
		}

		var m = {'Text': message, 'ServerTimes': {}};
		rcaddmessagetohistory(m);
		rcsend(m.UI, m);
	}

	function rckeydown(event) {
		if (event.keyCode == 13) {
			rcinput(document.input.say.value);
			document.input.say.value = "";
			
		}
	}
  //--><!]]></script>

</head>

<body onload="rcconnect()">
	<div id="container">
		<div id="history"></div>
		<div id="client">
			<div id="input">
				<form name="input" onsubmit="return false" autocomplete="off">
					<input id="say" onkeydown="return rckeydown(event)" autocomplete="off" autofocus="autofocus"></input>
				</form></div>
			<div id="status">&nbsp;</div>
		</div>
	</div>
</body>
</html>
Commit	Line	Data
827f21bb SW	1	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
827f21bb SW	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>
827f21bb SW	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;
b22a2ced JH	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	}
c0aac85a SW	59	.servercount {
	60	margin-right: 0.5em;
	61	font-size: 70%;
	62	}
4b184c5f SW	63	.timestamp {
	64	margin-right: 0.8em;
	65	}
0248a518 SW	66	img { width: 1px; height: 1px; }
0248a518 SW	67	iframe { display: none }
70f46223	68	#status span { margin-right: 10px; }
f09c4ede JH	69	#status span.sad {
	70	background-color: #f00;
	71	color: #fff;
	72	border: 1px solid black;
	73	border-radius: 5px;
	74	padding-left: 5px;
	75	padding-right: 5px;
	76	}
	77	#status span.happy {
	78	background-color: #0f0;
	79	color: #000;
	80	border: 1px solid black;
	81	border-radius: 5px;
	82	padding-left: 5px;
	83	padding-right: 5px;
	84	}
0248a518 SW	85	/]]>/--></style>
	86	<script type="text/javascript"><!--//--><![CDATA[//><!--
	87	var servers = ['chkno.net', 'rc2.chkno.net', 'echto.net', 'the-wes.com', 'vibrantlogic.com'];
	88
da9ce2ab	89	var session = Math.random(); // For outgoing message IDs
869430fa SW	90	var since = {}; // server -> time: For fetch?since=
869430fa SW	91	var seen = {}; // seen_key -> message
7f54ca0a	92	var history = []; // List of messages sorted by Time
5419ea4c	93	// Messages have these fields:
40380bd3	94	// Time: The timestamp. Median of ServerTimes
5419ea4c SW	95	// ID: Some unique string for deduping
5419ea4c SW	96	// Text: The text of the message
705e26cf	97	// ServerTimes: server -> timestamp
5419ea4c	98	// UI: The DOM node for this message in the UI
0248a518 SW	99
	100	function rcnick() {
	101	var nick = localStorage.getItem("nick");
	102	if (nick) {
	103	return nick;
	104	}
	105	return 'anonymous';
	106	}
	107
	108	function rcsetnick(new_nick) {
	109	localStorage.setItem("nick", new_nick);
	110	}
	111
	112	function rcserverbase(server) {
	113	// Add the default port if server doesn't contain a port number already
	114	if (server.indexOf(":") == -1) {
	115	return "http://" + server + ":21059";
	116	} else {
	117	return "http://" + server;
	118	}
	119	}
	120
	121	function rcchangeserverstatus(server, new_status) {
	122	var statusbar = document.getElementById("status");
	123	var spans = statusbar.getElementsByTagName("span");
	124	for (var i in spans) {
	125	if (spans[i].firstChild && 'data' in spans[i].firstChild && spans[i].firstChild.data == server) {
	126	spans[i].setAttribute("class", new_status);
	127	}
	128	}
	129	}
	130
bd1ed9dd SW	131	function rcformattime(t) {
	132	var d = t.getDay();
	133	d = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][d];
	134	var h = t.getHours();
	135	var m = t.getMinutes();
	136	var s = t.getSeconds();
	137	function pad(x) {
	138	return (x < 10 ? "0" : "") + x;
	139	}
	140	return d + " " + pad(h) + ":" + pad(m) + ":" + pad(s);
	141	}
	142
0248a518	143	function rcaddmessagetohistory(message) {
7f54ca0a SW	144	var message_i;
	145	if (message.Time) {
	146	for (var i = history.length - 1; ; i--) {
	147	if (i < 0 \|\| (history[i].Time && message.Time >= history[i].Time)) {
	148	message_i = i+1;
	149	history.splice(message_i, 0, message);
	150	break;
	151	}
	152	}
	153	} else {
	154	history.push(message);
	155	message_i = history.length-1;
	156	}
	157
95ba71ee	158	if (!message.UI) {
c0aac85a SW	159	message.UI = document.createElement("div");
	160
	161	// Server count
	162	var servercount = document.createElement("span");
	163	servercount.setAttribute("class", "servercount");
	164	servercount.appendChild(document.createTextNode(Object.keys(message.ServerTimes).length));
	165	message.UI.appendChild(servercount);
	166
	167	// Timestamp
4b184c5f SW	168	var timestamp_text = message.Time ? rcformattime(message.Time) : "";
	169	var timestamp = document.createElement("span");
	170	timestamp.setAttribute("class", "timestamp");
	171	timestamp.appendChild(document.createTextNode(timestamp_text));
4b184c5f	172	message.UI.appendChild(timestamp);
c0aac85a	173
4b184c5f	174	message.UI.appendChild(document.createTextNode(message.Text));
95ba71ee	175	}
0248a518	176	var h = document.getElementById("history");
7f54ca0a SW	177	if (message_i + 1 < history.length) {
	178	h.insertBefore(message.UI, history[message_i + 1].UI);
	179	} else {
	180	h.appendChild(message.UI);
	181	}
0248a518	182	window.scrollTo(0, document.body.scrollHeight);
0248a518 SW	183	}
	184
	185	function make_seen_key(id, text) {
	186	return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
	187	}
	188
40380bd3 SW	189	function rcupdatemessagetime(message) {
	190	// Set message.Time to be the median of message.ServerTimes
	191	var times = [];
	192	for (var i in message.ServerTimes) {
	193	times.push(message.ServerTimes[i]);
	194	}
	195	times.sort();
40380bd3	196	if (times.length % 2) {
ac4bf273	197	message.Time = times[(times.length-1)/2];
40380bd3	198	} else {
ac4bf273	199	var middle = times.length/2;
40380bd3 SW	200	var difference = times[middle].getTime() - times[middle-1].getTime();
	201	message.Time = new Date(times[middle-1].getTime() + difference/2);
	202	}
95ba71ee SW	203
	204	// This may have broken history's in-sorted-order invariant
	205	var hi = history.indexOf(message);
	206	if ((history[hi-1] && history[hi-1].Time > message.Time) \|\|
	207	(history[hi+1] && history[hi+1].Time < message.Time)) {
	208	history.splice(hi,1);
	209	rcaddmessagetohistory(message);
	210	}
5be4c8ec SW	211
	212	// Update the UI
	213	var spans = message.UI.getElementsByTagName("span");
	214	for (var i in spans) {
c0aac85a SW	215	if (spans[i].getAttribute) {
	216	var type = spans[i].getAttribute("class");
	217	if (type == "servercount") {
	218	spans[i].firstChild.data = Object.keys(message.ServerTimes).length;
	219	} else if (type == "timestamp") {
	220	spans[i].firstChild.data = rcformattime(message.Time);
	221	}
5be4c8ec SW	222	}
5be4c8ec SW	223	}
40380bd3 SW	224	}
40380bd3 SW	225
79ced6f1 SW	226	function rcreceivemessages(server, messages) {
79ced6f1 SW	227	for (var i in messages) {
ad35b1be	228	var m = messages[i];
bd1ed9dd	229	m.Time = new Date(m.Time);
ad35b1be	230	var seen_key = make_seen_key(m.ID, m.Text);
705e26cf SW	231	if (seen_key in seen) {
705e26cf SW	232	seen[seen_key].ServerTimes[server] = m.Time;
40380bd3	233	rcupdatemessagetime(seen[seen_key]);
705e26cf	234	} else {
16640c5d SW	235	m.ServerTimes = {};
16640c5d SW	236	m.ServerTimes[server] = m.Time;
869430fa	237	seen[seen_key] = m;
ad35b1be	238	rcaddmessagetohistory(m);
79ced6f1 SW	239	for (var i in servers) {
	240	rcchangeserverstatus(servers[i], "sad");
	241	}
0248a518	242	}
79ced6f1	243	rcchangeserverstatus(server, "happy");
0248a518	244	}
0248a518 SW	245	}
0248a518 SW	246
79ced6f1 SW	247	function rcfetch(server) {
	248	var delay = 10000; // TODO: Exponential backoff
	249	var xhr = new XMLHttpRequest();
	250	xhr.onreadystatechange = function() {
	251	if (this.readyState == this.DONE) {
	252	if (this.status == 200) {
	253	var rtxt = this.responseText;
	254	if (rtxt != null) {
	255	var messages = JSON.parse(rtxt);
	256	if (messages != null) {
79ced6f1 SW	257	delay = 40;
79ced6f1 SW	258	if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
ad35b1be	259	since[server] = messages[messages.length-1].Time;
79ced6f1	260	}
92ca5f8a	261	rcreceivemessages(server, messages);
79ced6f1	262	}
0248a518 SW	263	}
0248a518 SW	264	}
79ced6f1	265	window.setTimeout(rcfetch, delay, server);
0248a518 SW	266	}
0248a518 SW	267	}
79ced6f1 SW	268	var uri = rcserverbase(server) + "/fetch";
	269	if (server in since) {
	270	uri += '?since="' + since[server] + '"';
	271	}
	272	xhr.open("GET", uri);
	273	xhr.send();
0248a518 SW	274	}
	275
	276	function rcconnect() {
0248a518	277	for (var i in servers) {
79ced6f1	278	rcfetch(servers[i]);
0248a518 SW	279	// Status bar entry
	280	var status_indicator = document.createElement("span");
	281	status_indicator.appendChild(document.createTextNode(servers[i]));
	282	status_indicator.setAttribute("class", "sad");
	283	document.getElementById("status").appendChild(status_indicator);
	284	}
0248a518 SW	285	}
	286
	287	function rcsend(d, message) {
7f54ca0a SW	288	message.ID = new Date().getTime() + "-" + session + "-" + Math.random();
7f54ca0a SW	289	seen[make_seen_key(message.ID, message.Text)] = message;
0248a518	290	var path = "/speak" +
7f54ca0a SW	291	"?id=" + encodeURIComponent(message.ID) +
7f54ca0a SW	292	"&text=" + encodeURIComponent(message.Text);
0248a518 SW	293	for (var i in servers) {
	294	var uri = rcserverbase(servers[i]) + path;
	295	var img = document.createElement("img");
	296	img.setAttribute("src", uri);
	297	d.appendChild(img);
	298	}
	299	}
	300
5a6c082a SW	301	function rcinput(input) {
	302	var message;
	303	var re = /^\/([a-z]+) (.*)/
	304	var match = re.exec(input);
	305	if (match && match[1] == 'me') {
	306	message = "* " + rcnick() + " " + match[2];
	307	} else if (match && match[1] == 'nick') {
	308	message = "*** " + rcnick() + " is now known as " + match[2];
	309	rcsetnick(match[2]);
	310	} else {
	311	message = "<" + rcnick() + "> " + input;
	312	}
	313
7f54ca0a	314	var m = {'Text': message, 'ServerTimes': {}};
869430fa SW	315	rcaddmessagetohistory(m);
869430fa SW	316	rcsend(m.UI, m);
5a6c082a SW	317	}
5a6c082a SW	318
0248a518 SW	319	function rckeydown(event) {
0248a518 SW	320	if (event.keyCode == 13) {
5a6c082a	321	rcinput(document.input.say.value);
0248a518 SW	322	document.input.say.value = "";
0248a518 SW	323
0248a518 SW	324	}
	325	}
	326	//--><!]]></script>
	327
827f21bb SW	328	</head>
827f21bb SW	329
f0e385c7	330	<body onload="rcconnect()">
70f46223 JH	331	<div id="container">
	332	<div id="history"></div>
	333	<div id="client">
	334	<div id="input">
	335	<form name="input" onsubmit="return false" autocomplete="off">
	336	<input id="say" onkeydown="return rckeydown(event)" autocomplete="off" autofocus="autofocus"></input>
	337	</form></div>
	338	<div id="status"> </div>
	339	</div>
	340	</div>
827f21bb SW	341	</body>
827f21bb SW	342	</html>