git.scottworley.com Git - reliable-chat/blame_incremental

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