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 rcformattime(t) {
	151	var d = t.getDay();
	152	d = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][d];
	153	var h = t.getHours();
	154	var m = t.getMinutes();
	155	var s = t.getSeconds();
	156	function pad(x) {
	157	return (x < 10 ? "0" : "") + x;
	158	}
	159	return d + " " + pad(h) + ":" + pad(m) + ":" + pad(s);
	160	}
	161
	162	function rcaddservertimestamptohover(message, server) {
	163	var divs = message.UI.getElementsByTagName("div");
	164	for (var i in divs) {
	165	if (divs[i].getAttribute && divs[i].getAttribute("class") == "servertimestamps") {
	166	var d = document.createElement("div");
	167	function pad(x) {
	168	return (x < 10 ? "00" : (x < 100 ? "0" : "")) + x;
	169	}
	170	var text = rcformattime(message.ServerTimes[server]) + "." + pad(message.ServerTimes[server].getUTCMilliseconds()) + " " + server;
	171	d.appendChild(document.createTextNode(text));
	172	divs[i].appendChild(d);
	173	}
	174	}
	175	}
	176
	177	function rcmakemessageUI(message) {
	178	message.UI = document.createElement("div");
	179
	180	// Server count
	181	var servercount = document.createElement("span");
	182	servercount.setAttribute("class", "servercount");
	183	servercount.appendChild(document.createTextNode(Object.keys(message.ServerTimes).length));
	184	message.UI.appendChild(servercount);
	185
	186	// Timestamp
	187	var timestamp_text = message.Time ? rcformattime(message.Time) : "";
	188	var timestamp = document.createElement("span");
	189	timestamp.setAttribute("class", "timestamp");
	190	timestamp.appendChild(document.createTextNode(timestamp_text));
	191	message.UI.appendChild(timestamp);
	192
	193	// Timestamp hover
	194	var timestamp_hover = document.createElement("div");
	195	timestamp_hover.setAttribute("class", "servertimestamps");
	196	timestamp.appendChild(timestamp_hover);
	197	for (var server in message.ServerTimes) {
	198	rcaddservertimestamptohover(message, server);
	199	}
	200
	201	// Classify different message types
	202	var text_span = document.createElement("span");
	203	var type;
	204	if (/^\\\* /.test(message.Text)) {
	205	type = "status";
	206	} else if (/^\* /.test(message.Text)) {
	207	type = "me";
	208	} else {
	209	type = "text";
	210	}
	211	if (Object.keys(message.ServerTimes).length == 0) {
	212	type += " self";
	213	}
	214	text_span.setAttribute("class", type);
	215
	216	// URL detection
	217	var text = message.Text;
	218	var URL_re = /\bhttps?:\/\/\S+/;
	219	while (URL_re.test(text)) {
	220	var match = URL_re.exec(text);
	221	var leading_text = text.substr(0, match.index);
	222	if (leading_text) {
	223	text_span.appendChild(document.createTextNode(leading_text));
	224	}
	225	var anchor = document.createElement("a");
	226	anchor.setAttribute("href", encodeURI(match[0]));
	227	anchor.appendChild(document.createTextNode(match[0]));
	228	text_span.appendChild(anchor);
	229	text = text.substr(match.index + match[0].length);
	230	}
	231	if (text) {
	232	text_span.appendChild(document.createTextNode(text));
	233	}
	234
	235	message.UI.appendChild(text_span);
	236	}
	237
	238	function rcaddmessagetohistory(message) {
	239	var message_i;
	240	if (message.Time) {
	241	for (var i = history.length - 1; ; i--) {
	242	if (i < 0 \|\| (history[i].Time && message.Time >= history[i].Time)) {
	243	message_i = i+1;
	244	history.splice(message_i, 0, message);
	245	break;
	246	}
	247	}
	248	} else {
	249	history.push(message);
	250	message_i = history.length-1;
	251	}
	252
	253	if (!message.UI) {
	254	rcmakemessageUI(message);
	255	}
	256	var h = document.getElementById("history");
	257	if (message_i + 1 < history.length) {
	258	h.insertBefore(message.UI, history[message_i + 1].UI);
	259	} else {
	260	h.appendChild(message.UI);
	261	}
	262	window.scrollTo(0, document.body.scrollHeight);
	263	}
	264
	265	function make_seen_key(id, text) {
	266	return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
	267	}
	268
	269	function rcupdatemessagetime(message) {
	270	// Set message.Time to be the median of message.ServerTimes
	271	var times = [];
	272	for (var i in message.ServerTimes) {
	273	times.push(message.ServerTimes[i]);
	274	}
	275	times.sort();
	276	if (times.length % 2) {
	277	message.Time = times[(times.length-1)/2];
	278	} else {
	279	var middle = times.length/2;
	280	var difference = times[middle].getTime() - times[middle-1].getTime();
	281	message.Time = new Date(times[middle-1].getTime() + difference/2);
	282	}
	283
	284	// This may have broken history's in-sorted-order invariant
	285	var hi = history.indexOf(message);
	286	if ((history[hi-1] && history[hi-1].Time > message.Time) \|\|
	287	(history[hi+1] && history[hi+1].Time < message.Time)) {
	288	history.splice(hi,1);
	289	rcaddmessagetohistory(message);
	290	}
	291
	292	// Update the UI
	293	var spans = message.UI.getElementsByTagName("span");
	294	for (var i in spans) {
	295	if (spans[i].getAttribute) {
	296	var type = spans[i].getAttribute("class");
	297	if (type == "servercount") {
	298	spans[i].firstChild.data = Object.keys(message.ServerTimes).length;
	299	} else if (type == "timestamp") {
	300	spans[i].firstChild.data = rcformattime(message.Time);
	301	}
	302	}
	303	}
	304	}
	305
	306	function rcreceivemessages(server, messages) {
	307	for (var i in messages) {
	308	var m = messages[i];
	309	m.Time = new Date(m.Time);
	310	var seen_key = make_seen_key(m.ID, m.Text);
	311	if (seen_key in seen) {
	312	seen[seen_key].ServerTimes[server] = m.Time;
	313	rcupdatemessagetime(seen[seen_key]);
	314	rcaddservertimestamptohover(seen[seen_key], server);
	315	} else {
	316	m.ServerTimes = {};
	317	m.ServerTimes[server] = m.Time;
	318	seen[seen_key] = m;
	319	rcaddmessagetohistory(m);
	320	for (var i in servers) {
	321	rcchangeserverstatus(servers[i], "sad");
	322	}
	323	}
	324	rcchangeserverstatus(server, "happy");
	325	}
	326	}
	327
	328	function rcfetch(server) {
	329	var delay = 10000; // TODO: Exponential backoff
	330	var xhr = new XMLHttpRequest();
	331	xhr.onreadystatechange = function() {
	332	if (this.readyState == this.DONE) {
	333	if (this.status == 200) {
	334	var rtxt = this.responseText;
	335	if (rtxt != null) {
	336	var messages = JSON.parse(rtxt);
	337	if (messages != null) {
	338	delay = 40;
	339	if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
	340	since[server] = messages[messages.length-1].Time;
	341	}
	342	rcreceivemessages(server, messages);
	343	}
	344	}
	345	}
	346	window.setTimeout(rcfetch, delay, server);
	347	}
	348	}
	349	var uri = rcserverbase(server) + "/fetch";
	350	if (server in since) {
	351	uri += '?since="' + since[server] + '"';
	352	}
	353	xhr.open("GET", uri);
	354	xhr.send();
	355	}
	356
	357	function rcconnect() {
	358	for (var i in servers) {
	359	rcfetch(servers[i]);
	360	// Status bar entry
	361	var status_indicator = document.createElement("span");
	362	status_indicator.appendChild(document.createTextNode(servers[i]));
	363	status_indicator.setAttribute("class", "sad");
	364	document.getElementById("status").appendChild(status_indicator);
	365	}
	366	}
	367
	368	function rcsend(d, message) {
	369	message.ID = new Date().getTime() + "-" + session + "-" + Math.random();
	370	seen[make_seen_key(message.ID, message.Text)] = message;
	371	var path = "/speak" +
	372	"?id=" + encodeURIComponent(message.ID) +
	373	"&text=" + encodeURIComponent(message.Text);
	374	for (var i in servers) {
	375	var uri = rcserverbase(servers[i]) + path;
	376	var img = document.createElement("img");
	377	img.setAttribute("src", uri);
	378	d.appendChild(img);
	379	}
	380	}
	381
	382	function rcinput(input) {
	383	var message;
	384	var re = /^\/([a-z]+) (.*)/
	385	var match = re.exec(input);
	386	if (match && match[1] == 'me') {
	387	message = "* " + rcnick() + " " + match[2];
	388	} else if (match && match[1] == 'nick') {
	389	message = "*** " + rcnick() + " is now known as " + match[2];
	390	rcsetnick(match[2]);
	391	} else {
	392	message = "<" + rcnick() + "> " + input;
	393	}
	394
	395	var m = {'Text': message, 'ServerTimes': {}};
	396	rcaddmessagetohistory(m);
	397	rcsend(m.UI, m);
	398	}
	399
	400	function rckeydown(event) {
	401	if (event.keyCode == 13) {
	402	rcinput(document.input.say.value);
	403	document.input.say.value = "";
	404
	405	}
	406	}
	407	//--><!]]></script>
	408
	409	</head>
	410
	411	<body onload="rcconnect()">
	412	<div id="container">
	413	<div id="history"></div>
	414	<div id="client">
	415	<div id="input">
	416	<form name="input" onsubmit="return false" autocomplete="off">
	417	<input id="say" onkeydown="return rckeydown(event)" autocomplete="off" autofocus="autofocus"></input>
	418	</form></div>
	419	<div id="status"> </div>
	420	</div>
	421	</div>
	422	</body>
	423	</html>