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	#container {
	35	height: 100%;
	36	}
	37	#status {
	38	width: 100%;
	39	text-align: right;
	40	background-color: #293134;
	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%;
	52	background-color: #293134;
	53	}
	54	#say { width: 100% }
	55	#history {
	56	padding: 0px 5px 55px 5px;
	57	vertical-align: bottom
	58	}
	59	.servercount {
	60	margin-right: 0.5em;
	61	font-size: 70%;
	62	}
	63	.timestamp {
	64	margin-right: 0.8em;
	65	}
	66	img { width: 1px; height: 1px; }
	67	iframe { display: none }
	68	#status span { margin-right: 10px; }
	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	}
	85	/]]>/--></style>
	86	<script type="text/javascript"><!--//--><![CDATA[//><!--
	87	var servers = ['chkno.net', 'rc2.chkno.net', 'echto.net', 'the-wes.com', 'vibrantlogic.com'];
	88
	89	var session = Math.random(); // For outgoing message IDs
	90	var since = {}; // server -> time: For fetch?since=
	91	var seen = {}; // seen_key -> message
	92	var history = []; // List of messages sorted by Time
	93	// Messages have these fields:
	94	// Time: The timestamp. Median of ServerTimes
	95	// ID: Some unique string for deduping
	96	// Text: The text of the message
	97	// ServerTimes: server -> timestamp
	98	// UI: The DOM node for this message in the UI
	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
	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
	143	function rcmakemessageUI(message) {
	144	message.UI = document.createElement("div");
	145
	146	// Server count
	147	var servercount = document.createElement("span");
	148	servercount.setAttribute("class", "servercount");
	149	servercount.appendChild(document.createTextNode(Object.keys(message.ServerTimes).length));
	150	message.UI.appendChild(servercount);
	151
	152	// Timestamp
	153	var timestamp_text = message.Time ? rcformattime(message.Time) : "";
	154	var timestamp = document.createElement("span");
	155	timestamp.setAttribute("class", "timestamp");
	156	timestamp.appendChild(document.createTextNode(timestamp_text));
	157	message.UI.appendChild(timestamp);
	158
	159	message.UI.appendChild(document.createTextNode(message.Text));
	160	}
	161
	162	function rcaddmessagetohistory(message) {
	163	var message_i;
	164	if (message.Time) {
	165	for (var i = history.length - 1; ; i--) {
	166	if (i < 0 \|\| (history[i].Time && message.Time >= history[i].Time)) {
	167	message_i = i+1;
	168	history.splice(message_i, 0, message);
	169	break;
	170	}
	171	}
	172	} else {
	173	history.push(message);
	174	message_i = history.length-1;
	175	}
	176
	177	if (!message.UI) {
	178	rcmakemessageUI(message);
	179	}
	180	var h = document.getElementById("history");
	181	if (message_i + 1 < history.length) {
	182	h.insertBefore(message.UI, history[message_i + 1].UI);
	183	} else {
	184	h.appendChild(message.UI);
	185	}
	186	window.scrollTo(0, document.body.scrollHeight);
	187	}
	188
	189	function make_seen_key(id, text) {
	190	return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
	191	}
	192
	193	function rcupdatemessagetime(message) {
	194	// Set message.Time to be the median of message.ServerTimes
	195	var times = [];
	196	for (var i in message.ServerTimes) {
	197	times.push(message.ServerTimes[i]);
	198	}
	199	times.sort();
	200	if (times.length % 2) {
	201	message.Time = times[(times.length-1)/2];
	202	} else {
	203	var middle = times.length/2;
	204	var difference = times[middle].getTime() - times[middle-1].getTime();
	205	message.Time = new Date(times[middle-1].getTime() + difference/2);
	206	}
	207
	208	// This may have broken history's in-sorted-order invariant
	209	var hi = history.indexOf(message);
	210	if ((history[hi-1] && history[hi-1].Time > message.Time) \|\|
	211	(history[hi+1] && history[hi+1].Time < message.Time)) {
	212	history.splice(hi,1);
	213	rcaddmessagetohistory(message);
	214	}
	215
	216	// Update the UI
	217	var spans = message.UI.getElementsByTagName("span");
	218	for (var i in spans) {
	219	if (spans[i].getAttribute) {
	220	var type = spans[i].getAttribute("class");
	221	if (type == "servercount") {
	222	spans[i].firstChild.data = Object.keys(message.ServerTimes).length;
	223	} else if (type == "timestamp") {
	224	spans[i].firstChild.data = rcformattime(message.Time);
	225	}
	226	}
	227	}
	228	}
	229
	230	function rcreceivemessages(server, messages) {
	231	for (var i in messages) {
	232	var m = messages[i];
	233	m.Time = new Date(m.Time);
	234	var seen_key = make_seen_key(m.ID, m.Text);
	235	if (seen_key in seen) {
	236	seen[seen_key].ServerTimes[server] = m.Time;
	237	rcupdatemessagetime(seen[seen_key]);
	238	} else {
	239	m.ServerTimes = {};
	240	m.ServerTimes[server] = m.Time;
	241	seen[seen_key] = m;
	242	rcaddmessagetohistory(m);
	243	for (var i in servers) {
	244	rcchangeserverstatus(servers[i], "sad");
	245	}
	246	}
	247	rcchangeserverstatus(server, "happy");
	248	}
	249	}
	250
	251	function rcfetch(server) {
	252	var delay = 10000; // TODO: Exponential backoff
	253	var xhr = new XMLHttpRequest();
	254	xhr.onreadystatechange = function() {
	255	if (this.readyState == this.DONE) {
	256	if (this.status == 200) {
	257	var rtxt = this.responseText;
	258	if (rtxt != null) {
	259	var messages = JSON.parse(rtxt);
	260	if (messages != null) {
	261	delay = 40;
	262	if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
	263	since[server] = messages[messages.length-1].Time;
	264	}
	265	rcreceivemessages(server, messages);
	266	}
	267	}
	268	}
	269	window.setTimeout(rcfetch, delay, server);
	270	}
	271	}
	272	var uri = rcserverbase(server) + "/fetch";
	273	if (server in since) {
	274	uri += '?since="' + since[server] + '"';
	275	}
	276	xhr.open("GET", uri);
	277	xhr.send();
	278	}
	279
	280	function rcconnect() {
	281	for (var i in servers) {
	282	rcfetch(servers[i]);
	283	// Status bar entry
	284	var status_indicator = document.createElement("span");
	285	status_indicator.appendChild(document.createTextNode(servers[i]));
	286	status_indicator.setAttribute("class", "sad");
	287	document.getElementById("status").appendChild(status_indicator);
	288	}
	289	}
	290
	291	function rcsend(d, message) {
	292	message.ID = new Date().getTime() + "-" + session + "-" + Math.random();
	293	seen[make_seen_key(message.ID, message.Text)] = message;
	294	var path = "/speak" +
	295	"?id=" + encodeURIComponent(message.ID) +
	296	"&text=" + encodeURIComponent(message.Text);
	297	for (var i in servers) {
	298	var uri = rcserverbase(servers[i]) + path;
	299	var img = document.createElement("img");
	300	img.setAttribute("src", uri);
	301	d.appendChild(img);
	302	}
	303	}
	304
	305	function rcinput(input) {
	306	var message;
	307	var re = /^\/([a-z]+) (.*)/
	308	var match = re.exec(input);
	309	if (match && match[1] == 'me') {
	310	message = "* " + rcnick() + " " + match[2];
	311	} else if (match && match[1] == 'nick') {
	312	message = "*** " + rcnick() + " is now known as " + match[2];
	313	rcsetnick(match[2]);
	314	} else {
	315	message = "<" + rcnick() + "> " + input;
	316	}
	317
	318	var m = {'Text': message, 'ServerTimes': {}};
	319	rcaddmessagetohistory(m);
	320	rcsend(m.UI, m);
	321	}
	322
	323	function rckeydown(event) {
	324	if (event.keyCode == 13) {
	325	rcinput(document.input.say.value);
	326	document.input.say.value = "";
	327
	328	}
	329	}
	330	//--><!]]></script>
	331
	332	</head>
	333
	334	<body onload="rcconnect()">
	335	<div id="container">
	336	<div id="history"></div>
	337	<div id="client">
	338	<div id="input">
	339	<form name="input" onsubmit="return false" autocomplete="off">
	340	<input id="say" onkeydown="return rckeydown(event)" autocomplete="off" autofocus="autofocus"></input>
	341	</form></div>
	342	<div id="status"> </div>
	343	</div>
	344	</div>
	345	</body>
	346	</html>