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	.timestamp {
	60	margin-right: 0.8em;
	61	}
	62	img { width: 1px; height: 1px; }
	63	iframe { display: none }
	64	#status span { margin-right: 10px; }
	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	}
	81	/]]>/--></style>
	82	<script type="text/javascript"><!--//--><![CDATA[//><!--
	83	var servers = ['chkno.net', 'rc2.chkno.net', 'echto.net', 'the-wes.com', 'vibrantlogic.com'];
	84
	85	var session = Math.random(); // For outgoing message IDs
	86	var since = {}; // server -> time: For fetch?since=
	87	var seen = {}; // seen_key -> message
	88	var history = []; // List of messages sorted by Time
	89	// Messages have these fields:
	90	// Time: The timestamp. Median of ServerTimes
	91	// ID: Some unique string for deduping
	92	// Text: The text of the message
	93	// ServerTimes: server -> timestamp
	94	// UI: The DOM node for this message in the UI
	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
	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
	139	function rcaddmessagetohistory(message) {
	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
	154	if (!message.UI) {
	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));
	159	message.UI = document.createElement("div");
	160	message.UI.appendChild(timestamp);
	161	message.UI.appendChild(document.createTextNode(message.Text));
	162	}
	163	var h = document.getElementById("history");
	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	}
	169	window.scrollTo(0, document.body.scrollHeight);
	170	}
	171
	172	function make_seen_key(id, text) {
	173	return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@");
	174	}
	175
	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();
	183	if (times.length % 2) {
	184	message.Time = times[(times.length-1)/2];
	185	} else {
	186	var middle = times.length/2;
	187	var difference = times[middle].getTime() - times[middle-1].getTime();
	188	message.Time = new Date(times[middle-1].getTime() + difference/2);
	189	}
	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	}
	198	}
	199
	200	function rcreceivemessages(server, messages) {
	201	for (var i in messages) {
	202	var m = messages[i];
	203	m.Time = new Date(m.Time);
	204	var seen_key = make_seen_key(m.ID, m.Text);
	205	if (seen_key in seen) {
	206	seen[seen_key].ServerTimes[server] = m.Time;
	207	rcupdatemessagetime(seen[seen_key]);
	208	} else {
	209	m.ServerTimes = {};
	210	m.ServerTimes[server] = m.Time;
	211	seen[seen_key] = m;
	212	rcaddmessagetohistory(m);
	213	for (var i in servers) {
	214	rcchangeserverstatus(servers[i], "sad");
	215	}
	216	}
	217	rcchangeserverstatus(server, "happy");
	218	}
	219	}
	220
	221	function rcfetch(server) {
	222	var delay = 10000; // TODO: Exponential backoff
	223	var xhr = new XMLHttpRequest();
	224	xhr.onreadystatechange = function() {
	225	if (this.readyState == this.DONE) {
	226	if (this.status == 200) {
	227	var rtxt = this.responseText;
	228	if (rtxt != null) {
	229	var messages = JSON.parse(rtxt);
	230	if (messages != null) {
	231	delay = 40;
	232	if (messages.length >= 1 && "Time" in messages[messages.length-1]) {
	233	since[server] = messages[messages.length-1].Time;
	234	}
	235	rcreceivemessages(server, messages);
	236	}
	237	}
	238	}
	239	window.setTimeout(rcfetch, delay, server);
	240	}
	241	}
	242	var uri = rcserverbase(server) + "/fetch";
	243	if (server in since) {
	244	uri += '?since="' + since[server] + '"';
	245	}
	246	xhr.open("GET", uri);
	247	xhr.send();
	248	}
	249
	250	function rcconnect() {
	251	for (var i in servers) {
	252	rcfetch(servers[i]);
	253	// Status bar entry
	254	var status_indicator = document.createElement("span");
	255	status_indicator.appendChild(document.createTextNode(servers[i]));
	256	status_indicator.setAttribute("class", "sad");
	257	document.getElementById("status").appendChild(status_indicator);
	258	}
	259	}
	260
	261	function rcsend(d, message) {
	262	message.ID = new Date().getTime() + "-" + session + "-" + Math.random();
	263	seen[make_seen_key(message.ID, message.Text)] = message;
	264	var path = "/speak" +
	265	"?id=" + encodeURIComponent(message.ID) +
	266	"&text=" + encodeURIComponent(message.Text);
	267	for (var i in servers) {
	268	var uri = rcserverbase(servers[i]) + path;
	269	var img = document.createElement("img");
	270	img.setAttribute("src", uri);
	271	d.appendChild(img);
	272	}
	273	}
	274
	275	function rcinput(input) {
	276	var message;
	277	var re = /^\/([a-z]+) (.*)/
	278	var match = re.exec(input);
	279	if (match && match[1] == 'me') {
	280	message = "* " + rcnick() + " " + match[2];
	281	} else if (match && match[1] == 'nick') {
	282	message = "*** " + rcnick() + " is now known as " + match[2];
	283	rcsetnick(match[2]);
	284	} else {
	285	message = "<" + rcnick() + "> " + input;
	286	}
	287
	288	var m = {'Text': message, 'ServerTimes': {}};
	289	rcaddmessagetohistory(m);
	290	rcsend(m.UI, m);
	291	}
	292
	293	function rckeydown(event) {
	294	if (event.keyCode == 13) {
	295	rcinput(document.input.say.value);
	296	document.input.say.value = "";
	297
	298	}
	299	}
	300	//--><!]]></script>
	301
	302	</head>
	303
	304	<body onload="rcconnect()">
	305	<div id="container">
	306	<div id="history"></div>
	307	<div id="client">
	308	<div id="input">
	309	<form name="input" onsubmit="return false" autocomplete="off">
	310	<input id="say" onkeydown="return rckeydown(event)" autocomplete="off" autofocus="autofocus"></input>
	311	</form></div>
	312	<div id="status"> </div>
	313	</div>
	314	</div>
	315	</body>
	316	</html>