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index.tmpl
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<!DOCTYPE html>
<html>
<head>
<title>Are we meeting yet?</title>
<meta charset="utf-8">
<style>
body {
text-align: center;
font-family: -apple-system, ".SFNSText-Regular", "San Francisco", "Roboto", "Segoe UI", "Helvetica Neue", "Lucida Grande", sans-serif;
text-rendering: optimizelegibility;
font-size: 1.8em;
font-weight: bold;
background: #fafafa;
color: #333;
padding: 2em;
}
div#wrap {
overflow: auto;
margin: 0px auto;
text-align: center;
width: 850px;
}
#title {
text-align: center;
font-size: 1.8em;
}
#url {
font-size: 0.8em;
}
p {
margin: 30px;
}
p#local, p#ref {
display: none;
text-align: center;
}
span.label {
display: block;
color: #aaa;
width: 100%;
font-weight: normal;
font-size: 0.7em;
margin: 10px;
}
section {
clear: both;
display: block;
font-weight: normal;
font-size: .55em;
margin: 4em auto 0em auto;
width: 450px;
}
section[hidden] {
display: none;
}
form {
text-align: left;
}
input {
font: inherit;
padding: .3em .5em;
}
label,
fieldset,
input[type="submit"] {
display: block;
margin: 1em 0 0;
}
fieldset {
border: none;
padding: 0;
}
fieldset > label {
display: inline;
padding-right: .7em;
}
label.name, legend.name {
padding-left: 1px;
padding-bottom: 5px;
}
.optional {
display: none;
}
footer {
margin-top: 80px;
}
footer p {
font-weight: normal;
font-size: 0.5em;
color: #999;
margin: 10px;
text-align: center;
}
a {
text-decoration: none;
color: #99f;
}
a.edit {
cursor: pointer;
}
a:hover, a:active {
color: #f99;
}
span.hint {
color: #aaa;
}
p.narrow {
margin: 0;
width: 450px;
}
</style>
</head>
<body>
<div id="wrap">
<h1 id="title" class="optional"></h1>
<a id="url" class="optional" href="#">Join this meeting</a>
<p id="local">
<span id="your" class="label">Your time:</span>
<span class="val"></span>
<span id="delta" class="label"></span>
</p>
<p id="ref" style="display: none;">
<span class="label">For your calendar (<a id="ical">add it</a>):</span>
<span class="val"></span>
<span id="zone" class="label"></span>
</p>
<section hidden>
<h1>Build new meeting link</h1>
<form id="form" action="/" method="get">
<p class="narrow">
Enter your meeting details to build a new URL. Click the button
at the bottom of the form to go there, then send the address
of that page to other meeting participants.
</p>
<label for="timezone" class="name">Timezone <span class="hint">(reference/stable timezone for your meeting)</span></label>
<input type="text" name="timezone" id="timezone" size="30" list="tz" placeholder="Continent/Timezone" required>
<label for="date" class="name">Date</label>
<input type="date" name="date" id="date" size="20" placeholder="YYYY-MM-DD" pattern="[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])" required>
<label for="time" class="name">Time</label>
<input type="time" id="time" size="20" placeholder="HH:MM" pattern="[012][0-9]:[0-5][0-9]" required>
<fieldset>
<legend class="name">Repeat?</legend>
<input type="radio" name="repeat" id="repeat-never" value="" checked required><label for="repeat-never">Never</label>
<input type="radio" name="repeat" id="repeat-w" value="w"><label for="repeat-w">Weekly</label>
<input type="radio" name="repeat" id="repeat-b" value="b"><label for="repeat-b">Bi-weekly</label>
<input type="radio" name="repeat" id="repeat-t" value="t"><label for="repeat-t">Tri-weekly</label>
<input type="radio" name="repeat" id="repeat-q" value="q"><label for="repeat-q">Quad-weekly</label>
</fieldset>
<label for="title-field" class="name">Title <span class="hint">(optional)</span></label>
<input type="text" name="title" id="title-field" size="30" placeholder="My awesome meeting">
<label for="url-field" class="name">Meeting URL<span class="hint">(optional)</span></label>
<input type="text" name="url" id="url-field" size="30" placeholder="https://example.com/mymeeting">
<input type="submit" value="Go to URL for new meeting">
</form>
<datalist id="tz">
<option>UTC</option>
</datalist>
</section>
<footer>
<p>Please <a href="https://github.com/sponsors/djc">sponsor</a> continued maintenance</p>
<p>
<a class="edit">Use as template</a> |
Created by <a href="http://dirkjan.ochtman.nl/">Dirkjan Ochtman</a> |
<a href="https://github.com/djc/awmy/">Feedback welcome</a>
</p>
</footer>
</div>
<script>
var ZONES = {{ zones }};
var RULES = {{ rules }};
function parseURL(url) {
var a = document.createElement('a');
a.href = url;
return {
source: url,
protocol: a.protocol.replace(':',''),
host: a.hostname,
port: a.port,
query: a.search,
params: (function(){
var ret = {}, s = {};
var seg = a.search.replace(/^\?/,'').split('&');
for (var i = 0; i < seg.length; i++) {
if (!seg[i]) { continue; }
s = seg[i].split('=');
ret[s[0]] = s[1];
}
return ret;
})(),
file: (a.pathname.match(/\/([^\/?#]+)$/i) || [,''])[1],
hash: a.hash.replace('#', ''),
path: a.pathname.replace(/^([^\/])/, '/$1'),
relative: (a.href.match(/tps ? : \/\/[^\/]+(.+)/) || [, ''])[1],
segments: a.pathname.replace(/^\//, '').split('/')
};
}
function pad(x) {
if (x >= 0) {
return x < 10 ? '0' + x : x.toString();
} else {
return x < -9 ? x : '-0' + Math.abs(x);
}
}
var scales = {
'year': 365 * 24 * 60 * 60,
'month': 30 * 24 * 60 * 60,
'week': 7 * 24 * 60 * 60,
'day': 24 * 60 * 60,
'hour': 60 * 60,
'minute': 60,
'second': 1
};
function relTime(x, y) {
var delta = Math.floor((y.getTime() - x.getTime()) / 1000);
if (delta < 0) {
return 'in the past';
}
for (unit in scales) {
var s = scales[unit];
var n = delta / s;
if ((unit == 'hour') && (n < 12)) {
var h = Math.floor(n);
var m = Math.floor(n % 1 * 60);
var s = Math.floor(n % (1 / 60) * 3600);
var str = h + ':' + pad(m) + ':' + pad(s);
return str + ' from now';
}
if ((n >= 2) || (s == 1)) {
var str = Math.floor(n) + ' ' + unit + (n > 1 ? 's' : '');
return str + ' from now';
}
}
}
function refresh(d) {
var relString = relTime(new Date(), d);
document.querySelector('span#delta').textContent = '(' + relString + ')';
}
var DAYS = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
var MONTHS = [
'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'
];
function format(d, offset) {
d = new Date(d.getTime() + offset * 60 * 1000);
var wd = d.getUTCDay();
var dn = d.getUTCDate();
var m = d.getUTCMonth();
var y = d.getUTCFullYear();
var H = d.getUTCHours();
var M = d.getUTCMinutes();
var S = d.getUTCSeconds();
var dstr = dn.toString();
var last = parseInt(dstr.substr(dstr.length - 1, 1), 10);
if (parseInt(dstr, 10) >= 7 && parseInt(dstr, 10) < 20) {
var suffix = 'th';
} else if (last == 1) {
suffix = 'st';
} else if (last == 2) {
suffix = 'nd';
} else if (last == 3) {
suffix = 'rd';
} else {
suffix = 'th';
}
var ds = DAYS[wd] + ', ' + dn + suffix + ' ' + MONTHS[m] + ', ';
var ts = pad(H) + ':' + pad(M);
var zone = '';
if (offset) {
var delta = pad(offset / 60) + ':' + pad(offset % 60);
zone = (offset > 0 ? '+' : '') + delta;
zone = zone.substr(0, 1) + ' ' + zone.substr(1);
}
return [ds + ts, zone];
}
function digit(s) {
var c = s.charCodeAt(0);
return (c > 47) && (c < 58);
}
function capitalize(s) {
return s.substr(0, 1).toUpperCase() + s.substr(1).toLowerCase();
}
function procLiteral(ds, ts) {
var dbits = ds.split('-');
var d = new Date();
d.setUTCFullYear(dbits[0]);
d.setUTCMonth(dbits[1] - 1, dbits[2]);
var tbits = ts.split(':');
d.setUTCHours(tbits[0]);
d.setUTCMinutes(tbits[1]);
d.setUTCSeconds(0);
return d;
}
function procWeekly(bits) {
var day = bits[0].length > 3 ? bits[0].substr(1) : bits[0];
var idx = DAYS.indexOf(capitalize(day));
var now = new Date(Date.now());
now.setUTCSeconds(0);
var t = pad(now.getUTCHours()) + ':' + pad(now.getUTCMinutes());
if ((now.getUTCDay() != idx) || (t >= bits[1])) {
var diff = (idx - now.getUTCDay()) % 7;
diff = diff <= 0 ? diff + 7 : diff;
now = new Date(now.getTime() + diff * 24 * 60 * 60 * 1000);
}
var tbits = bits[1].split(':');
now.setUTCHours(tbits[0]);
now.setUTCMinutes(tbits[1]);
return now;
}
var PARTS = ["Europe", "Australia", "Africa", "Asia", "Antarctica", "Indian", "Atlantic", "Pacific", "America"];
var LOCAL = {};
for (var key in ZONES) {
var local = key.split('/')[1];
LOCAL[local.toLowerCase()] = key;
}
function canonicalZone(zone) {
if (zone === 'UTC') return zone;
zone = zone.replace(' ', '_');
zone = LOCAL[zone.toLowerCase()] || zone;
if (ZONES[zone].length > 1) {
alert('This code has not been tested! (zone-multi)');
}
return zone;
}
function zoneOffset(zone, d) {
if (zone == 'UTC') {
return 0;
}
var active = ZONES[zone][ZONES[zone].length - 1];
var zoneoff = active.o;
console.log('ZONE-OFFSET: ' + zoneoff);
d = new Date(d.getTime() - zoneoff * 1000);
var changes = [];
var y = d.getUTCFullYear();
var dstoff = 0;
for (var i in RULES[active.r]) {
console.log('RULE: ' + JSON.stringify(RULES[active.r][i]));
var rule = RULES[active.r][i];
if (parseInt(rule[0], 10) > y) {
continue;
}
if (rule[1] != 'max' && parseInt(rule[1], 10) < y) {
continue;
}
if (rule[2] != '-') {
alert('This code has not been tested! (year-type)');
}
// Months handling
var rm = MONTHS.indexOf(rule[3]) + 1;
var m = d.getUTCMonth() + 1;
console.log('COMPARE: ' + m + ' ~ ' + rm);
if (m < rm) {
continue;
} else if (m > rm) {
dstoff = rule[6];
console.log('DST-OFFSET: ' + dstoff);
continue;
}
// Find the transition day
var cur = new Date(Date.UTC(y, m - 1, 1, 0, 0));
console.log('FIRST: ' + cur);
var wd = cur.getUTCDay();
if (rule[4].substr(0, 4) == 'last') {
var idx = 40;
var target = DAYS.indexOf(rule[4].substr(4));
} else {
var parts = rule[4].split('>=');
idx = parseInt(parts[1], 10);
target = DAYS.indexOf(parts[0]);
}
console.log('IDX: ' + idx + ' TARGET: ' + target);
if (wd != target) {
cur = new Date(cur.getTime() + 86400 * (7 - wd) * 1000);
}
console.log('MOVED-DAY: ' + cur);
while (cur.getUTCMonth() == m - 1 && cur.getUTCDate() < idx) {
cur = new Date(cur.getTime() + 86400 * 7 * 1000);
console.log('LOOPED: ' + cur);
}
if (cur.getUTCMonth() == m) {
cur = new Date(cur.getTime() - 86400 * 7 * 1000);
console.log('WOUND-BACK: ' + cur);
}
console.log('TRANS-DAY: ' + cur);
console.log('COMPARE-DAYS: ' + d.getUTCDate() + ' ~ ' + cur.getUTCDate());
if (d.getUTCDate() < cur.getUTCDate()) {
continue;
} else if (d.getUTCDate() > cur.getUTCDate()) {
dstoff = rule[6];
console.log('DST-OFFSET: ' + dstoff);
continue;
}
// Find the transition time
var ttime = rule[5];
console.log('FLOO: ' + ttime.charAt(ttime.length - 1));
if (['w', 'u', 's'].indexOf(ttime.charAt(ttime.length - 1)) >= 0) {
var type = ttime.charAt(ttime.length - 1);
ttime = ttime.substr(0, ttime.length - 1);
} else {
type = 'w';
}
console.log('TIME-TYPE: ' + ttime + ' ' + type);
parts = ttime.split(':');
var sdiff = parseInt(parts[0], 10) * 3600;
if (parts.length > 1) {
sdiff += parseInt(parts[1], 10) * 60;
if (parts.length > 2) {
sdiff += parseInt(parts[2], 10) * 60;
}
}
if (type == 'u') {
cur = new Date(cur.getTime() + sdiff * 1000);
} else if (type == 's') {
cur = new Date(cur.getTime() + (sdiff - zoneoff) * 1000);
} else {
cur = new Date(cur.getTime() + (sdiff - zoneoff - dstoff) * 1000);
}
console.log('TRANS-TIME: ' + cur);
console.log('MEETING-TIME: ' + d);
if (d.getTime() < cur.getTime()) {
continue;
} else {
dstoff = rule[6];
console.log('DST-OFFSET: ' + dstoff);
continue;
}
// Still moderately fucked up at transition time
// Particularly when transition is forward?
}
return zoneoff + dstoff;
}
function repeatDays(d, n, zone) {
var now = new Date();
var offset = zoneOffset(zone, now);
var zonedNow = now.getTime() + offset * 1000;
// Time in repeat units from current time to scheduled time
// (If < 0, need to jump forwards; > 1, then jump backwards.)
var unit = 86400 * n * 1000;
var diff = (d.getTime() - zonedNow) / unit;
console.log("DIFF: " + (d.getTime() - zonedNow) / 3600000 + " in units: " + unit);
var move = (diff < 0 || diff > 1) ? -Math.floor(diff) : 0;
return new Date(d.getTime() + move * unit);
}
function oldWeek(x) {
return x.charAt(0) == 'W' && x.length == 4 && x[0] != 'Wake';
}
function newWeek(x) {
return DAYS.indexOf(capitalize(x)) >= 0;
}
function stringFromUrlPath(path) {
return path.replace(/(%20|_)+/g, ' ');
}
function hashString(s) {
var hash = 0;
if (s.length == 0) return hash;
for (i = 0; i < s.length; i++) {
hash = ((hash << 5) - hash) + s.charCodeAt(i);
hash = hash & hash;
}
return Math.abs(hash).toString(32);
}
function showInfo(url) {
var urlparts = parseURL(url);
var bits = urlparts.path.split('/');
bits.shift();
if (bits.length > 1) {
document.querySelector('a.edit').textContent = 'Use as template';
} else {
document.querySelector('section').removeAttribute('hidden');
document.location = '#form';
return;
}
// Extract data from URL
var restrict = null;
if (newWeek(bits[0])) {
bits = ['UTC'].concat(bits);
} else if (digit(bits[0])) {
bits = ['UTC'].concat(bits);
} else if (oldWeek(bits[0])) {
bits = ['UTC'].concat(bits);
bits[1] = procWeekly(bits.slice(1, 3)).toISOString().substr(0, 10);
restrict = 'w';
} else {
if (PARTS.indexOf(bits[0]) >= 0) {
var zone = decodeURIComponent(bits[0]) + '/' + decodeURIComponent(bits[1]).replace(' ', '_');
bits = [canonicalZone(zone)].concat(bits.slice(2));
} else {
bits[0] = canonicalZone(decodeURIComponent(bits[0]));
}
}
console.log('BITS', JSON.stringify(bits));
// Calculate date value from URL data
var next = 1;
if (newWeek(bits[next])) {
var ds = procWeekly(bits.slice(next, next + 2)).toISOString().substr(0, 10);
var d = procLiteral(ds, bits[next + 1]);
restrict = 'w';
} else {
d = procLiteral(bits[next], bits[next + 1]);
}
console.log('DATE', d);
// Apply repetitions to get future date
var mode = null;
next += 2;
if (bits[next] == 'w') {
d = repeatDays(d, 7, bits[0]);
next += 1;
mode = 'w';
} else if (bits[next] == 'b') {
d = repeatDays(d, 14, bits[0]);
next += 1;
mode = 'b';
} else if (bits[next] == 't') {
d = repeatDays(d, 21, bits[0]);
next += 1;
mode = 't';
} else if (bits[next] == 'q') {
d = repeatDays(d, 28, bits[0]);
next += 1;
mode = 'q';
} else {
bits.splice(next, 0, null);
next += 1;
}
// Decode extradata
var extra = null;
if (urlparts.hash) {
try {
extra = JSON.parse(atob(urlparts.hash));
} catch (e) {
extra = null;
}
}
// Apply necessary offset
var offset = zoneOffset(bits[0], d);
d = new Date(d.getTime() - offset * 1000);
// Show results in document
var para = document.querySelector('p#local');
var local = format(d, -d.getTimezoneOffset());
para.querySelector('span.val').textContent = local[0];
var label = para.querySelector('span#your');
if (mode) {
label.textContent = 'Next occurrence, your time (UTC ' + local[1] + '):';
} else {
label.textContent = 'Your time (UTC ' + local[1] + '):';
}
para.style.display = 'block';
var ref = format(d, offset / 60);
document.querySelector('p#ref span.val').textContent = ref[0];
if (bits[0] == 'UTC') {
var text = '(in UTC)';
} else {
text = '(in timezone ' + bits[0].replace('_', ' ') + ', UTC ' + ref[1] + ')';
}
document.querySelector('p#ref span#zone').textContent = text;
document.querySelector('p#ref').style.display = 'block';
var title = decodeURIComponent(bits.slice(next).join('/'));
if (title != 'undefined') {
document.getElementById('title').textContent = title;
document.getElementById('title').style.display = 'block';
document.title = title + ' - Are we meeting yet?';
}
var meetingurl = extra && extra.url;
if (meetingurl && meetingurl.startsWith("http")) {
document.getElementById('url').setAttribute('href', meetingurl);
document.getElementById('url').style.display = 'block';
} else {
document.getElementById('url').style.display = '';
}
// Build iCal event
function iCalDate(d) {
return d.toISOString().replace(/[-:]+/g, '').substr(0, 15);
}
var specDate = new Date(d.getTime() + offset * 1000);
if (bits[0] === 'UTC') {
var iCalStart = ':' + iCalDate(specDate) + 'Z';
} else {
iCalStart = ';TZID=' + bits[0] + ':' + iCalDate(specDate);
}
var iCalLines = [
'BEGIN:VCALENDAR',
'VERSION:2.0',
'PRODID:-//XavaMedia//arewemeetingyet.com//EN',
'BEGIN:VEVENT',
'UID:' + hashString(JSON.stringify(bits)) + '@arewemeetingyet.com',
'DTSTAMP:' + iCalDate(new Date()) + 'Z',
'DTSTART' + iCalStart,
'SUMMARY:' + title,
meetingurl ? 'ATTACH:' + meetingurl : "",
'END:VEVENT',
'END:VCALENDAR'
].filter(Boolean);
if (mode) {
var iCalInterval = {'w': '', 'b': ';INTERVAL=2', 't': ';INTERVAL=3', 'q': ';INTERVAL=4'}
var iCalRule = 'RRULE:FREQ=WEEKLY' + iCalInterval[mode];
iCalLines.splice(6, 0, iCalRule);
}
var iCalData = iCalLines.join('\r\n') + '\r\n';
var iCalLink = document.getElementById('ical');
iCalLink.href = 'data:text/calendar;base64,' + btoa(iCalData);
iCalLink.title = "iCalendar event for '" + title + "'";
// Set values in form for editing
bits = parseURL(url).path.split('/');
bits.shift();
document.getElementById('timezone').setAttribute('value', stringFromUrlPath(bits[0]));
document.getElementById('date').setAttribute('value', bits[1]);
document.getElementById('time').setAttribute('value', (bits[2].length < 5 ? '0' : '') + bits[2]);
if (bits.length === 5 && /^[wbt]$/.test(bits[3])) {
document.getElementById('repeat-' + bits[3]).checked = true;
}
document.getElementById('title-field').setAttribute('value', title);
document.getElementById('url-field').setAttribute('value', meetingurl || "");
// Warn about data which is only valid in repeating mode
if (restrict && mode !== restrict) {
alert('Weekdays are only valid for weekly repeating.');
}
refresh(d);
window.setInterval(refresh, 100, d);
}
showInfo(document.location);
window.addEventListener("hashchange", function() {
showInfo(document.location);
});
(function($) {
'use strict';
// add timezones
var options = document.getElementById('tz');
Object.keys(ZONES).sort().forEach(function(key) {
let textContent = document.createTextNode(key);
let node = document.createElement('option');
node.appendChild(textContent);
options.appendChild(node);
});
// create URL when form submitted
document.querySelector('form').addEventListener('submit', function(event) {
event.preventDefault();
// construct URL
var form = this,
URL = '/',
params = ['timezone', 'date', 'time', 'title'],
linkElement;
params = params.map(function(name) {
return form.elements[name].value;
}).filter(function(value) {
return !!value;
});
var repeat = '';
for (var i in form.elements['repeat']) {
var f = form.elements['repeat'][i];
if (f.checked) {
repeat = f.value;
break;
}
}
if (repeat) {
params.splice(3, 0, [repeat]);
}
// keep the timezone, lose the continent
params[0] = params[0].replace(/^.*\/(.*)$/, '$1');
// replace spaces with underscore in timezone
params[0] = params[0].replace('_', ' ');
// encode all params and append to URL
URL += params
.map(encodeURIComponent)
.join('/')
// replace %3A with ':' (%3A not handled)
.replace(/%3A/g, ':');
// optional extra params that make the url ugly
var extra = {};
if (form.elements.url.value) {
extra.url = form.elements.url.value;
}
if (Object.keys(extra).length) {
URL += "#" + btoa(JSON.stringify(extra));
}
// goto URL
location.href = URL;
return false;
});
// hide form behind button
document.querySelector('a.edit').addEventListener('click', function() {
document.querySelector('section').removeAttribute('hidden');
document.location = '#form';
});
}());
// check time format
document.getElementById('time').addEventListener('change', function() {
// append :00 minutes to 2-digit entry
var timeInput = document.getElementById('time');
if (/^\d\d$/.test(timeInput.value)) {
timeInput.value += ':00';
}
if (timeInput.value > '21' || timeInput.value < '06') {
alert("Meeting planned during reference timezone's night, are you sure?");
}
});
</script>
</body>
</html>