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index.js
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index.js
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import "babel-polyfill";
import { Interval, DateTime, Info } from "luxon";
import { LZMA } from "lzma/src/lzma_worker.js";
import html from "choo/html";
import choo from "choo";
function base64ToByteArray(base64) {
let raw = window.atob(base64);
let rawLength = raw.length;
let array = new Uint8Array(new ArrayBuffer(rawLength));
for (let i = 0; i < rawLength; i++) {
array[i] = raw.charCodeAt(i);
}
return array;
}
function stringToZip(string) {
return new Promise((resolve, reject) => {
LZMA.compress(string, 9, function(result, error) {
if (error) return reject(error);
let base64String = btoa(
String.fromCharCode.apply(null, new Uint8Array(result))
);
resolve(base64String);
});
});
}
function zipToString(data) {
return new Promise((resolve, reject) => {
let array = base64ToByteArray(data);
LZMA.decompress(array, function(result, error) {
if (!(typeof result === "string")) result = new Uint8Array(result);
if (error) return reject(error);
resolve(result);
});
});
}
let config = [
// {
// url: "http://wkcr.streamguys1.com/live",
// time: ["22:00", "PT1H21M"]
// },
// {
// url: "http://188.165.192.5:8242/kzschigh",
// time: ["22:00", "PT1H22M"]
// }
];
function updateConfig(val) {
config = val;
refreshConfigPromise();
stringToZip(JSON.stringify(config)).then(base64 => {
history.pushState(null, null, `#${base64}`);
});
window.config = config;
}
window.updateConfig = updateConfig;
window.stringToZip = stringToZip;
window.zipToString = zipToString;
let configUpdated;
let updateConfigPromise;
function refreshConfigPromise() {
if (configUpdated) configUpdated();
updateConfigPromise = new Promise(resolve => {
configUpdated = resolve;
});
}
refreshConfigPromise();
const wait = num =>
new Promise(resolve => {
setTimeout(resolve, num);
});
const toInterval = timeCfg => {
let start = DateTime.fromISO(timeCfg[0]);
if (timeCfg.length > 2) {
start = start.set({ weekday: timeCfg[2] });
}
return Interval.fromISO(`${start.toISO()}/${timeCfg[1]}`);
};
const renderText = ({ url, interval, time }) => {
let prefix = "every day";
if (time.length > 2) {
prefix = `${interval.start.weekdayLong}s`;
}
return `${prefix} from ${interval.start.toLocaleString(
DateTime.TIME_SIMPLE
)} to ${interval.end.toLocaleString(DateTime.TIME_SIMPLE)} ${url}`;
};
async function seek(emit) {
const now = DateTime.local();
const sortedConfig = config.sort((a, b) => a.time.length - b.time.length);
for (let i = 0; i < sortedConfig.length; i++) {
const { time, url } = sortedConfig[i];
const interval = toInterval(time);
if (time.length > 2 && time[2] !== now.weekday) {
continue;
}
if (interval.contains(now)) {
emit("play", sortedConfig[i]);
const { milliseconds } = interval.end.diff(now).toObject();
await wait(milliseconds);
emit("play", false);
seek(emit);
return;
}
}
await Promise.race([wait(60 * 1000), updateConfigPromise]);
seek(emit);
}
const app = choo();
function mainView(state, emit) {
return html`
<body>
${config.length
? html`<div>
<h1>${state.show ? renderText(state.show) : ""}</h1>
<audio src=${state.show ? state.show.url : ""}></audio>
${state.show
? html`<button onclick=${onplay}>${state.playing
? "pause"
: "play"}</button>`
: ""}
<h2>on deck:</h2>
<ul id="deck">${config
.map(show =>
Object.assign(
{
interval: toInterval(show.time)
},
show
)
)
.map(
show =>
html`<li>${renderText(
show
)} <a href="javascript://" data-url=${show.url} onclick=${ondelete}>🗑</a></li>`
)}</ul>
</div>`
: ""}
<hr>
<form onsubmit=${onadd}>
url: <input name="url" type="text" class="url-input">
day: <select name="day" class="day">${state.days.map(
({ label, value }) =>
html`<option value=${value}>${label}</option>`
)}</select>
start: <input name="start" type="time" class="start">
end: <input name="end" type="time" class="end">
<button id="add">add</button>
</form>
</body>
`;
function onplay(e) {
e.preventDefault();
emit("toggle");
}
function ondelete(e) {
emit("delete", e.target.dataset.url);
}
function onadd(e) {
e.preventDefault();
const { url, day, start, end } = e.target.elements;
emit("new", {
url: url.value,
day: day.value,
start: start.value,
end: end.value
});
}
}
function store(state, emitter) {
state.url = false;
state.playing = false;
state.days = [];
for (let i = 0; i <= 7; i++) {
state.days.push({
label: Info.weekdays()[i - 1] || "every day",
value: i
});
}
emitter.on("play", show => {
if (show) {
const interval = toInterval(show.time);
state.show = { ...show, interval };
} else {
state.show = false;
}
setTimeout(() => emitter.emit("toggle", !!state.show));
});
emitter.on("toggle", playPause => {
const player = document.querySelector("audio");
let play = player && player.paused ? true : false;
if (playPause !== undefined) {
play = playPause;
}
let promise;
if (play && player) {
promise = player.play();
} else if (player) {
player.pause();
promise = Promise.resolve();
}
if (promise) {
promise.then(() => {
state.playing = play;
emitter.emit("render");
});
}
});
emitter.on("new", ({ url, start, end, day }) => {
const startTime = DateTime.fromISO(start).setZone("utc");
const endTime = DateTime.fromISO(end).setZone("utc");
let diff = endTime.diff(startTime);
// if this is a negative diff, assume it crosses the day boundary?
if (diff < 0) {
diff = endTime.plus({ days: 1 }).diff(startTime);
}
const time = [startTime.toISOTime(), diff.toISO()];
if (day !== "0") {
time.push(parseInt(day, 10));
}
const cfg = {
url: url,
time
};
if (cfg.url && cfg.url.length && cfg.time.length) {
config.push(cfg);
updateConfig(config);
emitter.emit("render");
}
});
emitter.on("delete", url => {
const newConfig = config.filter(show => show.url !== url);
updateConfig(newConfig);
emitter.emit("render");
});
seek(emitter.emit.bind(emitter));
if (window.location.hash.length > 1) {
zipToString(window.location.hash.substring(1)).then(data => {
updateConfig(JSON.parse(data));
emitter.emit("render");
});
}
}
app.use(store);
app.route("*", mainView);
app.mount("body");