Initial commit

com.pdma.notion-timer.sdPlugin/ui/libs/timers.js

@@ -0,0 +1,95 @@
+/* global ESDTimerWorker */
+/*eslint no-unused-vars: "off"*/
+/*eslint-env es6*/
+
+let ESDTimerWorker = new Worker(URL.createObjectURL(
+	new Blob([timerFn.toString().replace(/^[^{]*{\s*/, '').replace(/\s*}[^}]*$/, '')], {type: 'text/javascript'})
+));
+ESDTimerWorker.timerId = 1;
+ESDTimerWorker.timers = {};
+const ESDDefaultTimeouts = {
+	timeout: 0,
+	interval: 10
+};
+
+Object.freeze(ESDDefaultTimeouts);
+
+function _setTimer(callback, delay, type, params) {
+	const id = ESDTimerWorker.timerId++;
+	ESDTimerWorker.timers[id] = {callback, params};
+	ESDTimerWorker.onmessage = (e) => {
+		if (ESDTimerWorker.timers[e.data.id]) {
+			if (e.data.type === 'clearTimer') {
+				delete ESDTimerWorker.timers[e.data.id];
+			} else {
+				const cb = ESDTimerWorker.timers[e.data.id].callback;
+				if (cb && typeof cb === 'function') cb(...ESDTimerWorker.timers[e.data.id].params);
+			}
+		}
+	};
+	ESDTimerWorker.postMessage({type, id, delay});
+	return id;
+}
+
+function _setTimeoutESD(...args) {
+	let [callback, delay = 0, ...params] = [...args];
+	return _setTimer(callback, delay, 'setTimeout', params);
+}
+
+function _setIntervalESD(...args) {
+	let [callback, delay = 0, ...params] = [...args];
+	return _setTimer(callback, delay, 'setInterval', params);
+}
+
+function _clearTimeoutESD(id) {
+	ESDTimerWorker.postMessage({type: 'clearTimeout', id}); //     ESDTimerWorker.postMessage({type: 'clearInterval', id}); = same thing
+	delete ESDTimerWorker.timers[id];
+}
+
+window.setTimeout = _setTimeoutESD;
+window.setInterval = _setIntervalESD;
+window.clearTimeout = _clearTimeoutESD; //timeout and interval share the same timer-pool
+window.clearInterval = _clearTimeoutESD;
+
+/** This is our worker-code
+ *  It is executed in it's own (global) scope
+ *  which is wrapped above @ `let ESDTimerWorker`
+ */
+
+function timerFn() {
+	/*eslint indent: ["error", 4, { "SwitchCase": 1 }]*/
+
+	let timers = {};
+	let debug = false;
+	let supportedCommands = ['setTimeout', 'setInterval', 'clearTimeout', 'clearInterval'];
+
+	function log(e) {
+		console.log('Worker-Info::Timers', timers);
+	}
+
+	function clearTimerAndRemove(id) {
+		if (timers[id]) {
+			if (debug) console.log('clearTimerAndRemove', id, timers[id], timers);
+			clearTimeout(timers[id]);
+			delete timers[id];
+			postMessage({type: 'clearTimer', id: id});
+			if (debug) log();
+		}
+	}
+
+	onmessage = function (e) {
+		// first see, if we have a timer with this id and remove it
+		// this automatically fulfils clearTimeout and clearInterval
+		supportedCommands.includes(e.data.type) && timers[e.data.id] && clearTimerAndRemove(e.data.id);
+		if (e.data.type === 'setTimeout') {
+			timers[e.data.id] = setTimeout(() => {
+				postMessage({id: e.data.id});
+				clearTimerAndRemove(e.data.id); //cleaning up
+			}, Math.max(e.data.delay || 0));
+		} else if (e.data.type === 'setInterval') {
+			timers[e.data.id] = setInterval(() => {
+				postMessage({id: e.data.id});
+			}, Math.max(e.data.delay || ESDDefaultTimeouts.interval));
+		}
+	};
+}