Archive commit

src/ts/components/services/intervalUpdateService.ts

@@ -0,0 +1,44 @@
+import { Injectable, NgZone } from '@angular/core';
+import { removeItem } from '../../common/utils';
+
+@Injectable({
+	providedIn: 'root',
+})
+export class IntervalUpdateService {
+	private interval: any;
+	private actions: (() => void)[] = [];
+	constructor(private zone: NgZone) {
+	}
+	subscribe(action: () => void) {
+		this.actions.push(action);
+
+		if (!this.interval) {
+			this.zone.runOutsideAngular(() => {
+				this.interval = setInterval(() => {
+					this.actions.forEach(a => a());
+				}, 1000 * 10);
+			});
+		}
+
+		return () => {
+			removeItem(this.actions, action);
+
+			if (this.actions.length === 0) {
+				clearInterval(this.interval);
+				this.interval = undefined;
+			}
+		};
+	}
+	toggle(action: () => void) {
+		let unsubscribe: (() => void) | undefined;
+
+		return (on: boolean) => {
+			if (on && !unsubscribe) {
+				unsubscribe = this.subscribe(action);
+			} else if (!on && unsubscribe) {
+				unsubscribe();
+				unsubscribe = undefined;
+			}
+		};
+	}
+}