Archive commit

src/ts/components/services/installService.ts

@@ -0,0 +1,41 @@
+import { Injectable } from '@angular/core';
+import { StorageService } from './storageService';
+
+interface InstallEvent extends Event {
+	prompt(): void;
+	userChoice: Promise<'accepted' | 'dismissed'>;
+}
+
+@Injectable({
+	providedIn: 'root',
+})
+export class InstallService {
+	private installEvent?: InstallEvent;
+	constructor(private storage: StorageService) {
+		if (!this.storage.getBoolean('install-dismissed')) {
+			window.addEventListener('beforeinstallprompt', event => {
+				event.preventDefault();
+				this.installEvent = event as any;
+			});
+		}
+	}
+	get canInstall() {
+		return !!this.installEvent || (DEVELOPMENT && localStorage.getItem('install'));
+	}
+	install() {
+		if (!this.installEvent) {
+			return Promise.reject(new Error('Cannot install'));
+		}
+
+		this.installEvent.prompt();
+
+		return this.installEvent.userChoice
+			.finally(() => {
+				this.installEvent = undefined;
+			});
+	}
+	dismiss() {
+		this.installEvent = undefined;
+		this.storage.setBoolean('install-dismissed', true);
+	}
+}