520 lines
19 KiB
JavaScript
520 lines
19 KiB
JavaScript
// Progressive Web App functionality
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// Handles service worker registration and PWA features
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class PWAManager {
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constructor() {
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this.swRegistration = null;
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this.vapidPublicKey = null;
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this.pushSubscription = null;
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this.init();
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}
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async init() {
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console.log('PWA: Initializing PWA Manager...');
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if ('serviceWorker' in navigator) {
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try {
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this.swRegistration = await navigator.serviceWorker.register('/sw.js');
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console.log('SW: Service Worker registered successfully');
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// Listen for updates
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this.swRegistration.addEventListener('updatefound', () => {
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console.log('SW: New version available');
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this.showUpdateNotification();
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});
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} catch (error) {
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console.log('SW: Service Worker registration failed:', error);
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}
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}
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// Setup PWA install prompt
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this.setupInstallPrompt();
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// Setup notifications (if enabled)
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this.setupNotifications();
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// Setup push notifications
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this.setupPushNotifications();
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// Show manual install option after 5 seconds if no prompt appeared and app not installed
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setTimeout(() => {
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if (!document.getElementById('pwa-install-btn') && !this.isInstalled()) {
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console.log('PWA: No install prompt appeared, showing manual install guide');
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this.showManualInstallButton();
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}
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}, 5000);
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}
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setupInstallPrompt() {
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let deferredPrompt;
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window.addEventListener('beforeinstallprompt', (e) => {
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console.log('PWA: beforeinstallprompt event fired');
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// Prevent Chrome 67 and earlier from automatically showing the prompt
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e.preventDefault();
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deferredPrompt = e;
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// Show custom install button
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this.showInstallButton(deferredPrompt);
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});
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window.addEventListener('appinstalled', () => {
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console.log('PWA: App was installed');
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this.hideInstallButton();
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});
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// Debug: Check if app is already installed
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if (this.isInstalled()) {
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console.log('PWA: App is already installed (standalone mode)');
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// Hide any existing install buttons
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this.hideInstallButton();
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} else {
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console.log('PWA: App is not installed, waiting for install prompt...');
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console.log('PWA: Current URL:', window.location.href);
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console.log('PWA: Display mode:', window.matchMedia('(display-mode: standalone)').matches ? 'standalone' : 'browser');
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console.log('PWA: User agent:', navigator.userAgent);
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}
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// Periodically check if app becomes installed (for cases where user installs via browser menu)
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setInterval(() => {
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if (this.isInstalled()) {
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this.hideInstallButton();
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}
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}, 2000);
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}
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showInstallButton(deferredPrompt) {
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// Don't show install button if app is already installed
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if (this.isInstalled()) {
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console.log('PWA: App already installed, skipping install button');
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return;
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}
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// Create install button
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const installBtn = document.createElement('button');
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installBtn.id = 'pwa-install-btn';
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installBtn.className = 'btn btn-primary btn-sm';
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installBtn.innerHTML = '<i class="fas fa-download"></i> Install App';
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installBtn.style.cssText = `
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position: fixed;
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bottom: 20px;
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right: 20px;
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z-index: 1000;
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box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
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`;
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installBtn.addEventListener('click', async () => {
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if (deferredPrompt) {
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deferredPrompt.prompt();
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const { outcome } = await deferredPrompt.userChoice;
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console.log('PWA: User response to install prompt:', outcome);
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deferredPrompt = null;
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this.hideInstallButton();
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}
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});
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document.body.appendChild(installBtn);
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}
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hideInstallButton() {
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const installBtn = document.getElementById('pwa-install-btn');
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if (installBtn) {
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installBtn.remove();
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}
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}
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showUpdateNotification() {
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// Show update available notification
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const notification = document.createElement('div');
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notification.className = 'alert alert-info alert-dismissible';
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notification.style.cssText = `
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position: fixed;
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top: 20px;
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right: 20px;
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z-index: 1050;
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max-width: 300px;
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`;
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notification.innerHTML = `
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<strong>Update Available!</strong><br>
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A new version of the app is ready.
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<button type="button" class="btn btn-sm btn-outline-info ms-2" id="update-btn">
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Update Now
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</button>
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<button type="button" class="btn-close" data-bs-dismiss="alert"></button>
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`;
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document.body.appendChild(notification);
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// Handle update
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document.getElementById('update-btn').addEventListener('click', () => {
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if (this.swRegistration && this.swRegistration.waiting) {
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this.swRegistration.waiting.postMessage({ type: 'SKIP_WAITING' });
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window.location.reload();
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}
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});
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}
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async setupNotifications() {
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// Check if notifications are supported and get permission
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if ('Notification' in window) {
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const permission = await this.requestNotificationPermission();
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console.log('Notifications permission:', permission);
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}
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}
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async requestNotificationPermission() {
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if (Notification.permission === 'default') {
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// Only request permission when user interacts with a relevant feature
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// For now, just return the current status
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return Notification.permission;
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}
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return Notification.permission;
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}
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// Show notification (if permission granted)
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showNotification(title, options = {}) {
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if (Notification.permission === 'granted') {
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const notification = new Notification(title, {
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icon: '/icons/icon-192x192.png',
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badge: '/icons/icon-72x72.png',
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tag: 'littleshop-admin',
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...options
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});
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// Auto-close after 5 seconds
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setTimeout(() => {
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notification.close();
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}, 5000);
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return notification;
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}
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}
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// Show manual install button for browsers that don't auto-prompt
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showManualInstallButton() {
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// Don't show install button if app is already installed
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if (this.isInstalled()) {
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console.log('PWA: App already installed, skipping manual install button');
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return;
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}
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console.log('PWA: Showing manual install button');
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const installBtn = document.createElement('button');
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installBtn.id = 'pwa-install-btn';
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installBtn.className = 'btn btn-primary btn-sm';
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installBtn.innerHTML = '<i class="fas fa-mobile-alt"></i> Install as App';
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installBtn.style.cssText = `
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position: fixed;
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bottom: 20px;
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right: 20px;
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z-index: 1000;
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box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
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`;
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installBtn.addEventListener('click', () => {
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const isChrome = navigator.userAgent.includes('Chrome');
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const isEdge = navigator.userAgent.includes('Edge');
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const isFirefox = navigator.userAgent.includes('Firefox');
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let instructions = 'To install this app:\\n\\n';
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if (isChrome || isEdge) {
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instructions += '1. Look for the install icon (⬇️) in the address bar\\n';
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instructions += '2. Or click the browser menu (⋮) → "Install LittleShop Admin"\\n';
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instructions += '3. Or check if there\'s an "Install app" option in the browser menu';
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} else if (isFirefox) {
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instructions += '1. Firefox doesn\'t support PWA installation yet\\n';
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instructions += '2. You can bookmark this page for easy access\\n';
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instructions += '3. Or use Chrome/Edge for the full PWA experience';
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} else {
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instructions += '1. Look for an install or "Add to Home Screen" option\\n';
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instructions += '2. Check your browser menu for app installation\\n';
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instructions += '3. Or bookmark this page for quick access';
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}
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alert(instructions);
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});
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document.body.appendChild(installBtn);
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}
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// Check if app is installed
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isInstalled() {
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return window.matchMedia('(display-mode: standalone)').matches ||
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window.navigator.standalone === true;
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}
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// Setup push notifications
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async setupPushNotifications() {
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if (!('serviceWorker' in navigator) || !('PushManager' in window)) {
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console.log('PWA: Push notifications not supported');
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return;
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}
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try {
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// Get VAPID public key from server
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await this.getVapidPublicKey();
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// Check if user is already subscribed
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await this.checkPushSubscription();
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// Simple logic: only show prompt if user is not subscribed
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if (!this.pushSubscription) {
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// Check if we've already asked this session
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if (!sessionStorage.getItem('pushNotificationPromptShown')) {
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this.showPushNotificationSetup();
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sessionStorage.setItem('pushNotificationPromptShown', 'true');
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}
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} else {
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console.log('PWA: User already subscribed to push notifications');
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}
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} catch (error) {
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console.error('PWA: Failed to setup push notifications:', error);
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}
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}
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async getVapidPublicKey() {
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try {
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const response = await fetch('/api/push/vapid-key');
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if (response.ok) {
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const data = await response.json();
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this.vapidPublicKey = data.publicKey;
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console.log('PWA: VAPID public key retrieved');
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} else {
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throw new Error('Failed to get VAPID public key');
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}
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} catch (error) {
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console.error('PWA: Error getting VAPID public key:', error);
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throw error;
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}
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}
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async checkPushSubscription() {
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if (!this.swRegistration) {
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return;
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}
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try {
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this.pushSubscription = await this.swRegistration.pushManager.getSubscription();
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if (this.pushSubscription) {
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console.log('PWA: User has active push subscription');
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} else {
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console.log('PWA: User is not subscribed to push notifications');
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}
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} catch (error) {
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console.error('PWA: Error checking push subscription:', error);
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}
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}
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async subscribeToPushNotifications() {
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if (!this.swRegistration || !this.vapidPublicKey) {
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throw new Error('Service worker or VAPID key not available');
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}
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try {
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// Check current permission status
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if (Notification.permission === 'denied') {
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throw new Error('Notification permission was denied. Please enable notifications in your browser settings.');
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}
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// Request notification permission if not already granted
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let permission = Notification.permission;
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if (permission === 'default') {
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permission = await Notification.requestPermission();
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}
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if (permission !== 'granted') {
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throw new Error('Notification permission is required for push notifications. Please allow notifications and try again.');
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}
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// Subscribe to push notifications
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const subscription = await this.swRegistration.pushManager.subscribe({
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userVisibleOnly: true,
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applicationServerKey: this.urlBase64ToUint8Array(this.vapidPublicKey)
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});
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// Send subscription to server
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const response = await fetch('/api/push/subscribe', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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},
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body: JSON.stringify({
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endpoint: subscription.endpoint,
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p256dh: btoa(String.fromCharCode(...new Uint8Array(subscription.getKey('p256dh')))),
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auth: btoa(String.fromCharCode(...new Uint8Array(subscription.getKey('auth'))))
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}),
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credentials: 'same-origin'
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});
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if (response.ok) {
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this.pushSubscription = subscription;
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console.log('PWA: Successfully subscribed to push notifications');
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this.hidePushNotificationSetup();
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return true;
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} else {
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throw new Error('Failed to save push subscription to server');
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}
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} catch (error) {
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console.error('PWA: Failed to subscribe to push notifications:', error);
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throw error;
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}
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}
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async unsubscribeFromPushNotifications() {
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if (!this.pushSubscription) {
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return true;
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}
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try {
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// Unsubscribe from push manager
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await this.pushSubscription.unsubscribe();
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// Notify server
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await fetch('/api/push/unsubscribe', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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},
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body: JSON.stringify({
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endpoint: this.pushSubscription.endpoint
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}),
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credentials: 'same-origin'
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});
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this.pushSubscription = null;
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console.log('PWA: Successfully unsubscribed from push notifications');
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return true;
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} catch (error) {
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console.error('PWA: Failed to unsubscribe from push notifications:', error);
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throw error;
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}
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}
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showPushNotificationSetup() {
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// Check if setup UI already exists
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if (document.getElementById('push-notification-setup')) {
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return;
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}
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const setupDiv = document.createElement('div');
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setupDiv.id = 'push-notification-setup';
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setupDiv.className = 'alert alert-info alert-dismissible';
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setupDiv.style.cssText = `
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position: fixed;
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top: 80px;
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right: 20px;
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z-index: 1050;
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max-width: 350px;
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`;
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setupDiv.innerHTML = `
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<div class="d-flex align-items-center">
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<i class="fas fa-bell me-2"></i>
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<div class="flex-grow-1">
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<strong>Push Notifications</strong><br>
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<small>Get notified of new orders and updates</small>
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</div>
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<div class="ms-2">
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<button type="button" class="btn btn-sm btn-primary" id="subscribe-push-btn">Enable</button>
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</div>
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</div>
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<button type="button" class="btn-close" data-bs-dismiss="alert"></button>
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`;
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document.body.appendChild(setupDiv);
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// Add event listener for subscribe button
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const subscribeBtn = document.getElementById('subscribe-push-btn');
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if (subscribeBtn) {
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subscribeBtn.addEventListener('click', async () => {
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subscribeBtn.disabled = true;
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subscribeBtn.innerHTML = '<i class="fas fa-spinner fa-spin me-1"></i>Subscribing...';
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try {
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await this.subscribeToPushNotifications();
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this.showNotification('Push notifications enabled!', {
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body: 'You will now receive notifications for new orders and updates.'
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});
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} catch (error) {
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console.error('PWA: Push subscription failed:', error);
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// Provide user-friendly error messages
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let userMessage = error.message;
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if (error.message.includes('permission')) {
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userMessage = 'Please allow notifications when your browser asks, then try again.';
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}
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alert('Failed to enable push notifications: ' + userMessage);
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subscribeBtn.disabled = false;
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subscribeBtn.innerHTML = 'Enable';
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}
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});
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}
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}
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hidePushNotificationSetup() {
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const setupDiv = document.getElementById('push-notification-setup');
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if (setupDiv) {
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setupDiv.remove();
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console.log('PWA: Push notification setup hidden');
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}
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}
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async sendTestNotification() {
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try {
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const response = await fetch('/api/push/test', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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},
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body: JSON.stringify({
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title: 'Test Notification',
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body: 'This is a test push notification from LittleShop Admin!'
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}),
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credentials: 'same-origin'
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});
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const result = await response.json();
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if (response.ok) {
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console.log('PWA: Test notification sent successfully');
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return true;
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} else {
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throw new Error(result.error || 'Failed to send test notification');
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}
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} catch (error) {
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console.error('PWA: Failed to send test notification:', error);
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throw error;
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}
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}
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// Helper function to convert VAPID key
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urlBase64ToUint8Array(base64String) {
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const padding = '='.repeat((4 - base64String.length % 4) % 4);
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const base64 = (base64String + padding)
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.replace(/\-/g, '+')
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.replace(/_/g, '/');
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const rawData = window.atob(base64);
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const outputArray = new Uint8Array(rawData.length);
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for (let i = 0; i < rawData.length; ++i) {
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outputArray[i] = rawData.charCodeAt(i);
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}
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return outputArray;
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}
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}
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// Initialize PWA Manager
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const pwaManager = new PWAManager();
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window.pwaManager = pwaManager;
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// Expose notification functions globally
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window.showNotification = (title, options) => pwaManager.showNotification(title, options);
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window.sendTestPushNotification = () => pwaManager.sendTestNotification();
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window.subscribeToPushNotifications = () => pwaManager.subscribeToPushNotifications();
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window.unsubscribeFromPushNotifications = () => pwaManager.unsubscribeFromPushNotifications(); |