simplify
This commit is contained in:
Giancarmine Salucci
@@ -1,379 +1,371 @@
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/**
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* Client-side Push Notification Manager
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*
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*
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* Handles push notification subscription/unsubscription
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* and permission management in the browser.
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*
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*
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* SSR-Safe: All browser API access is guarded and lazily initialized
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*/
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import { browser } from '$app/environment';
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interface NotificationState {
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supported: boolean;
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permission: NotificationPermission;
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subscribed: boolean;
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loading: boolean;
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error: string | null;
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supported: boolean;
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permission: NotificationPermission;
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subscribed: boolean;
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loading: boolean;
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error: string | null;
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}
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class PushNotificationManager {
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private state: NotificationState = {
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supported: false,
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permission: 'default',
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subscribed: false,
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loading: false,
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error: null
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};
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private state: NotificationState = {
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supported: false,
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permission: 'default',
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subscribed: false,
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loading: false,
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error: null
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};
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private listeners: Array<(state: NotificationState) => void> = [];
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private registration: ServiceWorkerRegistration | null = null;
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private _clientId: string | null = null;
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private _initialized = false;
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private listeners: Array<(state: NotificationState) => void> = [];
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private registration: ServiceWorkerRegistration | null = null;
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private _clientId: string | null = null;
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private _initialized = false;
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constructor() {
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// SSR-safe constructor: no browser API access
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// Initialization happens lazily when needed
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}
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constructor() {
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// SSR-safe constructor: no browser API access
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// Initialization happens lazily when needed
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}
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/**
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* Lazy initialization - only runs in browser context
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*/
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private ensureInitialized(): void {
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if (this._initialized || !browser) return;
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this._initialized = true;
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this.checkSupport();
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this.initializeServiceWorker();
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}
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/**
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* Lazy initialization - only runs in browser context
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*/
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private ensureInitialized(): void {
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if (this._initialized || !browser) return;
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/**
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* Get clientId lazily - only generates in browser context
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*/
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private get clientId(): string {
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if (!this._clientId && browser) {
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this._clientId = this.generateClientId();
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}
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return this._clientId || 'ssr-fallback';
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}
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this._initialized = true;
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this.checkSupport();
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this.initializeServiceWorker();
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}
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/**
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* Subscribe to state changes
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*/
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onStateChange(callback: (state: NotificationState) => void): () => void {
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this.ensureInitialized(); // Ensure initialized before sending state
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this.listeners.push(callback);
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callback(this.state); // Send initial state
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return () => {
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this.listeners = this.listeners.filter(cb => cb !== callback);
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};
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}
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/**
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* Get clientId lazily - only generates in browser context
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*/
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private get clientId(): string {
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if (!this._clientId && browser) {
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this._clientId = this.generateClientId();
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}
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return this._clientId || 'ssr-fallback';
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}
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/**
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* Get current state
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*/
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getState(): NotificationState {
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this.ensureInitialized();
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return { ...this.state };
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}
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/**
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* Subscribe to state changes
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*/
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onStateChange(callback: (state: NotificationState) => void): () => void {
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this.ensureInitialized(); // Ensure initialized before sending state
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/**
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* Check if push notifications are supported
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* SSR-safe: guarded with browser check
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*/
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private checkSupport(): void {
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if (!browser) {
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this.state.supported = false;
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this.state.permission = 'denied';
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return;
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}
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this.state.supported = (
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'serviceWorker' in navigator &&
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'PushManager' in window &&
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'Notification' in window
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);
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this.state.permission = this.state.supported ? Notification.permission : 'denied';
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}
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this.listeners.push(callback);
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callback(this.state); // Send initial state
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/**
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* Initialize service worker registration
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* SSR-safe: guarded with browser and support checks
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*/
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private async initializeServiceWorker(): Promise<void> {
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if (!browser || !this.state.supported) return;
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return () => {
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this.listeners = this.listeners.filter((cb) => cb !== callback);
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};
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}
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try {
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// Wait for service worker to be ready
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this.registration = await navigator.serviceWorker.ready;
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console.log('[PushManager] Service worker ready');
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// Check if already subscribed
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const subscription = await this.registration.pushManager.getSubscription();
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this.state.subscribed = !!subscription;
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this.notifyListeners();
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} catch (error) {
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console.error('[PushManager] Service worker initialization failed:', error);
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this.state.error = 'Service worker not available';
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this.notifyListeners();
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}
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}
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/**
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* Get current state
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*/
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getState(): NotificationState {
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this.ensureInitialized();
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return { ...this.state };
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}
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/**
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* Request notification permission
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*/
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async requestPermission(): Promise<boolean> {
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this.ensureInitialized();
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if (!browser || !this.state.supported) {
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this.state.error = 'Push notifications not supported';
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this.notifyListeners();
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return false;
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}
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/**
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* Check if push notifications are supported
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* SSR-safe: guarded with browser check
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*/
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private checkSupport(): void {
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if (!browser) {
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this.state.supported = false;
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this.state.permission = 'denied';
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return;
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}
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if (this.state.permission === 'granted') {
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return true;
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}
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this.state.supported =
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'serviceWorker' in navigator && 'PushManager' in window && 'Notification' in window;
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try {
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this.state.loading = true;
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this.notifyListeners();
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this.state.permission = this.state.supported ? Notification.permission : 'denied';
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}
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const permission = await Notification.requestPermission();
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this.state.permission = permission;
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this.state.error = permission === 'denied' ? 'Permission denied' : null;
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this.state.loading = false;
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this.notifyListeners();
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return permission === 'granted';
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} catch (error) {
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console.error('[PushManager] Permission request failed:', error);
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this.state.error = 'Failed to request permission';
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this.state.loading = false;
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this.notifyListeners();
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return false;
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}
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}
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/**
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* Initialize service worker registration
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* SSR-safe: guarded with browser and support checks
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*/
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private async initializeServiceWorker(): Promise<void> {
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if (!browser || !this.state.supported) return;
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/**
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* Subscribe to push notifications
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*/
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async subscribe(): Promise<boolean> {
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if (!await this.requestPermission()) {
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return false;
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}
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try {
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// Wait for service worker to be ready
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this.registration = await navigator.serviceWorker.ready;
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console.log('[PushManager] Service worker ready');
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if (!this.registration) {
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this.state.error = 'Service worker not ready';
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this.notifyListeners();
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return false;
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}
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// Check if already subscribed
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const subscription = await this.registration.pushManager.getSubscription();
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this.state.subscribed = !!subscription;
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try {
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this.state.loading = true;
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this.state.error = null;
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this.notifyListeners();
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this.notifyListeners();
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} catch (error) {
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console.error('[PushManager] Service worker initialization failed:', error);
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this.state.error = 'Service worker not available';
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this.notifyListeners();
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}
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}
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// Get VAPID public key from server
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const vapidResponse = await fetch('/api/notifications/vapid-key');
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if (!vapidResponse.ok) {
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throw new Error('Failed to get VAPID key');
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}
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const { publicKey } = await vapidResponse.json();
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// Create push subscription
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const subscription = await this.registration.pushManager.subscribe({
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userVisibleOnly: true,
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applicationServerKey: this.urlBase64ToUint8Array(publicKey)
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});
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/**
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* Request notification permission
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*/
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async requestPermission(): Promise<boolean> {
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this.ensureInitialized();
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// Send subscription to server
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const subscribeResponse = await fetch('/api/notifications/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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subscription: subscription.toJSON(),
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clientId: this.clientId
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})
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});
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if (!browser || !this.state.supported) {
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this.state.error = 'Push notifications not supported';
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this.notifyListeners();
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return false;
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}
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if (!subscribeResponse.ok) {
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throw new Error('Failed to register subscription with server');
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}
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if (this.state.permission === 'granted') {
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return true;
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}
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this.state.subscribed = true;
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this.state.loading = false;
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this.notifyListeners();
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console.log('[PushManager] Successfully subscribed to push notifications');
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return true;
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try {
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this.state.loading = true;
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this.notifyListeners();
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} catch (error) {
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console.error('[PushManager] Subscription failed:', error);
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this.state.error = 'Failed to subscribe to notifications';
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this.state.loading = false;
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this.notifyListeners();
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return false;
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}
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}
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const permission = await Notification.requestPermission();
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this.state.permission = permission;
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this.state.error = permission === 'denied' ? 'Permission denied' : null;
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/**
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* Unsubscribe from push notifications
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*/
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async unsubscribe(): Promise<boolean> {
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if (!this.registration) {
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this.state.error = 'Service worker not ready';
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this.notifyListeners();
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return false;
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}
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this.state.loading = false;
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this.notifyListeners();
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try {
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this.state.loading = true;
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this.state.error = null;
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this.notifyListeners();
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return permission === 'granted';
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} catch (error) {
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console.error('[PushManager] Permission request failed:', error);
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this.state.error = 'Failed to request permission';
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this.state.loading = false;
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this.notifyListeners();
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return false;
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}
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}
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// Get current subscription
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const subscription = await this.registration.pushManager.getSubscription();
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if (subscription) {
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// Unsubscribe from push service
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await subscription.unsubscribe();
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// Remove from server
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await fetch('/api/notifications/subscribe', {
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method: 'DELETE',
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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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clientId: this.clientId
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})
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});
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}
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/**
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* Subscribe to push notifications
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*/
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async subscribe(): Promise<boolean> {
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if (!(await this.requestPermission())) {
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return false;
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}
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this.state.subscribed = false;
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this.state.loading = false;
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this.notifyListeners();
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console.log('[PushManager] Successfully unsubscribed from push notifications');
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return true;
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if (!this.registration) {
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this.state.error = 'Service worker not ready';
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this.notifyListeners();
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return false;
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}
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} catch (error) {
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console.error('[PushManager] Unsubscription failed:', error);
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this.state.error = 'Failed to unsubscribe from notifications';
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this.state.loading = false;
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this.notifyListeners();
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return false;
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}
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}
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try {
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this.state.loading = true;
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this.state.error = null;
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this.notifyListeners();
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/**
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* Toggle subscription state
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*/
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async toggleSubscription(): Promise<boolean> {
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if (this.state.subscribed) {
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return await this.unsubscribe();
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} else {
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return await this.subscribe();
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}
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}
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// Get VAPID public key from server
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const vapidResponse = await fetch('/api/notifications/vapid-key');
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if (!vapidResponse.ok) {
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throw new Error('Failed to get VAPID key');
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}
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/**
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* Generate unique client ID
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* SSR-safe: guarded with browser check, uses localStorage only in browser
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*/
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private generateClientId(): string {
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if (!browser) return '';
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const stored = localStorage.getItem('push-client-id');
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if (stored) return stored;
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const { publicKey } = await vapidResponse.json();
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const id = `client_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
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localStorage.setItem('push-client-id', id);
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return id;
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}
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// Create push subscription
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const subscription = await this.registration.pushManager.subscribe({
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userVisibleOnly: true,
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applicationServerKey: this.urlBase64ToUint8Array(publicKey)
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});
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/**
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* Convert URL-safe base64 string to Uint8Array
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* Enhanced with validation and error handling for VAPID keys
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* SSR-safe: uses window.atob only in browser context
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*/
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private urlBase64ToUint8Array(base64String: string): Uint8Array<ArrayBuffer> {
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if (!browser) {
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||||
return new Uint8Array(0);
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||||
}
|
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// Send subscription to server
|
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const subscribeResponse = await fetch('/api/notifications/subscribe', {
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method: 'POST',
|
||||
headers: {
|
||||
'Content-Type': 'application/json'
|
||||
},
|
||||
body: JSON.stringify({
|
||||
subscription: subscription.toJSON(),
|
||||
clientId: this.clientId
|
||||
})
|
||||
});
|
||||
|
||||
// Input validation
|
||||
if (!base64String || typeof base64String !== 'string') {
|
||||
console.error('[PushManager] Invalid VAPID key: empty or non-string');
|
||||
return new Uint8Array(0);
|
||||
}
|
||||
if (!subscribeResponse.ok) {
|
||||
throw new Error('Failed to register subscription with server');
|
||||
}
|
||||
|
||||
// Remove whitespace and validate format
|
||||
const cleanKey = base64String.trim();
|
||||
if (cleanKey.length === 0) {
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||||
console.error('[PushManager] Invalid VAPID key: empty string');
|
||||
return new Uint8Array(0);
|
||||
}
|
||||
this.state.subscribed = true;
|
||||
this.state.loading = false;
|
||||
this.notifyListeners();
|
||||
|
||||
// VAPID keys should be 65 characters (unpadded base64)
|
||||
if (cleanKey.length !== 65) {
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||||
console.warn(`[PushManager] VAPID key length ${cleanKey.length}, expected 65`);
|
||||
}
|
||||
console.log('[PushManager] Successfully subscribed to push notifications');
|
||||
return true;
|
||||
} catch (error) {
|
||||
console.error('[PushManager] Subscription failed:', error);
|
||||
this.state.error = 'Failed to subscribe to notifications';
|
||||
this.state.loading = false;
|
||||
this.notifyListeners();
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
try {
|
||||
// Add proper padding
|
||||
const padding = '='.repeat((4 - cleanKey.length % 4) % 4);
|
||||
const base64 = (cleanKey + padding)
|
||||
.replace(/-/g, '+')
|
||||
.replace(/_/g, '/');
|
||||
/**
|
||||
* Unsubscribe from push notifications
|
||||
*/
|
||||
async unsubscribe(): Promise<boolean> {
|
||||
if (!this.registration) {
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||||
this.state.error = 'Service worker not ready';
|
||||
this.notifyListeners();
|
||||
return false;
|
||||
}
|
||||
|
||||
// Validate base64 format before decoding
|
||||
const base64Regex = /^[A-Za-z0-9+\/]*={0,2}$/;
|
||||
if (!base64Regex.test(base64)) {
|
||||
throw new Error('Invalid base64 characters');
|
||||
}
|
||||
try {
|
||||
this.state.loading = true;
|
||||
this.state.error = null;
|
||||
this.notifyListeners();
|
||||
|
||||
const rawData = window.atob(base64);
|
||||
const outputArray = new Uint8Array(rawData.length);
|
||||
// Get current subscription
|
||||
const subscription = await this.registration.pushManager.getSubscription();
|
||||
|
||||
for (let i = 0; i < rawData.length; ++i) {
|
||||
outputArray[i] = rawData.charCodeAt(i);
|
||||
}
|
||||
if (subscription) {
|
||||
// Unsubscribe from push service
|
||||
await subscription.unsubscribe();
|
||||
|
||||
console.log(`[PushManager] Successfully decoded VAPID key (${outputArray.length} bytes)`);
|
||||
return outputArray;
|
||||
// Remove from server
|
||||
await fetch('/api/notifications/subscribe', {
|
||||
method: 'DELETE',
|
||||
headers: {
|
||||
'Content-Type': 'application/json'
|
||||
},
|
||||
body: JSON.stringify({
|
||||
clientId: this.clientId
|
||||
})
|
||||
});
|
||||
}
|
||||
|
||||
} catch (error) {
|
||||
const errorMessage = error instanceof Error ? error.message : String(error);
|
||||
console.error('[PushManager] Failed to decode VAPID key:', error, 'Key:', cleanKey);
|
||||
throw new Error(`Invalid VAPID key format: ${errorMessage}`);
|
||||
}
|
||||
}
|
||||
this.state.subscribed = false;
|
||||
this.state.loading = false;
|
||||
this.notifyListeners();
|
||||
|
||||
/**
|
||||
* Notify all listeners of state change
|
||||
*/
|
||||
private notifyListeners(): void {
|
||||
this.listeners.forEach(callback => {
|
||||
try {
|
||||
callback({ ...this.state });
|
||||
} catch (error) {
|
||||
console.error('[PushManager] Listener error:', error);
|
||||
}
|
||||
});
|
||||
}
|
||||
console.log('[PushManager] Successfully unsubscribed from push notifications');
|
||||
return true;
|
||||
} catch (error) {
|
||||
console.error('[PushManager] Unsubscription failed:', error);
|
||||
this.state.error = 'Failed to unsubscribe from notifications';
|
||||
this.state.loading = false;
|
||||
this.notifyListeners();
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Toggle subscription state
|
||||
*/
|
||||
async toggleSubscription(): Promise<boolean> {
|
||||
if (this.state.subscribed) {
|
||||
return await this.unsubscribe();
|
||||
} else {
|
||||
return await this.subscribe();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Generate unique client ID
|
||||
* SSR-safe: guarded with browser check, uses localStorage only in browser
|
||||
*/
|
||||
private generateClientId(): string {
|
||||
if (!browser) return '';
|
||||
|
||||
const stored = localStorage.getItem('push-client-id');
|
||||
if (stored) return stored;
|
||||
|
||||
const id = `client_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
|
||||
localStorage.setItem('push-client-id', id);
|
||||
return id;
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert URL-safe base64 string to Uint8Array
|
||||
* Enhanced with validation and error handling for VAPID keys
|
||||
* SSR-safe: uses window.atob only in browser context
|
||||
*/
|
||||
private urlBase64ToUint8Array(base64String: string): Uint8Array<ArrayBuffer> {
|
||||
if (!browser) {
|
||||
return new Uint8Array(0);
|
||||
}
|
||||
|
||||
// Input validation
|
||||
if (!base64String || typeof base64String !== 'string') {
|
||||
console.error('[PushManager] Invalid VAPID key: empty or non-string');
|
||||
return new Uint8Array(0);
|
||||
}
|
||||
|
||||
// Remove whitespace and validate format
|
||||
const cleanKey = base64String.trim();
|
||||
if (cleanKey.length === 0) {
|
||||
console.error('[PushManager] Invalid VAPID key: empty string');
|
||||
return new Uint8Array(0);
|
||||
}
|
||||
|
||||
// VAPID keys should be 65 characters (unpadded base64)
|
||||
if (cleanKey.length !== 65) {
|
||||
console.warn(`[PushManager] VAPID key length ${cleanKey.length}, expected 65`);
|
||||
}
|
||||
|
||||
try {
|
||||
// Add proper padding
|
||||
const padding = '='.repeat((4 - (cleanKey.length % 4)) % 4);
|
||||
const base64 = (cleanKey + padding).replace(/-/g, '+').replace(/_/g, '/');
|
||||
|
||||
// Validate base64 format before decoding
|
||||
const base64Regex = /^[A-Za-z0-9+\/]*={0,2}$/;
|
||||
if (!base64Regex.test(base64)) {
|
||||
throw new Error('Invalid base64 characters');
|
||||
}
|
||||
|
||||
const rawData = window.atob(base64);
|
||||
const outputArray = new Uint8Array(rawData.length);
|
||||
|
||||
for (let i = 0; i < rawData.length; ++i) {
|
||||
outputArray[i] = rawData.charCodeAt(i);
|
||||
}
|
||||
|
||||
console.log(`[PushManager] Successfully decoded VAPID key (${outputArray.length} bytes)`);
|
||||
return outputArray;
|
||||
} catch (error) {
|
||||
const errorMessage = error instanceof Error ? error.message : String(error);
|
||||
console.error('[PushManager] Failed to decode VAPID key:', error, 'Key:', cleanKey);
|
||||
throw new Error(`Invalid VAPID key format: ${errorMessage}`);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Notify all listeners of state change
|
||||
*/
|
||||
private notifyListeners(): void {
|
||||
this.listeners.forEach((callback) => {
|
||||
try {
|
||||
callback({ ...this.state });
|
||||
} catch (error) {
|
||||
console.error('[PushManager] Listener error:', error);
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
// Singleton instance
|
||||
export const pushNotificationManager = new PushNotificationManager();
|
||||
|
||||
export type { NotificationState };
|
||||
export type { NotificationState };
|
||||
|
||||
Reference in New Issue
Block a user