feat:add Web Push notification system

src/lib/server/notifications.ts

@@ -0,0 +1,165 @@
+import { db } from './db';
+import { notification, notificationPreferences } from './db/schema';
+import type { NotificationInsert } from './db/schema';
+import { eq, and, desc } from 'drizzle-orm';
+import { nanoid } from 'nanoid';
+
+export type NotificationType = 'friend_request' | 'friend_accepted' | 'find_liked' | 'find_commented';
+
+export interface CreateNotificationData {
+	userId: string;
+	type: NotificationType;
+	title: string;
+	message: string;
+	data?: Record<string, unknown>;
+}
+
+export interface GetNotificationsOptions {
+	limit?: number;
+	offset?: number;
+	unreadOnly?: boolean;
+}
+
+export class NotificationService {
+	/**
+	 * Create a new notification record in the database
+	 */
+	async createNotification(data: CreateNotificationData): Promise<void> {
+		const notificationData: NotificationInsert = {
+			id: nanoid(),
+			userId: data.userId,
+			type: data.type,
+			title: data.title,
+			message: data.message,
+			data: data.data || null,
+			isRead: false
+		};
+
+		await db.insert(notification).values(notificationData);
+	}
+
+	/**
+	 * Check if user has notifications enabled for a specific type
+	 */
+	async shouldNotify(userId: string, type: NotificationType): Promise<boolean> {
+		const prefs = await db
+			.select()
+			.from(notificationPreferences)
+			.where(eq(notificationPreferences.userId, userId))
+			.limit(1);
+
+		// If no preferences exist, default to true
+		if (prefs.length === 0) {
+			return true;
+		}
+
+		const pref = prefs[0];
+
+		// Check if push is enabled and specific notification type is enabled
+		if (!pref.pushEnabled) {
+			return false;
+		}
+
+		switch (type) {
+			case 'friend_request':
+				return pref.friendRequests ?? true;
+			case 'friend_accepted':
+				return pref.friendAccepted ?? true;
+			case 'find_liked':
+				return pref.findLiked ?? true;
+			case 'find_commented':
+				return pref.findCommented ?? true;
+			default:
+				return true;
+		}
+	}
+
+	/**
+	 * Get user notifications with pagination and filtering
+	 */
+	async getUserNotifications(userId: string, options: GetNotificationsOptions = {}) {
+		const { limit = 20, offset = 0, unreadOnly = false } = options;
+
+		let query = db
+			.select()
+			.from(notification)
+			.where(eq(notification.userId, userId))
+			.orderBy(desc(notification.createdAt))
+			.limit(limit)
+			.offset(offset);
+
+		if (unreadOnly) {
+			query = db
+				.select()
+				.from(notification)
+				.where(and(eq(notification.userId, userId), eq(notification.isRead, false)))
+				.orderBy(desc(notification.createdAt))
+				.limit(limit)
+				.offset(offset);
+		}
+
+		return await query;
+	}
+
+	/**
+	 * Mark notifications as read
+	 */
+	async markAsRead(notificationIds: string[]): Promise<void> {
+		for (const id of notificationIds) {
+			await db
+				.update(notification)
+				.set({ isRead: true })
+				.where(eq(notification.id, id));
+		}
+	}
+
+	/**
+	 * Mark a single notification as read
+	 */
+	async markOneAsRead(notificationId: string): Promise<void> {
+		await db
+			.update(notification)
+			.set({ isRead: true })
+			.where(eq(notification.id, notificationId));
+	}
+
+	/**
+	 * Mark all notifications as read for a user
+	 */
+	async markAllAsRead(userId: string): Promise<void> {
+		await db
+			.update(notification)
+			.set({ isRead: true })
+			.where(eq(notification.userId, userId));
+	}
+
+	/**
+	 * Get unread notification count for a user
+	 */
+	async getUnreadCount(userId: string): Promise<number> {
+		const notifications = await db
+			.select()
+			.from(notification)
+			.where(and(eq(notification.userId, userId), eq(notification.isRead, false)));
+
+		return notifications.length;
+	}
+
+	/**
+	 * Delete a notification
+	 */
+	async deleteNotification(notificationId: string, userId: string): Promise<void> {
+		await db
+			.delete(notification)
+			.where(and(eq(notification.id, notificationId), eq(notification.userId, userId)));
+	}
+
+	/**
+	 * Delete all notifications for a user
+	 */
+	async deleteAllNotifications(userId: string): Promise<void> {
+		await db.delete(notification).where(eq(notification.userId, userId));
+	}
+}
+
+export const notificationService = new NotificationService();