Add web push notification system for user engagement and updates

Implement a web push notification system, including service worker integration, user subscription management, and an admin interface for sending broadcast messages.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 23852c00-4779-460a-9e0c-d09fee4b6c92
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server/storage.ts

@@ -1,4 +1,4 @@
-import { type Article, type InsertArticle, articles, articleViews } from "@shared/schema";
+import { type Article, type InsertArticle, articles, articleViews, type InsertPushSubscription, type PushSubscription, pushSubscriptions } from "@shared/schema";
 import { db } from "./db";
 import { eq, desc, sql, count, and } from "drizzle-orm";
 import crypto from "crypto";
@@ -15,6 +15,10 @@ export interface IStorage {
   updateArticle(id: number, article: Partial<InsertArticle>): Promise<Article | undefined>;
   incrementViews(id: number, ip: string): Promise<boolean>;
   deleteArticle(id: number): Promise<void>;
+  savePushSubscription(sub: InsertPushSubscription): Promise<PushSubscription>;
+  deletePushSubscription(endpoint: string): Promise<void>;
+  getAllPushSubscriptions(): Promise<PushSubscription[]>;
+  getPushSubscriptionCount(): Promise<number>;
 }
 
 export class DatabaseStorage implements IStorage {
@@ -76,6 +80,29 @@ export class DatabaseStorage implements IStorage {
   async deleteArticle(id: number): Promise<void> {
     await db.delete(articles).where(eq(articles.id, id));
   }
+
+  async savePushSubscription(sub: InsertPushSubscription): Promise<PushSubscription> {
+    const [existing] = await db.select().from(pushSubscriptions).where(eq(pushSubscriptions.endpoint, sub.endpoint)).limit(1);
+    if (existing) {
+      const [updated] = await db.update(pushSubscriptions).set(sub).where(eq(pushSubscriptions.endpoint, sub.endpoint)).returning();
+      return updated;
+    }
+    const [created] = await db.insert(pushSubscriptions).values(sub).returning();
+    return created;
+  }
+
+  async deletePushSubscription(endpoint: string): Promise<void> {
+    await db.delete(pushSubscriptions).where(eq(pushSubscriptions.endpoint, endpoint));
+  }
+
+  async getAllPushSubscriptions(): Promise<PushSubscription[]> {
+    return db.select().from(pushSubscriptions);
+  }
+
+  async getPushSubscriptionCount(): Promise<number> {
+    const [result] = await db.select({ count: count() }).from(pushSubscriptions);
+    return result.count;
+  }
 }
 
 export const storage = new DatabaseStorage();