Redid the TypeORM initialization. Adding new /vapid path

src/db.ts

@@ -1,51 +1,71 @@
 
 import { DataSource, Repository } from "typeorm";
-import {Subscription}  from './Subscription.js'
+import { Subscription }  from './Subscription.js'
 import { VapidKeys } from './VapidKeys.js';
 
-export class DBService {
+class DBService {
+  private static instance: DBService;
   private dataSource: DataSource;
-  private vapidSource: DataSource;
   private subscriptionRepository: Repository<Subscription>;
   private vapidRepository: Repository<VapidKeys>;
+  public isReady = false;
 
-  constructor() {
+
+  private constructor() {
+    console.log("DBService constructor");
     this.dataSource = new DataSource({
       type: "sqlite",
-      database: "subscriptions",
-      entities: [Subscription],
+      database: "push_server",
+      entities: [VapidKeys, Subscription]
     });
-    this.subscriptionRepository = this.dataSource.getRepository(Subscription)
+    this.dataSource.initialize().then(()=>{
+      console.log("Initialized");
+      this.subscriptionRepository = this.dataSource.getRepository(Subscription);
+      this.vapidRepository = this.dataSource.getRepository(VapidKeys);
+      this.isReady = true;
+    }).catch((err)=>{console.error(err);});    
+  }
 
-    this.vapidSource = new DataSource({
-      type: "sqlite",
-      database: "vapidKeys",
-      entities: [VapidKeys],
-    });
 
-    this.vapidRepository = this.vapidSource.getRepository(VapidKeys);
+  public static getInstance(): DBService {
+    if (!DBService.instance) {
+      DBService.instance = new DBService();
+    }
+    return DBService.instance;
   }
 
+
   async saveSubscription(endpoint: string, keys_p256dh: string, keys_auth: string) {
     const subscription = new Subscription();
     subscription.endpoint = endpoint;
     subscription.keys_auth = keys_auth;
     subscription.keys_p256dh = keys_p256dh;
-    return this.subscriptionRepository.save(subscription);
+    return await this.dataSource.manager.save(subscription);
   }
 
+
   async getSubscriptions(): Promise<Subscription[]> {
-    return this.subscriptionRepository.find();
+    return await this.subscriptionRepository.find();
   }
 
+
   async getVapidKeys(): Promise<VapidKeys[]> {
-    return this.vapidRepository.find();
+    let result = [ new VapidKeys() ];
+    if ( this.vapidRepository && this.isReady) {
+      result = await this.vapidRepository.find();
+    } else {
+      console.log("vapidRepository is null or db is not ready");
+    }
+    return result
   }
 
+
   async saveVapidKeys(publicKey: string, privateKey: string) {
     const vapidkeys = new VapidKeys();
     vapidkeys.privateKey = privateKey;
     vapidkeys.publicKey = publicKey;
-    return this.vapidRepository.save(vapidkeys);
+    return await this.dataSource.manager.save(vapidkeys);
   }
 }
+
+export default DBService;

src/main.ts

@@ -1,10 +1,13 @@
-import { SubscriptionService } from './subscriptionService.js';
+import SubscriptionService from './subscriptionService.js';
 import { Message, NotificationService } from './notificationService.js';
+import { VapidKeys } from './VapidKeys.js';
+import VapidService from './vapidService.js';
+
 import express, { Express, Request, Response } from 'express';
+
 import { Worker } from 'worker_threads';
 import { fileURLToPath } from 'url';
 import { dirname, join } from 'path';
-import { networkInterfaces } from 'os';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
@@ -21,14 +24,14 @@ class Server {
   private app: Express;
   private port: number;
   private worker?: Worker;
-  private subscriptionService: SubscriptionService;
+  private subscriptionService: SubscriptionService = SubscriptionService.getInstance();
   private notificationService: NotificationService;
+  private vapidService: VapidService = VapidService.getInstance();
   private message: Message;
 
   constructor(port: number) {
     this.app = express();
     this.port = port;
-    this.subscriptionService = new SubscriptionService();
     this.notificationService = new NotificationService();
 
     this.setupRoutes();
@@ -36,15 +39,22 @@ class Server {
     this.setupWorkerListeners();
   }
 
+
   private setupRoutes(): void {
     this.app.post('/subscribe', async (req: Request, res: Response) => {
       const subscription = req.body as Subscription;
-      const subscriptionService = new SubscriptionService();
-      await subscriptionService.addSubscription(subscription);
+      await this.subscriptionService.addSubscription(subscription);
       res.status(201).send();
     });
+    
+    this.app.get('/vapid', async (_: Request, res: Response) => {
+      const vapidkeys: VapidKeys = await this.vapidService.getVapidKeys()[0];
+      console.log(vapidkeys);
+      res.send({});
+    });
   }
 
+
   private startWorker(): void {
     const workerPath = join(__dirname,'./worker.js');
 

src/notificationService.ts

@@ -1,5 +1,5 @@
-import { SubscriptionService } from './subscriptionService.js';
-import { VapidService } from './vapidService.js';
+import SubscriptionService from './subscriptionService.js';
+import VapidService from './vapidService.js';
 import { VapidKeys } from './VapidKeys.js';
 import * as https from 'https';
 import * as http_ece from 'http_ece';
@@ -14,12 +14,12 @@ export interface Message {
 
 export class NotificationService {
 
-    private subscriptionService: SubscriptionService;
-    private vapidService: VapidService;
+    private subscriptionService: SubscriptionService = SubscriptionService.getInstance();
+    private vapidService: VapidService = VapidService.getInstance();
 
     constructor() {
-        this.subscriptionService = new SubscriptionService();
-        this.vapidService = new VapidService();
+      console.log("NotificationService constructor");
+
     }
 
     private generateSalt(length = 16): Buffer {

src/subscriptionService.ts

@@ -1,4 +1,4 @@
-import { DBService } from './db.js';
+import DBService  from './db.js';
 import { Subscription } from './Subscription.js';
 
 export interface SubscriptionData {
@@ -9,13 +9,23 @@ export interface SubscriptionData {
   };
 }
 
-export class SubscriptionService {
-  private dbService: DBService;
+class SubscriptionService {
+  private static instance: SubscriptionService;
+  private dbService: DBService = DBService.getInstance();
 
-  constructor() {
-    this.dbService = new DBService();
+  private constructor() {
+    console.log("SubscriptionService constructor");
   }
 
+
+  public static getInstance(): SubscriptionService {
+    if (!SubscriptionService.instance) {
+      SubscriptionService.instance = new SubscriptionService();
+    }
+    return SubscriptionService.instance;
+  }
+
+
   async addSubscription(subscription: SubscriptionData): Promise<void> {
     await this.dbService.saveSubscription(
       subscription.endpoint,
@@ -24,7 +34,10 @@ export class SubscriptionService {
     );
   }
 
+
   async fetchSubscriptions(): Promise<Subscription[]> {
     return this.dbService.getSubscriptions();
   }
 }
+
+export default SubscriptionService;

src/vapidService.ts

@@ -1,44 +1,63 @@
 
+import { VapidKeys } from './VapidKeys.js';
 import jwt from 'jsonwebtoken';
 import crypto from 'crypto';
-import { DBService } from './db.js';
-import { VapidKeys } from './VapidKeys.js';
+import DBService from './db.js';
 
 export interface VapidKeyData {
   publicKey: string;
   privateKey: string;
 }
 
-export class VapidService {
-  private dbService: DBService;
+class VapidService {
+  private static instance: VapidService;
+  private dbService: DBService = DBService.getInstance();
+
+  private constructor() {
+    if (this.dbService.isReady) {
+      const keys = this.generateVAPIDKeys();
+      this.addVapidKeys(keys);
+      
+    } else {
+      console.log("Not ready.");
+    }
+  }
 
-  constructor() {
-    this.dbService = new DBService();
-    const keys = this.generateVAPIDKeys();
-    this.addVapidKeys(keys);
+
+  public static getInstance(): VapidService {
+    if (!VapidService.instance) {
+      VapidService.instance = new VapidService();
+    }
+    return VapidService.instance;
   }
 
+
   private generateVAPIDKeys(): VapidKeyData {
     const ecdh = crypto.createECDH('prime256v1');
     ecdh.generateKeys();
-    
-    return {
+    const result = {
       publicKey: ecdh.getPublicKey().toString('base64'),
       privateKey: ecdh.getPrivateKey().toString('base64')
     };
+    console.log(result);
+    return result;
   }
 
-  async addVapidKeys(vapidkeys: VapidKeyData) { 
+
+  private async addVapidKeys(vapidkeys: VapidKeyData) { 
     const keys = await this.getVapidKeys();
-    if (keys.length == 0) {
+    console.log(keys);
+    if (keys.length == 1 && typeof(keys[0].publicKey) == "undefined" ) {
       this.dbService.saveVapidKeys(vapidkeys.publicKey, vapidkeys.privateKey);
     }
   }
 
+
   async getVapidKeys(): Promise<VapidKeys[]> {
     return this.dbService.getVapidKeys();
   }
 
+
   async createVapidAuthHeader(endpoint: string, expiration: number, subject: string): Promise<{ 'Authorization': string, 'Crypto-Key': string }> {
     const { publicKey, privateKey } = await this.getVapidKeys()[0];
 
@@ -56,3 +75,5 @@ export class VapidService {
     };
   }
 }
+
+export default VapidService;