feat: Add notifications

toju-app/src/app/infrastructure/persistence/browser-database.service.ts

@@ -75,6 +75,17 @@ export class BrowserDatabaseService {
       .map((message) => this.normaliseMessage(message));
   }
 
+  async getMessagesSince(roomId: string, sinceTimestamp: number): Promise<Message[]> {
+    const allRoomMessages = await this.getAllFromIndex<Message>(
+      STORE_MESSAGES, 'roomId', roomId
+    );
+
+    return allRoomMessages
+      .filter((message) => message.timestamp > sinceTimestamp)
+      .sort((first, second) => first.timestamp - second.timestamp)
+      .map((message) => this.normaliseMessage(message));
+  }
+
   /** Delete a message by its ID. */
   async deleteMessage(messageId: string): Promise<void> {
     await this.deleteRecord(STORE_MESSAGES, messageId);

toju-app/src/app/infrastructure/persistence/database.service.ts

@@ -52,6 +52,9 @@ export class DatabaseService {
   /** Retrieve messages for a room with optional pagination. */
   getMessages(roomId: string, limit = 100, offset = 0) { return this.backend.getMessages(roomId, limit, offset); }
 
+  /** Retrieve messages newer than a given timestamp for a room. */
+  getMessagesSince(roomId: string, sinceTimestamp: number) { return this.backend.getMessagesSince(roomId, sinceTimestamp); }
+
   /** Permanently delete a message by ID. */
   deleteMessage(messageId: string) { return this.backend.deleteMessage(messageId); }
 

toju-app/src/app/infrastructure/persistence/electron-database.service.ts

@@ -47,6 +47,10 @@ export class ElectronDatabaseService {
     return this.api.query<Message[]>({ type: 'get-messages', payload: { roomId, limit, offset } });
   }
 
+  getMessagesSince(roomId: string, sinceTimestamp: number): Promise<Message[]> {
+    return this.api.query<Message[]>({ type: 'get-messages-since', payload: { roomId, sinceTimestamp } });
+  }
+
   /** Permanently delete a message by ID. */
   deleteMessage(messageId: string): Promise<void> {
     return this.api.command({ type: 'delete-message', payload: { messageId } });