init

src/app/database/database.ts

@@ -0,0 +1,46 @@
+/**
+ * database.ts
+ * Dexie (IndexedDB) singleton for the P2P Survey App.
+ *
+ * All survey data — surveys, participant tokens, and responses — lives
+ * exclusively in the creator's browser. Dexie wraps the raw IndexedDB API
+ * with a clean, Promise-based interface and live-query support.
+ *
+ * Usage (inject via InjectionToken, see main.ts):
+ *   constructor(@Inject(DATABASE_TOKEN) private db: AppDatabase) {}
+ */
+
+import Dexie, { type Table } from 'dexie';
+import type { Survey, Participant, Response } from '../shared/models/survey.models';
+
+/** Typed Dexie database class */
+export class AppDatabase extends Dexie {
+  /** All surveys created by this user */
+  surveys!: Table<Survey, string>;
+
+  /**
+   * Pre-generated participant tokens.
+   * Primary key: token (UUID string).
+   */
+  participants!: Table<Participant, string>;
+
+  /**
+   * Submitted responses.
+   * Primary key: id (UUID string).
+   */
+  responses!: Table<Response, string>;
+
+  constructor() {
+    super('P2PSurveyDB');
+
+    this.version(1).stores({
+      // Indexed fields: primary key first, then fields used in queries
+      surveys:      'id, status, createdAt',
+      participants: 'token, surveyId, locked',
+      responses:    'id, surveyId, participantToken, submittedAt',
+    });
+  }
+}
+
+/** Module-level singleton — import this wherever you need direct DB access */
+export const db = new AppDatabase();