wip

packages/analytics/infrastructure/repositories/InMemoryEngagementRepository.ts

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+/**
+ * Infrastructure: InMemoryEngagementRepository
+ * 
+ * In-memory implementation of IEngagementRepository for development/testing.
+ */
+
+import type { IEngagementRepository } from '../../domain/repositories/IEngagementRepository';
+import { EngagementEvent, type EngagementAction, type EngagementEntityType } from '../../domain/entities/EngagementEvent';
+
+export class InMemoryEngagementRepository implements IEngagementRepository {
+  private events: Map<string, EngagementEvent> = new Map();
+
+  async save(event: EngagementEvent): Promise<void> {
+    this.events.set(event.id, event);
+  }
+
+  async findById(id: string): Promise<EngagementEvent | null> {
+    return this.events.get(id) ?? null;
+  }
+
+  async findByEntityId(entityType: EngagementEntityType, entityId: string): Promise<EngagementEvent[]> {
+    return Array.from(this.events.values()).filter(
+      e => e.entityType === entityType && e.entityId === entityId
+    );
+  }
+
+  async findByAction(action: EngagementAction): Promise<EngagementEvent[]> {
+    return Array.from(this.events.values()).filter(
+      e => e.action === action
+    );
+  }
+
+  async findByDateRange(startDate: Date, endDate: Date): Promise<EngagementEvent[]> {
+    return Array.from(this.events.values()).filter(
+      e => e.timestamp >= startDate && e.timestamp <= endDate
+    );
+  }
+
+  async countByAction(action: EngagementAction, entityId?: string, since?: Date): Promise<number> {
+    return Array.from(this.events.values()).filter(
+      e => e.action === action &&
+           (!entityId || e.entityId === entityId) &&
+           (!since || e.timestamp >= since)
+    ).length;
+  }
+
+  async getSponsorClicksForEntity(entityId: string, since?: Date): Promise<number> {
+    return Array.from(this.events.values()).filter(
+      e => e.entityId === entityId &&
+           (e.action === 'click_sponsor_logo' || e.action === 'click_sponsor_url') &&
+           (!since || e.timestamp >= since)
+    ).length;
+  }
+
+  // Helper for testing
+  clear(): void {
+    this.events.clear();
+  }
+
+  // Helper for seeding demo data
+  seed(events: EngagementEvent[]): void {
+    events.forEach(e => this.events.set(e.id, e));
+  }
+}