Menyelesaikan object user dan init base

src/core/events/README.md

@@ -0,0 +1,14 @@
+core/events/
+
+Penjelasan:
+Folder ini berisi pondasi untuk domain events: definisi event, publisher, dispatcher, dan handler.
+
+Isi yang direkomendasikan:
+- event.interface.ts (DomainEvent)
+- event-publisher.ts (interface dan implementasi sederhana)
+- event-dispatcher.ts (dispatcher untuk publish/dispatch event)
+- event-handler.ts (type alias untuk handler)
+
+Aturan:
+- Event hanya bermakna untuk komunikasi lintas module atau untuk memisahkan side-effect.
+- Hindari business logic kompleks di handler; handler sebaiknya mendelegasikan ke application service atau job queue.

src/core/events/event-dispatcher.ts

@@ -0,0 +1,13 @@
+import { DomainEvent } from './event.interface';
+
+export class EventDispatcher {
+  private publisher = new (require('./event-publisher').InMemoryEventPublisher)();
+
+  register(handler: (e: DomainEvent) => Promise<void>) {
+    this.publisher.register(handler);
+  }
+
+  async dispatch(event: DomainEvent) {
+    await this.publisher.publish(event);
+  }
+}

src/core/events/event-handler.ts

@@ -0,0 +1,3 @@
+import { DomainEvent } from './event.interface';
+
+export type EventHandler = (event: DomainEvent) => Promise<void>;

src/core/events/event-publisher.ts

@@ -0,0 +1,17 @@
+import { DomainEvent } from './event.interface';
+
+export interface EventPublisher {
+  publish(event: DomainEvent): Promise<void>;
+}
+
+export class InMemoryEventPublisher implements EventPublisher {
+  private handlers: Array<(e: DomainEvent) => Promise<void>> = [];
+
+  register(handler: (e: DomainEvent) => Promise<void>) {
+    this.handlers.push(handler);
+  }
+
+  async publish(event: DomainEvent) {
+    await Promise.all(this.handlers.map((h) => h(event)));
+  }
+}

src/core/events/event.interface.ts

@@ -0,0 +1,5 @@
+export interface DomainEvent {
+  readonly name: string;
+  readonly payload: any;
+  readonly occurredAt: Date;
+}