Desenvolvendo Aplicações
Enterprise Modernas

// Public API Provider Pattern
@Injectable()
export class BillingPublicApiProvider 
  implements BillingSubscriptionStatusApi {
  
  constructor(
    private readonly subscriptionService: SubscriptionService
  ) {}

  async isUserSubscriptionActive(userId: string): Promise<boolean> {
    return await this.subscriptionService
      .isUserSubscriptionActive(userId);
  }
}

// eslint-plugin-project-structure
{
  "rules": {
    "project-structure/file-structure": "error",
    "project-structure/folder-structure": "error"
  },
  "settings": {
    "projectStructure": {
      "structure": {
        "src/module/{domain}/": {
          "children": ["core/", "http/", "persistence/"]
        }
      }
    }
  }
}

// Producer
@Injectable()
export class VideoProcessingJobProducer {
  constructor(
    @InjectQueue(QUEUES.VIDEO_PROCESSING) 
    private queue: Queue
  ) {}
  
  async processVideo(videoId: string, url: string) {
    await this.queue.add<VideoProcessingJobData>({
      videoId,
      url,
      timestamp: new Date(),
    });
  }
}

// Arquitetura Modular com Monorepo (Nx)
fakeflix/
├── apps/
│   ├── monolith/           # Todos os módulos juntos
│   ├── content-streaming/  # Só catálogo e streaming
│   ├── video-processor/    # Workers de processamento
│   └── admin-panel/        # Painel administrativo
│
├── libs/                   # Módulos reutilizáveis
│   ├── identity/
│   ├── billing/
│   ├── content/
│   └── shared/

# Build apenas o que mudou
nx affected:build

# Deploy seletivo por necessidade
nx run content-streaming:deploy  # Escala streaming
nx run video-processor:deploy    # Escala workers