league service

core/racing/application/use-cases/GetTotalDriversUseCase.ts

@@ -0,0 +1,23 @@
+import type { IDriverRepository } from '../../domain/repositories/IDriverRepository';
+import type { ITotalDriversPresenter, TotalDriversResultDTO } from '../presenters/ITotalDriversPresenter';
+import type { UseCase } from '@gridpilot/shared/application/UseCase';
+
+/**
+ * Use Case for retrieving total number of drivers.
+ */
+export class GetTotalDriversUseCase
+  implements UseCase<void, TotalDriversResultDTO, any, ITotalDriversPresenter>
+{
+  constructor(private readonly driverRepository: IDriverRepository) {}
+
+  async execute(_input: void, presenter: ITotalDriversPresenter): Promise<void> {
+    presenter.reset();
+
+    const drivers = await this.driverRepository.findAll();
+    const dto: TotalDriversResultDTO = {
+      totalDrivers: drivers.length,
+    };
+
+    presenter.present(dto);
+  }
+}