refactor

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

@@ -1,20 +1,26 @@
 import type { ILeagueRepository } from '../../domain/repositories/ILeagueRepository';
-import type { IGetTotalLeaguesPresenter, GetTotalLeaguesResultDTO, GetTotalLeaguesViewModel } from '../presenters/IGetTotalLeaguesPresenter';
-import type { UseCase } from '@core/shared/application/UseCase';
+import type { GetTotalLeaguesResultDTO } from '../presenters/IGetTotalLeaguesPresenter';
+import { Result } from '@core/shared/application/Result';
+import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
+import type { AsyncUseCase } from '@core/shared/application';
+import type { Logger } from '@core/shared/application';
 
-export interface GetTotalLeaguesUseCaseParams {}
+export class GetTotalLeaguesUseCase implements AsyncUseCase<void, GetTotalLeaguesResultDTO, 'REPOSITORY_ERROR'>
+{
+  constructor(
+    private readonly leagueRepository: ILeagueRepository,
+    private readonly logger: Logger,
+  ) {}
 
-export interface GetTotalLeaguesResultDTO {
-  totalLeagues: number;
-}
+  async execute(): Promise<Result<GetTotalLeaguesResultDTO, ApplicationErrorCode<'REPOSITORY_ERROR'>>> {
+    try {
+      const leagues = await this.leagueRepository.findAll();
+      const dto: GetTotalLeaguesResultDTO = { totalLeagues: leagues.length };
 
-export class GetTotalLeaguesUseCase implements UseCase<GetTotalLeaguesUseCaseParams, GetTotalLeaguesResultDTO, GetTotalLeaguesViewModel, IGetTotalLeaguesPresenter> {
-  constructor(private readonly leagueRepository: ILeagueRepository) {}
-
-  async execute(params: GetTotalLeaguesUseCaseParams, presenter: IGetTotalLeaguesPresenter): Promise<void> {
-    const leagues = await this.leagueRepository.findAll();
-    const dto: GetTotalLeaguesResultDTO = { totalLeagues: leagues.length };
-    presenter.reset();
-    presenter.present(dto);
+      return Result.ok(dto);
+    } catch (error) {
+      this.logger.error('Error retrieving total leagues', error as Error);
+      return Result.err({ code: 'REPOSITORY_ERROR', details: { message: 'Failed to retrieve total leagues' } });
+    }
   }
 }