refactor racing use cases

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

@@ -1,25 +1,41 @@
 import type { IRaceRepository } from '../../domain/repositories/IRaceRepository';
-import type { GetTotalRacesOutputPort } from '../ports/output/GetTotalRacesOutputPort';
 import { Result } from '@core/shared/application/Result';
 import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
-import type { AsyncUseCase , Logger } from '@core/shared/application';
+import type { Logger, UseCaseOutputPort } from '@core/shared/application';
 
-export class GetTotalRacesUseCase implements AsyncUseCase<void, GetTotalRacesOutputPort, 'REPOSITORY_ERROR'>
-{
+export type GetTotalRacesInput = {};
+
+export interface GetTotalRacesResult {
+  totalRaces: number;
+}
+
+export type GetTotalRacesErrorCode = 'REPOSITORY_ERROR';
+
+export class GetTotalRacesUseCase {
   constructor(
     private readonly raceRepository: IRaceRepository,
     private readonly logger: Logger,
+    private readonly output: UseCaseOutputPort<GetTotalRacesResult>,
   ) {}
 
-  async execute(): Promise<Result<GetTotalRacesOutputPort, ApplicationErrorCode<'REPOSITORY_ERROR'>>> {
+  async execute(_input: GetTotalRacesInput): Promise<
+    Result<void, ApplicationErrorCode<GetTotalRacesErrorCode, { message: string }>>
+  > {
     try {
       const races = await this.raceRepository.findAll();
-      const output: GetTotalRacesOutputPort = { totalRaces: races.length };
 
-      return Result.ok(output);
+      this.output.present({ totalRaces: races.length });
+
+      return Result.ok(undefined);
     } catch (error) {
-      this.logger.error('Error retrieving total races', error as Error);
-      return Result.err({ code: 'REPOSITORY_ERROR', details: { message: 'Failed to retrieve total races' } });
+      const err = error as Error;
+
+      this.logger.error('Error retrieving total races', err);
+
+      return Result.err({
+        code: 'REPOSITORY_ERROR',
+        details: { message: err.message ?? 'Failed to compute total races' },
+      });
     }
   }
-}
+}