wip league admin tools

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

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+import type { UseCaseOutputPort } from '@core/shared/application';
+import { Result } from '@core/shared/application/Result';
+import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
+import type { Driver } from '../../domain/entities/Driver';
+import type { LeagueMembership } from '../../domain/entities/LeagueMembership';
+import type { IDriverRepository } from '../../domain/repositories/IDriverRepository';
+import type { ILeagueMembershipRepository } from '../../domain/repositories/ILeagueMembershipRepository';
+import type { ILeagueRepository } from '../../domain/repositories/ILeagueRepository';
+
+export interface GetLeagueRosterMembersInput {
+  leagueId: string;
+}
+
+export type GetLeagueRosterMembersErrorCode = 'LEAGUE_NOT_FOUND' | 'REPOSITORY_ERROR';
+
+export interface LeagueRosterMember {
+  membership: LeagueMembership;
+  driver: Driver;
+}
+
+export interface GetLeagueRosterMembersResult {
+  members: LeagueRosterMember[];
+}
+
+export class GetLeagueRosterMembersUseCase {
+  constructor(
+    private readonly leagueMembershipRepository: ILeagueMembershipRepository,
+    private readonly driverRepository: IDriverRepository,
+    private readonly leagueRepository: ILeagueRepository,
+    private readonly output: UseCaseOutputPort<GetLeagueRosterMembersResult>,
+  ) {}
+
+  async execute(
+    input: GetLeagueRosterMembersInput,
+  ): Promise<Result<void, ApplicationErrorCode<GetLeagueRosterMembersErrorCode, { message: string }>>> {
+    try {
+      const leagueExists = await this.leagueRepository.exists(input.leagueId);
+
+      if (!leagueExists) {
+        return Result.err({
+          code: 'LEAGUE_NOT_FOUND',
+          details: { message: 'League not found' },
+        });
+      }
+
+      const memberships = await this.leagueMembershipRepository.getLeagueMembers(input.leagueId);
+
+      const driverIds = [...new Set(memberships.map(membership => membership.driverId.toString()))];
+      const drivers = await Promise.all(driverIds.map(id => this.driverRepository.findById(id)));
+
+      const driverMap = new Map<string, Driver>(
+        drivers.filter((driver): driver is Driver => driver !== null).map(driver => [driver.id, driver]),
+      );
+
+      const members: LeagueRosterMember[] = memberships
+        .filter(membership => driverMap.has(membership.driverId.toString()))
+        .map(membership => ({
+          membership,
+          driver: driverMap.get(membership.driverId.toString())!,
+        }));
+
+      this.output.present({ members });
+
+      return Result.ok(undefined);
+    } catch (error: unknown) {
+      const message = error instanceof Error ? error.message : 'Failed to load league roster members';
+
+      return Result.err({
+        code: 'REPOSITORY_ERROR',
+        details: { message },
+      });
+    }
+  }
+}