rename to core

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

@@ -0,0 +1,22 @@
+import type { IRaceRegistrationRepository } from '@gridpilot/racing/domain/repositories/IRaceRegistrationRepository';
+import type { WithdrawFromRaceCommandDTO } from '../dto/WithdrawFromRaceCommandDTO';
+
+/**
+ * Mirrors legacy withdrawFromRace behavior:
+ * - throws when driver is not registered
+ * - removes registration and cleans up empty race sets
+ *
+ * The repository encapsulates the in-memory or persistent details.
+ */
+export class WithdrawFromRaceUseCase {
+  constructor(
+    private readonly registrationRepository: IRaceRegistrationRepository,
+  ) {}
+
+  async execute(command: WithdrawFromRaceCommandDTO): Promise<void> {
+    const { raceId, driverId } = command;
+
+    // Let repository enforce "not registered" error behavior to match legacy logic.
+    await this.registrationRepository.withdraw(raceId, driverId);
+  }
+}