wip

packages/racing/domain/entities/RaceRegistration.ts

@@ -1,12 +1,57 @@
 /**
  * Domain Entity: RaceRegistration
  *
- * Extracted from racing-application registrations module so that
- * registration-related types live in the racing-domain package.
+ * Represents a registration of a driver for a specific race.
  */
 
-export interface RaceRegistration {
+import type { IEntity } from '@gridpilot/shared/domain';
+import { RacingDomainValidationError } from '../errors/RacingDomainError';
+
+export interface RaceRegistrationProps {
+  id?: string;
   raceId: string;
   driverId: string;
-  registeredAt: Date;
+  registeredAt?: Date;
+}
+
+export class RaceRegistration implements IEntity<string> {
+  readonly id: string;
+  readonly raceId: string;
+  readonly driverId: string;
+  readonly registeredAt: Date;
+
+  private constructor(props: Required<RaceRegistrationProps>) {
+    this.id = props.id;
+    this.raceId = props.raceId;
+    this.driverId = props.driverId;
+    this.registeredAt = props.registeredAt;
+  }
+
+  static create(props: RaceRegistrationProps): RaceRegistration {
+    this.validate(props);
+
+    const id =
+      props.id && props.id.trim().length > 0
+        ? props.id
+        : `${props.raceId}:${props.driverId}`;
+
+    const registeredAt = props.registeredAt ?? new Date();
+
+    return new RaceRegistration({
+      id,
+      raceId: props.raceId,
+      driverId: props.driverId,
+      registeredAt,
+    });
+  }
+
+  private static validate(props: RaceRegistrationProps): void {
+    if (!props.raceId || props.raceId.trim().length === 0) {
+      throw new RacingDomainValidationError('Race ID is required');
+    }
+
+    if (!props.driverId || props.driverId.trim().length === 0) {
+      throw new RacingDomainValidationError('Driver ID is required');
+    }
+  }
 }