refactor

core/racing/domain/entities/SubmittedAt.ts

@@ -0,0 +1,20 @@
+import { RacingDomainValidationError } from '../errors/RacingDomainError';
+
+export class SubmittedAt {
+  private constructor(private readonly value: Date) {}
+
+  static create(value: Date): SubmittedAt {
+    if (!(value instanceof Date) || isNaN(value.getTime())) {
+      throw new RacingDomainValidationError('SubmittedAt must be a valid Date');
+    }
+    return new SubmittedAt(new Date(value));
+  }
+
+  toDate(): Date {
+    return new Date(this.value);
+  }
+
+  equals(other: SubmittedAt): boolean {
+    return this.value.getTime() === other.value.getTime();
+  }
+}