team rating

core/racing/domain/value-objects/TeamRatingDelta.ts

@@ -0,0 +1,57 @@
+import type { IValueObject } from '@core/shared/domain';
+import { RacingDomainValidationError } from '../errors/RacingDomainError';
+
+export interface TeamRatingDeltaProps {
+  value: number;
+}
+
+export class TeamRatingDelta implements IValueObject<TeamRatingDeltaProps> {
+  readonly value: number;
+
+  private constructor(value: number) {
+    this.value = value;
+  }
+
+  static create(value: number): TeamRatingDelta {
+    if (typeof value !== 'number' || isNaN(value)) {
+      throw new RacingDomainValidationError('Team rating delta must be a valid number');
+    }
+
+    // Delta can be negative or positive, but within reasonable bounds
+    if (value < -100 || value > 100) {
+      throw new RacingDomainValidationError(
+        `Team rating delta must be between -100 and 100, got: ${value}`
+      );
+    }
+
+    return new TeamRatingDelta(value);
+  }
+
+  get props(): TeamRatingDeltaProps {
+    return { value: this.value };
+  }
+
+  equals(other: IValueObject<TeamRatingDeltaProps>): boolean {
+    return this.value === other.props.value;
+  }
+
+  toNumber(): number {
+    return this.value;
+  }
+
+  toString(): string {
+    return this.value.toString();
+  }
+
+  isPositive(): boolean {
+    return this.value > 0;
+  }
+
+  isNegative(): boolean {
+    return this.value < 0;
+  }
+
+  isZero(): boolean {
+    return this.value === 0;
+  }
+}