wip

packages/racing/domain/services/StrengthOfFieldCalculator.ts

@@ -1,6 +1,8 @@
+import type { IDomainCalculationService } from '@gridpilot/shared/domain';
+
 /**
  * Domain Service: StrengthOfFieldCalculator
- * 
+ *
  * Calculates the Strength of Field (SOF) for a race based on participant ratings.
  * SOF is the average rating of all participants in a race.
  */
@@ -21,7 +23,9 @@ export interface StrengthOfFieldCalculator {
 /**
  * Default implementation using simple average
  */
-export class AverageStrengthOfFieldCalculator implements StrengthOfFieldCalculator {
+export class AverageStrengthOfFieldCalculator
+  implements StrengthOfFieldCalculator, IDomainCalculationService<DriverRating[], number | null>
+{
   calculate(driverRatings: DriverRating[]): number | null {
     if (driverRatings.length === 0) {
       return null;