api client refactor

apps/website/lib/view-models/DriverLeaderboardViewModel.ts

@@ -0,0 +1,28 @@
+import { DriversLeaderboardDto, DriverLeaderboardItemDto } from '../dtos';
+import { DriverLeaderboardItemViewModel } from './DriverLeaderboardItemViewModel';
+
+export class DriverLeaderboardViewModel implements DriversLeaderboardDto {
+  drivers: DriverLeaderboardItemViewModel[];
+
+  constructor(dto: DriversLeaderboardDto & { drivers: DriverLeaderboardItemDto[] }, previousDrivers?: DriverLeaderboardItemDto[]) {
+    this.drivers = dto.drivers.map((driver, index) => {
+      const previous = previousDrivers?.find(p => p.id === driver.id);
+      return new DriverLeaderboardItemViewModel(driver, index + 1, previous?.rating);
+    });
+  }
+
+  /** UI-specific: Total races across all drivers */
+  get totalRaces(): number {
+    return this.drivers.reduce((sum, driver) => sum + driver.races, 0);
+  }
+
+  /** UI-specific: Total wins across all drivers */
+  get totalWins(): number {
+    return this.drivers.reduce((sum, driver) => sum + driver.wins, 0);
+  }
+
+  /** UI-specific: Active drivers count */
+  get activeCount(): number {
+    return this.drivers.filter(driver => driver.isActive).length;
+  }
+}