league service

apps/api/src/modules/league/presenters/LeagueStandingsPresenter.ts

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+import { ILeagueStandingsPresenter, LeagueStandingsResultDTO, LeagueStandingsViewModel } from '@gridpilot/racing/application/presenters/ILeagueStandingsPresenter';
+
+export class LeagueStandingsPresenter implements ILeagueStandingsPresenter {
+  private result: LeagueStandingsViewModel | null = null;
+
+  reset() {
+    this.result = null;
+  }
+
+  present(dto: LeagueStandingsResultDTO) {
+    const driverMap = new Map(dto.drivers.map(d => [d.id, { id: d.id, name: d.name }]));
+    const standings = dto.standings
+      .sort((a, b) => a.position - b.position)
+      .map(standing => ({
+        driverId: standing.driverId,
+        driver: driverMap.get(standing.driverId)!,
+        points: standing.points,
+        rank: standing.position,
+      }));
+    this.result = { standings };
+  }
+
+  getViewModel(): LeagueStandingsViewModel {
+    if (!this.result) throw new Error('Presenter not presented');
+    return this.result;
+  }
+}