wip

apps/website/lib/presenters/DriversLeaderboardPresenter.ts

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+import type { Driver } from '@gridpilot/racing/domain/entities/Driver';
+import type { SkillLevel } from '@gridpilot/racing/domain/services/SkillLevelService';
+import { SkillLevelService } from '@gridpilot/racing/domain/services/SkillLevelService';
+import type {
+  IDriversLeaderboardPresenter,
+  DriverLeaderboardItemViewModel,
+  DriversLeaderboardViewModel,
+} from '@gridpilot/racing/application/presenters/IDriversLeaderboardPresenter';
+
+export class DriversLeaderboardPresenter implements IDriversLeaderboardPresenter {
+  private viewModel: DriversLeaderboardViewModel | null = null;
+
+  present(
+    drivers: Driver[],
+    rankings: Array<{ driverId: string; rating: number; overallRank: number }>,
+    stats: Record<string, { rating: number; wins: number; podiums: number; totalRaces: number; overallRank: number }>,
+    avatarUrls: Record<string, string>
+  ): DriversLeaderboardViewModel {
+    const items: DriverLeaderboardItemViewModel[] = drivers.map((driver) => {
+      const driverStats = stats[driver.id];
+      const rating = driverStats?.rating ?? 0;
+      const wins = driverStats?.wins ?? 0;
+      const podiums = driverStats?.podiums ?? 0;
+      const totalRaces = driverStats?.totalRaces ?? 0;
+
+      let effectiveRank = Number.POSITIVE_INFINITY;
+      if (typeof driverStats?.overallRank === 'number' && driverStats.overallRank > 0) {
+        effectiveRank = driverStats.overallRank;
+      } else {
+        const indexInGlobal = rankings.findIndex((entry) => entry.driverId === driver.id);
+        if (indexInGlobal !== -1) {
+          effectiveRank = indexInGlobal + 1;
+        }
+      }
+
+      const skillLevel = SkillLevelService.getSkillLevel(rating);
+      const isActive = rankings.some((r) => r.driverId === driver.id);
+
+      return {
+        id: driver.id,
+        name: driver.name,
+        rating,
+        skillLevel,
+        nationality: driver.country,
+        racesCompleted: totalRaces,
+        wins,
+        podiums,
+        isActive,
+        rank: effectiveRank,
+        avatarUrl: avatarUrls[driver.id] ?? '',
+      };
+    });
+
+    items.sort((a, b) => {
+      const rankA = Number.isFinite(a.rank) && a.rank > 0 ? a.rank : Number.POSITIVE_INFINITY;
+      const rankB = Number.isFinite(b.rank) && b.rank > 0 ? b.rank : Number.POSITIVE_INFINITY;
+      if (rankA !== rankB) return rankA - rankB;
+      return b.rating - a.rating;
+    });
+
+    const totalRaces = items.reduce((sum, d) => sum + d.racesCompleted, 0);
+    const totalWins = items.reduce((sum, d) => sum + d.wins, 0);
+    const activeCount = items.filter((d) => d.isActive).length;
+
+    this.viewModel = {
+      drivers: items,
+      totalRaces,
+      totalWins,
+      activeCount,
+    };
+
+    return this.viewModel;
+  }
+
+  getViewModel(): DriversLeaderboardViewModel {
+    if (!this.viewModel) {
+      throw new Error('Presenter has not been called yet');
+    }
+    return this.viewModel;
+  }
+}