wip

packages/racing/domain/services/ChampionshipAggregator.ts

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+import type { ChampionshipConfig } from '../value-objects/ChampionshipConfig';
+import type { ParticipantRef } from '../value-objects/ParticipantRef';
+import { ChampionshipStanding } from '../entities/ChampionshipStanding';
+import type { ParticipantEventPoints } from './EventScoringService';
+import { DropScoreApplier, type EventPointsEntry } from './DropScoreApplier';
+
+export class ChampionshipAggregator {
+  constructor(private readonly dropScoreApplier: DropScoreApplier) {}
+
+  aggregate(params: {
+    seasonId: string;
+    championship: ChampionshipConfig;
+    eventPointsByEventId: Record<string, ParticipantEventPoints[]>;
+  }): ChampionshipStanding[] {
+    const { seasonId, championship, eventPointsByEventId } = params;
+
+    const perParticipantEvents = new Map<
+      string,
+      { participant: ParticipantRef; events: EventPointsEntry[] }
+    >();
+
+    for (const [eventId, pointsList] of Object.entries(eventPointsByEventId)) {
+      for (const entry of pointsList) {
+        const key = entry.participant.id;
+        const existing = perParticipantEvents.get(key);
+        const eventEntry: EventPointsEntry = {
+          eventId,
+          points: entry.totalPoints,
+        };
+
+        if (existing) {
+          existing.events.push(eventEntry);
+        } else {
+          perParticipantEvents.set(key, {
+            participant: entry.participant,
+            events: [eventEntry],
+          });
+        }
+      }
+    }
+
+    const standings: ChampionshipStanding[] = [];
+
+    for (const { participant, events } of perParticipantEvents.values()) {
+      const dropResult = this.dropScoreApplier.apply(
+        championship.dropScorePolicy,
+        events,
+      );
+
+      const totalPoints = dropResult.totalPoints;
+      const resultsCounted = dropResult.counted.length;
+      const resultsDropped = dropResult.dropped.length;
+
+      standings.push(
+        new ChampionshipStanding({
+          seasonId,
+          championshipId: championship.id,
+          participant,
+          totalPoints,
+          resultsCounted,
+          resultsDropped,
+          position: 0,
+        }),
+      );
+    }
+
+    standings.sort((a, b) => b.totalPoints - a.totalPoints);
+
+    return standings.map((s, index) => s.withPosition(index + 1));
+  }
+}

packages/racing/domain/services/DropScoreApplier.ts

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+import type { DropScorePolicy } from '../value-objects/DropScorePolicy';
+
+export interface EventPointsEntry {
+  eventId: string;
+  points: number;
+}
+
+export interface DropScoreResult {
+  counted: EventPointsEntry[];
+  dropped: EventPointsEntry[];
+  totalPoints: number;
+}
+
+export class DropScoreApplier {
+  apply(policy: DropScorePolicy, events: EventPointsEntry[]): DropScoreResult {
+    if (policy.strategy === 'none' || events.length === 0) {
+      const totalPoints = events.reduce((sum, e) => sum + e.points, 0);
+      return {
+        counted: [...events],
+        dropped: [],
+        totalPoints,
+      };
+    }
+
+    if (policy.strategy === 'bestNResults') {
+      const count = policy.count ?? events.length;
+      if (count >= events.length) {
+        const totalPoints = events.reduce((sum, e) => sum + e.points, 0);
+        return {
+          counted: [...events],
+          dropped: [],
+          totalPoints,
+        };
+      }
+
+      const sorted = [...events].sort((a, b) => b.points - a.points);
+      const counted = sorted.slice(0, count);
+      const dropped = sorted.slice(count);
+      const totalPoints = counted.reduce((sum, e) => sum + e.points, 0);
+
+      return {
+        counted,
+        dropped,
+        totalPoints,
+      };
+    }
+
+    // For this slice, treat unsupported strategies as 'none'
+    const totalPoints = events.reduce((sum, e) => sum + e.points, 0);
+    return {
+      counted: [...events],
+      dropped: [],
+      totalPoints,
+    };
+  }
+}

packages/racing/domain/services/EventScoringService.ts

@@ -0,0 +1,128 @@
+import type { ChampionshipConfig } from '../value-objects/ChampionshipConfig';
+import type { SessionType } from '../value-objects/SessionType';
+import type { ParticipantRef } from '../value-objects/ParticipantRef';
+import type { Result } from '../entities/Result';
+import type { Penalty } from '../entities/Penalty';
+import type { BonusRule } from '../value-objects/BonusRule';
+import type { ChampionshipType } from '../value-objects/ChampionshipType';
+
+import type { PointsTable } from '../value-objects/PointsTable';
+
+export interface ParticipantEventPoints {
+  participant: ParticipantRef;
+  basePoints: number;
+  bonusPoints: number;
+  penaltyPoints: number;
+  totalPoints: number;
+}
+
+function createDriverParticipant(driverId: string): ParticipantRef {
+  return {
+    type: 'driver' as ChampionshipType,
+    id: driverId,
+  };
+}
+
+export class EventScoringService {
+  scoreSession(params: {
+    seasonId: string;
+    championship: ChampionshipConfig;
+    sessionType: SessionType;
+    results: Result[];
+    penalties: Penalty[];
+  }): ParticipantEventPoints[] {
+    const { championship, sessionType, results } = params;
+
+    const pointsTable = this.getPointsTableForSession(championship, sessionType);
+    const bonusRules = this.getBonusRulesForSession(championship, sessionType);
+
+    const baseByDriver = new Map<string, number>();
+    const bonusByDriver = new Map<string, number>();
+    const penaltyByDriver = new Map<string, number>();
+
+    for (const result of results) {
+      const driverId = result.driverId;
+      const currentBase = baseByDriver.get(driverId) ?? 0;
+      const added = pointsTable.getPointsForPosition(result.position);
+      baseByDriver.set(driverId, currentBase + added);
+    }
+
+    const fastestLapRule = bonusRules.find((r) => r.type === 'fastestLap');
+    if (fastestLapRule) {
+      this.applyFastestLapBonus(fastestLapRule, results, bonusByDriver);
+    }
+
+    const penaltyMap = this.aggregatePenalties(params.penalties);
+    for (const [driverId, value] of penaltyMap.entries()) {
+      penaltyByDriver.set(driverId, value);
+    }
+
+    const allDriverIds = new Set<string>();
+    for (const id of baseByDriver.keys()) allDriverIds.add(id);
+    for (const id of bonusByDriver.keys()) allDriverIds.add(id);
+    for (const id of penaltyByDriver.keys()) allDriverIds.add(id);
+
+    const participants: ParticipantEventPoints[] = [];
+    for (const driverId of allDriverIds) {
+      const basePoints = baseByDriver.get(driverId) ?? 0;
+      const bonusPoints = bonusByDriver.get(driverId) ?? 0;
+      const penaltyPoints = penaltyByDriver.get(driverId) ?? 0;
+      const totalPoints = basePoints + bonusPoints - penaltyPoints;
+
+      participants.push({
+        participant: createDriverParticipant(driverId),
+        basePoints,
+        bonusPoints,
+        penaltyPoints,
+        totalPoints,
+      });
+    }
+
+    return participants;
+  }
+
+  private getPointsTableForSession(
+    championship: ChampionshipConfig,
+    sessionType: SessionType,
+  ): PointsTable {
+    return championship.pointsTableBySessionType[sessionType];
+  }
+
+  private getBonusRulesForSession(
+    championship: ChampionshipConfig,
+    sessionType: SessionType,
+  ): BonusRule[] {
+    const all = championship.bonusRulesBySessionType ?? {};
+    return all[sessionType] ?? [];
+  }
+
+  private applyFastestLapBonus(
+    rule: BonusRule,
+    results: Result[],
+    bonusByDriver: Map<string, number>,
+  ): void {
+    if (results.length === 0) return;
+
+    const sortedByLap = [...results].sort((a, b) => a.fastestLap - b.fastestLap);
+    const best = sortedByLap[0];
+
+    const requiresTop = rule.requiresFinishInTopN;
+    if (typeof requiresTop === 'number') {
+      if (best.position <= 0 || best.position > requiresTop) {
+        return;
+      }
+    }
+
+    const current = bonusByDriver.get(best.driverId) ?? 0;
+    bonusByDriver.set(best.driverId, current + rule.points);
+  }
+
+  private aggregatePenalties(penalties: Penalty[]): Map<string, number> {
+    const map = new Map<string, number>();
+    for (const penalty of penalties) {
+      const current = map.get(penalty.driverId) ?? 0;
+      map.set(penalty.driverId, current + penalty.pointsDelta);
+    }
+    return map;
+  }
+}