74 lines
2.4 KiB
TypeScript
74 lines
2.4 KiB
TypeScript
import { Result } from '@core/shared/domain/Result';
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import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
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import type { LeagueMembershipRepository } from '../../domain/repositories/LeagueMembershipRepository';
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import type { RaceRepository } from '../../domain/repositories/RaceRepository';
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export interface GetLeagueStatsInput {
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leagueId: string;
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}
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export interface GetLeagueStatsResult {
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leagueId: string;
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driverCount: number;
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raceCount: number;
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averageRating: number;
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}
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export type GetLeagueStatsErrorCode = 'LEAGUE_NOT_FOUND' | 'REPOSITORY_ERROR';
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export class GetLeagueStatsUseCase {
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constructor(
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private readonly leagueMembershipRepository: LeagueMembershipRepository,
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private readonly raceRepository: RaceRepository,
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private readonly getDriverRating: (input: {
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driverId: string;
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}) => Promise<{ rating: number | null; ratingChange: number | null }>,
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) {}
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async execute(
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input: GetLeagueStatsInput,
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): Promise<Result<GetLeagueStatsResult, ApplicationErrorCode<GetLeagueStatsErrorCode, { message: string }>>> {
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try {
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const memberships = await this.leagueMembershipRepository.getLeagueMembers(input.leagueId);
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if (memberships.length === 0) {
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return Result.err({
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code: 'LEAGUE_NOT_FOUND',
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details: { message: 'League not found' },
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});
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}
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const races = await this.raceRepository.findByLeagueId(input.leagueId);
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const driverIds = memberships.map(membership => String(membership.driverId));
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const ratingPromises = driverIds.map(driverId => this.getDriverRating({ driverId }));
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const ratingResults = await Promise.all(ratingPromises);
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const validRatings = ratingResults
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.map(result => result.rating)
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.filter((rating): rating is number => rating !== null);
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const averageRating =
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validRatings.length > 0
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? Math.round(validRatings.reduce((sum, rating) => sum + rating, 0) / validRatings.length)
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: 0;
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const result: GetLeagueStatsResult = {
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leagueId: input.leagueId,
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driverCount: memberships.length,
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raceCount: races.length,
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averageRating,
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};
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return Result.ok(result);
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} catch (error) {
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const message =
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error instanceof Error && error.message ? error.message : 'Failed to fetch league stats';
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return Result.err({
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code: 'REPOSITORY_ERROR',
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details: { message },
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});
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}
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}
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} |