68 lines
2.2 KiB
TypeScript
68 lines
2.2 KiB
TypeScript
import { Result } from '@core/shared/application/Result';
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import type { ApplicationErrorCode } from '@core/shared/errors/ApplicationErrorCode';
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import type { Driver } from '../../domain/entities/Driver';
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import type { IStandingRepository } from '../../domain/repositories/IStandingRepository';
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import type { IDriverRepository } from '../../domain/repositories/IDriverRepository';
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export type GetLeagueStandingsErrorCode = 'REPOSITORY_ERROR';
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export type GetLeagueStandingsInput = {
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leagueId: string;
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};
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export type LeagueStandingItem = {
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driverId: string;
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driver: Driver;
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points: number;
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rank: number;
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};
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export type GetLeagueStandingsResult = {
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standings: LeagueStandingItem[];
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};
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/**
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* Use Case for retrieving league standings.
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*/
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export class GetLeagueStandingsUseCase {
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constructor(
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private readonly standingRepository: IStandingRepository,
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private readonly driverRepository: IDriverRepository,
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) {}
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async execute(
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input: GetLeagueStandingsInput,
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): Promise<
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Result<GetLeagueStandingsResult, ApplicationErrorCode<GetLeagueStandingsErrorCode, { message: string }>>
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> {
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try {
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const standings = await this.standingRepository.findByLeagueId(input.leagueId);
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const driverIds = [...new Set(standings.map(s => s.driverId.toString()))];
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const driverPromises = driverIds.map(id => this.driverRepository.findById(id));
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const driverResults = await Promise.all(driverPromises);
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const drivers = driverResults.filter(
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(driver): driver is NonNullable<(typeof driverResults)[number]> => driver !== null,
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);
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const driverMap = new Map(drivers.map(driver => [driver.id, driver]));
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const result: GetLeagueStandingsResult = {
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standings: standings.map(standing => ({
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driverId: standing.driverId.toString(),
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driver: driverMap.get(standing.driverId.toString())!,
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points: standing.points.toNumber(),
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rank: standing.position.toNumber(),
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})),
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};
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return Result.ok(result);
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} catch (error) {
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return Result.err({
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code: 'REPOSITORY_ERROR',
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details: {
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message:
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error instanceof Error ? error.message : 'Failed to fetch league standings',
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},
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});
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}
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}
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} |