import { BaseDataLoaderService, Level, LevelService } from "@cv/core";
import { Injectable, Scope } from "@nestjs/common";

@Injectable({ scope: Scope.REQUEST })
export class LevelDataLoaderService extends BaseDataLoaderService<
  string,
  Level
> {
  constructor(readonly levelService: LevelService) {
    super(async (ids: readonly string[]) => {
      const levels = await levelService.findMany({ id: [...ids] });

      const levelMap = new Map<string, Level>();
      for (const level of levels) {
        levelMap.set(level.id, level);
      }

      return ids.map((id) => levelMap.get(id) ?? null);
    });
  }
}