import { BadRequestException, Injectable, PipeTransform } from "@nestjs/common";

/**
 * Pipe to ensure a value is not empty.
 */
@Injectable()
export class NotEmptyPipe implements PipeTransform {
  constructor(private readonly fieldName: string) {}

  transform(value: any) {
    if (!value || Object.keys(value).length === 0) {
      throw new BadRequestException(`${this.fieldName} cannot be empty`);
    }
    return value;
  }
}