import { ArgumentMetadata, Injectable, PipeTransform } from '@nestjs/common';
import { plainToClass } from 'class-transformer';

@Injectable()
export class SanitizePipe implements PipeTransform {
  transform(value: any, metadata: ArgumentMetadata) {
    if (
      !(value instanceof Object) ||
      value instanceof Buffer ||
      value instanceof Array
    ) {
      return value;
    }
    const constructorFunction = metadata.metatype;
    if (!constructorFunction || value instanceof constructorFunction) {
      return value;
    }
    try {
      return plainToClass(constructorFunction, value);
    } catch (err) {
      console.error(err);
      throw err;
    }
  }
}