A sanitizer for mongo response

june_sanitizer.ts

const toString = Object.prototype.toString;


type MaybeObjArrStrNum =
  | { [x: string]: MaybeObjArrStrNum }
  | (MaybeObjArrStrNum | string | number)[]
  | string
  | number;

export function sanitizeResponse(data: {
  [x: string]: MaybeObjArrStrNum;
}): { [x: string]: any } | { [x: string]: any }[] {
  function sanitizeObject(data: { [x: string]: string | number }) {
    return Object.keys(data).reduce(
      (o, key) => (key.startsWith('_') ? { ...o } : { ...o, [key]: data[key] }),
      {},
    );
  }

  function sanitizeArray(dat: (MaybeObjArrStrNum | string | number)[]): any[] {
    return dat.map((el) => {
      if (Array.isArray(el)) return sanitizeArray(el);
      if (el.toString() === '[object Object]') return sanitizeResponse(el as any);
      return el;
    });
  }

  return Object.keys(data).reduce<{ [x: string]: any }>((o, key) => {
    if (!key.startsWith('_')) {
      if (
        toString.call(data[key]) === '[object Object]' &&
        Object.values(data[key]).every(
          (value) => !['[object Object]', '[object Array]'].includes(toString.call(value)),
        )
      ) {
        o[key] = sanitizeObject(data[key] as any);
      } else if (
        toString.call(data[key]) === '[object String]' ||
        toString.call(data[key]) === '[object Number]'
      ) {
        o[key] = data[key];
      } else if (Array.isArray(data[key])) {
        o[key] = sanitizeArray(data[key] as any[]);
      } else if (toString.call(data[key]) === '[object Object]') {
        o[key] = sanitizeResponse(data[key] as any);
      } else {
        o[key] = data[key];
      }
    }
    return o;
  }, {});
}