gistfile1.txt

import { flattenObject } from 'flatten-anything';
import { nestifyObject } from 'nestify-anything';

import { JSONValue, JSONObject } from './types';
import { isSerializable, isPlainObject, serializeExtraTypes } from './utils';

export const serialize = (input: any) => {
  let json: JSONValue = {};
  let meta: JSONObject | string = {};

  if (isSerializable(input)) {
    json = input;
    return { json, meta };
  }

  if (Array.isArray(input)) {
    let output = [];

    for (let i = 0, len = input.length; i < len; i++) {
      const value = input[i];

      if (isSerializable(value)) {
        output.push(value);
      } else {
        output.push(serializeExtraTypes(value).value);
        meta[i] = serializeExtraTypes(value).type;
      }
    }

    json = output;

    return { json, meta };
  }

  if (!isPlainObject(input)) {
    json = serializeExtraTypes(input).value;
    meta = serializeExtraTypes(input).type;
    return { json, meta };
  }

  if (isPlainObject(input)) {
    const flattened = flattenObject(input);

    for (let i = 0, len = Object.keys(flattened).length; i < len; i++) {
      const key = Object.keys(flattened)[i];
      const value = Object.values(flattened)[i];

      if (isSerializable(value)) {
        json[key] = value;
      } else {
        json[key] = serializeExtraTypes(value).value;
        meta[key] = serializeExtraTypes(value).type;
      }
    }

    // @ts-expect-error
    json = nestifyObject(json);

    return { json, meta };
  }

  throw new Error('invalid input');
};