ih-black-lion/lib/serialize.js

State handler for Arus projects

import { clone, isArrayLike as isArray, keys, reject } from 'ramda';

const toCamelCase = (str) => {
  const words = str.toLowerCase().split('_');
  let camelCase = '';
  for (let i = 0; i < words.length; i += 1) {
    if (i > 0) {
      words[i] = words[i][0].toUpperCase() + words[i].substr(1);
    }
    camelCase += words[i];
  }
  return camelCase;
};

const serializeKeys = (keyArray, obj) => {
  const res = {};
  for (let i = 0; i < keyArray.length; i += 1) {
    const key = keyArray[i];
    const fieldName = toCamelCase(key);
    let value = obj[key];
    if (isArray(value) && value.length === 1) {
      value = value[0];
    }
    if (typeof value === 'object') {
      // If value is indexed like an array
      if (isArray(value)) {
        const values = [];
        for (let j = 0; value[j] !== undefined; j += 1) {
          values.push(serialize(value[j]));
        }
        value = values;
      } else {
        value = serialize(value);
      }
    }

    res[fieldName] = value;
  }
  return res;
};

export default function serialize(obj) {
  const metadata = clone(obj.$);
  // Grabs the keys from `obj` omitting the `$` key that is usually present
  const keyArray = reject(key => key === '$', keys(obj));
  // If meta data existed then set it to the value of `meta` in `obj`
  if (metadata) {
    obj.meta = metadata;
    keyArray.push('meta');
  }
  return serializeKeys(keyArray, obj);
}