sequelize-querystring-converter/lib/helpers.js

Enable filter, sort, paginate and search on your dataset by simply adding some query parameters on your API.

const parseValue = value => {
  try {
    if (['null', 'true', 'false'].includes(value)) {
      return JSON.parse(value); 
    }

    return value;
  } catch (error) {
    return value;
  }
}

const uniqBy = (arr, predicate) => {
  const cb = typeof predicate === 'function' ? predicate : (o) => o[predicate];

  return [...arr.reduce((map, item) => {
    const key = (item === null || item === undefined) ?
      item : cb(item);

    map.has(key) || map.set(key, item);

    return map;
  }, new Map()).values()];
};

const pickBy = (object) => {
  const obj = {};
  for (const key in object) {
    if (object[key] !== null && object[key] !== false && object[key] !== undefined) {
      obj[key] = object[key];
    }
  }
  return obj;
};

const uniq = (array) => {
  return [...new Set(array)];
};

const pick = (object, keys) => {
  return keys.reduce((obj, key) => {
    if (object && object.hasOwnProperty(key)) {
      obj[key] = object[key];
    }
    return obj;
  }, {});
};

module.exports = { parseValue, uniqBy, pickBy, uniq, pick };