dtable-utils/es/common.js

dtable common utils

import _typeof from '@babel/runtime/helpers/typeof';

/**
 * Generate a random string of specified length.
 * @param {number} keyLength
 * @returns random code, string
 */
var generatorBase64Code = function generatorBase64Code() {
  var keyLength = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 4;
  var possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz0123456789';
  var key = '';
  for (var i = 0; i < keyLength; i++) {
    key += possible.charAt(Math.floor(Math.random() * possible.length));
  }
  return key;
};

/**
 * Check whether the given value is empty
 * @param {any} val
 * @returns bool
 */
var isEmpty = function isEmpty(val) {
  if (val === null || val === undefined) return true;
  if (val.length !== undefined) return val.length === 0;
  if (val instanceof Date) return false;
  if (_typeof(val) === 'object') return Object.keys(val).length === 0;
  return false;
};

/**
 * Check whether the object is empty.
 * The true will be returned if the "obj" is invalid.
 * @param {object} obj
 * @returns bool
 */
var isEmptyObject = function isEmptyObject(obj) {
  var name;
  // eslint-disable-next-line
  for (name in obj) {
    return false;
  }
  return true;
};
var hasOwnProperty = function hasOwnProperty(obj, key) {
  return Object.prototype.hasOwnProperty.call(obj, key);
};

export { generatorBase64Code, hasOwnProperty, isEmpty, isEmptyObject };