/**
 * getUrlParameter
 * @param  {string} arg_key
 * @returns {string | TRUE}
 */
export function getUrlParameter(arg_key) {
  let searchStr = window.location.search.substring(1),
    paramList = searchStr.split('&');

  for (let i = 0; i < paramList.length; i++) {
    let paramPair = paramList[i].split('=');

    if (paramPair[0] === arg_key) {
      return paramPair[1] === undefined
        ? true
        : decodeURIComponent(paramPair[1]);
    }
  }
}

/**
 * 深冻结函数
 */
export function deepFreeze(o) {
  const oIsFunction = typeof o === 'function';
  const hasOwnProp = Object.prototype.hasOwnProperty;

  Object.getOwnPropertyNames(o).forEach(function(name) {
    const prop = o[name];
    if (
      hasOwnProp.call(o, name) &&
      (oIsFunction
        ? name !== 'caller' && name !== 'callee' && name !== 'arguments'
        : true) &&
      prop !== null &&
      (typeof prop === 'object' || typeof prop === 'function') &&
      !Object.isFrozen(prop)
    ) {
      deepFreeze(prop);
    }
  });

  return Object.freeze(o);
}