javascript-decorators/lib/@immutablors.js

Decorator Helpers

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports._doesNotMutate = exports._immutable = undefined;

var _deepcopy = require('deepcopy');

var _deepcopy2 = _interopRequireDefault(_deepcopy);

var _deepEqual = require('deep-equal');

var _deepEqual2 = _interopRequireDefault(_deepEqual);

var _helpers = require('./helpers');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Base decorator function for immutability
 *
 * @method _basefunc
 *
 *
 * @return { function }  decorator function
 */
var _immutable = exports._immutable = function _immutable() {
  return function (key, target, descriptor) {
    var func = descriptor.value;
    (0, _helpers.descriptorIsFunc)(key, func);
    descriptor.value = function () {
      for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
        args[_key] = arguments[_key];
      }

      var newArgs = args.reduce(function (previousval, currentval) {
        previousval.push((0, _deepcopy2.default)(currentval));
        return previousval;
      }, []);
      return func.apply(this, newArgs);
    };
    return descriptor;
  };
}; /**
   * Mutability related decorators
   *
   * @author  Avraam Mavridis      <avr.mav@gmail.com>
   *
   */

var _doesNotMutate = exports._doesNotMutate = function _doesNotMutate() {
  return function (key, target, descriptor) {
    var func = descriptor.value;
    (0, _helpers.descriptorIsFunc)(key, func);
    descriptor.value = function () {
      for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
        args[_key2] = arguments[_key2];
      }

      var tempArgs = (0, _deepcopy2.default)(args);
      var returnValue = func.apply(this, args);
      if (!(0, _deepEqual2.default)(args, tempArgs)) {
        throw Error(target + ' mutates the passed values');
      }
      return returnValue;
    };
    return descriptor;
  };
};