"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }(); /**
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * Copyright (c) 2017-present, Facebook, Inc.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * All rights reserved.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          *
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * This source code is licensed under the BSD-style license found in the
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * LICENSE file in the root directory of this source tree. An additional grant
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          * of patent rights can be found in the PATENTS file in the same directory.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          */

exports.default = function (realm) {
  // ECMA262 26.2.1.1
  var func = new _index.NativeFunctionValue(realm, "Proxy", "Proxy", 2, function (context, _ref, argCount, NewTarget) {
    var _ref2 = _slicedToArray(_ref, 2),
        target = _ref2[0],
        handler = _ref2[1];

    // 1. If NewTarget is undefined, throw a TypeError exception.
    if (!NewTarget) {
      throw realm.createErrorThrowCompletion(realm.intrinsics.TypeError);
    }

    // 2. Return ? ProxyCreate(target, handler).
    return (0, _proxy.ProxyCreate)(realm, target, handler);
  });

  // ECMA262 26.2.2.1
  func.defineNativeMethod("revocable", 2, function (context, _ref3) {
    var _ref4 = _slicedToArray(_ref3, 2),
        target = _ref4[0],
        handler = _ref4[1];

    // 1. Let p be ? ProxyCreate(target, handler).
    var p = (0, _proxy.ProxyCreate)(realm, target, handler);

    // 2. Let revoker be a new built-in function object as defined in 26.2.2.1.1.
    var revoker = createRevoker();

    // 3. Set the [[RevocableProxy]] internal slot of revoker to p.
    revoker.$RevocableProxy = p;

    // 4. Let result be ObjectCreate(%ObjectPrototype%).
    var result = _singletons.Create.ObjectCreate(realm, realm.intrinsics.ObjectPrototype);

    // 5. Perform CreateDataProperty(result, "proxy", p).
    _singletons.Create.CreateDataProperty(realm, result, "proxy", p);

    // 6. Perform CreateDataProperty(result, "revoke", revoker).
    _singletons.Create.CreateDataProperty(realm, result, "revoke", revoker);

    // 7. Return result.
    return result;
  });

  function createRevoker() {
    var F = new _index.NativeFunctionValue(realm, undefined, undefined, 0, function (context, _ref5, argCount, NewTarget) {
      var _ref6 = _slicedToArray(_ref5, 2),
          target = _ref6[0],
          handler = _ref6[1];

      // 1. Let p be the value of F's [[RevocableProxy]] internal slot.
      var p = F.$RevocableProxy;

      // 2. If p is null, return undefined.
      if (p instanceof _index.NullValue) return realm.intrinsics.undefined;

      // 3. Set the value of F's [[RevocableProxy]] internal slot to null.
      F.$RevocableProxy = realm.intrinsics.null;

      // 4. Assert: p is a Proxy object.
      (0, _invariant2.default)(p instanceof _index.ProxyValue, "expected proxy");

      // 5. Set the [[ProxyTarget]] internal slot of p to null.
      p.$ProxyTarget = realm.intrinsics.null;

      // 6. Set the [[ProxyHandler]] internal slot of p to null.
      p.$ProxyHandler = realm.intrinsics.null;

      // 7. Return undefined.
      return realm.intrinsics.undefined;
    }, false);

    return F;
  }

  return func;
};

var _index = require("../../values/index.js");

var _singletons = require("../../singletons.js");

var _proxy = require("../../methods/proxy.js");

var _invariant = require("../../invariant.js");

var _invariant2 = _interopRequireDefault(_invariant);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
//# sourceMappingURL=Proxy.js.map