source: imaps-frontend/node_modules/es-abstract/2016/SetIntegrityLevel.js@ 79a0317

'use strict';

var GetIntrinsic = require('get-intrinsic');

var $SyntaxError = require('es-errors/syntax');
var $TypeError = require('es-errors/type');
var $preventExtensions = GetIntrinsic('%Object.preventExtensions%', true);
var $gOPD = require('gopd');
var $gOPN = GetIntrinsic('%Object.getOwnPropertyNames%', true);

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

var DefinePropertyOrThrow = require('./DefinePropertyOrThrow');
var IsAccessorDescriptor = require('./IsAccessorDescriptor');
var ToPropertyDescriptor = require('./ToPropertyDescriptor');

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

// https://262.ecma-international.org/6.0/#sec-setintegritylevel

module.exports = function SetIntegrityLevel(O, level) {
        if (!isObject(O)) {
                throw new $TypeError('Assertion failed: Type(O) is not Object');
        }
        if (level !== 'sealed' && level !== 'frozen') {
                throw new $TypeError('Assertion failed: `level` must be `"sealed"` or `"frozen"`');
        }
        if (!$preventExtensions) {
                throw new $SyntaxError('SetIntegrityLevel requires native `Object.preventExtensions` support');
        }
        var status = $preventExtensions(O);
        if (!status) {
                return false;
        }
        if (!$gOPN) {
                throw new $SyntaxError('SetIntegrityLevel requires native `Object.getOwnPropertyNames` support');
        }
        var theKeys = $gOPN(O);
        if (level === 'sealed') {
                forEach(theKeys, function (k) {
                        DefinePropertyOrThrow(O, k, { configurable: false });
                });
        } else if (level === 'frozen') {
                forEach(theKeys, function (k) {
                        var currentDesc = $gOPD(O, k);
                        if (typeof currentDesc !== 'undefined') {
                                var desc;
                                if (IsAccessorDescriptor(ToPropertyDescriptor(currentDesc))) {
                                        desc = { configurable: false };
                                } else {
                                        desc = { configurable: false, writable: false };
                                }
                                DefinePropertyOrThrow(O, k, desc);
                        }
                });
        }
        return true;
};