source: imaps-frontend/node_modules/es-abstract/2019/ValidateAndApplyPropertyDescriptor.js@ d565449

'use strict';

var $TypeError = require('es-errors/type');

var DefineOwnProperty = require('../helpers/DefineOwnProperty');
var isPropertyDescriptor = require('../helpers/records/property-descriptor');
var isSamePropertyDescriptor = require('../helpers/isSamePropertyDescriptor');

var FromPropertyDescriptor = require('./FromPropertyDescriptor');
var IsAccessorDescriptor = require('./IsAccessorDescriptor');
var IsDataDescriptor = require('./IsDataDescriptor');
var IsGenericDescriptor = require('./IsGenericDescriptor');
var IsPropertyKey = require('./IsPropertyKey');
var SameValue = require('./SameValue');
var Type = require('./Type');

// https://262.ecma-international.org/6.0/#sec-validateandapplypropertydescriptor
// https://262.ecma-international.org/8.0/#sec-validateandapplypropertydescriptor

// eslint-disable-next-line max-lines-per-function, max-statements
module.exports = function ValidateAndApplyPropertyDescriptor(O, P, extensible, Desc, current) {
        // this uses the ES2017+ logic, since it fixes a number of bugs in the ES2015 logic.
        var oType = Type(O);
        if (oType !== 'Undefined' && oType !== 'Object') {
                throw new $TypeError('Assertion failed: O must be undefined or an Object');
        }
        if (typeof extensible !== 'boolean') {
                throw new $TypeError('Assertion failed: extensible must be a Boolean');
        }
        if (!isPropertyDescriptor(Desc)) {
                throw new $TypeError('Assertion failed: Desc must be a Property Descriptor');
        }
        if (typeof current !== 'undefined' && !isPropertyDescriptor(current)) {
                throw new $TypeError('Assertion failed: current must be a Property Descriptor, or undefined');
        }
        if (oType !== 'Undefined' && !IsPropertyKey(P)) {
                throw new $TypeError('Assertion failed: if O is not undefined, P must be a Property Key');
        }
        if (typeof current === 'undefined') {
                if (!extensible) {
                        return false;
                }
                if (IsGenericDescriptor(Desc) || IsDataDescriptor(Desc)) {
                        if (oType !== 'Undefined') {
                                DefineOwnProperty(
                                        IsDataDescriptor,
                                        SameValue,
                                        FromPropertyDescriptor,
                                        O,
                                        P,
                                        {
                                                '[[Configurable]]': Desc['[[Configurable]]'],
                                                '[[Enumerable]]': Desc['[[Enumerable]]'],
                                                '[[Value]]': Desc['[[Value]]'],
                                                '[[Writable]]': Desc['[[Writable]]']
                                        }
                                );
                        }
                } else {
                        if (!IsAccessorDescriptor(Desc)) {
                                throw new $TypeError('Assertion failed: Desc is not an accessor descriptor');
                        }
                        if (oType !== 'Undefined') {
                                return DefineOwnProperty(
                                        IsDataDescriptor,
                                        SameValue,
                                        FromPropertyDescriptor,
                                        O,
                                        P,
                                        Desc
                                );
                        }
                }
                return true;
        }
        if (IsGenericDescriptor(Desc) && !('[[Configurable]]' in Desc) && !('[[Enumerable]]' in Desc)) {
                return true;
        }
        if (isSamePropertyDescriptor({ SameValue: SameValue }, Desc, current)) {
                return true; // removed by ES2017, but should still be correct
        }
        // "if every field in Desc is absent, return true" can't really match the assertion that it's a Property Descriptor
        if (!current['[[Configurable]]']) {
                if (Desc['[[Configurable]]']) {
                        return false;
                }
                if ('[[Enumerable]]' in Desc && !Desc['[[Enumerable]]'] === !!current['[[Enumerable]]']) {
                        return false;
                }
        }
        if (IsGenericDescriptor(Desc)) {
                // no further validation is required.
        } else if (IsDataDescriptor(current) !== IsDataDescriptor(Desc)) {
                if (!current['[[Configurable]]']) {
                        return false;
                }
                if (IsDataDescriptor(current)) {
                        if (oType !== 'Undefined') {
                                DefineOwnProperty(
                                        IsDataDescriptor,
                                        SameValue,
                                        FromPropertyDescriptor,
                                        O,
                                        P,
                                        {
                                                '[[Configurable]]': current['[[Configurable]]'],
                                                '[[Enumerable]]': current['[[Enumerable]]'],
                                                '[[Get]]': undefined
                                        }
                                );
                        }
                } else if (oType !== 'Undefined') {
                        DefineOwnProperty(
                                IsDataDescriptor,
                                SameValue,
                                FromPropertyDescriptor,
                                O,
                                P,
                                {
                                        '[[Configurable]]': current['[[Configurable]]'],
                                        '[[Enumerable]]': current['[[Enumerable]]'],
                                        '[[Value]]': undefined
                                }
                        );
                }
        } else if (IsDataDescriptor(current) && IsDataDescriptor(Desc)) {
                if (!current['[[Configurable]]'] && !current['[[Writable]]']) {
                        if ('[[Writable]]' in Desc && Desc['[[Writable]]']) {
                                return false;
                        }
                        if ('[[Value]]' in Desc && !SameValue(Desc['[[Value]]'], current['[[Value]]'])) {
                                return false;
                        }
                        return true;
                }
        } else if (IsAccessorDescriptor(current) && IsAccessorDescriptor(Desc)) {
                if (!current['[[Configurable]]']) {
                        if ('[[Set]]' in Desc && !SameValue(Desc['[[Set]]'], current['[[Set]]'])) {
                                return false;
                        }
                        if ('[[Get]]' in Desc && !SameValue(Desc['[[Get]]'], current['[[Get]]'])) {
                                return false;
                        }
                        return true;
                }
        } else {
                throw new $TypeError('Assertion failed: current and Desc are not both data, both accessors, or one accessor and one data.');
        }
        if (oType !== 'Undefined') {
                return DefineOwnProperty(
                        IsDataDescriptor,
                        SameValue,
                        FromPropertyDescriptor,
                        O,
                        P,
                        Desc
                );
        }
        return true;
};