LazyObjectState.php

<?php


/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\VarExporter\Internal;

use Symfony\Component\VarExporter\Hydrator as PublicHydrator;

/**
 * Keeps the state of lazy objects.
 *
 * As a micro-optimization, this class uses no type declarations.
 *
 * @internal
 */
class LazyObjectState {
    public const STATUS_UNINITIALIZED_FULL = 1;
    public const STATUS_UNINITIALIZED_PARTIAL = 2;
    public const STATUS_INITIALIZED_FULL = 3;
    public const STATUS_INITIALIZED_PARTIAL = 4;
    
    /**
     * @var self::STATUS_*
     */
    public int $status = self::STATUS_UNINITIALIZED_FULL;
    public object $realInstance;
    
    /**
     * @param array<string, true> $skippedProperties
     */
    public function __construct(\Closure $initializer, array $skippedProperties = []) {
    }
    public function initialize($instance, $propertyName, $propertyScope) {
        if (self::STATUS_UNINITIALIZED_FULL !== $this->status) {
            return $this->status;
        }
        $this->status = self::STATUS_INITIALIZED_PARTIAL;
        try {
            if ($defaultProperties = array_diff_key(LazyObjectRegistry::$defaultProperties[$instance::class], $this->skippedProperties)) {
                PublicHydrator::hydrate($instance, $defaultProperties);
            }
            ($this->initializer)($instance);
        } catch (\Throwable $e) {
            $this->status = self::STATUS_UNINITIALIZED_FULL;
            $this->reset($instance);
            throw $e;
        }
        return $this->status = self::STATUS_INITIALIZED_FULL;
    }
    public function reset($instance) : void {
        $class = $instance::class;
        $propertyScopes = Hydrator::$propertyScopes[$class] ??= Hydrator::getPropertyScopes($class);
        $skippedProperties = $this->skippedProperties;
        $properties = (array) $instance;
        foreach ($propertyScopes as $key => [
            $scope,
            $name,
            $readonlyScope,
        ]) {
            $propertyScopes[$k = "\x00{$scope}\x00{$name}"] ?? $propertyScopes[$k = "\x00*\x00{$name}"] ?? ($k = $name);
            if ($k === $key && (null !== $readonlyScope || !\array_key_exists($k, $properties))) {
                $skippedProperties[$k] = true;
            }
        }
        foreach (LazyObjectRegistry::$classResetters[$class] as $reset) {
            $reset($instance, $skippedProperties);
        }
        foreach ((array) $instance as $name => $value) {
            if ("\x00" !== ($name[0] ?? '') && !\array_key_exists($name, $skippedProperties)) {
                unset($instance->{$name});
            }
        }
        $this->status = self::STATUS_UNINITIALIZED_FULL;
    }

}