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Filename : DefinitionErrorExceptionPass.php
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<?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\DependencyInjection\Compiler;

use Symfony\Component\DependencyInjection\Argument\ArgumentInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\DependencyInjection\Definition;
use Symfony\Component\DependencyInjection\Exception\RuntimeException;
use Symfony\Component\DependencyInjection\Reference;

/**
 * Throws an exception for any Definitions that have errors and still exist.
 *
 * @author Ryan Weaver <ryan@knpuniversity.com>
 */
class DefinitionErrorExceptionPass extends AbstractRecursivePass
{
    private $erroredDefinitions = [];
    private $sourceReferences = [];

    /**
     * @return void
     */
    public function process(ContainerBuilder $container)
    {
        try {
            parent::process($container);

            $visitedIds = [];

            foreach ($this->erroredDefinitions as $id => $definition) {
                if ($this->isErrorForRuntime($id, $visitedIds)) {
                    continue;
                }

                // only show the first error so the user can focus on it
                $errors = $definition->getErrors();

                throw new RuntimeException(reset($errors));
            }
        } finally {
            $this->erroredDefinitions = [];
            $this->sourceReferences = [];
        }
    }

    /**
     * {@inheritdoc}
     */
    protected function processValue($value, bool $isRoot = false)
    {
        if ($value instanceof ArgumentInterface) {
            parent::processValue($value->getValues());

            return $value;
        }

        if ($value instanceof Reference && $this->currentId !== $targetId = (string) $value) {
            if (ContainerInterface::RUNTIME_EXCEPTION_ON_INVALID_REFERENCE === $value->getInvalidBehavior()) {
                $this->sourceReferences[$targetId][$this->currentId] ?? $this->sourceReferences[$targetId][$this->currentId] = true;
            } else {
                $this->sourceReferences[$targetId][$this->currentId] = false;
            }

            return $value;
        }

        if (!$value instanceof Definition || !$value->hasErrors()) {
            return parent::processValue($value, $isRoot);
        }

        $this->erroredDefinitions[$this->currentId] = $value;

        return parent::processValue($value);
    }

    private function isErrorForRuntime(string $id, array &$visitedIds): bool
    {
        if (!isset($this->sourceReferences[$id])) {
            return false;
        }

        if (isset($visitedIds[$id])) {
            return $visitedIds[$id];
        }

        $visitedIds[$id] = true;

        foreach ($this->sourceReferences[$id] as $sourceId => $isRuntime) {
            if ($visitedIds[$sourceId] ?? $visitedIds[$sourceId] = $this->isErrorForRuntime($sourceId, $visitedIds)) {
                continue;
            }

            if (!$isRuntime) {
                return false;
            }
        }

        return true;
    }
}