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Filename : Compiler.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\ContainerBuilder;
use Symfony\Component\DependencyInjection\Exception\EnvParameterException;

/**
 * This class is used to remove circular dependencies between individual passes.
 *
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 */
class Compiler
{
    private $passConfig;
    private $log = [];
    private $serviceReferenceGraph;

    public function __construct()
    {
        $this->passConfig = new PassConfig();
        $this->serviceReferenceGraph = new ServiceReferenceGraph();
    }

    /**
     * Returns the PassConfig.
     *
     * @return PassConfig The PassConfig instance
     */
    public function getPassConfig()
    {
        return $this->passConfig;
    }

    /**
     * Returns the ServiceReferenceGraph.
     *
     * @return ServiceReferenceGraph The ServiceReferenceGraph instance
     */
    public function getServiceReferenceGraph()
    {
        return $this->serviceReferenceGraph;
    }

    /**
     * Adds a pass to the PassConfig.
     */
    public function addPass(CompilerPassInterface $pass, string $type = PassConfig::TYPE_BEFORE_OPTIMIZATION, int $priority = 0)
    {
        $this->passConfig->addPass($pass, $type, $priority);
    }

    /**
     * @final
     */
    public function log(CompilerPassInterface $pass, string $message)
    {
        if (str_contains($message, "\n")) {
            $message = str_replace("\n", "\n".\get_class($pass).': ', trim($message));
        }

        $this->log[] = \get_class($pass).': '.$message;
    }

    /**
     * Returns the log.
     *
     * @return array Log array
     */
    public function getLog()
    {
        return $this->log;
    }

    /**
     * Run the Compiler and process all Passes.
     */
    public function compile(ContainerBuilder $container)
    {
        try {
            foreach ($this->passConfig->getPasses() as $pass) {
                $pass->process($container);
            }
        } catch (\Exception $e) {
            $usedEnvs = [];
            $prev = $e;

            do {
                $msg = $prev->getMessage();

                if ($msg !== $resolvedMsg = $container->resolveEnvPlaceholders($msg, null, $usedEnvs)) {
                    $r = new \ReflectionProperty($prev, 'message');
                    $r->setAccessible(true);
                    $r->setValue($prev, $resolvedMsg);
                }
            } while ($prev = $prev->getPrevious());

            if ($usedEnvs) {
                $e = new EnvParameterException($usedEnvs, $e);
            }

            throw $e;
        } finally {
            $this->getServiceReferenceGraph()->clear();
        }
    }
}