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Editing: InlineServiceDefinitionsPass.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\DependencyInjection\Compiler;

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

/**
 * Inline service definitions where this is possible.
 *
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 */
class InlineServiceDefinitionsPass extends AbstractRecursivePass
{
    private $analyzingPass;
    private $cloningIds = [];
    private $connectedIds = [];
    private $notInlinedIds = [];
    private $inlinedIds = [];
    private $notInlinableIds = [];
    private $graph;

public function __construct(AnalyzeServiceReferencesPass $analyzingPass = null)
    {
        $this->analyzingPass = $analyzingPass;
    }

public function process(ContainerBuilder $container)
    {
        $this->container = $container;
        if ($this->analyzingPass) {
            $analyzedContainer = new ContainerBuilder();
            $analyzedContainer->setAliases($container->getAliases());
            $analyzedContainer->setDefinitions($container->getDefinitions());
            foreach ($container->getExpressionLanguageProviders() as $provider) {
                $analyzedContainer->addExpressionLanguageProvider($provider);
            }
        } else {
            $analyzedContainer = $container;
        }
        try {
            $remainingInlinedIds = [];
            $this->connectedIds = $this->notInlinedIds = $container->getDefinitions();
            do {
                if ($this->analyzingPass) {
                    $analyzedContainer->setDefinitions(array_intersect_key($analyzedContainer->getDefinitions(), $this->connectedIds));
                    $this->analyzingPass->process($analyzedContainer);
                }
                $this->graph = $analyzedContainer->getCompiler()->getServiceReferenceGraph();
                $notInlinedIds = $this->notInlinedIds;
                $this->connectedIds = $this->notInlinedIds = $this->inlinedIds = [];

foreach ($analyzedContainer->getDefinitions() as $id => $definition) {
                    if (!$this->graph->hasNode($id)) {
                        continue;
                    }
                    foreach ($this->graph->getNode($id)->getOutEdges() as $edge) {
                        if (isset($notInlinedIds[$edge->getSourceNode()->getId()])) {
                            $this->currentId = $id;
                            $this->processValue($definition, true);
                            break;
                        }
                    }
                }

foreach ($this->inlinedIds as $id => $isPublicOrNotShared) {
                    if ($isPublicOrNotShared) {
                        $remainingInlinedIds[$id] = $id;
                    } else {
                        $container->removeDefinition($id);
                        $analyzedContainer->removeDefinition($id);
                    }
                }
            } while ($this->inlinedIds && $this->analyzingPass);

foreach ($remainingInlinedIds as $id) {
                if (isset($this->notInlinableIds[$id])) {
                    continue;
                }

$definition = $container->getDefinition($id);

if (!$definition->isShared() && !$definition->isPublic()) {
                    $container->removeDefinition($id);
                }
            }
        } finally {
            $this->container = null;
            $this->connectedIds = $this->notInlinedIds = $this->inlinedIds = [];
            $this->notInlinableIds = [];
            $this->graph = null;
        }
    }

/**
     * {@inheritdoc}
     */
    protected function processValue($value, bool $isRoot = false)
    {
        if ($value instanceof ArgumentInterface) {
            // References found in ArgumentInterface::getValues() are not inlineable
            return $value;
        }

if ($value instanceof Definition && $this->cloningIds) {
            if ($value->isShared()) {
                return $value;
            }
            $value = clone $value;
        }

if (!$value instanceof Reference) {
            return parent::processValue($value, $isRoot);
        } elseif (!$this->container->hasDefinition($id = (string) $value)) {
            return $value;
        }

$definition = $this->container->getDefinition($id);

if (!$this->isInlineableDefinition($id, $definition)) {
            $this->notInlinableIds[$id] = true;

return $value;
        }

$this->container->log($this, sprintf('Inlined service "%s" to "%s".', $id, $this->currentId));
        $this->inlinedIds[$id] = $definition->isPublic() || !$definition->isShared();
        $this->notInlinedIds[$this->currentId] = true;

if ($definition->isShared()) {
            return $definition;
        }

if (isset($this->cloningIds[$id])) {
            $ids = array_keys($this->cloningIds);
            $ids[] = $id;

throw new ServiceCircularReferenceException($id, \array_slice($ids, array_search($id, $ids)));
        }

$this->cloningIds[$id] = true;
        try {
            return $this->processValue($definition);
        } finally {
            unset($this->cloningIds[$id]);
        }
    }

/**
     * Checks if the definition is inlineable.
     */
    private function isInlineableDefinition(string $id, Definition $definition): bool
    {
        if ($definition->hasErrors() || $definition->isDeprecated() || $definition->isLazy() || $definition->isSynthetic() || $definition->hasTag('container.do_not_inline')) {
            return false;
        }

if (!$definition->isShared()) {
            if (!$this->graph->hasNode($id)) {
                return true;
            }

foreach ($this->graph->getNode($id)->getInEdges() as $edge) {
                $srcId = $edge->getSourceNode()->getId();
                $this->connectedIds[$srcId] = true;
                if ($edge->isWeak() || $edge->isLazy()) {
                    return !$this->connectedIds[$id] = true;
                }
            }

return true;
        }

if ($definition->isPublic()) {
            return false;
        }

if (!$this->graph->hasNode($id)) {
            return true;
        }

if ($this->currentId == $id) {
            return false;
        }
        $this->connectedIds[$id] = true;

$srcIds = [];
        $srcCount = 0;
        foreach ($this->graph->getNode($id)->getInEdges() as $edge) {
            $srcId = $edge->getSourceNode()->getId();
            $this->connectedIds[$srcId] = true;
            if ($edge->isWeak() || $edge->isLazy()) {
                return false;
            }
            $srcIds[$srcId] = true;
            ++$srcCount;
        }

if (1 !== \count($srcIds)) {
            $this->notInlinedIds[$id] = true;

return false;
        }

if ($srcCount > 1 && \is_array($factory = $definition->getFactory()) && ($factory[0] instanceof Reference || $factory[0] instanceof Definition)) {
            return false;
        }

return $this->container->getDefinition($srcId)->isShared();
    }
}

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