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<?php |
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/* |
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* Go! AOP framework |
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* |
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* @copyright Copyright 2012, Lisachenko Alexander <[email protected]> |
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* |
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* This source file is subject to the license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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namespace Go\Instrument\Transformer; |
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use Go\Core\AspectKernel; |
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use PhpParser\Node\Expr\MethodCall; |
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use PhpParser\Node\Scalar\MagicConst; |
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use PhpParser\Node\Scalar\MagicConst\Dir; |
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use PhpParser\Node\Scalar\MagicConst\File; |
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use PhpParser\NodeTraverser; |
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/** |
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* Transformer that replaces magic __DIR__ and __FILE__ constants in the source code |
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* |
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* Additionally, ReflectionClass->getFileName() is also wrapped into normalizer method call |
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*/ |
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class MagicConstantTransformer extends BaseSourceTransformer |
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{ |
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/** |
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* Root path of application |
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* |
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* @var string |
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*/ |
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protected static $rootPath = ''; |
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/** |
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* Path to rewrite to (cache directory) |
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* |
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* @var string |
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*/ |
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protected static $rewriteToPath = ''; |
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/** |
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* Class constructor |
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* |
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* @param AspectKernel $kernel Instance of kernel |
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*/ |
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public function __construct(AspectKernel $kernel) |
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{ |
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parent::__construct($kernel); |
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self::$rootPath = $this->options['appDir']; |
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self::$rewriteToPath = $this->options['cacheDir']; |
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} |
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/** |
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* This method may transform the supplied source and return a new replacement for it |
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* |
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* @param StreamMetaData $metadata Metadata for source |
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* @return string See RESULT_XXX constants in the interface |
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*/ |
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public function transform(StreamMetaData $metadata) |
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{ |
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$this->replaceMagicDirFileConstants($metadata); |
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$this->wrapReflectionGetFileName($metadata); |
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// We should always vote abstain, because if there is only changes for magic constants, we can drop them |
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return self::RESULT_ABSTAIN; |
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} |
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/** |
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* Resolves file name from the cache directory to the real application root dir |
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* |
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* @param string $fileName Absolute file name |
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* |
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* @return string Resolved file name |
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*/ |
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public static function resolveFileName($fileName) |
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{ |
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return str_replace( |
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[self::$rewriteToPath, DIRECTORY_SEPARATOR . '_proxies'], |
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[self::$rootPath, ''], |
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$fileName |
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); |
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} |
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/** |
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* Wraps all possible getFileName() methods from ReflectionFile |
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* |
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* @param StreamMetaData $metadata |
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*/ |
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private function wrapReflectionGetFileName(StreamMetaData $metadata) |
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{ |
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$methodCallFinder = new NodeFinderVisitor([MethodCall::class]); |
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$traverser = new NodeTraverser(); |
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$traverser->addVisitor($methodCallFinder); |
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$traverser->traverse($metadata->syntaxTree); |
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/** @var MethodCall[] $methodCalls */ |
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$methodCalls = $methodCallFinder->getFoundNodes(); |
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foreach ($methodCalls as $methodCallNode) { |
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if ($methodCallNode->name !== 'getFileName') { |
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continue; |
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} |
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$startPosition = $methodCallNode->getAttribute('startTokenPos'); |
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$endPosition = $methodCallNode->getAttribute('endTokenPos'); |
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$expressionPrefix = '\\' . __CLASS__ . '::resolveFileName('; |
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$metadata->tokenStream[$startPosition][1] = $expressionPrefix . $metadata->tokenStream[$startPosition][1]; |
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$metadata->tokenStream[$endPosition][1] .= ')'; |
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} |
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} |
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/** |
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* Replaces all magic __DIR__ and __FILE__ constants in the file with calculated value |
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* |
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* @param StreamMetaData $metadata |
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*/ |
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private function replaceMagicDirFileConstants(StreamMetaData $metadata) |
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{ |
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$magicConstFinder = new NodeFinderVisitor([Dir::class, File::class]); |
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$traverser = new NodeTraverser(); |
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$traverser->addVisitor($magicConstFinder); |
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$traverser->traverse($metadata->syntaxTree); |
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/** @var MagicConst[] $magicConstants */ |
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$magicConstants = $magicConstFinder->getFoundNodes(); |
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$magicFileValue = $metadata->uri; |
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$magicDirValue = dirname($magicFileValue); |
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foreach ($magicConstants as $magicConstantNode) { |
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$tokenPosition = $magicConstantNode->getAttribute('startTokenPos'); |
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$replacement = $magicConstantNode instanceof Dir ? $magicDirValue : $magicFileValue; |
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$metadata->tokenStream[$tokenPosition][1] = "'{$replacement}'"; |
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} |
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} |
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} |
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goaop /
framework
