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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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/** |
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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 void|bool Return false if transformation should be stopped |
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*/ |
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public function transform(StreamMetaData $metadata) |
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{ |
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// Make the job only when we use cache directory |
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if (!self::$rewriteToPath) { |
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return; |
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} |
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$hasReflectionFilename = strpos($metadata->source, 'getFileName') !== false; |
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$hasMagicConstants = (strpos($metadata->source, '__DIR__') !== false) || |
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(strpos($metadata->source, '__FILE__') !== false); |
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if (!$hasMagicConstants && !$hasReflectionFilename) { |
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return; |
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} |
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// Resolve magic constants |
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if ($hasMagicConstants) { |
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$this->replaceMagicConstants($metadata); |
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} |
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if ($hasReflectionFilename) { |
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// need to make more reliable solution |
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$metadata->source = preg_replace( |
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'/\$([\w\$\-\>\:\(\)]*?getFileName\(\))/S', |
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'\\' . __CLASS__ . '::resolveFileName(\$\1)', |
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1 |
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$metadata->source |
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); |
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} |
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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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array(self::$rewriteToPath, DIRECTORY_SEPARATOR . '_proxies'), |
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array(self::$rootPath, ''), |
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$fileName |
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); |
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} |
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/** |
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* Replace only magic constants in the code |
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* |
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* @param StreamMetaData $metadata |
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*/ |
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private function replaceMagicConstants(StreamMetaData $metadata) |
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{ |
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$originalUri = $metadata->uri; |
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$replacement = array( |
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T_FILE => $originalUri, |
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T_DIR => dirname($originalUri) |
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); |
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$tokenStream = token_get_all($metadata->source); |
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$transformedSource = ''; |
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foreach ($tokenStream as $token) { |
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list ($token, $value) = (array) $token + array(1 => $token); |
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if (isset($replacement[$token])) { |
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$value = "'" . $replacement[$token] . "'"; |
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} |
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$transformedSource .= $value; |
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} |
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$metadata->source = $transformedSource; |
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} |
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} |
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goaop /
framework
