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<?php |
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/** |
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* Copyright MediaCT. All rights reserved. |
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* https://www.mediact.nl |
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*/ |
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namespace Mediact\DependencyGuard\Php; |
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use Mediact\DependencyGuard\Iterator\FileIteratorInterface; |
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use Mediact\DependencyGuard\Php\Filter\SymbolFilterInterface; |
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use PhpParser\Error; |
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use PhpParser\NodeTraverser; |
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use PhpParser\Parser; |
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use PhpParser\ParserFactory; |
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class SymbolExtractor implements SymbolExtractorInterface |
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{ |
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/** @var Parser */ |
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private $parser; |
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/** |
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* Constructor. |
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* |
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* @param Parser|null $parser |
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*/ |
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public function __construct(Parser $parser = null) |
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{ |
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if ($parser === null) { |
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$factory = new ParserFactory(); |
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$parser = $factory->create(ParserFactory::PREFER_PHP7); |
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} |
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$this->parser = $parser; |
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} |
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/** |
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* Extract the PHP symbols from the given files. |
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* |
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* @param FileIteratorInterface $files |
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* @param SymbolFilterInterface $filter |
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* |
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* @return SymbolIteratorInterface |
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*/ |
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public function extract( |
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FileIteratorInterface $files, |
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SymbolFilterInterface $filter |
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): SymbolIteratorInterface { |
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$symbols = []; |
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foreach ($files as $file) { |
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try { |
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$contents = $this->readFile($file); |
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if ($contents === null) { |
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continue; |
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} |
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$statements = $this->parser->parse($contents); |
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} catch (Error $e) { |
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// Either not a PHP file or the broken file should be detected by other |
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// tooling entirely. |
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continue; |
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} |
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$tracker = new SymbolTracker($filter); |
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$traverser = new NodeTraverser(); |
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$traverser->addVisitor($tracker); |
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$traverser->traverse($statements); |
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foreach ($tracker->getSymbols() as $node) { |
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$symbols[] = new Symbol($file, $node); |
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} |
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} |
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return new SymbolIterator(...$symbols); |
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} |
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/** |
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* @param \SplFileInfo $file |
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* |
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* @return null|string |
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*/ |
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private function readFile(\SplFileInfo $file): ?string |
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{ |
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$oldErrorReporting = error_reporting(); |
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error_reporting($oldErrorReporting & ~E_WARNING); |
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try { |
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$contents = \file_get_contents($file); |
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if ($contents === false) { |
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return null; |
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} |
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return $contents; |
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} finally { |
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error_reporting($oldErrorReporting); |
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} |
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} |
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} |
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mediact /
dependency-guard
