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<?php |
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/****************************************************************************** |
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* Copyright (c) 2016 Constantin Galbenu <[email protected]> * |
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******************************************************************************/ |
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namespace Gica\CodeAnalysis; |
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use Gica\CodeAnalysis\MethodListenerDiscovery\ClassSorter; |
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use Gica\CodeAnalysis\MethodListenerDiscovery\ListenerClassValidator; |
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use Gica\CodeAnalysis\MethodListenerDiscovery\ListenerMethod; |
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use Gica\CodeAnalysis\MethodListenerDiscovery\MessageClassDetector; |
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use Gica\CodeAnalysis\Traits\FilesInDirectoryExtracter; |
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class MethodListenerDiscovery |
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{ |
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use FilesInDirectoryExtracter; |
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protected $eventToListenerMap = []; |
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/** |
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* @var MessageClassDetector |
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*/ |
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private $messageClassDetector; |
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/** @var ListenerClassValidator */ |
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private $classValidator; |
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/** @var ListenerMethod[] */ |
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private $allEventsListeners = []; |
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/** |
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* @var ClassSorter |
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*/ |
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private $classSorter; |
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/** |
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* @var PhpClassInFileInspector |
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*/ |
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private $phpClassInFileInspector; |
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public function __construct( |
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MessageClassDetector $messageClassDetector, |
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ListenerClassValidator $classValidator, |
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ClassSorter $classSorter, |
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PhpClassInFileInspector $phpClassInFileInspector = null |
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) |
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{ |
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$this->messageClassDetector = $messageClassDetector; |
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$this->classValidator = $classValidator; |
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$this->classSorter = $classSorter; |
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$this->phpClassInFileInspector = $phpClassInFileInspector ?? new PhpClassInFileInspector(); |
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} |
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public function discover($directory) |
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{ |
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$files = $this->getFilesInDirectory($directory); |
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$files = $this->filterFiles($files); |
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foreach ($files as $file) { |
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$fullFilePath = $file; |
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$listenerEntries = $this->extractListenerMethodsFromFile($fullFilePath); |
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if ($listenerEntries) { |
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foreach ($listenerEntries as $entry) { |
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$this->addListenerToEvents($entry); |
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} |
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} |
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} |
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$this->allEventsListeners = $this->sortListeners($this->allEventsListeners); |
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foreach ($this->eventToListenerMap as $eventClass => $listeners) { |
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$this->eventToListenerMap[$eventClass] = $this->sortListeners($listeners); |
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} |
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} |
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/** |
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* @param string $filePath |
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* @return bool |
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*/ |
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protected function isListenerFileName($filePath) |
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{ |
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return preg_match('#\.php$#ims', $filePath); |
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} |
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/** |
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* @param $fullFilePath |
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* @return bool|\Gica\CodeAnalysis\MethodListenerDiscovery\ListenerMethod[] |
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*/ |
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protected function extractListenerMethodsFromFile($fullFilePath) |
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{ |
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$fqn = $this->phpClassInFileInspector->getFullyQualifiedClassName($fullFilePath); |
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if (null === $fqn) { |
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return false; |
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} |
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return $this->findListenerMethodsInClass($fqn); |
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} |
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protected function addListenerToEvents(ListenerMethod $listener) |
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{ |
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$this->eventToListenerMap[$listener->getEventClassName()][] = $listener; |
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$this->allEventsListeners[] = $listener; |
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} |
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/** |
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* @param ListenerMethod[] $listeners |
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* @return ListenerMethod[] |
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*/ |
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private function sortListeners($listeners) |
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{ |
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usort($listeners, function (ListenerMethod $a, ListenerMethod $b) { |
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return $this->classSorter->__invoke($a->getClass(), $b->getClass()); |
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}); |
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return $listeners; |
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} |
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public function getEventToListenerMap() |
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{ |
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return $this->eventToListenerMap; |
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} |
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/** |
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* @return ListenerMethod[] |
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*/ |
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public function getAllEventsListeners(): array |
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{ |
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return $this->allEventsListeners; |
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} |
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protected function filterFiles(array $files) |
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{ |
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return array_filter($files, function ($file) { |
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return $this->isListenerFileName($file); |
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}); |
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} |
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/** |
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* @param $className |
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* @return ListenerMethod[] |
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*/ |
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private function findListenerMethodsInClass($className) |
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{ |
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$result = []; |
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$reflectionClass = new \ReflectionClass($className); |
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if (!$this->classValidator->isClassAccepted($reflectionClass)) { |
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return []; |
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} |
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foreach ($reflectionClass->getMethods() as $reflectionMethod) { |
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if (!$this->isValidListenerMethod($reflectionMethod)) { |
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continue; |
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} |
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$eventClass = $this->getMessageClassFromMethod($reflectionMethod); |
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if ($eventClass) { |
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$result[] = new ListenerMethod($reflectionClass, $reflectionMethod->name, $eventClass); |
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} |
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} |
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return $result; |
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} |
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private function getMessageClassFromMethod(\ReflectionMethod $reflectionMethod) |
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{ |
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if (!$this->isMethodAcccepted($reflectionMethod)) { |
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return false; |
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} |
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foreach ($reflectionMethod->getParameters() as $reflectionParameter) { |
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$typeHintedClass = $reflectionParameter->getClass(); |
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if ($typeHintedClass) { |
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if ($this->isOurMessageClass($typeHintedClass)) { |
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return $typeHintedClass->name; |
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} |
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} |
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} |
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return false; |
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} |
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private function isValidListenerMethod(\ReflectionMethod $reflectionMethod) |
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{ |
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if ($reflectionMethod->getNumberOfParameters() == 0) |
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return false; |
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return true; |
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} |
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private function isOurMessageClass(\ReflectionClass $typeHintedClass) |
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{ |
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return $this->messageClassDetector->isMessageClass($typeHintedClass); |
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} |
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private function isMethodAcccepted(\ReflectionMethod $reflectionMethod) |
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{ |
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return $this->messageClassDetector->isMethodAccepted($reflectionMethod); |
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} |
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} |