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<?php |
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declare(strict_types=1); |
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namespace OniBus\Handler\ClassMethod\Extractor; |
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use OniBus\Handler\ClassMethod\ClassMethod; |
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use OniBus\Handler\ClassMethod\ClassMethodExtractor; |
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use ReflectionAttribute; |
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use ReflectionClass; |
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use ReflectionException; |
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use ReflectionFunctionAbstract; |
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use ReflectionMethod; |
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use OniBus\Attributes\Handler; |
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use ReflectionNamedType; |
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use RuntimeException; |
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use function Sodium\version_string; |
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class ExtractorUsingAttribute implements ClassMethodExtractor |
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{ |
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/** |
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* @var string |
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*/ |
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protected $attribute; |
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/** |
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* @var array |
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*/ |
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protected $handlersFQCN; |
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public function __construct(string $attribute, array $handlersFQCN = []) |
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{ |
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$this->assertAttributesAvailable(); |
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$this->attribute = $attribute; |
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$this->handlersFQCN = $handlersFQCN; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function extractClassMethods(): array |
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{ |
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$mapped = []; |
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foreach ($this->handlersFQCN as $class) { |
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$mapped = array_merge($mapped, $this->getHandlers($class)); |
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} |
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return $mapped; |
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} |
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/** |
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* @param string $class |
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* @return ClassMethod[] |
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* @throws ReflectionException |
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*/ |
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protected function getHandlers(string $class): array |
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{ |
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$handlers = []; |
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if (!class_exists($class)) { |
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return $handlers; |
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} |
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$reflectionClass = new ReflectionClass($class); |
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foreach ($reflectionClass->getMethods() as $method) { |
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$attribute = $this->extractHandlerAttribute($method); |
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if (empty($attribute)) { |
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continue; |
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} |
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$handlers[] = new ClassMethod($this->extractMessage($method, $attribute), $class, $method->getName()); |
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} |
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return $handlers; |
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} |
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protected function extractHandlerAttribute(ReflectionFunctionAbstract $method): ?Handler |
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{ |
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$attribute = $method->getAttributes($this->attribute, ReflectionAttribute::IS_INSTANCEOF)[0] ?? null; |
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if ($attribute instanceof ReflectionAttribute) { |
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$attr = $attribute->newInstance(); |
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assert($attr instanceof Handler); |
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return $attr; |
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} |
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return null; |
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} |
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protected function extractMessage(ReflectionMethod $method, Handler $attribute): string |
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{ |
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if (!empty($attribute->getMessage())) { |
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return $attribute->getMessage(); |
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} |
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$hasParameters = (bool) $method->getNumberOfParameters(); |
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if ($hasParameters) { |
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$paramType = $method->getParameters()[0]->getType(); |
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if ($paramType instanceof ReflectionNamedType && !$paramType->isBuiltin()) { |
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return $paramType->getName(); |
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} |
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} |
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throw new RuntimeException( |
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sprintf( |
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"Invalid Handler Attribute: No 'Message' has been set in %s::%s", |
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$method->getDeclaringClass()->getName(), |
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$method->getName() |
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) |
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); |
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} |
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public function attributesAvailable(): bool |
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{ |
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return PHP_VERSION_ID >= 80000; |
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} |
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public function assertAttributesAvailable():void |
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{ |
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if (!$this->attributesAvailable()) { |
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throw new RuntimeException( |
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sprintf("Attributes are not available. Use PHP version >= 8.0") |
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); |
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} |
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} |
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} |
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brenoroosevelt /
oni-bus
