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<?php |
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declare(strict_types=1); |
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namespace Lit\Air\Injection; |
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use Lit\Air\Configurator as C; |
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use Lit\Air\Factory; |
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use ReflectionMethod; |
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/** |
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* SetterInjector inject dependencies into an object by it's setter method. |
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* By default only method with name injectXXX and with single parameter will be considered. |
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*/ |
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class SetterInjector implements InjectorInterface |
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{ |
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protected $prefixes = ['inject']; |
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/** |
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* SetterInjector constructor. |
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* |
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* @param array|string[] $prefixes Method prefix(es) to scan. |
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*/ |
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public function __construct(array $prefixes = ['inject']) |
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{ |
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$this->prefixes = $prefixes; |
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} |
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public function inject(Factory $factory, $obj, array $extra = []): void |
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{ |
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if (!$this->isTarget($obj)) { |
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return; |
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} |
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$class = new \ReflectionClass($obj); |
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foreach ($class->getMethods(ReflectionMethod::IS_PUBLIC) as $method) { |
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if (!$this->shouldBeInjected($method)) { |
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continue; |
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} |
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$parameter = $method->getParameters()[0]; |
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$paramClassName = null; |
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$keys = [$parameter->name]; |
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$paramClass = $parameter->getClass(); |
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if (!empty($paramClass)) { |
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$keys[] = $paramClassName = $paramClass->name; |
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} |
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$value = $factory->resolveDependency($class->name, $keys, $paramClassName, $extra); |
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$method->invoke($obj, $value); |
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} |
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} |
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protected function isTarget($obj): bool |
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{ |
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$class = get_class($obj); |
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return defined("$class::SETTER_INJECTOR") && $class::SETTER_INJECTOR === static::class; |
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} |
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public function setPrefixes(array $prefixes): self |
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{ |
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$this->prefixes = $prefixes; |
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return $this; |
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} |
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protected function shouldBeInjected(ReflectionMethod $method) |
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{ |
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if ($method->isStatic() || $method->isAbstract()) { |
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return false; |
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} |
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$parameter = $method->getParameters(); |
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if ( |
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count($parameter) !== 1 || $parameter[0]->isOptional() |
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) { |
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return false; |
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} |
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foreach ($this->prefixes as $prefix) { |
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if (substr($method->name, 0, strlen($prefix)) === $prefix) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Configuration method of setter injector. |
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* |
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* @return array |
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*/ |
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public static function configuration() |
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{ |
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return [ |
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Factory::INJECTOR => C::value(new SetterInjector()), |
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]; |
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} |
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} |
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litphp /
air
