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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of PHP Invoker. |
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* |
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* PHP version 7.1 and above required |
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* |
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* @author Divine Niiquaye Ibok <[email protected]> |
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* @copyright 2019 Biurad Group (https://biurad.com/) |
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* @license https://opensource.org/licenses/BSD-3-Clause License |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace DivineNii\Invoker; |
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use DivineNii\Invoker\Exceptions\NotCallableException; |
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use Psr\Container\ContainerInterface; |
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use Psr\Container\NotFoundExceptionInterface; |
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use ReflectionMethod; |
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use Throwable; |
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/** |
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* Resolves a callable from a container. |
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* |
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* @author Matthieu Napoli <[email protected]> |
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* @author Divine Niiquaye Ibok <[email protected]> |
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*/ |
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class CallableResolver |
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{ |
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public const CALLABLE_PATTERN = '#^([^\:]+)(\:|\@)([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)$#'; |
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/** |
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* @var null|ContainerInterface |
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*/ |
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private $container; |
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public function __construct(?ContainerInterface $container = null) |
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{ |
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$this->container = $container; |
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} |
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/** |
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* Resolve the given callable into a real PHP callable. |
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* |
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* @param array<mixed,string>|callable|object|string $callable |
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* |
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* @throws NotCallableException |
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* |
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* @return callable real PHP callable |
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*/ |
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public function resolve($callable) |
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{ |
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$isStaticCallToNonStaticMethod = false; |
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// If it's already a callable there is nothing to do |
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if (\is_callable($callable)) { |
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$isStaticCallToNonStaticMethod = $this->isStaticCallToNonStaticMethod($callable); |
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if (!$isStaticCallToNonStaticMethod) { |
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return $callable; |
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} |
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} elseif (\is_string($callable) && 1 === \preg_match(self::CALLABLE_PATTERN, $callable, $matches)) { |
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// check for callable as "class:method", and "class@method" |
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$callable = [$matches[1], $matches[3]]; |
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} |
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// The callable is a container entry name |
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if (\is_string($callable) && null !== $this->container) { |
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try { |
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$callable = $this->container->get($callable); |
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} catch (NotFoundExceptionInterface $e) { |
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throw NotCallableException::fromInvalidCallable($callable, true, $e); |
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} |
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} |
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return $this->resolveCallable($callable, $isStaticCallToNonStaticMethod); |
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} |
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/** |
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* @param array<mixed,string>|callable|object|string $callable |
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* @param bool $isStaticCallToNonStaticMethod |
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* |
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* @throws NotCallableException |
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* |
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* @return callable |
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*/ |
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private function resolveCallable($callable, bool $isStaticCallToNonStaticMethod) |
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{ |
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// Callable object or string (i.e. implementing __invoke()) |
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if ((\is_string($callable) || \is_object($callable)) && \method_exists($callable, '__invoke')) { |
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$callable = [$callable, '__invoke']; |
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} |
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// The callable is an array whose first item is a container entry name |
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// e.g. ['some-container-entry', 'methodToCall'] |
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if (\is_array($callable) && \is_string($callable[0])) { |
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list($class, $method) = $callable; |
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try { |
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if (null !== $this->container) { |
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// Replace the container entry name by the actual object |
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$class = $this->container->get($class); |
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} elseif (\class_exists($class)) { |
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$class = new $class(); |
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} |
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$callable = [$class, $method]; |
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} catch (Throwable $e) { |
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if ($isStaticCallToNonStaticMethod) { |
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throw new NotCallableException(\sprintf( |
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'Cannot call %s::%s() because %2$s() is not a static method and "%1$s" is not a valid', |
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$class, |
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$method |
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), 0, $e); |
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} |
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throw NotCallableException::fromInvalidCallable($callable, null !== $this->container, $e); |
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} |
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} |
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if (!\is_callable($callable)) { |
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throw NotCallableException::fromInvalidCallable($callable, null !== $this->container); |
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} |
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// Unrecognized stuff, we let it fail later |
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return $callable; |
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} |
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/** |
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* Check if the callable represents a static call to a non-static method. |
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* |
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* @param mixed $callable |
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* |
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* @return bool |
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*/ |
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private function isStaticCallToNonStaticMethod($callable) |
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{ |
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if (\is_array($callable) && \is_string($callable[0])) { |
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list($class, $method) = $callable; |
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$reflection = new ReflectionMethod($class, $method); |
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return !$reflection->isStatic(); |
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} |
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return false; |
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} |
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} |
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divineniiquaye /
php-invoker
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