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📄 CallableResolver.php(3.91 KB)
📁 Exception
📄 Invoker.php(3.31 KB)
📄 InvokerInterface.php(764 B)
📁 ParameterResolver
📁 Reflection

Editing: Invoker.php

<?php

namespace Invoker;

use Invoker\Exception\NotCallableException;
use Invoker\Exception\NotEnoughParametersException;
use Invoker\ParameterResolver\AssociativeArrayResolver;
use Invoker\ParameterResolver\DefaultValueResolver;
use Invoker\ParameterResolver\NumericArrayResolver;
use Invoker\ParameterResolver\ParameterResolver;
use Invoker\ParameterResolver\ResolverChain;
use Invoker\Reflection\CallableReflection;
use Psr\Container\ContainerInterface;

/**
 * Invoke a callable.
 *
 * @author Matthieu Napoli <matthieu@mnapoli.fr>
 */
class Invoker implements InvokerInterface
{
    /**
     * @var CallableResolver|null
     */
    private $callableResolver;

/**
     * @var ParameterResolver
     */
    private $parameterResolver;

/**
     * @var ContainerInterface|null
     */
    private $container;

public function __construct(ParameterResolver $parameterResolver = null, ContainerInterface $container = null)
    {
        $this->parameterResolver = $parameterResolver ?: $this->createParameterResolver();
        $this->container = $container;

if ($container) {
            $this->callableResolver = new CallableResolver($container);
        }
    }

/**
     * {@inheritdoc}
     */
    public function call($callable, array $parameters = array())
    {
        if ($this->callableResolver) {
            $callable = $this->callableResolver->resolve($callable);
        }

if (! is_callable($callable)) {
            throw new NotCallableException(sprintf(
                '%s is not a callable',
                is_object($callable) ? 'Instance of ' . get_class($callable) : var_export($callable, true)
            ));
        }

$callableReflection = CallableReflection::create($callable);

$args = $this->parameterResolver->getParameters($callableReflection, $parameters, array());

// Sort by array key because call_user_func_array ignores numeric keys
        ksort($args);

// Check all parameters are resolved
        $diff = array_diff_key($callableReflection->getParameters(), $args);
        if (! empty($diff)) {
            /** @var \ReflectionParameter $parameter */
            $parameter = reset($diff);
            throw new NotEnoughParametersException(sprintf(
                'Unable to invoke the callable because no value was given for parameter %d ($%s)',
                $parameter->getPosition() + 1,
                $parameter->name
            ));
        }

return call_user_func_array($callable, $args);
    }

/**
     * Create the default parameter resolver.
     *
     * @return ParameterResolver
     */
    private function createParameterResolver()
    {
        return new ResolverChain(array(
            new NumericArrayResolver,
            new AssociativeArrayResolver,
            new DefaultValueResolver,
        ));
    }

/**
     * @return ParameterResolver By default it's a ResolverChain
     */
    public function getParameterResolver()
    {
        return $this->parameterResolver;
    }

/**
     * @return ContainerInterface|null
     */
    public function getContainer()
    {
        return $this->container;
    }

/**
     * @return CallableResolver|null Returns null if no container was given in the constructor.
     */
    public function getCallableResolver()
    {
        return $this->callableResolver;
    }
}

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