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File: CallableResolverAwareTrait.php

<?php
/**
 * Slim Framework (https://slimframework.com)
 *
 * @license https://github.com/slimphp/Slim/blob/3.x/LICENSE.md (MIT License)
 */

namespace Slim;

use Closure;
use Psr\Container\ContainerInterface;
use RuntimeException;
use Slim\Interfaces\CallableResolverInterface;

/**
 * This is an internal class that enables resolution of 'class:method' strings
 * into a closure. This class is an implementation detail and is used only inside
 * of the Slim application.
 */
trait CallableResolverAwareTrait
{
    /**
     * Resolve a string of the format 'class:method' into a closure that the
     * router can dispatch.
     *
     * @param callable|string $callable
     *
     * @return Closure
     *
     * @throws RuntimeException If the string cannot be resolved as a callable
     */
    protected function resolveCallable($callable)
    {
        if (!$this->container instanceof ContainerInterface) {
            return $callable;
        }

        /** @var CallableResolverInterface $resolver */
        $resolver = $this->container->get('callableResolver');

        return $resolver->resolve($callable);
    }
}