79 lines
1.9 KiB
PHP
79 lines
1.9 KiB
PHP
<?php
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/*
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* This file is part of the Silex framework.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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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 Silex;
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use Pimple\Container;
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class CallbackResolver
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{
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const SERVICE_PATTERN = "/[A-Za-z0-9\._\-]+:[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*/";
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private $app;
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public function __construct(Container $app)
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{
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$this->app = $app;
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}
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/**
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* Returns true if the string is a valid service method representation.
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*
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* @param string $name
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*
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* @return bool
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*/
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public function isValid($name)
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{
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return is_string($name) && (preg_match(static::SERVICE_PATTERN, $name) || isset($this->app[$name]));
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}
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/**
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* Returns a callable given its string representation.
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*
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* @param string $name
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*
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* @return callable
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*
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* @throws \InvalidArgumentException In case the method does not exist.
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*/
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public function convertCallback($name)
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{
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if (preg_match(static::SERVICE_PATTERN, $name)) {
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list($service, $method) = explode(':', $name, 2);
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$callback = array($this->app[$service], $method);
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} else {
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$service = $name;
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$callback = $this->app[$name];
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}
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if (!is_callable($callback)) {
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throw new \InvalidArgumentException(sprintf('Service "%s" is not callable.', $service));
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}
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return $callback;
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}
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/**
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* Returns a callable given its string representation if it is a valid service method.
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*
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* @param string $name
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*
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* @return string|callable A callable value or the string passed in
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*
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* @throws \InvalidArgumentException In case the method does not exist.
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*/
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public function resolveCallback($name)
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{
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return $this->isValid($name) ? $this->convertCallback($name) : $name;
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}
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}
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