Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony CMF package.
Chris@0:  *
Chris@0:  * (c) 2011-2015 Symfony CMF
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Cmf\Component\Routing\Enhancer;
Chris@0: 
Chris@0: use Symfony\Component\HttpFoundation\Request;
Chris@0: 
Chris@0: /**
Chris@0:  * This enhancer can fill one field with the result of a hashmap lookup of
Chris@0:  * another field. If the target field is already set, it does nothing.
Chris@0:  *
Chris@0:  * @author David Buchmann
Chris@0:  */
Chris@0: class FieldMapEnhancer implements RouteEnhancerInterface
Chris@0: {
Chris@0:     /**
Chris@0:      * @var string field for key in hashmap lookup
Chris@0:      */
Chris@0:     protected $source;
Chris@0:     /**
Chris@0:      * @var string field to write hashmap lookup result into
Chris@0:      */
Chris@0:     protected $target;
Chris@0:     /**
Chris@0:      * @var array containing the mapping between the source field value and target field value
Chris@0:      */
Chris@0:     protected $hashmap;
Chris@0: 
Chris@0:     /**
Chris@0:      * @param string $source  the field to read
Chris@0:      * @param string $target  the field to write the result of the lookup into
Chris@0:      * @param array  $hashmap for looking up value from source and get value for target
Chris@0:      */
Chris@0:     public function __construct($source, $target, array $hashmap)
Chris@0:     {
Chris@0:         $this->source = $source;
Chris@0:         $this->target = $target;
Chris@0:         $this->hashmap = $hashmap;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * If the target field is not set but the source field is, map the field.
Chris@0:      *
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function enhance(array $defaults, Request $request)
Chris@0:     {
Chris@0:         if (isset($defaults[$this->target])) {
Chris@0:             return $defaults;
Chris@0:         }
Chris@0:         if (!isset($defaults[$this->source])) {
Chris@0:             return $defaults;
Chris@0:         }
Chris@0:         if (!isset($this->hashmap[$defaults[$this->source]])) {
Chris@0:             return $defaults;
Chris@0:         }
Chris@0: 
Chris@0:         $defaults[$this->target] = $this->hashmap[$defaults[$this->source]];
Chris@0: 
Chris@0:         return $defaults;
Chris@0:     }
Chris@0: }