77 lines
1.8 KiB
PHP
77 lines
1.8 KiB
PHP
<?php
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/*
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* This file is part of the Symfony CMF package.
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*
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* (c) 2011-2014 Symfony CMF
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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 Symfony\Cmf\Component\Routing\Enhancer;
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use Symfony\Component\HttpFoundation\Request;
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/**
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* This enhancer sets a field to a fixed value. You can specify a source field
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* name to only set the target field if the source is present.
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*
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* @author David Buchmann
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*/
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class FieldPresenceEnhancer implements RouteEnhancerInterface
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{
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/**
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* Field name for the source field that must exist. If null, the target
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* field is always set if not already present.
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*
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* @var string|null
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*/
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protected $source;
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/**
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* Field name to write the value into.
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*
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* @var string
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*/
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protected $target;
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/**
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* Value to set the target field to.
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*
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* @var string
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*/
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private $value;
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/**
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* @param null|string $source the field name of the class, null to disable the check
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* @param string $target the field name to set from the map
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* @param string $value value to set target field to if source field exists
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*/
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public function __construct($source, $target, $value)
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{
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$this->source = $source;
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$this->target = $target;
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$this->value = $value;
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}
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/**
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* {@inheritDoc}
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*/
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public function enhance(array $defaults, Request $request)
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{
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if (isset($defaults[$this->target])) {
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// no need to do anything
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return $defaults;
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}
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if (null !== $this->source && !isset($defaults[$this->source])) {
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return $defaults;
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}
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$defaults[$this->target] = $this->value;
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return $defaults;
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}
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}
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