1: <?php
 2: 
 3: /**
 4:  * Jyxo PHP Library
 5:  *
 6:  * LICENSE
 7:  *
 8:  * This source file is subject to the new BSD license that is bundled
 9:  * with this package in the file license.txt.
10:  * It is also available through the world-wide-web at this URL:
11:  * https://github.com/jyxo/php/blob/master/license.txt
12:  */
13: 
14: namespace Jyxo\Input\Chain;
15: 
16: /**
17:  * Chain of filters and validators for a single variable.
18:  * The validation itself is performed after fulfilling the condition.
19:  * The condition is checked by a defined validator.
20:  *
21:  * @category Jyxo
22:  * @package Jyxo\Input
23:  * @subpackage Chain
24:  * @copyright Copyright (c) 2005-2011 Jyxo, s.r.o.
25:  * @license https://github.com/jyxo/php/blob/master/license.txt
26:  * @author Roman Řáha
27:  */
28: class Conditional extends \Jyxo\Input\Chain
29: {
30:     /**
31:      * Condition validator.
32:      *
33:      * @var \Jyxo\Input\ValidatorInterface
34:      */
35:     private $condValidator = null;
36: 
37:     /**
38:      * Sets the condition validator.
39:      *
40:      * @param \Jyxo\Input\ValidatorInterface $validator
41:      */
42:     public function __construct(\Jyxo\Input\ValidatorInterface $validator = null)
43:     {
44:         if (null !== $validator) {
45:             $this->setCondValidator($validator);
46:         }
47:     }
48: 
49:     /**
50:      * Validates a value.
51:      *
52:      * @param mixed $value Input value
53:      * @return boolean
54:      */
55:     public function isValid($value)
56:     {
57:         // Validation is performed only if the condition is fulfilled
58:         if (true === $this->checkCondition($value)) {
59:             return parent::isValid($value);
60:         }
61:         // No validation -> the value is valid
62:         $this->value = $value;
63:         return true;
64:     }
65: 
66:     /**
67:      * Checks if the condition is fulfilled.
68:      *
69:      * @param mixed $value Input value
70:      * @return boolean
71:      */
72:     private function checkCondition($value)
73:     {
74:         if (null === $this->condValidator) {
75:             // There is no validator -> always fulfilled
76:             return true;
77:         }
78:         return $this->condValidator->isValid($value);
79:     }
80: 
81:     /**
82:      * Sets the condition validator.
83:      *
84:      * @param \Jyxo\Input\ValidatorInterface $validator Condition validator
85:      * @return \Jyxo\Input\Chain\Conditional
86:      */
87:     public function setCondValidator(\Jyxo\Input\ValidatorInterface $validator)
88:     {
89:         $this->condValidator = $validator;
90:         return $this;
91:     }
92: }
93: