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: /**
15:  * Chain of filters and validators for a single variable.
16:  * The validation itself is performed after fulfilling the condition.
17:  * The condition is checked by a defined validator.
18:  *
19:  * @category Jyxo
20:  * @package Jyxo_Input
21:  * @subpackage Chain
22:  * @copyright Copyright (c) 2005-2011 Jyxo, s.r.o.
23:  * @license https://github.com/jyxo/php/blob/master/license.txt
24:  * @author Roman Řáha
25:  */
26: class Jyxo_Input_Chain_Conditional extends Jyxo_Input_Chain
27: {
28:     /**
29:      * Condition validator.
30:      *
31:      * @var Jyxo_Input_ValidatorInterface
32:      */
33:     private $condValidator = null;
34: 
35:     /**
36:      * Sets the condition validator.
37:      *
38:      * @param Jyxo_Input_ValidatorInterface $validator
39:      */
40:     public function __construct(Jyxo_Input_ValidatorInterface $validator = null)
41:     {
42:         if (null !== $validator) {
43:             $this->setCondValidator($validator);
44:         }
45:     }
46: 
47:     /**
48:      * Validates a value.
49:      *
50:      * @param mixed $value Input value
51:      * @return boolean
52:      */
53:     public function isValid($value)
54:     {
55:         // Validation is performed only if the condition is fulfilled
56:         if (true === $this->checkCondition($value)) {
57:             return parent::isValid($value);
58:         }
59:         // No validation -> the value is valid
60:         $this->value = $value;
61:         return true;
62:     }
63: 
64:     /**
65:      * Checks if the condition is fulfilled.
66:      *
67:      * @param mixed $value Input value
68:      * @return boolean
69:      */
70:     private function checkCondition($value)
71:     {
72:         if (null === $this->condValidator) {
73:             // There is no validator -> always fulfilled
74:             return true;
75:         }
76:         return $this->condValidator->isValid($value);
77:     }
78: 
79:     /**
80:      * Sets the condition validator.
81:      *
82:      * @param Jyxo_Input_ValidatorInterface $validator Condition validator
83:      * @return Jyxo_Input_Chain_Conditional
84:      */
85:     public function setCondValidator(Jyxo_Input_ValidatorInterface $validator)
86:     {
87:         $this->condValidator = $validator;
88:         return $this;
89:     }
90: }
91: