File form-bundle/src/Form/DataTransformer/BooleanOrNullTransformer.php

1:	<?php
2:	namespace TIC\FormBundle\Form\DataTransformer;
3:
4:	use Symfony\Component\Form\DataTransformerInterface;
5:	use Symfony\Component\Form\Exception\TransformationFailedException;
6:
7:	/**
8:	* Conversion pour valeur booléenne à 3 niveau (vrai/faux/null).
9:	*/
10:	class BooleanOrNullTransformer implements DataTransformerInterface
11:	{
12:
13:	private $values = array(
14:	'null' => '',
15:	'false' => '0',
16:	'true' => '1',
17:	);
18:
19:	private $nullable;
20:
21:	public function __construct($notnull = null)
22:	{
23:	$this->nullable = empty($notnull);
24:	}
25:
26:
27:	/**
28:	* Transforms from DB value to form value.
29:	* @param mixed $value
30:	* @return String
31:	*/
32:	public function transform($value)
33:	{
34:	if ($this->nullable && $value === null) return $this->values['null'];
35:	return empty($value) ? $this->values['false'] : $this->values['true'];
36:	}
37:
38:
39:	/**
40:	* Reverse transforms form value to db value.
41:	* @param mixed $value
42:	* @return Boolean\|Null
43:	*/
44:	public function reverseTransform($value)
45:	{
46:	if ($value === null \|\| $value === $this->values['null'])
47:	return $this->nullable ? null : false;
48:
49:	if ($value === $this->values['false']) return false;
50:	if ($value === $this->values['true']) return true;
51:
52:	return empty($value) ? false : true;
53:	}
54:
55:
56:	}
57: