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

1:	<?php
2:	namespace TIC\CoreBundle\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:	protected $values = array(
13:	'null' => '',
14:	'false' => '0',
15:	'true' => '1',
16:	);
17:
18:	private $nullable;
19:
20:	/**
21:	* Construct the data transformer with parameters.
22:	*
23:	* @param bool $notnull Disable the 'null' option ('null' as 'false')
24:	*/
25:	public function __construct(bool $notnull = null)
26:	{
27:	$this->nullable = empty($notnull);
28:	}
29:
30:	/**
31:	* Transforms from DB value to form value.
32:	*
33:	* @param mixed $value
34:	* @return string Label for true, false or null
35:	*/
36:	public function transform(mixed $value): string
37:	{
38:	if ($this->nullable && $value === null) return $this->values['null'];
39:	return empty($value) ? $this->values['false'] : $this->values['true'];
40:	}
41:
42:	/**
43:	* Reverse transforms form value to db value.
44:	*
45:	* @param mixed $value
46:	* @return bool\|null
47:	*/
48:	public function reverseTransform(mixed $value): ?bool
49:	{
50:	if ($value === null \|\| $value === $this->values['null'])
51:	return $this->nullable ? null : false;
52:
53:	if ($value === $this->values['false']) return false;
54:	if ($value === $this->values['true']) return true;
55:
56:	return empty($value) ? false : true;
57:	}
58:
59:	}
60: