-
-
Notifications
You must be signed in to change notification settings - Fork 9.4k
/
CallbackChoiceLoader.php
77 lines (65 loc) · 1.68 KB
/
CallbackChoiceLoader.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Form\ChoiceList\Loader;
use Symfony\Component\Form\ChoiceList\ArrayChoiceList;
/**
* Loads an {@link ArrayChoiceList} instance from a callable returning an array of choices.
*
* @author Jules Pietri <jules@heahprod.com>
*/
class CallbackChoiceLoader implements ChoiceLoaderInterface
{
private $callback;
/**
* The loaded choice list.
*
* @var ArrayChoiceList
*/
private $choiceList;
/**
* @param callable $callback The callable returning an array of choices
*/
public function __construct(callable $callback)
{
$this->callback = $callback;
}
/**
* {@inheritdoc}
*/
public function loadChoiceList($value = null)
{
if (null !== $this->choiceList) {
return $this->choiceList;
}
return $this->choiceList = new ArrayChoiceList(($this->callback)(), $value);
}
/**
* {@inheritdoc}
*/
public function loadChoicesForValues(array $values, $value = null)
{
// Optimize
if (empty($values)) {
return [];
}
return $this->loadChoiceList($value)->getChoicesForValues($values);
}
/**
* {@inheritdoc}
*/
public function loadValuesForChoices(array $choices, $value = null)
{
// Optimize
if (empty($choices)) {
return [];
}
return $this->loadChoiceList($value)->getValuesForChoices($choices);
}
}