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

1:	<?php
2:	namespace TIC\FormBundle\Form\DataTransformer;
3:
4:	use Symfony\Component\Form\Extension\Core\DataTransformer\BaseDateTimeTransformer;
5:	use Symfony\Component\Form\Exception\TransformationFailedException;
6:
7:	/**
8:	* Transforms between a time string and a DateTime object.
9:	*/
10:	class StringToTimeTransformer extends BaseDateTimeTransformer
11:	{
12:	/**
13:	* Format used for generating strings.
14:	*
15:	* @var string
16:	*/
17:	private $generateFormat = 'H:i:s';
18:
19:	/**
20:	* Transforms a \DateTime instance to a string.
21:	*
22:	* @see \DateTime::format() for supported formats
23:	*
24:	* @param string $inputTimezone The name of the input timezone
25:	* @param string $outputTimezone The name of the output timezone
26:	* @param string $format The date format
27:	*
28:	* @throws UnexpectedTypeException if a timezone is not a string
29:	*/
30:	public function __construct($inputTimezone = null, $outputTimezone = null, $format = 'H:i:s')
31:	{
32:	parent::__construct($inputTimezone, $outputTimezone);
33:
34:	if (! empty($format)) $this->generateFormat = $format;
35:	}
36:
37:	/**
38:	* Transforms a DateTime object into a time string with the configured format
39:	* and timezone.
40:	*
41:	* @param \DateTimeInterface $dateTime A DateTimeInterface object
42:	*
43:	* @return string A value as produced by PHP's date() function
44:	*
45:	* @throws TransformationFailedException If the given value is not a \DateTimeInterface
46:	*/
47:	public function reverseTransform($dateTime)
48:	{
49:	if (null === $dateTime) {
50:	return '';
51:	}
52:
53:	if (!$dateTime instanceof \DateTimeInterface) {
54:	throw new TransformationFailedException('Expected a \DateTimeInterface.');
55:	}
56:
57:	if (!$dateTime instanceof \DateTimeImmutable) {
58:	$dateTime = clone $dateTime;
59:	}
60:
61:	$dateTime = $dateTime->setTimezone(new \DateTimeZone($this->outputTimezone));
62:
63:	return $dateTime->format($this->generateFormat);
64:	}
65:
66:	/**
67:	* Transforms a time string in the configured timezone into a DateTime object.
68:	*
69:	* @param string $value A value as produced by PHP's date() function
70:	*
71:	* @return \DateTime\|null An instance of \DateTime
72:	*
73:	* @throws TransformationFailedException If the given value is not a string,
74:	* or could not be transformed
75:	*/
76:	public function transform($value)
77:	{
78:	if (empty($value)) {
79:	return null;
80:	}
81:
82:	if (preg_match('/(\d{1,2})([h:\s]+(\d{1,2})([m:\s]+(\d{1,2}))?)?/i', (string)$value, $m)) {
83:	$value = sprintf('%02d:%02d:%02d', $m[1], isset($m[2]) ? $m[3] : 0, isset($m[4]) ? $m[5] : 0);
84:	}
85:
86:	$outputTz = new \DateTimeZone($this->outputTimezone);
87:	$dateTime = \DateTime::createFromFormat('H:i:s', $value, $outputTz);
88:
89:	$lastErrors = \DateTime::getLastErrors();
90:
91:	if (0 < $lastErrors['warning_count'] \|\| 0 < $lastErrors['error_count']) {
92:	throw new TransformationFailedException(implode(', ', array_merge(array_values($lastErrors['warnings']), array_values($lastErrors['errors']))));
93:	}
94:
95:	try {
96:	if ($this->inputTimezone !== $this->outputTimezone) {
97:	$dateTime->setTimezone(new \DateTimeZone($this->inputTimezone));
98:	}
99:	} catch (\Exception $e) {
100:	throw new TransformationFailedException($e->getMessage(), $e->getCode(), $e);
101:	}
102:
103:	return $dateTime;
104:	}
105:	}
106:

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