File core-bundle/src/Form/DataTransformer/SerializedTransformer.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:	* Transforms between a serialized data (string) and a data structure (mixed).
9:	*
10:	* Example: store a complex data (form compound) into a simple database column (varchar)
11:	*/
12:	class SerializedTransformer implements DataTransformerInterface
13:	{
14:	protected $type = "serialize"; /** json \| serialize (default) */
15:
16:	/**
17:	* Construct the data transformer with parameters (type of serialization).
18:	*
19:	* @param string $type Type of serialization method: json \| serialize (default)
20:	*/
21:	public function __construct(string $type = null)
22:	{
23:	if ($type !== null) $this->type = $type;
24:	}
25:
26:	/**
27:	* Transforms a serialization string into a data structure.
28:	*
29:	* @param string $values Data serialized (all values into one string)
30:	* @return mixed Data structure (array, object, scalar...)
31:	* @throws TransformationFailedException If the given value is not a serialization.
32:	*/
33:	public function transform(mixed $values = null): mixed
34:	{
35:	if ($values === null) return null;
36:	# if (! \is_string($values)) return $values;
37:	if (! \is_string($values)) throw new TransformationFailedException("Expected a string.");
38:
39:	try {
40:	switch ($this->type) {
41:	case 'json' : return \json_decode($values, true, 512, JSON_THROW_ON_ERROR);
42:	default : return \unserialize($values);
43:	}
44:	} catch (\Exception $e) { throw new TransformationFailedException("Failed to unserialize: ".$e->getMessage());
45:	} catch (\TypeError $t) { throw new TransformationFailedException("Failed to unserialize: ".$t->getMessage());
46:	}
47:	}
48:
49:	/**
50:	* Transforms a data structure into a serialization string.
51:	*
52:	* @param mixed $values Data structure (array, object, scalar...)
53:	* @return string Data serialized (all values into one string)
54:	*/
55:	public function reverseTransform(mixed $values = null): ?string
56:	{
57:	if ($values === null) return null;
58:
59:	try {
60:	switch ($this->type) {
61:	case 'json' : return \json_encode($values, 512, JSON_THROW_ON_ERROR);
62:	default : return \serialize($values);
63:	}
64:	} catch (\Exception $e) { throw new TransformationFailedException("Failed to unserialize: ".$e->getMessage());
65:	} catch (\TypeError $t) { throw new TransformationFailedException("Failed to unserialize: ".$t->getMessage());
66:	}
67:	}
68:
69:	}
70:

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