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<?php |
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/* |
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* This file is part of the Symfony package. |
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* |
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* (c) Fabien Potencier <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Black\Component\Common\Application\Form\Transformer; |
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use Symfony\Component\Form\DataTransformerInterface; |
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use Symfony\Component\Form\Exception\TransformationFailedException; |
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/** |
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* Transforms between a delimited string (e.g. a string delimited |
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* by commas) and an array. |
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* |
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* @author Daniel Leech <[email protected]> |
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*/ |
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class ArrayToDelimitedStringTransformer implements DataTransformerInterface |
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{ |
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private $delimiter; |
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private $paddingLeft; |
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private $paddingRight; |
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/** |
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* Constructor |
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* |
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* @param string $delimiter The delimiter to use when transforming from |
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* a string to an array and vice-versa |
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* @param integer Number of spaces before each transformed array element |
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* @param integer Number of spaces after each transformed array element |
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*/ |
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public function __construct($delimiter = ',', $paddingLeft = 0, $paddingRight = 1) |
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{ |
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$this->delimiter = $delimiter; |
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$this->paddingLeft = $paddingLeft; |
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$this->paddingRight = $paddingRight; |
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} |
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/** |
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* Transforms an array into a delimited string |
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* |
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* @param array $array Array to transform |
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* |
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* @return string |
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* |
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* @throws TransformationFailedException If the given value is not an array |
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*/ |
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public function transform($array) |
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{ |
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if (null === $array) { |
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return ''; |
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} |
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if (!is_array($array)) { |
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throw new TransformationFailedException('Expected an array.'); |
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} |
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foreach ($array as &$value) { |
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$value = sprintf('%s%s%s', |
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str_repeat(' ', $this->paddingLeft), |
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$value, |
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str_repeat(' ', $this->paddingRight) |
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); |
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} |
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$string = trim(implode($this->delimiter, $array)); |
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return $string; |
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} |
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/** |
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* Transforms a delimited string into an array |
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* |
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* @param string $string String to transform |
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* |
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* @return array |
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* |
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* @throws TransformationFailedException If the given value is not a string |
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*/ |
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public function reverseTransform($string) |
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{ |
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if (null !== $string && !is_string($string)) { |
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throw new TransformationFailedException('Expected a string.'); |
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} |
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$string = trim($string); |
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if (empty($string)) { |
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return array(); |
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} |
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$values = explode($this->delimiter, $string); |
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if (0 === count($values)) { |
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return array(); |
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} |
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foreach ($values as &$value) { |
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$value = trim($value); |
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} |
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return $values; |
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} |
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} |
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black-project /
common
