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<?php |
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/** |
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* Created by Marcin. |
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* Date: 16.06.2018 |
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* Time: 13:58 |
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*/ |
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namespace mrcnpdlk\Lib\UrlSearchParser\Criteria; |
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use mrcnpdlk\Lib\UrlSearchParser\Exception; |
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use mrcnpdlk\Lib\UrlSearchParser\Exception\EmptyParamException; |
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use Traversable; |
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class Sort implements \IteratorAggregate |
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{ |
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public const DIRECTION_ASC = 'ASC'; |
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public const DIRECTION_DESC = 'DESC'; |
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public const DELIMITER = ','; |
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public const DESC_IDENTIFIER = '-'; |
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/** |
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* @var \mrcnpdlk\Lib\UrlSearchParser\Criteria\SortParam[] |
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*/ |
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private $params = []; |
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/** |
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* Sort constructor. |
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* |
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* @param string|null $sortString |
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* |
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* @throws \mrcnpdlk\Lib\UrlSearchParser\Exception\EmptyParamException |
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*/ |
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public function __construct(string $sortString = null) |
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{ |
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/** |
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* @var string[] $tParams |
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* @var string $param |
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*/ |
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$tParams = $sortString ? explode(self::DELIMITER, $sortString) : []; |
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foreach ($tParams as $param) { |
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if (empty($param)) { |
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throw new EmptyParamException(sprintf('Empty SORT param')); |
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} |
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if ($param[0] === self::DESC_IDENTIFIER) { |
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$param = substr($param, 1); |
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if (empty($param)) { |
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throw new EmptyParamException(sprintf('Empty SORT param')); |
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} |
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$this->params[] = new SortParam($param, self::DIRECTION_DESC); |
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} else { |
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$this->params[] = new SortParam($param, self::DIRECTION_ASC); |
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} |
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} |
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} |
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/** |
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* Retrieve an external iterator |
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* |
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* @link http://php.net/manual/en/iteratoraggregate.getiterator.php |
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* @return Traversable An instance of an object implementing <b>Iterator</b> or |
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* <b>Traversable</b> |
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* @since 5.0.0 |
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*/ |
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public function getIterator(): Traversable |
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{ |
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return new \ArrayIterator($this->params); |
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} |
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/** |
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* @return \mrcnpdlk\Lib\UrlSearchParser\Criteria\SortParam[] |
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*/ |
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public function toArray(): array |
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{ |
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return $this->params; |
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} |
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} |
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mrcnpdlk /
url-search-parser
