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<?php |
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declare(strict_types=1); |
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namespace Doctrine\SkeletonMapper\DataSource; |
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use InvalidArgumentException; |
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use function count; |
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use function is_string; |
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use function sprintf; |
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use function strtolower; |
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class Sorter |
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{ |
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private const ORDER_ASC = 'asc'; |
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private const ORDER_DESC = 'desc'; |
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/** @var int */ |
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private $level = 0; |
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/** @var string[] */ |
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private $fields; |
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/** @var int[] */ |
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private $orders; |
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/** |
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* @param string[] $orderBy |
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*/ |
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public function __construct(array $orderBy) |
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{ |
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if ($orderBy === []) { |
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throw new InvalidArgumentException('The Sorter class does not accept an empty $orderBy'); |
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} |
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foreach ($orderBy as $field => $order) { |
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$this->fields[] = $field; |
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$this->orders[] = $this->getOrder($order); |
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} |
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} |
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/** |
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* @param mixed[] $a |
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* @param mixed[] $b |
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*/ |
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public function __invoke(array $a, array $b) : int |
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{ |
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$returnVal = 0; |
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$comparisonField = $this->fields[$this->level]; |
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$order = $this->orders[$this->level]; |
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$aComparisonField = $this->getComparisonField($a, $comparisonField); |
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$bComparisonField = $this->getComparisonField($b, $comparisonField); |
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$comparisonResult = $aComparisonField <=> $bComparisonField; |
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if ($comparisonResult !== 0) { |
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$returnVal = $comparisonResult; |
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} else { |
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if ($this->level < count($this->fields) - 1) { |
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$this->level++; |
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return $this->__invoke($a, $b); |
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} |
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} |
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$returnVal *= $order; |
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$this->level = 0; |
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return $returnVal; |
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} |
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private function getOrder(string $order) : int |
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{ |
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$lowercaseOrder = strtolower($order); |
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if ($lowercaseOrder === self::ORDER_ASC) { |
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return 1; |
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} |
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if ($lowercaseOrder === self::ORDER_DESC) { |
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return -1; |
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} |
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throw new InvalidArgumentException(sprintf( |
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'$order value of %s is not accepted. Only a value of asc or desc is allowed.', |
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$order |
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)); |
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} |
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/** |
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* @param mixed[] $item |
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* |
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* @return mixed |
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*/ |
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private function getComparisonField(array $item, string $field) |
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{ |
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if (! isset($item[$field])) { |
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throw new InvalidArgumentException(sprintf('Unable to find comparison field %s', $field)); |
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} |
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$value = $item[$field]; |
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return is_string($value) ? strtolower($value) : $value; |
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} |
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} |
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doctrine /
skeleton-mapper
