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<?php |
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/** |
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* @link https://github.com/nnx-framework/entry-name-resolver |
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* @author Malofeykin Andrey <[email protected]> |
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*/ |
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namespace Nnx\EntryNameResolver; |
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use Countable; |
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use Zend\Stdlib\PriorityQueue; |
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/** |
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* Class EntryNameResolver |
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* |
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* @package Nnx\EntryNameResolver\EntryNameResolver |
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*/ |
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class EntryNameResolverChain implements Countable, EntryNameResolverInterface |
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{ |
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/** |
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* Приоритет по умолчанию для резолвера, в момент его добавления в цепочку |
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*/ |
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const DEFAULT_PRIORITY = 1; |
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/** |
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* Цепочка резолверов |
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* |
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* @var PriorityQueue |
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*/ |
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protected $resolvers; |
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/** |
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* EntryNameResolver constructor. |
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*/ |
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public function __construct() |
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{ |
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$this->resolvers = new PriorityQueue(); |
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} |
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/** |
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* Возвращает колличество добавленных резолверов |
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* |
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* @return int |
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*/ |
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public function count() |
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{ |
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return count($this->resolvers); |
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} |
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/** |
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* Добавляет резолвер |
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* |
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* @param EntryNameResolverInterface $resolver |
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* @param int $priority |
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* |
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* @return $this |
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*/ |
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public function attach(EntryNameResolverInterface $resolver, $priority = self::DEFAULT_PRIORITY) |
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{ |
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$this->resolvers->insert( |
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[ |
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'instance' => $resolver, |
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], |
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$priority |
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); |
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return $this; |
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} |
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/** |
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* Добавляет резолвер в начало цепочки |
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* |
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* @param EntryNameResolverInterface $resolver |
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* |
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* @return $this |
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* |
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*/ |
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public function prependResolver(EntryNameResolverInterface $resolver) |
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{ |
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$priority = self::DEFAULT_PRIORITY; |
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if (!$this->resolvers->isEmpty()) { |
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$queue = $this->resolvers->getIterator(); |
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$queue->setExtractFlags(PriorityQueue::EXTR_PRIORITY); |
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$extractedNode = $queue->extract(); |
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$priority = $extractedNode[0] + 1; |
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} |
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$this->resolvers->insert( |
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[ |
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'instance' => $resolver, |
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], |
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$priority |
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); |
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return $this; |
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} |
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/** |
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* @inheritdoc |
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* |
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* @param $entryName |
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* @param null $context |
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* |
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* @return mixed |
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*/ |
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public function resolveEntryNameByContext($entryName, $context = null) |
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{ |
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$resolvers = clone $this->resolvers; |
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$result = null; |
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foreach ($resolvers as $resolverItem) { |
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/** @var EntryNameResolverInterface $resolver */ |
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$resolver = $resolverItem['instance']; |
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$result = $resolver->resolveEntryNameByContext($entryName, $context); |
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if (null !== $result) { |
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break; |
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} |
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} |
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return $result; |
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} |
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} |
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nnx-framework /
entry-name-resolver
