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<?php |
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/** |
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* Cycle DataMapper ORM |
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* |
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* @license MIT |
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* @author Anton Titov (Wolfy-J) |
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*/ |
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declare(strict_types=1); |
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namespace Cycle\ORM\Heap; |
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use IteratorAggregate; |
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use SplObjectStorage; |
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use UnexpectedValueException; |
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final class Heap implements HeapInterface, IteratorAggregate |
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{ |
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/** @var SplObjectStorage */ |
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private $storage; |
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/** @var array */ |
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private $paths = []; |
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/** |
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* Heap constructor. |
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*/ |
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public function __construct() |
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{ |
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$this->clean(); |
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} |
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/** |
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* Heap destructor. |
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*/ |
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public function __destruct() |
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{ |
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$this->clean(); |
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} |
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public function getIterator(): SplObjectStorage |
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{ |
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return clone $this->storage; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function has($entity): bool |
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{ |
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return $this->storage->offsetExists($entity); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function get($entity): ?Node |
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{ |
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try { |
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return $this->storage->offsetGet($entity); |
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} catch (UnexpectedValueException $e) { |
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return null; |
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} |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function find(string $role, array $scope) |
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{ |
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if (count($scope) === 1) { |
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$key = key($scope); |
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if (is_object($scope[$key])) { |
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$scope[$key] = (string)$scope[$key]; |
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} |
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return $this->paths[$role][$key][$scope[$key]] ?? null; |
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} |
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$key = $value = ''; |
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foreach ($scope as $k => $v) { |
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$key .= $k; |
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$value .= $v . '/'; |
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} |
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return $this->paths[$role][$key][$value] ?? null; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function attach($entity, Node $node, array $index = []): void |
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{ |
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$this->storage->offsetSet($entity, $node); |
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$role = $node->getRole(); |
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if ($node->hasState()) { |
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$this->eraseIndexes($role, $node->getInitialData(), $entity); |
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} |
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$data = $node->getData(); |
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foreach ($index as $key) { |
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if (is_array($key)) { |
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$keyName = $value = ''; |
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foreach ($key as $k) { |
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$keyName .= $k; // chance of collision? |
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$value .= (string)$data[$k] . '/'; |
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} |
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$key = $keyName; |
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} else { |
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if (!isset($data[$key])) { |
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continue; |
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} |
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$value = (string)$data[$key]; |
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} |
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$this->paths[$role][$key][$value] = $entity; |
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} |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function detach($entity): void |
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{ |
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$node = $this->get($entity); |
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if ($node === null) { |
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return; |
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} |
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$role = $node->getRole(); |
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$this->eraseIndexes($role, $node->getData(), $entity); |
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if ($node->hasState()) { |
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$this->eraseIndexes($role, $node->getInitialData(), $entity); |
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} |
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$this->storage->offsetUnset($entity); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function clean(): void |
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{ |
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$this->paths = []; |
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$this->storage = new \SplObjectStorage(); |
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} |
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private function eraseIndexes(string $role, array $data, object $entity): void |
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{ |
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if (!isset($this->paths[$role])) { |
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return; |
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} |
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$keys = array_keys($this->paths[$role]); |
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foreach ($keys as $key) { |
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$value = isset($data[$key]) ? (string)$data[$key] : null; |
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if ($value === null) { |
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continue; |
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} |
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$current = &$this->paths[$role][$key]; |
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if (isset($current[$value]) && $current[$value] === $entity) { |
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unset($current[$value]); |
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} |
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} |
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} |
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} |
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cycle /
orm
