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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; |
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use Cycle\ORM\Command\Branch\ContextSequence; |
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use Cycle\ORM\Command\CommandInterface; |
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use Cycle\ORM\Command\ContextCarrierInterface as CC; |
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use Cycle\ORM\Heap\Node; |
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use Cycle\ORM\Promise\ReferenceInterface; |
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use Cycle\ORM\Relation\DependencyInterface; |
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use Cycle\ORM\Relation\RelationInterface; |
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/** |
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* Manages the position of node in the relation graph and provide access to neighbours. |
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*/ |
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final class RelationMap |
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{ |
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/** @var ORMInterface @internal */ |
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private $orm; |
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/** @var RelationInterface[] */ |
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private $relations = []; |
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/** @var DependencyInterface[] */ |
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private $dependencies = []; |
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/** |
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* @param ORMInterface $orm |
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* @param array $relations |
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*/ |
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public function __construct(ORMInterface $orm, array $relations) |
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{ |
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$this->orm = $orm; |
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$this->relations = $relations; |
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foreach ($this->relations as $name => $relation) { |
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if ($relation instanceof DependencyInterface) { |
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$this->dependencies[$name] = $relation; |
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} |
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} |
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} |
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/** |
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* Init relation data in entity data and entity state. |
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* |
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* @param Node $node |
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* @param array $data |
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* @return array |
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*/ |
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public function init(Node $node, array $data): array |
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{ |
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foreach ($this->relations as $name => $relation) { |
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if (!array_key_exists($name, $data)) { |
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if ($node->hasRelation($name)) { |
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continue; |
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} |
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list($data[$name], $orig) = $relation->initPromise($node); |
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$node->setRelation($name, $orig); |
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continue; |
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} |
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$item = $data[$name]; |
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if (is_object($item) || is_null($item)) { |
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// cyclic initialization |
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$node->setRelation($name, $item); |
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continue; |
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} |
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// init relation for the entity and for state and the same time |
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list($data[$name], $orig) = $relation->init($item); |
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$node->setRelation($name, $orig); |
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} |
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return $data; |
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} |
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/** |
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* Queue entity relations. |
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* |
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* @param CC $parentStore |
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* @param object $parentEntity |
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* @param Node $parentNode |
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* @param array $parentData |
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* @return CC |
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*/ |
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public function queueRelations(CC $parentStore, $parentEntity, Node $parentNode, array $parentData): CC |
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{ |
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$state = $parentNode->getState(); |
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$sequence = new ContextSequence(); |
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// queue all "left" graph branches |
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foreach ($this->dependencies as $name => $relation) { |
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if (!$relation->isCascade() || $parentNode->getState()->visited($name)) { |
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continue; |
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} |
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$state->markVisited($name); |
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$command = $this->queueRelation( |
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$parentStore, |
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$parentEntity, |
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$parentNode, |
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$relation, |
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$relation->extract($parentData[$name] ?? null), |
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$parentNode->getRelation($name) |
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); |
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if ($command !== null) { |
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$sequence->addCommand($command); |
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} |
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} |
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// queue target entity |
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$sequence->addPrimary($parentStore); |
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// queue all "right" graph branches |
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foreach ($this->relations as $name => $relation) { |
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if (!$relation->isCascade() || $parentNode->getState()->visited($name)) { |
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continue; |
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} |
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$state->markVisited($name); |
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$command = $this->queueRelation( |
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$parentStore, |
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$parentEntity, |
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$parentNode, |
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$relation, |
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$relation->extract($parentData[$name] ?? null), |
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$parentNode->getRelation($name) |
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); |
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if ($command !== null) { |
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$sequence->addCommand($command); |
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} |
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} |
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if (count($sequence) === 1) { |
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return current($sequence->getCommands()); |
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} |
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return $sequence; |
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} |
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/** |
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* Queue the relation. |
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* |
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* @param CC $parentStore |
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* @param object $parentEntity |
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* @param Node $parentNode |
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* @param RelationInterface $relation |
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* @param mixed $related |
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* @param mixed $original |
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* @return CommandInterface|null |
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*/ |
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private function queueRelation( |
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CC $parentStore, |
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$parentEntity, |
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Node $parentNode, |
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RelationInterface $relation, |
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$related, |
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$original |
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): ?CommandInterface { |
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if (($related instanceof ReferenceInterface || is_null($related)) && $related === $original) { |
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// no changes in non changed promised relation |
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return null; |
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} |
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$relStore = $relation->queue( |
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$parentStore, |
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$parentEntity, |
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$parentNode, |
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$related, |
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$original |
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); |
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// update current relation state |
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$parentNode->getState()->setRelation($relation->getName(), $related); |
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return $relStore; |
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} |
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} |
cycle /
orm
