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<?php |
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declare(strict_types=1); |
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/** |
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* Spiral Framework. |
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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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namespace Cycle\ORM\Relation; |
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use Cycle\ORM\Command\Branch\Condition; |
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use Cycle\ORM\Command\Branch\ContextSequence; |
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use Cycle\ORM\Command\Branch\Nil; |
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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\Traits\PromiseOneTrait; |
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/** |
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* Provides the ability to own and forward context values to child entity. |
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*/ |
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class HasOne extends AbstractRelation |
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{ |
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use PromiseOneTrait; |
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/** |
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* @inheritdoc |
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*/ |
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public function queue(CC $parentStore, $parentEntity, Node $parentNode, $related, $original): CommandInterface |
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{ |
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if ($original instanceof ReferenceInterface) { |
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$original = $this->resolve($original); |
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} |
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if ($related instanceof ReferenceInterface) { |
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$related = $this->resolve($related); |
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} |
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if (is_null($related)) { |
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if ($related === $original) { |
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// no changes |
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return new Nil(); |
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} |
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if (!is_null($original)) { |
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return $this->deleteOriginal($original); |
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} |
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} |
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$resStore = $this->orm->queueStore($related); |
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$relNode = $this->getNode($related, +1); |
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$this->assertValid($relNode); |
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// store command with mounted context paths |
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$relStore = $this->forwardContext($parentNode, $this->innerKey, $resStore, $relNode, $this->outerKey); |
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if (is_null($original)) { |
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return $relStore; |
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} |
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$sequence = new ContextSequence(); |
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$sequence->addCommand($this->deleteOriginal($original)); |
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$sequence->addPrimary($relStore); |
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return $sequence; |
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} |
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/** |
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* Delete original related entity of no other objects reference to it. |
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* |
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* @param object $original |
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* @return CommandInterface |
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*/ |
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protected function deleteOriginal($original): CommandInterface |
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{ |
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$relNode = $this->getNode($original); |
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// only delete original child when no other objects claim it |
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return new Condition($this->orm->queueDelete($original), function () use ($relNode) { |
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return !$relNode->getState()->hasClaims(); |
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}); |
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} |
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} |
cycle /
orm
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