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<?php |
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declare(strict_types=1); |
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namespace Sirius\Orm\Relation; |
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use Sirius\Orm\Contract\EntityInterface; |
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use Sirius\Orm\Contract\HydratorInterface; |
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use Sirius\Orm\Entity\LazyAggregate; |
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use Sirius\Orm\Entity\LazyValue; |
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use Sirius\Orm\Entity\Tracker; |
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use Sirius\Orm\Query; |
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class Aggregate |
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{ |
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/** |
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* @var string |
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*/ |
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protected $name; |
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/** |
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* @var Relation |
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*/ |
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protected $relation; |
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/** |
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* @var array |
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*/ |
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protected $options; |
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/** |
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* @var HydratorInterface |
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*/ |
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protected $entityHydrator; |
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/** |
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* @var HydratorInterface |
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*/ |
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protected $foreignEntityHydrator; |
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public function __construct(string $name, Relation $relation, array $options) |
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{ |
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$this->name = $name; |
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$this->relation = $relation; |
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$this->options = $options; |
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$this->entityHydrator = $relation->getNativeMapper()->getHydrator(); |
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} |
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public function getQuery(Tracker $tracker) |
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{ |
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$keys = $this->relation->getKeyPairs(); |
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/** @var Query $query */ |
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$query = $this->relation->getQuery($tracker); |
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$query->resetColumns(); |
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$query->columns(...array_values($keys)); |
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$query->columns(sprintf( |
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'%s as %s', |
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$this->options[RelationConfig::AGG_FUNCTION], |
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$this->name |
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)); |
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$callback = $this->options[RelationConfig::AGG_CALLBACK] ?? null; |
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if (is_callable($callback)) { |
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$query = $callback($query); |
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} |
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$query->groupBy(...array_values($keys)); |
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/** |
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* the query callback for the relation or for the aggregate might implement ORDER_BY |
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* and that would cause issues with MySQL's sql_mode=ONLY_FULL_GROUP_BY |
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*/ |
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$query->resetOrderBy(); |
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/** |
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* just in case a query callback is setting limits |
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*/ |
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$query->resetLimit(); |
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return $query; |
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} |
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public function attachLazyAggregateToEntity(EntityInterface $entity, Tracker $tracker) |
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{ |
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$valueLoader = $tracker->getLazyAggregate($this); |
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$this->entityHydrator->set($entity, $this->name, $valueLoader); |
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} |
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public function attachAggregateToEntity(EntityInterface $entity, array $results) |
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{ |
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$value = null; |
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foreach ($results as $row) { |
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if ($this->entityMatchesRow($entity, $row)) { |
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$value = $row[$this->name] ?? null; |
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} |
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} |
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// we have to do this because some properties may be read only (ie: there is no setter) |
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// using a LazyValue is the only way for the hydrator to inject a value |
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$this->entityHydrator->set($entity, $this->name, new LazyValue($value)); |
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} |
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public function isLazyLoad() |
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{ |
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return ! isset($this->options[RelationConfig::LOAD_STRATEGY]) || |
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$this->options[RelationConfig::LOAD_STRATEGY] == RelationConfig::LOAD_LAZY; |
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} |
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public function isEagerLoad() |
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{ |
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return isset($this->options[RelationConfig::LOAD_STRATEGY]) && |
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$this->options[RelationConfig::LOAD_STRATEGY] == RelationConfig::LOAD_EAGER; |
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} |
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public function getName() |
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{ |
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return $this->name; |
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} |
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private function entityMatchesRow(EntityInterface $entity, $row) |
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{ |
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$keys = $this->relation->getKeyPairs(); |
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foreach ($keys as $nativeCol => $foreignCol) { |
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$entityValue = $this->entityHydrator->get($entity, $nativeCol); |
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$rowValue = $row[$foreignCol]; |
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// if both native and foreign key values are present (not unlinked entities) they must be the same |
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// otherwise we assume that the entities can be linked together |
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if ($entityValue && $rowValue && $entityValue != $rowValue) { |
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return false; |
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} |
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} |
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return true; |
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} |
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} |
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siriusphp /
orm
