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<?php |
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declare(strict_types=1); |
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namespace Umbrellio\LTree\Relations; |
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use Illuminate\Database\Eloquent\Builder; |
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use Illuminate\Database\Eloquent\Collection; |
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use Illuminate\Database\Eloquent\Model; |
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use Illuminate\Database\Eloquent\Relations\Relation; |
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use Illuminate\Database\Query\JoinClause; |
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use Umbrellio\LTree\Interfaces\LTreeModelInterface; |
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use Umbrellio\LTree\Traits\LTreeModelTrait; |
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abstract class AbstractBelongsToTree extends Relation |
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{ |
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protected $throughRelationName; |
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private $foreignKey; |
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private $ownerKey; |
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public function __construct( |
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Builder $query, |
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Model $child, |
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string $throughRelationName, |
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string $foreignKey, |
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string $ownerKey |
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) { |
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$this->throughRelationName = $throughRelationName; |
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$this->foreignKey = $foreignKey; |
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$this->ownerKey = $ownerKey; |
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parent::__construct($query, $child); |
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} |
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public function addConstraints(): void |
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{ |
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if (static::$constraints) { |
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$relation = $this->parent->{$this->throughRelationName}; |
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if ($relation) { |
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$this->query = $this->getQueryForTree($relation); |
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} |
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} |
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} |
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public function addEagerConstraints(array $models): void |
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{ |
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$key = $this->related->getTable() . '.' . $this->ownerKey; |
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$whereIn = $this->whereInMethod($this->related, $this->ownerKey); |
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$this->query->{$whereIn}($key, $this->getEagerModelKeys($models)); |
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$table = $this |
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->getModel() |
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->getTable(); |
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$alias = sprintf('%s_depends', $table); |
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$related = $this->getLTreeRelated(); |
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$this->query->join( |
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sprintf('%s as %s', $table, $alias), |
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function (JoinClause $query) use ($alias, $table, $related) { |
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$query->whereRaw(sprintf( |
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'%1$s.%2$s %4$s %3$s.%2$s', |
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$alias, |
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$related->getLtreePathColumn(), |
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$table, |
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$this->getOperator() |
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)); |
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} |
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); |
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$this->query->orderBy($related->getLtreePathColumn()); |
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$this->query->selectRaw(sprintf('%s.*, %s.%s as relation_id', $alias, $table, $this->ownerKey)); |
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} |
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public function match(array $models, Collection $results, $relation) |
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{ |
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$dictionary = []; |
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foreach ($results as $result) { |
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$dictionary[$result->relation_id][] = $result; |
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} |
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foreach ($models as $model) { |
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foreach ($dictionary as $related => $value) { |
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if ($model->getAttribute($this->foreignKey) === $related) { |
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$model->setRelation($relation, $this->related->newCollection($value)); |
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} |
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} |
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} |
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return $models; |
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} |
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public function getResults() |
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{ |
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return $this->getParentKey() !== null |
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? $this->query->get() |
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: $this->related->newCollection(); |
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} |
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/** |
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* Initialize the relation on a set of models. |
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* |
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* @param string $relation |
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* @return array |
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*/ |
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public function initRelation(array $models, $relation) |
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{ |
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foreach ($models as $model) { |
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$model->setRelation($relation, $this->related->newCollection()); |
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} |
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return $models; |
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} |
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/** |
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* @param Builder|LTreeModelTrait $model |
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*/ |
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abstract protected function getQueryForTree($model): Builder; |
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abstract protected function getOperator(): string; |
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protected function getEagerModelKeys(array $models) |
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{ |
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$keys = []; |
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foreach ($models as $model) { |
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if (($value = $model->{$this->foreignKey}) !== null) { |
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$keys[] = $value; |
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} |
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} |
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sort($keys); |
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return array_values(array_unique($keys)); |
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} |
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protected function getLTreeRelated(): LTreeModelInterface |
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{ |
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return $this |
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->parent |
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->{$this->throughRelationName}() |
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->related; |
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} |
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private function getParentKey() |
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{ |
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return $this->parent->{$this->foreignKey}; |
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} |
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} |
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umbrellio /
laravel-ltree
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