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<?php |
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/** |
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* Spiral, Core Components |
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* |
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* @author Wolfy-J |
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*/ |
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namespace Spiral\ODM\Helpers; |
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use Spiral\Models\AccessorInterface; |
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use Spiral\Models\EntityInterface; |
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use Spiral\ODM\CompositableInterface; |
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use Spiral\ODM\DocumentEntity; |
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use Spiral\ODM\Entities\DocumentSelector; |
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use Spiral\ODM\ODMInterface; |
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use Spiral\ODM\Schemas\Definitions\AggregationDefinition; |
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/** |
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* Provides ability to configure ODM Selector based on values and query template provided by source |
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* model. |
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* |
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* @todo add sorts and limits |
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* @todo implement on query level? |
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* @see AggregationDefinition |
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*/ |
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class AggregationHelper |
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{ |
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/** |
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* @var array |
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*/ |
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private $schema = []; |
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/** |
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* @var DocumentEntity |
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*/ |
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protected $source; |
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/** |
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* @var ODMInterface |
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*/ |
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protected $odm; |
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/** |
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* @param DocumentEntity $source |
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* @param ODMInterface $odm |
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*/ |
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public function __construct(DocumentEntity $source, ODMInterface $odm) |
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{ |
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$this->schema = (array)$odm->define(get_class($source), ODMInterface::D_SCHEMA); |
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$this->source = $source; |
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$this->odm = $odm; |
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} |
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/** |
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* Create aggregation (one or many) based on given source values. |
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* |
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* @param string $aggregation |
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* |
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* @return DocumentSelector|CompositableInterface |
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*/ |
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public function createAggregation(string $aggregation) |
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{ |
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$schema = $this->schema[DocumentEntity::SH_AGGREGATIONS][$aggregation]; |
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//Let's create selector |
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$selector = $this->odm->selector($schema[1]); |
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//Ensure selection query |
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$selector = $this->configureSelector($selector, $schema); |
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if ($schema[0] == DocumentEntity::ONE) { |
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return $selector->findOne(); |
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} |
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return $selector; |
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} |
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/** |
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* Configure DocumentSelector using aggregation schema. |
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* |
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* @param DocumentSelector $selector |
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* @param array $aggregation |
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* |
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* @return DocumentSelector |
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*/ |
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protected function configureSelector( |
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DocumentSelector $selector, |
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array $aggregation |
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): DocumentSelector { |
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//@see AggregationDefinition |
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$query = $aggregation[2]; |
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//Mounting selection values |
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array_walk_recursive($query, function (&$value) { |
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if (strpos($value, 'self::') === 0) { |
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$value = $this->findValue(substr($value, 6)); |
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} |
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}); |
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return $selector->where($query); |
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} |
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/** |
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* Find field value using dot notation. |
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* |
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* @param string $name |
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* |
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* @return mixed|null |
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*/ |
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private function findValue(string $name) |
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{ |
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$source = $this->source; |
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$path = explode('.', $name); |
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foreach ($path as $step) { |
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if ($source instanceof EntityInterface) { |
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if (!$source->hasField($step)) { |
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return null; |
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} |
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//Sub entity or field |
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$source = $source->getField($step); |
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continue; |
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} |
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if ($source instanceof AccessorInterface) { |
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$source = $source->packValue(); |
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continue; |
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} |
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if (is_array($source) && array_key_exists($step, $source)) { |
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$source = &$source[$step]; |
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continue; |
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} |
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//Unable to resolve value, an exception required here |
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return null; |
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} |
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return $source; |
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} |
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} |
spiral /
odm
