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<?php |
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/** |
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* components |
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* |
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* @author Wolfy-J |
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*/ |
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namespace Spiral\ORM\Entities\Nodes\Traits; |
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/** |
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* Trait provides ability for Node to ensure that given data is unique in selection. |
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*/ |
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trait DuplicateTrait |
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{ |
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/** |
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* @invisible |
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* @var array |
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*/ |
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private $duplicateCriteria = []; |
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/** |
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* Aggregated duplicate data. |
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* |
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* @invisible |
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* @var array |
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*/ |
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private $duplicates = []; |
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/** |
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* In many cases (for example if you have inload of HAS_MANY relation) record data can be |
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* replicated by many result rows (duplicated). To prevent wrong data linking we have to |
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* deduplicate such records. This is only internal loader functionality and required due data |
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* tree are built using php references. |
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* |
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* Method will return true if data is unique handled before and false in opposite case. |
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* Provided data array will be automatically linked with it's unique state using references. |
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* |
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* @param array $data Reference to parsed record data, reference will be pointed to valid and |
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* existed data segment if such data was already parsed. |
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* |
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* @return bool |
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*/ |
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protected function deduplicate(array &$data): bool |
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{ |
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$criteria = $this->duplicateCriteria($data); |
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if (isset($this->duplicates[$criteria])) { |
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//Duplicate is presented, let's reduplicate |
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$data = $this->duplicates[$criteria]; |
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//Duplicate is presented |
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return false; |
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} |
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//Remember record to prevent future duplicates |
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$this->duplicates[$criteria] = &$data; |
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return true; |
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} |
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/** |
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* Calculate duplication criteria. |
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* |
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* @param array $data |
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* |
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* @return mixed |
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*/ |
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private function duplicateCriteria(array &$data) |
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{ |
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if (empty($this->duplicateCriteria)) { |
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//It is recommended to use primary keys in every record as it will speed up de-duplication. |
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$criteria = serialize($data); |
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return $criteria; |
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} elseif (count($this->duplicateCriteria) == 1) { |
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$criteria = $data[$this->duplicateCriteria[0]]; |
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return $criteria; |
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} else { |
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$criteria = []; |
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foreach ($this->duplicateCriteria as $column) { |
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$criteria[] = $data[$column]; |
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} |
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$criteria = join('.', $criteria); |
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return $criteria; |
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} |
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} |
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} |
spiral /
components
