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<?php |
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declare(strict_types=1); |
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namespace Paysera\Pagination\Service\Doctrine; |
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use Doctrine\ORM\Query\Expr\Select; |
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use Doctrine\ORM\QueryBuilder; |
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use Paysera\Pagination\Entity\Doctrine\AnalysedQuery; |
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use Paysera\Pagination\Entity\OrderingConfiguration; |
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use Paysera\Pagination\Entity\Doctrine\ConfiguredQuery; |
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use Paysera\Pagination\Entity\OrderingPair; |
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use Paysera\Pagination\Entity\Pager; |
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use InvalidArgumentException; |
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use Paysera\Pagination\Exception\TooLargeOffsetException; |
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class QueryAnalyser |
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{ |
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const ID_FIELD = 'id'; |
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/** |
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* @internal |
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* @param ConfiguredQuery $configuredQuery |
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* @param Pager $pager |
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* @return AnalysedQuery |
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*/ |
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public function analyseQuery(ConfiguredQuery $configuredQuery, Pager $pager): AnalysedQuery |
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{ |
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$analysedQuery = $this->analyseQueryWithoutPager($configuredQuery); |
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if ($configuredQuery->getQueryModifier() !== null) { |
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$analysedQuery->setQueryModifier($configuredQuery->getQueryModifier()); |
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} |
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if ( |
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$pager->getOffset() !== null |
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&& $configuredQuery->hasMaximumOffset() |
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&& $pager->getOffset() > $configuredQuery->getMaximumOffset() |
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) { |
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throw new TooLargeOffsetException($configuredQuery->getMaximumOffset(), $pager->getOffset()); |
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} |
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$orderingConfigurations = $this->mapToOrderingConfigurations( |
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$configuredQuery, |
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$analysedQuery->getRootAlias(), |
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$pager->getOrderingPairs() |
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); |
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return $analysedQuery |
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->setOrderingConfigurations($orderingConfigurations) |
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; |
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} |
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/** |
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* @internal |
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* @param ConfiguredQuery $configuredQuery |
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* @return AnalysedQuery |
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*/ |
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public function analyseQueryWithoutPager(ConfiguredQuery $configuredQuery): AnalysedQuery |
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{ |
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$queryBuilder = $configuredQuery->getQueryBuilder(); |
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$rootAlias = $this->getRootAlias($queryBuilder); |
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if ($rootAlias === null) { |
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throw new InvalidArgumentException('Invalid QueryBuilder passed - cannot resolve root select alias'); |
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} |
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$analysedQuery = (new AnalysedQuery()) |
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->setQueryBuilder($queryBuilder) |
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->setRootAlias($rootAlias) |
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; |
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if ($configuredQuery->getQueryModifier() !== null) { |
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$analysedQuery->setQueryModifier($configuredQuery->getQueryModifier()); |
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} |
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return $analysedQuery; |
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} |
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/** |
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* @param QueryBuilder $queryBuilder |
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* @return null|string |
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*/ |
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private function getRootAlias(QueryBuilder $queryBuilder) |
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{ |
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$selectDqlParts = $queryBuilder->getDQLPart('select'); |
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if (!isset($selectDqlParts[0])) { |
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return null; |
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} |
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$select = $selectDqlParts[0]; |
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if (!$select instanceof Select) { |
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return null; |
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} |
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$selectParts = $select->getParts(); |
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if (!isset($selectParts[0]) || !is_string($selectParts[0])) { |
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return null; |
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} |
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if (mb_strpos($selectParts[0], '(') !== false) { |
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return null; |
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} |
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if (mb_strpos($selectParts[0], ',') !== false) { |
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return null; |
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} |
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return $selectParts[0]; |
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} |
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/** |
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* @param ConfiguredQuery $configuredQuery |
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* @param string $rootAlias |
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* @param array|OrderingPair[] $orderingPairs |
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* @return array|OrderingConfiguration[] |
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*/ |
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private function mapToOrderingConfigurations( |
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ConfiguredQuery $configuredQuery, |
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string $rootAlias, |
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array $orderingPairs |
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): array { |
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$orderingConfigurations = []; |
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$idIncluded = false; |
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$defaultAscending = null; |
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$orderByIdExpression = sprintf('%s.%s', $rootAlias, self::ID_FIELD); |
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foreach ($orderingPairs as $orderingPair) { |
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$orderingConfiguration = $configuredQuery->getOrderingConfigurationFor($orderingPair->getOrderBy()); |
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if ($orderingPair->isOrderingDirectionSet()) { |
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$orderingConfiguration->setOrderAscending($orderingPair->isOrderAscending()); |
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} |
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if ($orderingConfiguration->getOrderByExpression() === $orderByIdExpression) { |
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$idIncluded = true; |
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} |
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if ($defaultAscending === null) { |
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$defaultAscending = $orderingConfiguration->isOrderAscending(); |
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} |
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$orderingConfigurations[] = $orderingConfiguration; |
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} |
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if ($idIncluded) { |
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return $orderingConfigurations; |
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} |
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$orderingConfigurations[] = (new OrderingConfiguration($orderByIdExpression, self::ID_FIELD)) |
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->setOrderAscending($defaultAscending ?? false) |
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; |
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return $orderingConfigurations; |
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} |
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} |
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