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<?php |
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/******************************************************************************* |
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* This file is part of the GraphQL Bundle package. |
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* |
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* (c) YnloUltratech <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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******************************************************************************/ |
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namespace Ynlo\GraphQLBundle\Query\Node; |
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use Doctrine\ORM\QueryBuilder; |
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use GraphQL\Error\Error; |
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use Ynlo\GraphQLBundle\Definition\ObjectDefinition; |
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use Ynlo\GraphQLBundle\Definition\QueryDefinition; |
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use Ynlo\GraphQLBundle\Model\NodeInterface; |
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use Ynlo\GraphQLBundle\Model\OrderBy; |
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use Ynlo\GraphQLBundle\Resolver\AbstractResolver; |
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/** |
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* Base class to fetch nodes |
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*/ |
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class AllNodes extends AbstractResolver |
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{ |
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/** |
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* @var string |
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*/ |
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protected $queryAlias = 'o'; |
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/** |
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* @var string |
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*/ |
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protected $entity; |
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/** |
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* @var QueryDefinition |
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*/ |
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protected $queryDefinition; |
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/** |
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* @var ObjectDefinition |
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*/ |
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protected $objectDefinition; |
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/** |
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* @param NodeInterface|null $root |
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* @param int|null $first |
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* @param int|null $last |
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* @param OrderBy[] $orderBy |
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* |
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* @return mixed |
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*/ |
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public function __invoke(NodeInterface $root = null, $first = null, $last = null, $orderBy = []) |
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{ |
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$objectType = $this->context->getDefinition()->getType(); |
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$this->queryDefinition = $this->context->getDefinition(); |
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$this->objectDefinition = $this->context->getDefinitionManager()->getType($objectType); |
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$this->entity = $this->context->getDefinitionManager()->getType($objectType)->getClass(); |
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$qb = $this->createQuery(); |
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$this->applyOrderBy($qb, $orderBy); |
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$this->applyLimits($qb, $first, $last); |
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3 |
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if ($root) { |
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$this->applyFilterByParent($qb, $root); |
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} |
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$this->modifyQuery($qb); |
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return $qb->getQuery()->execute(); |
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} |
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/** |
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* @param QueryBuilder $qb |
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*/ |
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public function modifyQuery(QueryBuilder $qb) |
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{ |
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//implements on childs to customize the query |
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} |
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/** |
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* @param QueryBuilder $qb |
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* @param NodeInterface $root |
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*/ |
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protected function applyFilterByParent(QueryBuilder $qb, NodeInterface $root) |
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{ |
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$parentField = null; |
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if ($this->queryDefinition->hasMeta('connection_parent_field')) { |
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$parentField = $this->queryDefinition->getMeta('connection_parent_field'); |
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} |
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if (!$parentField) { |
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throw new \RuntimeException(sprintf('Missing parent field to filter "%s" by given parent. The parentField should be specified in the connection.', $this->queryDefinition->getName())); |
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} |
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if ($this->objectDefinition->hasField($parentField)) { |
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$parentField = $this->objectDefinition->getField($parentField)->getOriginName(); |
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} |
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$paramName = 'root'.mt_rand(); |
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$qb->andWhere(sprintf('%s.%s = :%s', $this->queryAlias, $parentField, $paramName)) |
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->setParameter($paramName, $root); |
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} |
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/** |
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* @param QueryBuilder $qb |
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* @param null $first |
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* @param null $last |
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* |
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* @throws Error |
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*/ |
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protected function applyLimits(QueryBuilder $qb, $first = null, $last = null) |
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{ |
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if (!$first && !$last) { |
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$error = sprintf('You must provide a `first` or `last` value to properly paginate records in "%s" connection.', $this->queryDefinition->getName()); |
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throw new Error($error); |
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} |
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if ($this->queryDefinition->hasMeta('connection_limit')) { |
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$limit = $this->queryDefinition->getMeta('connection_limit'); |
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if ($first > $limit || $last > $limit) { |
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$current = $first ?? $last; |
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$where = $first ? 'first' : 'last'; |
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$error = sprintf( |
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'Requesting %s records for `%s` exceeds the `%s` limit of %s records for "%s" connection', |
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$current, |
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$this->queryDefinition->getName(), |
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$where, |
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$limit, |
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$this->queryDefinition->getName() |
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); |
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throw new Error($error); |
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} |
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} |
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if ($first) { |
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$qb->setMaxResults(abs($first)); |
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} elseif ($last) { |
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$qb->setMaxResults(abs($last)); |
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//invert all orders |
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/** @var \Doctrine\ORM\Query\Expr\OrderBy[] $orders */ |
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$orders = $qb->getDQLPart('orderBy'); |
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$qb->resetDQLPart('orderBy'); |
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foreach ($orders as &$order) { |
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foreach ($order->getParts() as &$part) { |
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if (strpos($part, 'ASC')) { |
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$part = str_replace('ASC', '', $part); |
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$qb->addOrderBy($part, 'DESC'); |
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} else { |
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$part = str_replace('DESC', '', $part); |
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$qb->addOrderBy($part, 'ASC'); |
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} |
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} |
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} |
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} |
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} |
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/** |
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* @param QueryBuilder $qb |
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* @param array $orderBy |
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* |
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* @throws Error |
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*/ |
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protected function applyOrderBy(QueryBuilder $qb, $orderBy) |
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{ |
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$refClass = new \ReflectionClass($this->entity); |
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//TODO: allow sort using nested entities, e.g. profile.username |
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foreach ($orderBy as $order) { |
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$order->getField(); |
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if ($this->objectDefinition->hasField($order->getField())) { |
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$fieldDefinition = $this->objectDefinition->getField($order->getField()); |
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if ($fieldDefinition->getOriginType() === \ReflectionProperty::class) { |
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if ($refClass->hasProperty($fieldDefinition->getOriginName())) { |
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$qb->addOrderBy($this->queryAlias.'.'.$fieldDefinition->getOriginName(), $order->getDirection()); |
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continue; |
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} |
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} |
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} |
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throw new Error(sprintf('The field "%s" its not valid to order in "%s" connection', $order->getField(), $this->queryDefinition->getName())); |
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} |
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} |
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/** |
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* @return QueryBuilder |
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*/ |
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protected function createQuery(): QueryBuilder |
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{ |
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return $this->getManager() |
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->getRepository($this->entity) |
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->createQueryBuilder($this->queryAlias); |
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} |
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} |
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ynloultratech /
graphql-bundle
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