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<?php |
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declare(strict_types=1); |
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namespace ApiSkeletons\Doctrine\ORM\GraphQL\Resolve; |
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use ApiSkeletons\Doctrine\ORM\GraphQL\Config; |
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use ApiSkeletons\Doctrine\ORM\GraphQL\Event\QueryBuilder as QueryBuilderEvent; |
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use ApiSkeletons\Doctrine\ORM\GraphQL\Filter\QueryBuilder as QueryBuilderFilter; |
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use ApiSkeletons\Doctrine\ORM\GraphQL\Type\Entity\Entity; |
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use ArrayObject; |
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use Closure; |
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use Doctrine\ORM\EntityManager; |
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use Doctrine\ORM\QueryBuilder; |
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use Doctrine\ORM\Tools\Pagination\Paginator; |
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use GraphQL\Type\Definition\ResolveInfo; |
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use League\Event\EventDispatcher; |
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use function base64_decode; |
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use function base64_encode; |
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/** |
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* Build a resolver for entities |
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*/ |
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class ResolveEntityFactory |
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{ |
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public function __construct( |
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protected readonly Config $config, |
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protected readonly EntityManager $entityManager, |
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protected readonly EventDispatcher $eventDispatcher, |
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protected readonly ArrayObject $metadata, |
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) { |
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} |
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public function get(Entity $entity, string|null $eventName): Closure |
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{ |
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return function ($objectValue, array $args, $context, ResolveInfo $info) use ($entity, $eventName) { |
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$entityClass = $entity->getEntityClass(); |
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$queryBuilderFilter = new QueryBuilderFilter(); |
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$queryBuilder = $this->entityManager->createQueryBuilder(); |
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$queryBuilder->select('entity') |
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->from($entityClass, 'entity'); |
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if (isset($args['filter'])) { |
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$queryBuilderFilter->apply($args['filter'], $queryBuilder, $entity); |
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} |
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return $this->buildPagination( |
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entity: $entity, |
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queryBuilder: $queryBuilder, |
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eventName: $eventName, |
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objectValue: $objectValue, |
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args: $args, |
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context: $context, |
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info: $info, |
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); |
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}; |
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} |
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/** @return mixed[] */ |
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public function buildPagination( |
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Entity $entity, |
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QueryBuilder $queryBuilder, |
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string|null $eventName, |
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mixed ...$resolve, |
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): array { |
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$paginationFields = [ |
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'first' => 0, |
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'last' => 0, |
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'before' => 0, |
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'after' => 0, |
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]; |
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if (isset($resolve['args']['pagination'])) { |
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foreach ($resolve['args']['pagination'] as $field => $value) { |
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$paginationFields[$field] = $value; |
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if ($field === 'after') { |
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$paginationFields[$field] = (int) base64_decode($value, true) + 1; |
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} |
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if ($field !== 'before') { |
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continue; |
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} |
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$paginationFields[$field] = (int) base64_decode($value, true); |
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} |
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} |
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$offsetAndLimit = $this->calculateOffsetAndLimit($entity, $paginationFields); |
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if ($offsetAndLimit['offset']) { |
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$queryBuilder->setFirstResult($offsetAndLimit['offset']); |
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} |
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if ($offsetAndLimit['limit']) { |
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$queryBuilder->setMaxResults($offsetAndLimit['limit']); |
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} |
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/** |
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* Fire the event dispatcher using the passed event name. |
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* Include all resolve variables. |
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*/ |
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if ($eventName) { |
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$this->eventDispatcher->dispatch( |
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new QueryBuilderEvent( |
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$queryBuilder, |
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$eventName, |
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...$resolve, |
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), |
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); |
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} |
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$edgesAndCursors = $this->buildEdgesAndCursors($queryBuilder, $offsetAndLimit, $paginationFields); |
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return [ |
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'edges' => $edgesAndCursors['edges'], |
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'totalCount' => $edgesAndCursors['totalCount'], |
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'pageInfo' => [ |
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'endCursor' => $edgesAndCursors['cursors']['end'], |
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'startCursor' => $edgesAndCursors['cursors']['start'], |
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'hasNextPage' => $edgesAndCursors['cursors']['end'] !== $edgesAndCursors['cursors']['last'], |
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'hasPreviousPage' => $edgesAndCursors['cursors']['first'] !== null |
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&& $edgesAndCursors['cursors']['start'] !== $edgesAndCursors['cursors']['first'], |
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], |
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]; |
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} |
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/** |
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* @param array<string, int> $offsetAndLimit |
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* @param array<string, int> $paginationFields |
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* |
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* @return array<string, mixed> |
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*/ |
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protected function buildEdgesAndCursors(QueryBuilder $queryBuilder, array $offsetAndLimit, array $paginationFields): array |
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{ |
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$index = 0; |
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$edges = []; |
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$cursors = [ |
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'start' => base64_encode((string) 0), |
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'first' => null, |
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'last' => base64_encode((string) 0), |
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]; |
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$paginator = new Paginator($queryBuilder->getQuery()); |
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$itemCount = $paginator->count(); |
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// Rebuild paginator if needed |
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if ($paginationFields['last'] && ! $paginationFields['before']) { |
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$offsetAndLimit['offset'] = $itemCount - $paginationFields['last']; |
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$queryBuilder->setFirstResult($offsetAndLimit['offset']); |
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$paginator = new Paginator($queryBuilder->getQuery()); |
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} |
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foreach ($paginator->getQuery()->getResult() as $result) { |
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$cursors['last'] = base64_encode((string) ($index + $offsetAndLimit['offset'])); |
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$edges[] = [ |
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'node' => $result, |
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'cursor' => $cursors['last'], |
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]; |
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if (! $cursors['first']) { |
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$cursors['first'] = $cursors['last']; |
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} |
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$index++; |
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} |
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$endIndex = $paginator->count() ? $paginator->count() - 1 : 0; |
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$cursors['end'] = base64_encode((string) $endIndex); |
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return [ |
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'cursors' => $cursors, |
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'edges' => $edges, |
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'totalCount' => $paginator->count(), |
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]; |
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} |
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/** |
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* @param array<string, int> $paginationFields |
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* |
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* @return array<string, int> |
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*/ |
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protected function calculateOffsetAndLimit(Entity $entity, array $paginationFields): array |
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{ |
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$offset = 0; |
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$limit = $this->metadata[$entity->getEntityClass()]['limit']; |
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if (! $limit) { |
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$limit = $this->config->getLimit(); |
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} |
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$adjustedLimit = $paginationFields['first'] ?: $paginationFields['last'] ?: $limit; |
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if ($adjustedLimit < $limit) { |
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$limit = $adjustedLimit; |
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} |
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if ($paginationFields['after']) { |
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$offset = $paginationFields['after']; |
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} elseif ($paginationFields['before']) { |
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$offset = $paginationFields['before'] - $limit; |
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} |
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if ($offset < 0) { |
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$limit += $offset; |
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$offset = 0; |
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} |
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return [ |
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'offset' => $offset, |
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'limit' => $limit, |
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]; |
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} |
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} |
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API-Skeletons /
doctrine-orm-graphql
