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<?php |
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/* |
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* This file is part of the API Platform project. |
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* |
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* (c) Kévin Dunglas <[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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declare(strict_types=1); |
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namespace ApiPlatform\Core\DataProvider; |
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use ApiPlatform\Core\Exception\InvalidArgumentException; |
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use ApiPlatform\Core\Metadata\Resource\Factory\ResourceMetadataFactoryInterface; |
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/** |
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* Pagination configuration. |
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* |
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* @author Baptiste Meyer <[email protected]> |
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*/ |
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final class Pagination |
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{ |
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private $options; |
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private $resourceMetadataFactory; |
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public function __construct(ResourceMetadataFactoryInterface $resourceMetadataFactory, array $options = []) |
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{ |
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$this->resourceMetadataFactory = $resourceMetadataFactory; |
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$this->options = array_merge([ |
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'enabled' => true, |
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'client_enabled' => false, |
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'client_items_per_page' => false, |
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'items_per_page' => 30, |
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'page_default' => 1, |
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'page_parameter_name' => 'page', |
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'enabled_parameter_name' => 'pagination', |
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'items_per_page_parameter_name' => 'itemsPerPage', |
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'maximum_items_per_page' => null, |
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'partial' => false, |
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'client_partial' => false, |
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'partial_parameter_name' => 'partial', |
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], $options); |
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} |
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/** |
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* Gets the current page. |
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* |
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* @throws InvalidArgumentException |
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*/ |
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public function getPage(array $context = []): int |
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{ |
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$page = (int) $this->getParameterFromContext( |
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$context, |
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$this->options['page_parameter_name'], |
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$this->options['page_default'] |
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); |
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if (1 > $page) { |
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throw new InvalidArgumentException('Page should not be less than 1'); |
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} |
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return $page; |
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} |
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/** |
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* Gets the current offset. |
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*/ |
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public function getOffset(string $resourceClass = null, string $operationName = null, array $context = []): int |
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{ |
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$graphql = $context['graphql'] ?? false; |
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$limit = $this->getLimit($resourceClass, $operationName, $context); |
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if ($graphql && null !== ($after = $this->getParameterFromContext($context, 'after'))) { |
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return false === ($after = base64_decode($after, true)) ? 0 : (int) $after + 1; |
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} |
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if ($graphql && null !== ($before = $this->getParameterFromContext($context, 'before'))) { |
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return ($offset = (false === ($before = base64_decode($before, true)) ? 0 : (int) $before - $limit)) < 0 ? 0 : $offset; |
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} |
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if ($graphql && null !== ($last = $this->getParameterFromContext($context, 'last'))) { |
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return ($offset = ($context['count'] ?? 0) - $last) < 0 ? 0 : $offset; |
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} |
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return ($this->getPage($context) - 1) * $limit; |
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} |
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/** |
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* Gets the current limit. |
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* |
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* @throws InvalidArgumentException |
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*/ |
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public function getLimit(string $resourceClass = null, string $operationName = null, array $context = []): int |
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{ |
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$graphql = $context['graphql'] ?? false; |
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$limit = $this->options['items_per_page']; |
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$clientLimit = $this->options['client_items_per_page']; |
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if (null !== $resourceClass) { |
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$resourceMetadata = $this->resourceMetadataFactory->create($resourceClass); |
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$limit = $resourceMetadata->getCollectionOperationAttribute($operationName, 'pagination_items_per_page', $limit, true); |
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$clientLimit = $resourceMetadata->getCollectionOperationAttribute($operationName, 'pagination_client_items_per_page', $clientLimit, true); |
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} |
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if ($graphql && null !== ($first = $this->getParameterFromContext($context, 'first'))) { |
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$limit = $first; |
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} |
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if ($graphql && null !== ($last = $this->getParameterFromContext($context, 'last'))) { |
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$limit = $last; |
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} |
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if ($graphql && null !== ($before = $this->getParameterFromContext($context, 'before')) |
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&& (false === ($before = base64_decode($before, true)) ? 0 : (int) $before - $limit) < 0) { |
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$limit = (int) $before; |
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} |
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if ($clientLimit) { |
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$limit = (int) $this->getParameterFromContext($context, $this->options['items_per_page_parameter_name'], $limit); |
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$maxItemsPerPage = $this->options['maximum_items_per_page']; |
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if (null !== $resourceClass) { |
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$resourceMetadata = $this->resourceMetadataFactory->create($resourceClass); |
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$maxItemsPerPage = $resourceMetadata->getCollectionOperationAttribute($operationName, 'maximum_items_per_page', $maxItemsPerPage, true); |
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} |
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if (null !== $maxItemsPerPage && $limit > $maxItemsPerPage) { |
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$limit = $maxItemsPerPage; |
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} |
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} |
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if (0 > $limit) { |
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throw new InvalidArgumentException('Limit should not be less than 0'); |
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} |
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return $limit; |
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} |
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/** |
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* Gets info about the pagination. |
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* |
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* Returns an array with the following info as values: |
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* - the page {@see Pagination::getPage()} |
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* - the offset {@see Pagination::getOffset()} |
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* - the limit {@see Pagination::getLimit()} |
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* |
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* @throws InvalidArgumentException |
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*/ |
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public function getPagination(string $resourceClass = null, string $operationName = null, array $context = []): array |
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{ |
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$page = $this->getPage($context); |
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$limit = $this->getLimit($resourceClass, $operationName, $context); |
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if (0 === $limit && 1 < $page) { |
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throw new InvalidArgumentException('Page should not be greater than 1 if limit is equal to 0'); |
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} |
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return [$page, $this->getOffset($resourceClass, $operationName, $context), $limit]; |
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} |
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/** |
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* Is the pagination enabled? |
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*/ |
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public function isEnabled(string $resourceClass = null, string $operationName = null, array $context = []): bool |
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{ |
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return $this->getEnabled($context, $resourceClass, $operationName); |
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} |
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/** |
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* Is the partial pagination enabled? |
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*/ |
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public function isPartialEnabled(string $resourceClass = null, string $operationName = null, array $context = []): bool |
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{ |
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return $this->getEnabled($context, $resourceClass, $operationName, true); |
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} |
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/** |
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* Is the classic or partial pagination enabled? |
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*/ |
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private function getEnabled(array $context, string $resourceClass = null, string $operationName = null, bool $partial = false): bool |
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{ |
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$enabled = $this->options[$partial ? 'partial' : 'enabled']; |
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$clientEnabled = $this->options[$partial ? 'client_partial' : 'client_enabled']; |
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if (null !== $resourceClass) { |
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$resourceMetadata = $this->resourceMetadataFactory->create($resourceClass); |
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$enabled = $resourceMetadata->getCollectionOperationAttribute($operationName, $partial ? 'pagination_partial' : 'pagination_enabled', $enabled, true); |
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$clientEnabled = $resourceMetadata->getCollectionOperationAttribute($operationName, $partial ? 'pagination_client_partial' : 'pagination_client_enabled', $clientEnabled, true); |
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} |
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if ($clientEnabled) { |
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return filter_var($this->getParameterFromContext($context, $this->options[$partial ? 'partial_parameter_name' : 'enabled_parameter_name'], $enabled), FILTER_VALIDATE_BOOLEAN); |
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} |
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return $enabled; |
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} |
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/** |
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* Gets the given pagination parameter name from the given context. |
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* |
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* @param mixed|null $default |
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*/ |
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private function getParameterFromContext(array $context, string $parameterName, $default = null) |
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{ |
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$filters = $context['filters'] ?? []; |
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return \array_key_exists($parameterName, $filters) ? $filters[$parameterName] : $default; |
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} |
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} |
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api-platform /
core
