PaginationExtension::applyToCollection() - Code Metrics - Inspection of "[WIP] MongoDB support" - api-platform/core - Measure and Improve Code Quality continuously with Scrutinizer

Passed
Pull Request — master (#2144)

by Alan
created 2018-12-27 10:51 UTC
PaginationExtension::applyToCollection() C

↳ Parent: PaginationExtension
Complexity

Conditions	12
Paths	62
Size

Total Lines	56
Code Lines	36
Duplication

Lines	0
Ratio	0 %
Importance

Changes
Metric	Value
cc	12
eloc	36
nc	62
nop	4
dl	0
loc	56
rs	6.9666
c	0
b	0
f	0
How to fix Long Method Complexity

<?php

/*
 * This file is part of the API Platform project.
 *
 * (c) Kévin Dunglas <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

declare(strict_types=1);
/*
 * This file is part of the API Platform project.
 *
 * (c) Kévin Dunglas <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace ApiPlatform\Core\Bridge\Doctrine\MongoDbOdm\Extension;

use ApiPlatform\Core\Bridge\Doctrine\MongoDbOdm\Paginator;
use ApiPlatform\Core\Exception\InvalidArgumentException;
use ApiPlatform\Core\Metadata\Resource\Factory\ResourceMetadataFactoryInterface;
use ApiPlatform\Core\Metadata\Resource\ResourceMetadata;
use Doctrine\Common\Persistence\ManagerRegistry;
use Doctrine\ODM\MongoDB\Aggregation\Builder;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack;

/**
 * Applies pagination on the Doctrine aggregation for resource collection when enabled.
 *
 * @author Kévin Dunglas <[email protected]>
 * @author Samuel ROZE <[email protected]>
 * @author Alan Poulain <[email protected]>
 */
final class PaginationExtension implements AggregationResultCollectionExtensionInterface
{
    private $managerRegistry;
    private $requestStack;
    private $resourceMetadataFactory;
    private $enabled;
    private $clientEnabled;
    private $clientItemsPerPage;
    private $itemsPerPage;
    private $pageParameterName;
    private $enabledParameterName;
    private $itemsPerPageParameterName;
    private $maximumItemPerPage;

    public function __construct(ManagerRegistry $managerRegistry, RequestStack $requestStack, ResourceMetadataFactoryInterface $resourceMetadataFactory, bool $enabled = true, bool $clientEnabled = false, bool $clientItemsPerPage = false, int $itemsPerPage = 30, string $pageParameterName = 'page', string $enabledParameterName = 'pagination', string $itemsPerPageParameterName = 'itemsPerPage', int $maximumItemPerPage = null)
    {
        $this->managerRegistry = $managerRegistry;
        $this->requestStack = $requestStack;
        $this->resourceMetadataFactory = $resourceMetadataFactory;
        $this->enabled = $enabled;
        $this->clientEnabled = $clientEnabled;
        $this->clientItemsPerPage = $clientItemsPerPage;
        $this->itemsPerPage = $itemsPerPage;
        $this->pageParameterName = $pageParameterName;
        $this->enabledParameterName = $enabledParameterName;
        $this->itemsPerPageParameterName = $itemsPerPageParameterName;
        $this->maximumItemPerPage = $maximumItemPerPage;
    }

    /**
     * {@inheritdoc}
     */
    public function applyToCollection(Builder $aggregationBuilder, string $resourceClass, string $operationName = null, array &$context = [])
    {
        $request = $this->requestStack->getCurrentRequest();
        if (null === $request) {
            return;
        }

        $resourceMetadata = $this->resourceMetadataFactory->create($resourceClass);
        if (!$this->isPaginationEnabled($request, $resourceMetadata, $operationName)) {
            return;
        }

        $itemsPerPage = $resourceMetadata->getCollectionOperationAttribute($operationName, 'pagination_items_per_page', $this->itemsPerPage, true);
        if ($request->attributes->get('_graphql')) {
            $collectionArgs = $request->attributes->get('_graphql_collections_args', []);
            $itemsPerPage = $collectionArgs[$resourceClass]['first'] ?? $itemsPerPage;
        }

        if ($resourceMetadata->getCollectionOperationAttribute($operationName, 'pagination_client_items_per_page', $this->clientItemsPerPage, true)) {
            $maxItemsPerPage = $resourceMetadata->getCollectionOperationAttribute($operationName, 'maximum_items_per_page', $this->maximumItemPerPage, true);

            $itemsPerPage = (int) $this->getPaginationParameter($request, $this->itemsPerPageParameterName, $itemsPerPage);
            $itemsPerPage = (null !== $maxItemsPerPage && $itemsPerPage >= $maxItemsPerPage ? $maxItemsPerPage : $itemsPerPage);
        }

        if (0 >= $itemsPerPage) {
            throw new InvalidArgumentException('Item per page parameter should not be less than 1');
        }

        $page = (int) $this->getPaginationParameter($request, $this->pageParameterName, 1);

        if (1 > $page) {
            throw new InvalidArgumentException('Page should not be less than 1');
        }

        $firstResult = ($page - 1) * $itemsPerPage;
        if ($request->attributes->get('_graphql')) {
            $collectionArgs = $request->attributes->get('_graphql_collections_args', []);
            if (isset($collectionArgs[$resourceClass]['after'])) {
                $after = \base64_decode($collectionArgs[$resourceClass]['after'], true);
                $firstResult = (int) $after;
                $firstResult = false === $after ? $firstResult : ++$firstResult;
            }
        }

        $repository = $this->managerRegistry->getManagerForClass($resourceClass)->getRepository($resourceClass);
        $aggregationBuilder
            ->facet()
            ->field('results')->pipeline(
                $repository->createAggregationBuilder()
                    ->skip($firstResult)
                    ->limit($itemsPerPage)
            )
            ->field('count')->pipeline(
                $repository->createAggregationBuilder()
                    ->count('count')
            );
    }

    /**
     * {@inheritdoc}
     */
    public function supportsResult(string $resourceClass, string $operationName = null, array $context = []): bool
    {
        $request = $this->requestStack->getCurrentRequest();
        if (null === $request) {
            return false;
        }

        $resourceMetadata = $this->resourceMetadataFactory->create($resourceClass);

        return $this->isPaginationEnabled($request, $resourceMetadata, $operationName);
    }

    /**
     * {@inheritdoc}
     */
    public function getResult(Builder $aggregationBuilder, string $resourceClass, string $operationName = null, array $context = [])
    {
        return new Paginator($aggregationBuilder->execute(), $this->managerRegistry->getManagerForClass($resourceClass)->getUnitOfWork(), $resourceClass);
        return new Paginator($aggregationBuilder->execute(), $this->managerRegistry->getManagerForClass($resourceClass)->/** @scrutinizer ignore-call */ getUnitOfWork(), $resourceClass);
    }

    private function isPaginationEnabled(Request $request, ResourceMetadata $resourceMetadata, string $operationName = null): bool
    {
        $enabled = $resourceMetadata->getCollectionOperationAttribute($operationName, 'pagination_enabled', $this->enabled, true);
        $clientEnabled = $resourceMetadata->getCollectionOperationAttribute($operationName, 'pagination_client_enabled', $this->clientEnabled, true);

        if ($clientEnabled) {
            $enabled = filter_var($request->query->get($this->enabledParameterName, $enabled), FILTER_VALIDATE_BOOLEAN);
        }

        return $enabled;
    }

    private function getPaginationParameter(Request $request, string $parameterName, $default = null)
    {
        if (null !== $paginationAttribute = $request->attributes->get('_api_pagination')) {
            return array_key_exists($parameterName, $paginationAttribute) ? $paginationAttribute[$parameterName] : $default;
        }

        return $request->query->get($parameterName, $default);
    }
}

api-platform / core

Pull Request — master (#2144)

PaginationExtension::applyToCollection() C

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

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