ResolveCollectionFactory::buildPagination() - Code Metrics - Inspection of "Simplify ResolveCollectionFactory pass 1" - API-Skeletons/doctrine-graphql - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — main (#126)

by Tom

created 2023-02-01 21:21 UTC

ResolveCollectionFactory::buildPagination() D

↳ Parent: ResolveCollectionFactory

Complexity

Conditions	11
Paths	384

Size

Total Lines	90
Code Lines	54

Duplication

Lines	0
Ratio	0 %

Importance

Changes	2
Bugs	0	Features	0

Metric	Value
cc	11
eloc	54
c	2
b	0
f	0
nc	384
nop	5
dl	0
loc	90
rs	4.3503

How to fix Long Method Complexity

<?php

declare(strict_types=1);

namespace ApiSkeletons\Doctrine\GraphQL\Resolve;

use ApiSkeletons\Doctrine\GraphQL\Config;
use ApiSkeletons\Doctrine\GraphQL\Criteria\Filters as FiltersDef;
use ApiSkeletons\Doctrine\GraphQL\Event\FilterCriteria;
use ApiSkeletons\Doctrine\GraphQL\Metadata\Metadata;
use ApiSkeletons\Doctrine\GraphQL\Type\Entity;
use ApiSkeletons\Doctrine\GraphQL\Type\TypeManager;
use Closure;
use Doctrine\Common\Collections\Criteria;
use Doctrine\Common\Util\ClassUtils;
use Doctrine\ORM\EntityManager;
use Doctrine\ORM\Mapping\ClassMetadata;
use Doctrine\ORM\PersistentCollection;
use GraphQL\Type\Definition\ResolveInfo;
use League\Event\EventDispatcher;

use function base64_decode;
use function base64_encode;
use function count;

class ResolveCollectionFactory
{
    public function __construct(
        protected EntityManager $entityManager,
        protected Config $config,
        protected FieldResolver $fieldResolver,
        protected TypeManager $typeManager,
        protected EventDispatcher $eventDispatcher,
        protected Metadata $metadata,
    ) {
    }

    public function parseValue(ClassMetadata $metadata, string $field, mixed $value): mixed
    {
        /** @psalm-suppress UndefinedDocblockClass */
        $fieldMapping = $metadata->getFieldMapping($field);
        $graphQLType  = $this->typeManager->get($fieldMapping['type']);

        return $graphQLType->parseValue($graphQLType->serialize($value));
    }

    /** @param mixed[] $value */
    public function parseArrayValue(ClassMetadata $metadata, string $field, array $value): mixed
    {
        foreach ($value as $key => $val) {
            $value[$key] = $this->parseValue($metadata, $field, $val);
        }

        return $value;
    }

    public function get(Entity $entity): Closure
    {
        return function ($source, array $args, $context, ResolveInfo $info) {
            $fieldResolver = $this->fieldResolver;
            $collection    = $fieldResolver($source, $args, $context, $info);

            $collectionMetadata = $this->entityManager->getMetadataFactory()
                ->getMetadataFor(
                    (string) $this->entityManager->getMetadataFactory()
                        ->getMetadataFor(ClassUtils::getRealClass($source::class))
                        ->getAssociationTargetClass($info->fieldName),
                );

            $metadataConfig = $this->metadata->getMetadataConfig();
            $entityClass    = ClassUtils::getRealClass($source::class);

            return $this->buildPagination(
                $args['pagination'] ?? [],
                $collection,
                $this->buildCriteria($args['filter'] ?? [], $collectionMetadata),
                $metadataConfig[$entityClass]['fields'][$info->fieldName]['filterCriteriaEventName'],
                $source,
                $args,
                $context,
                $info,
            );
        };
    }

    /** @param mixed[] $filter */
    private function buildCriteria(array $filter, ClassMetadata $collectionMetadata): Criteria
    {
        $orderBy  = [];
        $criteria = Criteria::create();

        foreach ($filter as $field => $filters) {
            foreach ($filters as $filter => $value) {
                switch ($filter) {
                    case FiltersDef::IN:
                    case FiltersDef::NOTIN:
                        $value = $this->parseArrayValue($collectionMetadata, $field, $value);
                        $criteria->andWhere($criteria->expr()->$filter($field, $value));
                        break;
                    case FiltersDef::ISNULL:
                        $criteria->andWhere($criteria->expr()->$filter($field));
                        break;
                    case FiltersDef::BETWEEN:
                        $value = $this->parseArrayValue($collectionMetadata, $field, $value);

                        $criteria->andWhere($criteria->expr()->gte($field, $value['from']));
                        $criteria->andWhere($criteria->expr()->lte($field, $value['to']));
                        break;
                    case FiltersDef::SORT:
                        $orderBy[$field] = $value;
                        break;
                    default:
                        $value = $this->parseValue($collectionMetadata, $field, $value);
                        $criteria->andWhere($criteria->expr()->$filter($field, $value));
                        break;
                }
            }
        }

        if (! empty($orderBy)) {
            $criteria->orderBy($orderBy);
        }

        return $criteria;
    }

    /**
     * @param mixed[] $pagination
     *
     * @return mixed[]
     */
    private function buildPagination(
        array $pagination,
        PersistentCollection $collection,
        Criteria $criteria,
        string|null $filterCriteriaEventName,
        mixed ...$resolve,
    ): array {
        $paginationFields = [
            'first' => 0,
            'last' => 0,
            'after' => 0,
            'before' => 0,
        ];

        // Pagination
        foreach ($pagination as $field => $value) {
            switch ($field) {
                case 'after':
                    $paginationFields[$field] = (int) base64_decode($value, true) + 1;
                    break;
                case 'before':
                    $paginationFields[$field] = (int) base64_decode($value, true);
                    break;
                default:
                    $paginationFields[$field] = $value;
                    $first                    = $value;

                    break;
            }
        }

        $itemCount = count($collection->matching($criteria));

        $offsetAndLimit = $this->calculateOffsetAndLimit($paginationFields, $itemCount);
        if ($offsetAndLimit['offset']) {
            $criteria->setFirstResult($offsetAndLimit['offset']);
        }

        if ($offsetAndLimit['limit']) {
            $criteria->setMaxResults($offsetAndLimit['limit']);
        }

        /**
         * Fire the event dispatcher using the passed event name.
         */
        if ($filterCriteriaEventName) {
            $this->eventDispatcher->dispatch(
                new FilterCriteria(
                    $criteria,
                    $filterCriteriaEventName,
                    ...$resolve,
                ),
            );
        }

        // Fetch slice of collection
        $items = $collection->matching($criteria);

        $edges       = [];
        $index       = 0;
        $lastCursor  = base64_encode((string) 0);
        $firstCursor = null;
        foreach ($items as $item) {
            $cursor = base64_encode((string) ($index + $offsetAndLimit['offset']));

            $edges[] = [
                'node' => $item,
                'cursor' => $cursor,
            ];

            $lastCursor = $cursor;
            if (! $firstCursor) {
                $firstCursor = $cursor;
            }

            $index++;
        }

        $endCursor   = $itemCount ? $itemCount - 1 : 0;
        $startCursor = base64_encode((string) 0);
        $endCursor   = base64_encode((string) $endCursor);

        // Return entities
        return [
            'edges' => $edges,
            'totalCount' => $itemCount,
            'pageInfo' => [
                'endCursor' => $endCursor,
                'startCursor' => $startCursor,
                'hasNextPage' => $endCursor !== $lastCursor,
                'hasPreviousPage' => $firstCursor !== null && $startCursor !== $firstCursor,
            ],
        ];
    }

    /**
     * @param array<string, int> $paginationFields
     *
     * @return array<string, int>
     */
    protected function calculateOffsetAndLimit(array $paginationFields, int $itemCount): array
    {
        $offset = 0;

        $limit         = $this->config->getLimit();
        $adjustedLimit = $paginationFields['first'] ?: $paginationFields['last'] ?: $limit;

        if ($adjustedLimit < $limit) {
            $limit = $adjustedLimit;
        }

        if ($paginationFields['after']) {
            $offset = $paginationFields['after'];
        } elseif ($paginationFields['before']) {
            $offset = $paginationFields['before'] - $limit;
        }

        if ($offset < 0) {
            $limit += $offset;
            $offset = 0;
        }

        if ($paginationFields['last'] && ! $paginationFields['before']) {
            $offset = $itemCount - $paginationFields['last'];
        }

        return [
            'offset' => $offset,
            'limit'  => $limit,
        ];
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			namespace ApiSkeletons\Doctrine\GraphQL\Resolve;
6
7			use ApiSkeletons\Doctrine\GraphQL\Config;
8			use ApiSkeletons\Doctrine\GraphQL\Criteria\Filters as FiltersDef;
9			use ApiSkeletons\Doctrine\GraphQL\Event\FilterCriteria;
10			use ApiSkeletons\Doctrine\GraphQL\Metadata\Metadata;
11			use ApiSkeletons\Doctrine\GraphQL\Type\Entity;
12			use ApiSkeletons\Doctrine\GraphQL\Type\TypeManager;
13			use Closure;
14			use Doctrine\Common\Collections\Criteria;
15			use Doctrine\Common\Util\ClassUtils;
16			use Doctrine\ORM\EntityManager;
17			use Doctrine\ORM\Mapping\ClassMetadata;
18			use Doctrine\ORM\PersistentCollection;
19			use GraphQL\Type\Definition\ResolveInfo;
20			use League\Event\EventDispatcher;
21
22			use function base64_decode;
23			use function base64_encode;
24			use function count;
25
26			class ResolveCollectionFactory
27			{
28			public function __construct(
29			protected EntityManager $entityManager,
30			protected Config $config,
31			protected FieldResolver $fieldResolver,
32			protected TypeManager $typeManager,
33			protected EventDispatcher $eventDispatcher,
34			protected Metadata $metadata,
35			) {
36			}
37
38			public function parseValue(ClassMetadata $metadata, string $field, mixed $value): mixed
39			{
40			/** @psalm-suppress UndefinedDocblockClass */
41			$fieldMapping = $metadata->getFieldMapping($field);
42			$graphQLType = $this->typeManager->get($fieldMapping['type']);
43
44			return $graphQLType->parseValue($graphQLType->serialize($value));
45			}
46
47			/** @param mixed[] $value */
48			public function parseArrayValue(ClassMetadata $metadata, string $field, array $value): mixed
49			{
50			foreach ($value as $key => $val) {
51			$value[$key] = $this->parseValue($metadata, $field, $val);
52			}
53
54			return $value;
55			}
56
57			public function get(Entity $entity): Closure
58			{
59			return function ($source, array $args, $context, ResolveInfo $info) {
60			$fieldResolver = $this->fieldResolver;
61			$collection = $fieldResolver($source, $args, $context, $info);
62
63			$collectionMetadata = $this->entityManager->getMetadataFactory()
64			->getMetadataFor(
65			(string) $this->entityManager->getMetadataFactory()
66			->getMetadataFor(ClassUtils::getRealClass($source::class))
67			->getAssociationTargetClass($info->fieldName),
68			);
69
70			$metadataConfig = $this->metadata->getMetadataConfig();
71			$entityClass = ClassUtils::getRealClass($source::class);
72
73			return $this->buildPagination(
74			$args['pagination'] ?? [],
75			$collection,
76			$this->buildCriteria($args['filter'] ?? [], $collectionMetadata),
77			$metadataConfig[$entityClass]['fields'][$info->fieldName]['filterCriteriaEventName'],
78			$source,
79			$args,
80			$context,
81			$info,
82			);
83			};
84			}
85
86			/** @param mixed[] $filter */
87			private function buildCriteria(array $filter, ClassMetadata $collectionMetadata): Criteria
88			{
89			$orderBy = [];
90			$criteria = Criteria::create();
91
92			foreach ($filter as $field => $filters) {
93			foreach ($filters as $filter => $value) {
94			switch ($filter) {
95			case FiltersDef::IN:
96			case FiltersDef::NOTIN:
97			$value = $this->parseArrayValue($collectionMetadata, $field, $value);
98			$criteria->andWhere($criteria->expr()->$filter($field, $value));
99			break;
100			case FiltersDef::ISNULL:
101			$criteria->andWhere($criteria->expr()->$filter($field));
102			break;
103			case FiltersDef::BETWEEN:
104			$value = $this->parseArrayValue($collectionMetadata, $field, $value);
105
106			$criteria->andWhere($criteria->expr()->gte($field, $value['from']));
107			$criteria->andWhere($criteria->expr()->lte($field, $value['to']));
108			break;
109			case FiltersDef::SORT:
110			$orderBy[$field] = $value;
111			break;
112			default:
113			$value = $this->parseValue($collectionMetadata, $field, $value);
114			$criteria->andWhere($criteria->expr()->$filter($field, $value));
115			break;
116			}
117			}
118			}
119
120			if (! empty($orderBy)) {
121			$criteria->orderBy($orderBy);
122			}
123
124			return $criteria;
125			}
126
127			/**
128			* @param mixed[] $pagination
129			*
130			* @return mixed[]
131			*/
132			private function buildPagination(
133			array $pagination,
134			PersistentCollection $collection,
135			Criteria $criteria,
136			string\|null $filterCriteriaEventName,
137			mixed ...$resolve,
138			): array {
139			$paginationFields = [
140			'first' => 0,
141			'last' => 0,
142			'after' => 0,
143			'before' => 0,
144			];
145
146			// Pagination
147			foreach ($pagination as $field => $value) {
148			switch ($field) {
149			case 'after':
150			$paginationFields[$field] = (int) base64_decode($value, true) + 1;
151			break;
152			case 'before':
153			$paginationFields[$field] = (int) base64_decode($value, true);
154			break;
155			default:
156			$paginationFields[$field] = $value;
157			$first = $value;
			0 ignored issues – show Unused Code introduced 2023-02-01 21:23 UTC by Report Bug Copy Issue Report The assignment to `$first` is dead and can be removed. Loading history...
158			break;
159			}
160			}
161
162			$itemCount = count($collection->matching($criteria));
163
164			$offsetAndLimit = $this->calculateOffsetAndLimit($paginationFields, $itemCount);
165			if ($offsetAndLimit['offset']) {
166			$criteria->setFirstResult($offsetAndLimit['offset']);
167			}
168
169			if ($offsetAndLimit['limit']) {
170			$criteria->setMaxResults($offsetAndLimit['limit']);
171			}
172
173			/**
174			* Fire the event dispatcher using the passed event name.
175			*/
176			if ($filterCriteriaEventName) {
177			$this->eventDispatcher->dispatch(
178			new FilterCriteria(
179			$criteria,
180			$filterCriteriaEventName,
181			...$resolve,
182			),
183			);
184			}
185
186			// Fetch slice of collection
187			$items = $collection->matching($criteria);
188
189			$edges = [];
190			$index = 0;
191			$lastCursor = base64_encode((string) 0);
192			$firstCursor = null;
193			foreach ($items as $item) {
194			$cursor = base64_encode((string) ($index + $offsetAndLimit['offset']));
195
196			$edges[] = [
197			'node' => $item,
198			'cursor' => $cursor,
199			];
200
201			$lastCursor = $cursor;
202			if (! $firstCursor) {
203			$firstCursor = $cursor;
204			}
205
206			$index++;
207			}
208
209			$endCursor = $itemCount ? $itemCount - 1 : 0;
210			$startCursor = base64_encode((string) 0);
211			$endCursor = base64_encode((string) $endCursor);
212
213			// Return entities
214			return [
215			'edges' => $edges,
216			'totalCount' => $itemCount,
217			'pageInfo' => [
218			'endCursor' => $endCursor,
219			'startCursor' => $startCursor,
220			'hasNextPage' => $endCursor !== $lastCursor,
221			'hasPreviousPage' => $firstCursor !== null && $startCursor !== $firstCursor,
222			],
223			];
224			}
225
226			/**
227			* @param array<string, int> $paginationFields
228			*
229			* @return array<string, int>
230			*/
231			protected function calculateOffsetAndLimit(array $paginationFields, int $itemCount): array
232			{
233			$offset = 0;
234
235			$limit = $this->config->getLimit();
236			$adjustedLimit = $paginationFields['first'] ?: $paginationFields['last'] ?: $limit;
237
238			if ($adjustedLimit < $limit) {
239			$limit = $adjustedLimit;
240			}
241
242			if ($paginationFields['after']) {
243			$offset = $paginationFields['after'];
244			} elseif ($paginationFields['before']) {
245			$offset = $paginationFields['before'] - $limit;
246			}
247
248			if ($offset < 0) {
249			$limit += $offset;
250			$offset = 0;
251			}
252
253			if ($paginationFields['last'] && ! $paginationFields['before']) {
254			$offset = $itemCount - $paginationFields['last'];
255			}
256
257			return [
258			'offset' => $offset,
259			'limit' => $limit,
260			];
261			}
262			}
263

API-Skeletons / doctrine-graphql

Pull Request — main (#126)

ResolveCollectionFactory::buildPagination() D

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

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