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<?php declare(strict_types=1); |
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namespace Neomerx\JsonApi\Representation; |
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/** |
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* Copyright 2015-2019 [email protected] |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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use Neomerx\JsonApi\Contracts\Parser\PositionInterface; |
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use Neomerx\JsonApi\Contracts\Parser\ResourceInterface; |
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use Neomerx\JsonApi\Contracts\Representation\FieldSetFilterInterface; |
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/** |
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* @package Neomerx\JsonApi |
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*/ |
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class FieldSetFilter implements FieldSetFilterInterface |
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{ |
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/** |
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* @var array |
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*/ |
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private $fieldSets; |
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/** |
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* @param array|null $fieldSets |
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*/ |
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public function __construct(array $fieldSets) |
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{ |
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$this->fieldSets = []; |
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foreach ($fieldSets as $type => $fields) { |
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assert(is_string($type) === true && empty($type) === false); |
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assert(is_iterable($fields) === true); |
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$this->fieldSets[$type] = []; |
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foreach ($fields as $field) { |
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assert(is_string($field) === true && empty($field) === false); |
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assert(isset($this->fieldSets[$type][$field]) === false); |
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$this->fieldSets[$type][$field] = true; |
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} |
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} |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getAttributes(ResourceInterface $resource): iterable |
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{ |
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yield from $this->filterFields($resource->getType(), $resource->getAttributes()); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getRelationships(ResourceInterface $resource): iterable |
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{ |
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yield from $this->filterFields($resource->getType(), $resource->getRelationships()); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function shouldOutputRelationship(PositionInterface $position): bool |
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{ |
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$parentType = $position->getParentType(); |
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if ($this->hasFilter($parentType) === true) { |
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return array_key_exists($position->getParentRelationship(), $this->getAllowedFields($parentType)); |
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} |
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return true; |
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} |
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/** |
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* @return array |
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*/ |
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protected function getFieldSets(): array |
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{ |
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return $this->fieldSets; |
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} |
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/** |
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* @param string $type |
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* |
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* @return bool |
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*/ |
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protected function hasFilter(string $type): bool |
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{ |
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return array_key_exists($type, $this->fieldSets) === true; |
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} |
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/** |
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* @param string $type |
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* |
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* @return array |
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*/ |
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protected function getAllowedFields(string $type): array |
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{ |
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assert($this->hasFilter($type) === true); |
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return $this->getFieldSets()[$type]; |
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} |
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/** |
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* @param string $type |
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* @param iterable $fields |
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* |
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* @return iterable |
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*/ |
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protected function filterFields(string $type, iterable $fields): iterable |
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{ |
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if ($this->hasFilter($type) === false) { |
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yield from $fields; |
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return; |
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} |
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$allowedFields = $this->getAllowedFields($type); |
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foreach ($fields as $name => $value) { |
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if (array_key_exists($name, $allowedFields) === true) { |
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yield $name => $value; |
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} |
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} |
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} |
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} |
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