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<?php namespace Neomerx\JsonApi\Http\Headers; |
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/** |
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* Copyright 2015-2018 [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 Closure; |
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use InvalidArgumentException; |
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use Neomerx\JsonApi\Contracts\Http\Headers\AcceptMediaTypeInterface; |
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/** |
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* @package Neomerx\JsonApi |
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*/ |
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class AcceptMediaType extends MediaType implements AcceptMediaTypeInterface |
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{ |
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/** |
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* @var float [0..1] |
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*/ |
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private $quality; |
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/** |
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* @var int |
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*/ |
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private $position; |
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/** |
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* @param int $position |
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* @param string $type |
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* @param string $subType |
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* @param array<string,string>|null $parameters |
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* @param float $quality |
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*/ |
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public function __construct( |
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int $position, |
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string $type, |
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string $subType, |
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array $parameters = null, |
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float $quality = 1.0 |
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) { |
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parent::__construct($type, $subType, $parameters); |
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if ($position < 0) { |
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throw new InvalidArgumentException('position'); |
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} |
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if ($quality < 0 || $quality > 1) { |
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throw new InvalidArgumentException('quality'); |
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} |
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// rfc2616: 3 digits are meaningful (#3.9 Quality Values) |
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$quality = floor($quality * 1000) / 1000; |
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$this->position = $position; |
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$this->quality = $quality; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getPosition(): int |
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{ |
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return $this->position; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getQuality(): float |
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{ |
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return $this->quality; |
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} |
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/** |
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* @return Closure |
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*/ |
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public static function getCompare(): Closure |
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{ |
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return function (AcceptMediaTypeInterface $lhs, AcceptMediaTypeInterface $rhs) { |
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$qualityCompare = self::compareQuality($lhs->getQuality(), $rhs->getQuality()); |
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if ($qualityCompare !== 0) { |
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return $qualityCompare; |
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} |
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$typeCompare = self::compareStrings($lhs->getType(), $rhs->getType()); |
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if ($typeCompare !== 0) { |
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return $typeCompare; |
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} |
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$subTypeCompare = self::compareStrings($lhs->getSubType(), $rhs->getSubType()); |
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if ($subTypeCompare !== 0) { |
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return $subTypeCompare; |
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} |
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$parametersCompare = self::compareParameters($lhs->getParameters(), $rhs->getParameters()); |
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if ($parametersCompare !== 0) { |
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return $parametersCompare; |
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} |
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return ($lhs->getPosition() - $rhs->getPosition()); |
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}; |
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} |
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/** |
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* @param float $lhs |
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* @param float $rhs |
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* |
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* @return int |
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* |
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* @SuppressWarnings(PHPMD.ElseExpression) |
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*/ |
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private static function compareQuality(float $lhs, float $rhs): int |
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{ |
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$qualityDiff = $lhs - $rhs; |
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// rfc2616: 3 digits are meaningful (#3.9 Quality Values) |
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if (abs($qualityDiff) < 0.001) { |
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return 0; |
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} else { |
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return $lhs > $rhs ? -1 : 1; |
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} |
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} |
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/** |
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* @param string $lhs |
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* @param string $rhs |
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* |
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* @return int |
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*/ |
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private static function compareStrings(string $lhs, string $rhs): int |
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{ |
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return ($rhs !== '*' ? 1 : 0) - ($lhs !== '*' ? 1 : 0); |
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} |
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/** |
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* @param array|null $lhs |
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* @param array|null $rhs |
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* |
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* @return int |
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*/ |
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private static function compareParameters(?array $lhs, ?array $rhs): int |
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{ |
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return (empty($lhs) !== false ? 1 : 0) - (empty($rhs) !== false ? 1 : 0); |
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} |
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} |
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