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<?php |
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/* |
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* This file is part of the Sylius package. |
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* |
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* (c) Paweł Jędrzejewski |
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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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namespace Sylius\Component\Promotion\Generator; |
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use Sylius\Component\Promotion\Repository\CouponRepositoryInterface; |
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use Webmozart\Assert\Assert; |
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/** |
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* @author Arkadiusz Krakowiak <[email protected]> |
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*/ |
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final class PercentageGenerationPolicy implements GenerationPolicyInterface |
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{ |
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/** |
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* @var CouponRepositoryInterface |
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*/ |
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private $couponRepository; |
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/** |
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* @var float |
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*/ |
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private $ratio; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function __construct(CouponRepositoryInterface $couponRepository, $ratio = 0.5) |
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{ |
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$this->couponRepository = $couponRepository; |
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$this->ratio = $ratio; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function isGenerationPossible(InstructionInterface $instruction) |
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{ |
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$expectedGenerationAmount = $instruction->getAmount(); |
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$possibleGenerationAmount = $this->calculatePossibleGenerationAmount($instruction); |
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return $possibleGenerationAmount >= $expectedGenerationAmount; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getPossibleGenerationAmount(InstructionInterface $instruction) |
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{ |
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return $this->calculatePossibleGenerationAmount($instruction); |
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} |
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/** |
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* @param InstructionInterface $instruction |
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* |
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* @return int |
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*/ |
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private function calculatePossibleGenerationAmount(InstructionInterface $instruction) |
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{ |
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$expectedAmount = $instruction->getAmount(); |
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$expectedCodeLength = $instruction->getCodeLength(); |
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Assert::allNotNull( |
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[$expectedAmount, $expectedCodeLength], |
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'Code length or amount cannot be null.' |
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); |
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$generatedAmount = $this->couponRepository->countCouponsByCodeLength($expectedCodeLength); |
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return floor(pow(16, $expectedCodeLength) * $this->ratio - $generatedAmount); |
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} |
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} |
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Sylius /
Sylius
