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<?php |
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declare( strict_types = 1 ); |
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namespace WMDE\BannerServer\UseCase\BannerSelection; |
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use WMDE\BannerServer\Entity\BannerSelection\Campaign; |
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use WMDE\BannerServer\Entity\BannerSelection\CampaignCollection; |
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use WMDE\BannerServer\Entity\BannerSelection\ImpressionThreshold; |
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use WMDE\BannerServer\Entity\BannerSelection\RandomIntegerGenerator; |
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/** |
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* @license GNU GPL v2+ |
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*/ |
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class BannerSelectionUseCase { |
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private $campaignCollection; |
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private $currentCampaign; |
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private $impressionThreshold; |
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private $rng; |
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public function __construct( CampaignCollection $campaignCollection, ImpressionThreshold $impressionThreshold, RandomIntegerGenerator $rng ) { |
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$this->campaignCollection = $campaignCollection; |
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$this->impressionThreshold = $impressionThreshold; |
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$this->rng = $rng; |
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} |
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public function selectBanner( Visitor $visitor ): BannerSelectionData { |
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if ( $visitor->hasDonated() || |
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$this->getCurrentCampaign() === null || |
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$this->impressionThreshold->isThresholdReached( $visitor->getTotalImpressionCount() ) || |
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$this->isRatioLimited( $this->getCurrentCampaign()->getDisplayPercentage() ) ) { |
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return new EmptyBannerSelectionData( $visitor ); |
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} |
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$visitorBucket = $this->getCurrentCampaign()->selectBucket( |
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$visitor->getBucketIdentifier() |
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); |
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return new ActiveBannerSelectionData( |
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new Visitor( 1, $visitorBucket->getIdentifier(), false ), |
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$visitorBucket->getBanner( $visitor->getTotalImpressionCount() ), |
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$this->getCurrentCampaign()->getEnd() |
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); |
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} |
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private function getCurrentCampaign(): ?Campaign { |
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if ( $this->currentCampaign === null ) { |
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$this->currentCampaign = $this->campaignCollection->getCampaign( new \DateTime() ); |
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} |
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return $this->currentCampaign; |
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} |
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private function isRatioLimited( int $campaignDisplayPercent ): bool { |
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return $this->rng->getRandomInteger( 1, 100 ) > $campaignDisplayPercent; |
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} |
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} |
wmde /
banner-server
