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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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use WMDE\BannerServer\Entity\Visitor; |
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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 $impressionThreshold; |
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private $rng; |
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/** |
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* @var Campaign |
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*/ |
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private $currentCampaign; |
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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 $visitor ): BannerSelectionData { |
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$remainingCampaigns = $this->campaignCollection->filter( |
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function ( Campaign $campaign ) use ( $visitor ): bool { |
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return ( |
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$campaign->isInActiveDateRange( new \DateTime() ) && |
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$campaign->isInDisplayRange( $visitor->getDisplayWidth() ) && |
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!$this->impressionThreshold->isThresholdReached( $visitor->getTotalImpressionCount() ) && |
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!$visitor->inCategory( $campaign->getCategory() ) && |
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!$this->isRatioLimited( $campaign->getDisplayPercentage() ) |
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); |
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} |
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); |
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if ( $remainingCampaigns->isEmpty() ) { |
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return new EmptyBannerSelectionData( $visitor ); |
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} |
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$selectedCampaign = $remainingCampaigns->getFirstCampaign(); |
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$visitorBucket = $selectedCampaign->selectBucket( |
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$visitor->getBucketIdentifier() |
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); |
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return new ActiveBannerSelectionData( |
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new Visitor( |
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$visitor->getTotalImpressionCount() + 1, |
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$visitorBucket->getIdentifier(), |
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$visitor->getDisplayWidth(), |
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...$visitor->getCategories() |
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), |
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$visitorBucket->getBanner( $visitor->getTotalImpressionCount() ), |
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$selectedCampaign->getEnd() |
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); |
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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
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