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<?php |
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declare(strict_types=1); |
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namespace hiqdev\php\billing\price; |
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use hiqdev\php\billing\plan\PlanInterface; |
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use hiqdev\php\billing\target\TargetInterface; |
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use hiqdev\php\billing\type\TypeInterface; |
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use hiqdev\php\units\Quantity; |
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use hiqdev\php\units\QuantityInterface; |
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use Money\Currency; |
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use Money\Money; |
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class ProgressivePrice extends SinglePrice |
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{ |
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protected ProgressivePriceThresholds $thresholds; |
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public function __construct( |
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$id, |
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TypeInterface $type, |
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TargetInterface $target, |
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QuantityInterface $prepaid, |
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Money $price, |
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array $thresholds, |
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?PlanInterface $plan = null |
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) { |
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parent::__construct($id, $type, $target, $plan, $prepaid, $price); |
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$this->thresholds = new ProgressivePriceThresholds($thresholds); |
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} |
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/** |
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* @return ProgressivePriceThresholds |
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*/ |
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public function getThresholds(): array |
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{ |
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return $this->thresholds; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function calculateUsage(QuantityInterface $quantity): ?QuantityInterface |
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{ |
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$usage = $quantity->convert($this->prepaid->getUnit()); |
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if ($usage->isPositive()) { |
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return $usage; |
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} |
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return Quantity::create($this->prepaid->getUnit()->getName(), $quantity->getQuantity()); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function calculatePrice(QuantityInterface $quantity): Money |
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{ |
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$result = new Money(0, $this->price->getCurrency()); |
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$usage = $this->calculateUsage($quantity); |
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$thresholds = $this->thresholds->get(); |
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$usageCur = null; |
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foreach ($thresholds as $key => $threshold) { |
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if (is_null($usageCur)) { |
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$usageCur = PriceHelper::buildQuantityByMoneyPrice( |
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$threshold->getBasePrice(), |
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$usage->getUnit()->getName(), |
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(string)$usage->getQuantity() |
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); |
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} |
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if ($threshold->quantity()->compare($usageCur) < 0) { |
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if ($key !== count($thresholds) - 1) { |
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$boundary = $usageCur->subtract($threshold->quantity()); |
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$result = $result->add(new Money( |
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$boundary->multiply($threshold->price()->getAmount())->getQuantity(), |
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$threshold->price()->getCurrency() |
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) |
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); |
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$usageCur = $usageCur->subtract($boundary); |
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} else { |
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$result = $result->add(new Money( |
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(int) $usage->multiply($threshold->price()->getAmount())->getQuantity(), |
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$threshold->price()->getCurrency() |
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) |
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); |
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} |
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} |
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} |
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return $result; |
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} |
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public function calculateSum(QuantityInterface $quantity): ?Money |
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{ |
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return $this->calculatePrice($quantity); |
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} |
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} |
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hiqdev /
php-billing
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