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<?php |
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/** |
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* PHP Billing Library |
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* |
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* @link https://github.com/hiqdev/php-billing |
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* @package php-billing |
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* @license BSD-3-Clause |
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* @copyright Copyright (c) 2017-2018, HiQDev (http://hiqdev.com/) |
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*/ |
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namespace hiqdev\php\billing\tools; |
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use hiqdev\php\billing\bill\Bill; |
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use hiqdev\php\billing\bill\BillInterface; |
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use hiqdev\php\billing\charge\AggregationException; |
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use hiqdev\php\billing\charge\ChargeInterface; |
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use hiqdev\php\billing\charge\GeneralizerInterface; |
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use hiqdev\php\units\QuantityInterface; |
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use Money\Money; |
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/** |
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* @author Andrii Vasyliev <[email protected]> |
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*/ |
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class Aggregator implements AggregatorInterface |
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{ |
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/** |
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* @var GeneralizerInterface |
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*/ |
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protected $generalizer; |
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public function __construct(GeneralizerInterface $generalizer) |
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{ |
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$this->generalizer = $generalizer; |
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} |
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/** |
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* Aggregates given Charges to Bills. Then aggregates them again with DB. |
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* @param ChargeInterface[]|ChargeInterface[][] $charges |
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* @return BillInterface[] |
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*/ |
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public function aggregateCharges(array $charges): array |
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{ |
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$bills = []; |
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foreach ($charges as $charge) { |
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if (is_array($charge)) { |
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$others = $this->aggregateCharges($charge); |
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} elseif ($charge instanceof ChargeInterface) { |
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$others = [$this->generalizer->createBill($charge)]; |
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} else { |
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throw new AggregationException('Not a Charge given to Aggregator'); |
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} |
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$bills = $this->aggregateBills($bills, $others); |
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} |
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return $bills; |
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} |
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/** |
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* Aggregate arrays of bills. |
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* @param BillInterface[] $bills |
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* @param BillInterface[] $others |
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* @return BillInterface[] |
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*/ |
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protected function aggregateBills(array $bills, array $others): array |
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{ |
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foreach ($others as $bill) { |
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$uid = $bill->getUniqueString(); |
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if (empty($bills[$uid])) { |
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$bills[$uid] = $bill; |
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} else { |
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$bills[$uid] = $this->aggregateBill($bills[$uid], $bill); |
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} |
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} |
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return $bills; |
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} |
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/** |
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* @param BillInterface $first |
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* @param BillInterface $other |
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* @return BillInterface |
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*/ |
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protected function aggregateBill(BillInterface $first, BillInterface $other): BillInterface |
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{ |
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return new Bill( |
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$this->aggregateId($first, $other), |
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$first->getType(), |
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$first->getTime(), |
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$this->aggregateSum($first, $other), |
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$this->aggregateQuantity($first, $other), |
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$first->getCustomer(), |
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$first->getTarget(), |
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$first->getPlan(), |
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array_merge($first->getCharges(), $other->getCharges()) |
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); |
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} |
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/** |
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* @param BillInterface $first |
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* @param BillInterface $other |
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* @return string|int|null |
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*/ |
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protected function aggregateId(BillInterface $first, BillInterface $other) |
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{ |
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if ($first->getId() === null) { |
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return $other->getId(); |
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} |
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if ($other->getId() === null) { |
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return $first->getId(); |
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} |
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if ($first->getId() === $other->getId()) { |
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return $other->getId(); |
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} |
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throw new AggregationException('cannot aggregate bills with different IDs'); |
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} |
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/** |
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* @param BillInterface $first |
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* @param BillInterface $other |
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* @return Money |
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*/ |
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protected function aggregateSum(BillInterface $first, BillInterface $other): Money |
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{ |
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return $first->getSum()->add($other->getSum()); |
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} |
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/** |
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* @param BillInterface $first |
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* @param BillInterface $other |
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* @return QuantityInterface |
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*/ |
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protected function aggregateQuantity(BillInterface $first, BillInterface $other): QuantityInterface |
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{ |
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if ($first->getQuantity()->isConvertible($other->getQuantity()->getUnit())) { |
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return $first->getQuantity()->add($other->getQuantity()); |
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} |
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return $first->getQuantity(); |
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} |
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} |
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hiqdev /
php-billing
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