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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\ChargeInterface; |
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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 Merger implements MergerInterface |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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public function mergeBills(array $bills): array |
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{ |
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$res = []; |
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foreach ($bills as $bill) { |
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$uid = $bill->getUniqueString(); |
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if (empty($res[$uid])) { |
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$res[$uid] = $bill; |
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} else { |
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$res[$uid] = $this->mergeBill($res[$uid], $bill); |
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} |
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} |
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return $res; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function mergeBill(BillInterface $first, BillInterface $other): BillInterface |
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{ |
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$charges = $this->mergeCharges(array_merge($first->getCharges(), $other->getCharges())); |
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return new Bill( |
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$this->mergeId($first, $other), |
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$first->getType(), |
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$first->getTime(), |
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$this->mergeSum($first, $other, $charges), |
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$this->mergeQuantity($first, $other, $charges), |
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$first->getCustomer(), |
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$first->getTarget(), |
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$first->getPlan(), |
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$charges |
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); |
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} |
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/** |
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* Merge |
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* @param ChargeInterface[] $charges |
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* @return ChargeInterface[] |
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*/ |
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protected function mergeCharges(array $charges): array |
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{ |
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$res = []; |
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foreach ($charges as $charge) { |
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$uid = $charge->getUniqueString(); |
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if (empty($res[$uid])) { |
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$res[$uid] = $charge; |
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} else { |
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$res[$uid] = $this->mergeCharge($res[$uid], $charge); |
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} |
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} |
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//var_dump(array_keys($res));die; |
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return $res; |
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} |
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/** |
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* Merges two charges. |
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* Simple implementation just returns latest charge. |
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* @param ChargeInterface $first |
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* @param ChargeInterface $other |
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* @return ChargeInterface |
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*/ |
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protected function mergeCharge(ChargeInterface $first, ChargeInterface $other): ChargeInterface |
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{ |
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if (!$first->hasId()) { |
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$first->setId($other->getId()); |
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} |
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return $first; |
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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 mergeId(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 merge 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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* @param ChargeInterface[] $charges |
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* @return Money |
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*/ |
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protected function mergeSum(BillInterface $first, BillInterface $other, array $charges): Money |
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{ |
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$sum = array_shift($charges)->getSum(); |
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foreach ($charges as $charge) { |
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$sum = $sum->add($charge->getSum()); |
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} |
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return $sum->negative(); |
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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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* @param ChargeInterface[] $charges |
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* @return QuantityInterface |
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*/ |
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protected function mergeQuantity(BillInterface $first, BillInterface $other, array $charges): QuantityInterface |
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{ |
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$usage = array_shift($charges)->getUsage(); |
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foreach ($charges as $charge) { |
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$usage = $usage->add($charge->getUsage()); |
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} |
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return $usage; |
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} |
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} |
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hiqdev /
php-billing
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