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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\charge\modifiers; |
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use hiqdev\php\billing\action\ActionInterface; |
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use hiqdev\php\billing\charge\Charge; |
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use hiqdev\php\billing\charge\ChargeInterface; |
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use hiqdev\php\billing\charge\modifiers\addons\Discount; |
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use hiqdev\php\billing\price\SinglePrice; |
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use hiqdev\php\billing\target\Target; |
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use hiqdev\php\billing\type\Type; |
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use hiqdev\php\units\Quantity; |
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use Money\Money; |
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/** |
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* Fixed discount. |
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* |
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* @author Andrii Vasyliev <[email protected]> |
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*/ |
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class FixedDiscount extends Modifier |
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{ |
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const VALUE = 'value'; |
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public function __construct($value, array $addons = []) |
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{ |
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parent::__construct($addons); |
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$this->addAddon(self::VALUE, new Discount($value)); |
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} |
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public function getNext() |
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{ |
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return $this; |
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} |
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public function getValue(ChargeInterface $charge = null): Discount |
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{ |
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return $this->getAddon(self::VALUE); |
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} |
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public function isAbsolute() |
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{ |
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return $this->getAddon(self::VALUE)->isAbsolute(); |
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} |
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public function isRelative() |
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{ |
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return !$this->isAbsolute(); |
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} |
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public function calculateSum(ChargeInterface $charge = null): Money |
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{ |
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return $this->getValue($charge)->calculateSum($charge); |
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} |
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public function buildPrice(Money $sum) |
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{ |
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$type = $this->getType(); |
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$target = $this->getTarget(); |
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$prepaid = Quantity::items(0); |
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return new SinglePrice(null, $type, $target, null, $prepaid, $sum); |
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} |
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public function getType() |
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{ |
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return new Type(Type::ANY, 'discount'); |
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} |
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public function getTarget() |
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{ |
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return new Target(Target::ANY, Target::ANY); |
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} |
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public function modifyCharge(?ChargeInterface $charge, ActionInterface $action): array |
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{ |
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if ($charge === null) { |
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return []; |
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} |
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$month = $action->getTime()->modify('first day of this month midnight'); |
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if (!$this->checkPeriod($month)) { |
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return [$charge]; |
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} |
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$sum = $this->calculateSum($charge); |
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$usage = Quantity::items(1); |
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$price = $this->buildPrice($sum); |
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$discount = new Charge(null, $action, $price, $usage, $sum->multiply(-1)); |
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$reason = $this->getReason(); |
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if ($reason) { |
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$discount->setComment($reason->getValue()); |
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} |
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return [$charge, $discount]; |
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} |
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} |
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hiqdev /
php-billing
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Let?s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let?s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: