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<?php |
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/** |
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* This file is part of Lenius Basket, a PHP package to handle |
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* your shopping basket. |
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* |
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* Copyright (c) 2017 Lenius. |
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* https://github.com/lenius/basket |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* @author Carsten Jonstrup<[email protected]> |
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* @copyright 2017 Lenius. |
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* |
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* @version production |
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* |
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* @link https://github.com/lenius/basket |
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*/ |
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namespace Lenius\Basket; |
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/** |
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* Class Tax. |
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*/ |
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class Tax |
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{ |
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protected $percentage; |
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protected $deductModifier; |
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protected $addModifier; |
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/** |
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* When constructing the tax class, you can either |
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* pass in a percentage, or a price before and after |
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* tax and have the library work out the tax rate |
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* automatically. |
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* |
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* @param float $value The percentage of your tax (or price before tax) |
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* @param float $after The value after tax |
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*/ |
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public function __construct($value, $after = null) |
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{ |
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$this->percentage = $value; |
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if (is_numeric($after)) { |
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$this->percentage = (($after - $value) / $value) * 100; |
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} |
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$this->deductModifier = 1 - ($this->percentage / 100); |
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$this->addModifier = 1 + ($this->percentage / 100); |
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} |
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/** |
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* Deduct tax from a specified price. |
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* |
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* @param float $price The price you want to deduct tax from |
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* |
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* @return float $price - tax |
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*/ |
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public function deduct($price) |
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{ |
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return $price * $this->deductModifier; |
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} |
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/** |
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* Add tax to a specified price. |
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* |
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* @param float $price The value you want to add tax to |
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* |
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* @return float $price + tax |
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*/ |
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public function add($price) |
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{ |
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return $price * $this->addModifier; |
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} |
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/** |
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* Calculate the tax rate from a price. |
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* |
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* @param float $price The price (after tax) |
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* |
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* @return float The tax rate |
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*/ |
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public function rate($price) |
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{ |
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return $price - $this->deduct($price); |
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} |
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/** |
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* Return the value of protected properties. |
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* |
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* @param mixed $property The property |
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* |
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* @return mixed The value of the property |
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*/ |
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public function __get($property) |
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{ |
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return $this->$property; |
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} |
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} |
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Lenius /
basket
