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<?php |
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namespace FinanCalc\Calculators { |
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use FinanCalc\Interfaces\Calculator\CalculatorAbstract; |
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use FinanCalc\Utils\Lambdas; |
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use FinanCalc\Utils\MathFuncs; |
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use FinanCalc\Utils\Time\TimeSpan; |
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/** |
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* Class SimpleDiscountCalculator |
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* @package FinanCalc\Calculators |
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*/ |
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class SimpleDiscountCalculator extends CalculatorAbstract |
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{ |
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// amount due = 'S' |
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protected $amountDue; |
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// annual discount rate = 'd' |
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protected $annualDiscountRate; |
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// the time, which converted to years = 't' |
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/** @var TimeSpan */ |
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protected $time; |
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/** |
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* @param $amountDue |
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* @param $annualDiscountRate |
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* @param TimeSpan $time |
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*/ |
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public function __construct( |
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$amountDue, |
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$annualDiscountRate, |
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TimeSpan $time |
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) { |
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$this->setAmountDue($amountDue); |
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$this->setAnnualDiscountRate($annualDiscountRate); |
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$this->setTime($time); |
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} |
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/** |
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* @param $amountDue |
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*/ |
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public function setAmountDue($amountDue) |
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{ |
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$this->setProperty("amountDue", $amountDue, Lambdas::checkIfPositive()); |
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} |
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/** |
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* @param $annualDiscountRate |
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*/ |
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public function setAnnualDiscountRate($annualDiscountRate) |
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{ |
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$this->setProperty("annualDiscountRate", $annualDiscountRate, Lambdas::checkIfPositive()); |
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} |
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/** |
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* @param TimeSpan $time |
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*/ |
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public function setTime(TimeSpan $time) |
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{ |
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$this->setProperty("time", $time, Lambdas::checkIfPositive()); |
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} |
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/** |
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* @return string |
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*/ |
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public function getAmountDue() |
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{ |
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return $this->amountDue; |
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} |
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/** |
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* @return string |
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*/ |
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public function getAnnualDiscountRate() |
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{ |
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return $this->annualDiscountRate; |
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} |
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/** |
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* @return TimeSpan |
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*/ |
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public function getTime() |
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{ |
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return $this->time; |
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} |
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/** |
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* @return string |
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*/ |
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public function getTimeInYears() |
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{ |
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return $this->time->toYears(); |
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} |
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/** |
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* @return string |
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*/ |
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public function getTimeInMonths() |
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{ |
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return $this->time->toMonths(); |
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} |
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/** |
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* @return string |
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*/ |
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public function getTimeInDays() |
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{ |
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return $this->time->toDays(); |
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} |
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/** |
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* @return string |
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*/ |
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public function getDiscountAmount() |
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{ |
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// D = S*d*t |
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return MathFuncs::mul( |
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$this->amountDue, |
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MathFuncs::mul( |
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$this->annualDiscountRate, |
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$this->getTimeInYears() |
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) |
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); |
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} |
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} |
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} |
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|
uruba /
FinanCalc
