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<?php
namespace Bitrix\Crm;
class Discount
{
const UNDEFINED = 0;
const MONETARY = 1;
const PERCENTAGE = 2;
const MONETARY_NAME = 'MONETARY';
const PERCENTAGE_NAME = 'PERCENTAGE';
public static function isDefined($typeID)
{
if(!is_numeric($typeID))
{
return false;
}
$typeID = intval($typeID);
return $typeID >= self::MONETARY && $typeID <= self::PERCENTAGE;
}
public static function resolveName($typeID)
{
if(!is_numeric($typeID))
{
return '';
}
$typeID = intval($typeID);
if($typeID <= 0)
{
return '';
}
switch($typeID)
{
case self::MONETARY:
return self::MONETARY_NAME;
case self::PERCENTAGE:
return self::PERCENTAGE_NAME;
case self::UNDEFINED:
default:
return '';
}
}
public static function calculateDiscountRate($originalPrice, $price)
{
$originalPrice = round(doubleval($originalPrice), 2);
$price = round(doubleval($price), 2);
if($originalPrice === 0.0)
{
return 0.0;
}
if($price === 0.0)
{
return $originalPrice > 0 ? 100.0 : -100.0;
}
return round(((100 * ($originalPrice - $price)) / $originalPrice), 2);
}
public static function calculateDiscountSum($price, $discountRate)
{
return (self::calculateOriginalPrice($price, $discountRate) - doubleval($price));
}
public static function calculateDiscountByDiscountPrice($discountPrice, $discountRate)
{
return (100 * $discountPrice / (100 - $discountRate) - $discountPrice);
}
public static function calculateOriginalPrice($price, $discountRate)
{
$price = doubleval($price);
$discountRate = doubleval($discountRate);
return (100 * $price) / (100 - $discountRate);
}
public static function calculatePrice($originalPrice, $discountRate)
{
$originalPrice = doubleval($originalPrice);
$discountRate = doubleval($discountRate);
return $originalPrice - (($originalPrice * $discountRate) / 100);
}
}