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<?php
namespace Ipolh\SDEK\Core\Entity;
/**
* Class Money
* @package Ipolh\SDEK\Core
* @subpackage Entity
*/
class Money
{
/**
* @var int inner container for precise storing money amount. Uses minimal unit (cent, kopeyka etc)
*/
protected $amount;
/**
* @var string - ISO-4217 currency code
*/
protected $currency;
/**
* @var int number of decimal places for this currency (2 for RUB, for instance: 145.50 RUB - 50 - 2 decimal places)
*/
protected static $decimal; //basically its 2, but for rare currencies with other rules you can extend this class and change it
/**
* Money constructor.
* @param float $amount
* @param string $currency
*/
public function __construct($amount,$currency = 'RUB')
{
self::$decimal = 2;
$this->setAmount($amount);
$this->currency = $currency;
}
/**
* Do not use this function!
* It's public only for inner reasons.
* For calculations use static functions of this class
* To get money amount use getAmount function
* @return int
*/
private function getPreciseInnerAmount()
{
return $this->amount;
}
/**
* @param int $addSum
* @return $this
*/
private function increasePreciseInnerAmount($addSum)
{
$this->amount += $addSum;
return $this;
}
/**
* @param int $multiplier
* @return $this
*/
public function multiplyAmount($multiplier)
{
$this->amount *= $multiplier;
return $this;
}
/**
* @param float $amount
* @return Money
*/
public function setAmount($amount)
{
$preRoundFloatPrecision = (ini_get('precision') > 0) ? floor(ini_get('precision') / 2) : 7;
$strAmount = number_format($amount, $preRoundFloatPrecision, '.', '');
//this two steps replace flour and multiply by 10^decimal
$strAmount = substr($strAmount, 0, strpos($strAmount, '.') + self::$decimal + 1);
$strAmount = str_replace('.', '', $strAmount);
$this->amount = intval($strAmount);
return $this;
}
/**
* @return float
*/
public function getAmount()
{
return floatval(number_format($this->amount / pow(10, self::$decimal), self::$decimal, '.', ''));
}
/**
* @return string
*/
public function getCurrency()
{
return $this->currency;
}
/**
* returns Money representation for sum of all given Money args
* @param array $moneys
* @return Money
*/
public static function sum($moneys)
{
$ret = new Money(0, $moneys[0]->getCurrency());
foreach ($moneys as $arg) { //TODO replace with add()
$ret->increasePreciseInnerAmount($arg->getPreciseInnerAmount());
}
return $ret;
}
/**
* @param array $moneys
* @return $this
*/
public function add($moneys)
{
foreach ($moneys as $arg) {
if($arg->getCurrency() === $this->getCurrency()) { //TODO add else option
$this->increasePreciseInnerAmount($arg->getPreciseInnerAmount());
}
}
return $this;
}
/**
* returns result of subtraction all of arguments from first one
* @param array $moneys
* @return Money
*/
public static function subtract($moneys)
{
$ret = new Money(0, $moneys[0]->getCurrency());
$ret->increasePreciseInnerAmount($moneys[0]->getPreciseInnerAmount());
foreach (array_slice($moneys, 1) as $arg) {
$ret->increasePreciseInnerAmount((-1) * $arg->getPreciseInnerAmount());
}
return $ret;
}
/**
* Subtract all of arguments from current object
* @param array $moneys
* @return Money
*/
public function sub($moneys)
{
foreach ($moneys as $arg) {
$this->increasePreciseInnerAmount((-1) * $arg->getPreciseInnerAmount());
}
return $this;
}
/**
* @param Money $money
* @param int $multiplier
* @return static
*/
public static function multiply($money,$multiplier)
{
if (gettype($multiplier) != 'integer') {
trigger_error('$multiplier must be type int, ' .gettype($multiplier) . 'given', E_USER_WARNING);
$multiplier = round($multiplier);
}
$ret = new Money(0, $money->getCurrency());
$ret->increasePreciseInnerAmount($money->getPreciseInnerAmount());
return $ret->multiplyAmount($multiplier);
}
}