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<?php
namespace Money;
/**
* Currency Value Object.
*
* Holds Currency specific data.
*
* @author Mathias Verraes
*
* @psalm-immutable
*/
final class Currency implements \JsonSerializable
{
/**
* Currency code.
*
* @var string
*/
private $code;
/**
* @param string $code
*/
public function __construct($code)
{
if (!is_string($code)) {
throw new \InvalidArgumentException('Currency code should be string');
}
if ($code === '') {
throw new \InvalidArgumentException('Currency code should not be empty string');
}
$this->code = $code;
}
/**
* Returns the currency code.
*
* @return string
*/
public function getCode()
{
return $this->code;
}
/**
* Checks whether this currency is the same as an other.
*
* @param Currency $other
*
* @return bool
*/
public function equals(Currency $other)
{
return $this->code === $other->code;
}
/**
* Checks whether this currency is available in the passed context.
*
* @param Currencies $currencies
*
* @return bool
*/
public function isAvailableWithin(Currencies $currencies)
{
return $currencies->contains($this);
}
/**
* @return string
*/
public function __toString()
{
return $this->code;
}
/**
* {@inheritdoc}
*
* @return string
*/
public function jsonSerialize()
{
return $this->code;
}
}