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<?php |
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namespace Z38\SwissPayment\Money; |
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/** |
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* Base class for all currencies |
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*/ |
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abstract class Money |
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{ |
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/** |
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* @var int |
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*/ |
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protected $cents; |
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/** |
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* Constructor |
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* |
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* @param int $cents Amount of money in cents |
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*/ |
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public function __construct($cents) |
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{ |
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$this->cents = is_int($cents) ? $cents : intval(round($cents)); |
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} |
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/** |
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* Gets the currency code |
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* |
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* @return string|null An ISO 4217 currency code or null if currency is not known |
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*/ |
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abstract public function getCurrency(); |
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/** |
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* Gets the number of decimals |
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* |
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* @return int |
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*/ |
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abstract protected function getDecimals(); |
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/** |
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* Returns a formatted string (e.g. 15.560) |
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* |
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* @return string The formatted value |
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*/ |
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public function format() |
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{ |
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if ($this->getDecimals() > 0) { |
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$sign = ($this->cents < 0 ? '-' : ''); |
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$base = pow(10, $this->getDecimals()); |
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$minor = abs($this->cents) % $base; |
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$major = (abs($this->cents) - $minor) / $base; |
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return sprintf('%s%d.%0'.$this->getDecimals().'d', $sign, $major, $minor); |
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} else { |
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return sprintf('%d', $this->cents); |
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} |
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} |
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/** |
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* Returns the amount of money in cents |
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* |
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* @return int The amount in cents |
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*/ |
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public function getAmount() |
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{ |
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return $this->cents; |
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} |
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/** |
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* Returns the sum of this and an other amount of money |
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* |
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* @param Money $addend The addend |
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* |
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* @return Money The sum |
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* |
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* @throws \InvalidArgumentException When the currencies do not match |
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*/ |
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public function plus(self $addend) |
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{ |
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if ($this->getCurrency() !== $addend->getCurrency()) { |
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throw new \InvalidArgumentException('Can not add different currencies'); |
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} |
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return new static($this->cents + $addend->getAmount()); |
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} |
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/** |
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* Returns the subtraction of this and an other amount of money |
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* |
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* @param Money $subtrahend The subtrahend |
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* |
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* @return Money The difference |
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* |
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* @throws \InvalidArgumentException When the currencies do not match |
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*/ |
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public function minus(self $subtrahend) |
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{ |
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if ($this->getCurrency() !== $subtrahend->getCurrency()) { |
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throw new \InvalidArgumentException('Can not subtract different currencies'); |
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} |
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return new static($this->cents - $subtrahend->getAmount()); |
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} |
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/** |
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* Compares this instance with an other instance. |
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* |
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* @param Money $b The instance to which this instance is to be compared. |
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* |
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* @return int -1, 0 or 1 as this instance is less than, equal to, or greater than $b |
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* |
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* @throws \InvalidArgumentException When the currencies do not match |
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*/ |
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public function compareTo(self $b) |
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{ |
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if ($this->getCurrency() !== $b->getCurrency()) { |
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throw new \InvalidArgumentException('Can not compare different currencies'); |
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} |
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if ($this->getAmount() < $b->getAmount()) { |
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return -1; |
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} elseif ($this->getAmount() == $b->getAmount()) { |
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return 0; |
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} else { |
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return 1; |
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} |
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} |
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/** |
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* Returns true if the argument contains the same amount and the same currency. |
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* |
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* @param object $obj |
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* |
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* @return bool True if $obj is equal to this instance |
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*/ |
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public function equals($obj) |
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{ |
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if (!($obj instanceof self)) { |
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return false; |
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} |
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if ($this->getCurrency() !== $obj->getCurrency()) { |
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return false; |
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} |
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return ($this->getAmount() == $obj->getAmount()); |
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} |
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} |
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z38 /
swiss-payment
