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| <?php | |
| namespace Money\Currencies; | |
| use Money\Currencies; | |
| use Money\Currency; | |
| use Money\Exception\UnknownCurrencyException; | |
| /** | |
| * List of supported ISO 4217 currency codes and names. | |
| * | |
| * @author Mathias Verraes | |
| */ | |
| final class ISOCurrencies implements Currencies | |
| { | |
| /** | |
| * Map of known currencies indexed by code. | |
| * | |
| * @var array | |
| */ | |
| private static $currencies; | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function contains(Currency $currency) | |
| { | |
| return isset($this->getCurrencies()[$currency->getCode()]); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function subunitFor(Currency $currency) | |
| { | |
| if (!$this->contains($currency)) { | |
| throw new UnknownCurrencyException('Cannot find ISO currency '.$currency->getCode()); | |
| } | |
| return $this->getCurrencies()[$currency->getCode()]['minorUnit']; | |
| } | |
| /** | |
| * Returns the numeric code for a currency. | |
| * | |
| * @param Currency $currency | |
| * | |
| * @return int | |
| * | |
| * @throws UnknownCurrencyException If currency is not available in the current context | |
| */ | |
| public function numericCodeFor(Currency $currency) | |
| { | |
| if (!$this->contains($currency)) { | |
| throw new UnknownCurrencyException('Cannot find ISO currency '.$currency->getCode()); | |
| } | |
| return $this->getCurrencies()[$currency->getCode()]['numericCode']; | |
| } | |
| /** | |
| * @return \Traversable | |
| */ | |
| public function getIterator() | |
| { | |
| return new \ArrayIterator( | |
| array_map( | |
| function ($code) { | |
| return new Currency($code); | |
| }, | |
| array_keys($this->getCurrencies()) | |
| ) | |
| ); | |
| } | |
| /** | |
| * Returns a map of known currencies indexed by code. | |
| * | |
| * @return array | |
| */ | |
| private function getCurrencies() | |
| { | |
| if (null === self::$currencies) { | |
| self::$currencies = $this->loadCurrencies(); | |
| } | |
| return self::$currencies; | |
| } | |
| /** | |
| * @return array | |
| */ | |
| private function loadCurrencies() | |
| { | |
| $file = __DIR__.'/../../resources/currency.php'; | |
| if (file_exists($file)) { | |
| return require $file; | |
| } | |
| throw new \RuntimeException('Failed to load currency ISO codes.'); | |
| } | |
| } |