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<?php
namespace Punic;
/**
* Currency-related stuff.
*/
class Currency
{
/**
* Returns all the currencies.
*
* @param bool $alsoUnused Set to true to receive also currencies not currently used by any country, false otherwise
* @param bool $alsoNotTender Set to true to receive also currencies that aren't legal tender in any country
* @param string $locale The locale to use. If empty we'll use the default locale set with {@link \Punic\Data::setDefaultLocale()}.
*
* @return array Array keys are the currency code, array values are the currency name. It's sorted by currency values
*/
public static function getAllCurrencies($alsoUnused = false, $alsoNotTender = false, $locale = '')
{
$result = array();
foreach (Data::get('currencies', $locale) as $code => $info) {
$result[$code] = $info['name'];
}
if ((!$alsoUnused) || (!$alsoNotTender)) {
$data = Data::getGeneric('currencyData');
$usedCurrencies = array();
$tenderCurrencies = array();
foreach ($data['regions'] as $usages) {
foreach ($usages as $usage) {
if (!isset($usage['to'])) {
$usedCurrencies[$usage['currency']] = true;
}
if ((!isset($usage['notTender'])) || (!$usage['notTender'])) {
$tenderCurrencies[$usage['currency']] = true;
}
}
}
if (!$alsoUnused) {
$result = array_intersect_key($result, $usedCurrencies);
}
if (!$alsoNotTender) {
$result = array_intersect_key($result, $tenderCurrencies);
}
}
$sorter = new \Punic\Comparer();
$sorter->sort($result, true);
return $result;
}
/**
* Returns the name of a currency given its code.
*
* @param string $currencyCode The currency code
* @param null|number|string The quantity identifier. Allowed values:
* <ul>
* <li>`null` to return the standard name, not associated to any quantity</li>
* <li>`number` to return the name following the plural rule for the specified quantity</li>
* <li>string `'zero'|'one'|'two'|'few'|'many'|'other'` the plural rule
* </ul>
* @param string $locale The locale to use. If empty we'll use the default locale set with {@link \Punic\Data::setDefaultLocale()}.
*
* @return string Returns an empty string if $currencyCode is not valid, the localized currency name otherwise
*/
public static function getName($currencyCode, $quantity = null, $locale = '')
{
$result = '';
$data = static::getLocaleData($currencyCode, $locale);
if (is_array($data)) {
$result = $data['name'];
if (($quantity !== null) && isset($data['pluralName'])) {
if (is_string($data) && in_array($quantity, array('zero', 'one', 'two', 'few', 'many', 'other'))) {
$pluralRule = $quantity;
} else {
$pluralRule = Plural::getRule($quantity, $locale);
}
if (!isset($data['pluralName'][$pluralRule])) {
$pluralRule = 'other';
}
$result = $data['pluralName'][$pluralRule];
}
}
return $result;
}
/**
* Returns the name of a currency given its code.
*
* @param string $currencyCode The currency code
* @param string $which Which symbol flavor do you prefer? 'narrow' for narrow symbols, 'alt' for alternative. Other values: standard/default symbol
* @param string $locale The locale to use. If empty we'll use the default locale set with {@link \Punic\Data::setDefaultLocale()}.
*
* @return string Returns an empty string if $currencyCode is not valid, the localized currency name otherwise
*/
public static function getSymbol($currencyCode, $which = '', $locale = '')
{
$result = '';
$data = static::getLocaleData($currencyCode, $locale);
if (is_array($data)) {
switch ($which) {
case 'narrow':
if (isset($data['symbolNarrow'])) {
$result = $data['symbolNarrow'];
}
break;
case 'alt':
if (isset($data['symbolAlt'])) {
$result = $data['symbolAlt'];
}
break;
}
if ((strlen($result) === 0) && ($which !== 'alt')) {
if (isset($data['symbol'])) {
$result = $data['symbol'];
}
if (!isset($result[0])) {
$result = $currencyCode;
}
}
}
return $result;
}
/**
* Return the history for the currencies used in a territory.
*
* @param string $territoryCode The territoy code
*
* @return array Return a list of items with these keys:
* <ul>
* <li>string `currency`: the currency code (always present)</li>
* <li>string `from`: start date of the currency validity in the territory (not present if no start date) - Format is YYYY-MM-DD</li>
* <li>string `to`: end date of the currency validity in the territory (not present if no end date) - Format is YYYY-MM-DD</li>
* <li>bool `tender`: true if the currency was or is legal tender, false otherwise (always present)</li>
* </ul>
*/
public static function getCurrencyHistoryForTerritory($territoryCode)
{
$result = array();
if (preg_match('/^[A-Z]{2}|[0-9]{3}$/', $territoryCode)) {
$data = Data::getGeneric('currencyData');
if (isset($data['regions'][$territoryCode])) {
foreach ($data['regions'][$territoryCode] as $c) {
if (isset($c['notTender'])) {
$c['tender'] = !$c['notTender'];
unset($c['notTender']);
} else {
$c['tender'] = true;
}
$result[] = $c;
}
}
}
return $result;
}
/**
* Return the currency to be used in a territory.
*
* @param string $territoryCode The territoy code
*
* @return string Returns an empty string if $territoryCode is not valid or we don't have info about it, the currency code otherwise
*/
public static function getCurrencyForTerritory($territoryCode)
{
$result = '';
$history = static::getCurrencyHistoryForTerritory($territoryCode);
if (!empty($history)) {
$today = @date('Y-m-d');
foreach ($history as $c) {
if ((!isset($c['to'])) || (strcmp($c['to'], $today) >= 0)) {
$result = $c['currency'];
if ($c['tender']) {
break;
}
}
}
}
return $result;
}
protected static function getLocaleData($currencyCode, $locale)
{
$result = null;
if (is_string($currencyCode) && (strlen($currencyCode) === 3)) {
$data = Data::get('currencies', $locale);
if (isset($data[$currencyCode])) {
$result = $data[$currencyCode];
}
}
return $result;
}
}