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<?php |
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namespace Phalcon\Cashier; |
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use Exception; |
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class Cashier |
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{ |
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/** |
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* The current currency. |
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* |
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* @var string |
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*/ |
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protected static $currency = 'usd'; |
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/** |
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* The current currency symbol. |
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* |
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* @var string |
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*/ |
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protected static $currencySymbol = '$'; |
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/** |
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* The custom currency formatter. |
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* |
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* @var callable |
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*/ |
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protected static $formatCurrencyUsing; |
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/** |
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* Set the currency to be used when billing users. |
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* |
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* @param string $currency |
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* @param string|null $symbol |
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* @return void |
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*/ |
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public static function useCurrency($currency, $symbol = null) |
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{ |
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static::$currency = $currency; |
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static::useCurrencySymbol($symbol ?: static::guessCurrencySymbol($currency)); |
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} |
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/** |
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* Guess the currency symbol for the given currency. |
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* |
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* @param string $currency |
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* @return string |
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*/ |
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protected static function guessCurrencySymbol($currency) |
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{ |
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switch (strtolower($currency)) { |
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case 'usd': |
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case 'aud': |
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case 'cad': |
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return '$'; |
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case 'eur': |
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return '€'; |
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case 'gbp': |
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return '£'; |
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default: |
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throw new Exception('Unable to guess symbol for currency. Please explicitly specify it.'); |
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} |
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} |
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/** |
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* Get the currency currently in use. |
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* |
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* @return string |
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*/ |
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public static function usesCurrency() |
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{ |
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return static::$currency; |
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} |
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/** |
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* Set the currency symbol to be used when formatting currency. |
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* |
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* @param string $symbol |
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* @return void |
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*/ |
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public static function useCurrencySymbol($symbol) |
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{ |
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static::$currencySymbol = $symbol; |
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} |
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/** |
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* Get the currency symbol currently in use. |
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* |
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* @return string |
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*/ |
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public static function usesCurrencySymbol() |
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{ |
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return static::$currencySymbol; |
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} |
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/** |
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* Set the custom currency formatter. |
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* |
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* @param callable $callback |
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* @return void |
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*/ |
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public static function formatCurrencyUsing(callable $callback) |
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{ |
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static::$formatCurrencyUsing = $callback; |
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} |
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/** |
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* Format the given amount into a displayable currency. |
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* |
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* @param int $amount |
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* @return string |
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*/ |
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public static function formatAmount($amount) |
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{ |
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if (static::$formatCurrencyUsing) { |
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return call_user_func(static::$formatCurrencyUsing, $amount); |
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} |
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$amount = number_format($amount / 100, 2); |
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if (static::startsWith($amount, '-')) { |
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return '-' . static::usesCurrencySymbol() . ltrim($amount, '-'); |
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} |
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return static::usesCurrencySymbol() . $amount; |
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} |
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/** |
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* @param $haystack |
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* @param $needle |
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* @return bool |
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*/ |
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public static function startsWith($haystack, $needle) |
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{ |
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// search backwards starting from haystack length characters from the end |
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return $needle === '' || strrpos($haystack, $needle, -strlen($haystack)) !== false; |
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} |
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/** |
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* @param $haystack |
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* @param $needle |
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* @return bool |
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*/ |
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public static function endsWith($haystack, $needle) |
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{ |
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// search forward starting from end minus needle length characters |
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return $needle === '' || (($temp = strlen($haystack) - strlen($needle)) >= 0 && strpos($haystack, $needle, $temp) !== false); |
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} |
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} |
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bakaphp /
cashier
