/
Cashier.php
134 lines (121 loc) · 2.95 KB
/
Cashier.php
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<?php
namespace yii2mod\cashier;
use yii\base\Exception;
use yii\helpers\StringHelper;
/**
* Class Cashier
*
* @package yii2mod\cashier
*/
class Cashier
{
/**
* The current currency.
*
* @var string
*/
protected static $currency = 'usd';
/**
* The current currency symbol.
*
* @var string
*/
protected static $currencySymbol = '$';
/**
* The custom currency formatter.
*
* @var callable
*/
protected static $formatCurrencyUsing;
/**
* Set the currency to be used when billing users.
*
* @param string $currency
* @param string|null $symbol
*
* @throws Exception
*/
public static function useCurrency(string $currency, ?string $symbol = null): void
{
static::$currency = $currency;
static::useCurrencySymbol($symbol ?: static::guessCurrencySymbol($currency));
}
/**
* Guess the currency symbol for the given currency.
*
* @param string $currency
*
* @return string
*
* @throws Exception
*/
protected static function guessCurrencySymbol(string $currency): string
{
switch (strtolower($currency)) {
case 'usd':
case 'aud':
case 'cad':
return '$';
case 'eur':
return '€';
case 'gbp':
return '£';
default:
throw new Exception('Unable to guess symbol for currency. Please explicitly specify it.');
}
}
/**
* Get the currency currently in use.
*
* @return string
*/
public static function usesCurrency(): string
{
return static::$currency;
}
/**
* Set the currency symbol to be used when formatting currency.
*
* @param string $symbol
*/
public static function useCurrencySymbol(string $symbol): void
{
static::$currencySymbol = $symbol;
}
/**
* Get the currency symbol currently in use.
*
* @return string
*/
public static function usesCurrencySymbol(): string
{
return static::$currencySymbol;
}
/**
* Set the custom currency formatter.
*
* @param callable $callback
*/
public static function formatCurrencyUsing(callable $callback): void
{
static::$formatCurrencyUsing = $callback;
}
/**
* Format the given amount into a displayable currency.
*
* @param int $amount
*
* @return string
*/
public static function formatAmount(int $amount): string
{
if (static::$formatCurrencyUsing) {
return call_user_func(static::$formatCurrencyUsing, $amount);
}
$amount = number_format($amount / 100, 2);
if (StringHelper::startsWith($amount, '-')) {
return '-' . static::usesCurrencySymbol() . ltrim($amount, '-');
}
return static::usesCurrencySymbol() . $amount;
}
}