Flip currency symbol / value in cost field

/**
 * Handle reversing the position of the currency symbol such that it displays
 * on the right, rather than the left, and optionally adds some space between
 * them.
 */
class Tribe_Reverse_Currency_Position
{
    public static $space = '';


    public static function take_effect($space = '') {
        self::$space = $space;
        add_filter('tribe_get_cost', array(__CLASS__, 'filter_cost'), 10, 3);
    }

    public static function filter_cost($cost, $post_id, $has_symbol) {
        if (!$has_symbol) return $cost;
        $symbol = self::post_currency_symbol($post_id);

        if (0 === strpos($cost, $symbol))
            return substr($cost, strlen($symbol)) . self::$space . $symbol;
        else return $cost;
    }

    protected static function post_currency_symbol($post_id) {
        if ( ! ($symbol = tribe_get_event_meta($post_id, '_EventCurrencySymbol', true)) )
            return tribe_get_option( 'defaultCurrencySymbol', '$' );
        else return $symbol;
    }
}


/**
 * Without any parameters it simply swaps the currency symbol so that it displays on
 * the right of the value. Optionally a string can be passed to separate the value
 * and the symbol with some space. Examples:
 *
 *  Tribe_Reverse_Currency_Position::take_effect(' ');
 *  Tribe_Reverse_Currency_Position::take_effect(' ');
 */
Tribe_Reverse_Currency_Position::take_effect();