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<?php

/* --------------------------------------------------------------
   CurrencyCode.php 2015-11-05
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2015 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

/**
 * CurrencyCode
 *
 * @category System
 * @package  Shared
 */
class CurrencyCode
{
    /**
     * Holds the currency code as a string.
     *
     * @var string
     */
    protected $code;

    /**
     * Holds the currency value as a decimal type.
     *
     * @var float
     */
    protected $currencyValue;


    /**
     * Constructor
     *
     * Validates the parameter and saves it to the property in uppercase format.
     *
     * @throws InvalidArgumentException if Argument is not exactly 3 letters
     *
     * @param \StringType $code          The currency Code (e.g. EUR)
     * @param \DecimalType        $currencyValue Value of the currency
     */
    public function __construct(StringType $code, DecimalType $currencyValue = null)
    {
        // Validate string length.
        if(strlen($code->asString()) !== 3)
        {
            throw new InvalidArgumentException('Argument must have exactly 3 letters');
        }
        
        $this->code          = strtoupper($code->asString());
        $this->currencyValue = (null !== $currencyValue) ? $currencyValue->asDecimal() : 1.00;
    }

    /**
     * Get Code
     *
     * Returns the currency code as a string.
     *
     * @return string
     */
    public function getCode()
    {
        return $this->code;
    }


    /**
     * Get Currency Value
     *
     * Returns the currency value as a decimal type.
     *
     * @return DecimalType
     */
    public function getCurrencyValue()
    {
        return $this->currencyValue;
    }
}