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<?php
/* --------------------------------------------------------------
   CustomerDateOfBirth.inc.php 2016-03-14
   Gambio GmbH
   http://www.gambio.de
   Copyright (c) 2016 Gambio GmbH
   Released under the GNU General Public License (Version 2)
   [http://www.gnu.org/licenses/gpl-2.0.html]
   --------------------------------------------------------------
*/

/**
 * Value Object
 *
 * Class CustomerDateOfBirth
 *
 * Represents a customer birth date
 *
 * @category   System
 * @package    Customer
 * @subpackage ValueObjects
 * @extends    DateTime
 */
class CustomerDateOfBirth extends DateTime
{
    /**
     * Is null date?
     * 
     * @var bool
     */
    protected $isNullDate = false;


    /**
     * Constructor of the class CustomerDateOfBirth.
     *
     * @param string $p_dateOfBirth Customer's date of birth.
     */
    public function __construct($p_dateOfBirth = '1000-01-01 00:00:00')
    {
        $dateOfBirth = $p_dateOfBirth;
        
        if(strpos($dateOfBirth, '0000') === 0 || empty($dateOfBirth) || $dateOfBirth === '00.00.0000')
        {
            $dateOfBirth = '1000-01-01 00:00:00';
            $this->isNullDate = true;
        }

        parent::__construct($dateOfBirth);
    }


    /**
     * Format DateTime
     * 
     * Formats a date by a given pattern and ensures that dates that represent empty data are formatted to
     * '1000-01-01 00:00:00'
     *
     * @param string $p_format Date format.
     *
     * @return mixed|string Formatted date.
     */
    public function format($p_format)
    {
        $formattedDate = parent::format($p_format);

        return $formattedDate;
    }
}