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<?php
/* --------------------------------------------------------------
   EmailContent.inc.php 2015-01-29 gm
   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]
   --------------------------------------------------------------
*/

MainFactory::load_class('EmailContentInterface');

/**
 * Class EmailContent
 *
 * Email content could be either plain text or HTML.
 *
 * @category   System
 * @package    Email
 * @subpackage ValueObjects
 */
class EmailContent implements EmailContentInterface
{
    /**
     * E-Mail content.
     * @var string Email Content
     */
    protected $content;


    /**
     * Constructor
     *
     * Executes the validation checks upon the email content.
     *
     * @param string $p_content Could be either plain text or HTML.
     * @throws InvalidArgumentException On invalid argument.
     */
    public function __construct($p_content)
    {
        if(!is_string($p_content))
        {
            throw new InvalidArgumentException('Invalid argument provided (expected string content) $p_content: '
                                               . print_r($p_content, true));
        }

        $this->content = $p_content;
    }


    /**
     * Returns the email content value.
     *
     * @return string Equivalent string.
     */
    public function __toString()
    {
        return $this->content;
    }
}