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<?php
/* --------------------------------------------------------------
   ContactName.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('ContactNameInterface');

/**
 * Class ContactName
 *
 * Contact name will be the display name for an EmailContact object.
 *
 * @category   System
 * @package    Email
 * @subpackage ValueObjects
 */
class ContactName implements ContactNameInterface
{
    /**
     * Maximum name length constant.
     * @var int
     */
    const MAX_LENGTH = 128;

    /**
     * Contact name.
     *
     * @var string
     */
    protected $contactName;


    /**
     * Constructor
     *
     * Executes the validation checks upon the contact name.
     *
     * @throws InvalidArgumentException If the provided argument is not a string.
     *
     * @param string $p_contactName Contact name.
     */
    public function __construct($p_contactName)
    {
        if(!is_string($p_contactName)) // contact name CAN be empty string
        {
            throw new InvalidArgumentException('Invalid argument provided (expected string name) $p_contactName: '
                                               . print_r($p_contactName, true));
        }

        if(strlen(trim($p_contactName)) > self::MAX_LENGTH)
        {
            $p_contactName = substr($p_contactName, 0, self::MAX_LENGTH - 3) . '...';
        }

        $this->contactName = $p_contactName;
    }


    /**
     * Returns the contact name as a string.
     *
     * @return string Equivalent string.
     */
    public function __toString()
    {
        return $this->contactName;
    }
}