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<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_redirect
 *
 * @copyright   Copyright (C) 2005 - 2020 Open Source Matters, Inc. All
rights reserved.
 * @license     GNU General Public License version 2 or later; see
LICENSE.txt
 */

defined('_JEXEC') or die;

/**
 * Link Table for Redirect.
 *
 * @since  1.6
 */
class RedirectTableLink extends JTable
{
	/**
	 * Constructor
	 *
	 * @param   JDatabaseDriver  $db  Database object.
	 *
	 * @since   1.6
	 */
	public function __construct($db)
	{
		parent::__construct('#__redirect_links', 'id', $db);
	}

	/**
	 * Overloaded check function
	 *
	 * @return  boolean
	 *
	 * @since   1.6
	 */
	public function check()
	{
		$this->old_url = trim(rawurldecode($this->old_url));
		$this->new_url = trim(rawurldecode($this->new_url));

		// Check for valid name.
		if (empty($this->old_url))
		{
			$this->setError(JText::_('COM_REDIRECT_ERROR_SOURCE_URL_REQUIRED'));

			return false;
		}

		// Check for NOT NULL.
		if (empty($this->referer))
		{
			$this->referer = '';
		}

		// Check for valid name if not in advanced mode.
		if (empty($this->new_url) &&
JComponentHelper::getParams('com_redirect')->get('mode',
0) == false)
		{
			$this->setError(JText::_('COM_REDIRECT_ERROR_DESTINATION_URL_REQUIRED'));

			return false;
		}
		elseif (empty($this->new_url) &&
JComponentHelper::getParams('com_redirect')->get('mode',
0) == true)
		{
			// Else if an empty URL and in redirect mode only throw the same error
if the code is a 3xx status code
			if ($this->header < 400 && $this->header >= 300)
			{
				$this->setError(JText::_('COM_REDIRECT_ERROR_DESTINATION_URL_REQUIRED'));

				return false;
			}
		}

		// Check for duplicates
		if ($this->old_url == $this->new_url)
		{
			$this->setError(JText::_('COM_REDIRECT_ERROR_DUPLICATE_URLS'));

			return false;
		}

		$db = $this->getDbo();

		// Check for existing name
		$query = $db->getQuery(true)
			->select($db->quoteName('id'))
			->select($db->quoteName('old_url'))
			->from('#__redirect_links')
			->where($db->quoteName('old_url') . ' = ' .
$db->quote($this->old_url));
		$db->setQuery($query);
		$urls = $db->loadAssocList();

		foreach ($urls as $url)
		{
			if ($url['old_url'] === $this->old_url && (int)
$url['id'] != (int) $this->id)
			{
				$this->setError(JText::_('COM_REDIRECT_ERROR_DUPLICATE_OLD_URL'));

				return false;
			}
		}

		return true;
	}

	/**
	 * Overriden store method to set dates.
	 *
	 * @param   boolean  $updateNulls  True to update fields even if they are
null.
	 *
	 * @return  boolean  True on success.
	 *
	 * @since   1.6
	 */
	public function store($updateNulls = false)
	{
		$date = JFactory::getDate()->toSql();

		$this->modified_date = $date;

		if (!$this->id)
		{
			// New record.
			$this->created_date = $date;
		}

		return parent::store($updateNulls);
	}
}