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<?php
/**
 * @package     Joomla.Site
 * @subpackage  com_config
 *
 * @copyright   (C) 2013 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Config\Site\Model;

\defined('_JEXEC') or die;

use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Filesystem\Path;
use Joomla\CMS\Form\Form;
use Joomla\CMS\Language\Text;

/**
 * Template style model.
 *
 * @since  3.2
 */
class TemplatesModel extends FormModel
{
	/**
	 * Method to auto-populate the model state.
	 *
	 * Note. Calling getState in this method will result in recursion.
	 *
	 * @return  null
	 *
	 * @since   3.2
	 */
	protected function populateState()
	{
		parent::populateState();

$this->setState('params', ComponentHelper::getParams('com_templates'));
	}

/**
	 * Method to get the record form.
	 *
	 * @param   array    $data      An optional array of data for the form to interrogate.
	 * @param   boolean  $loadData  True if the form is to load its own data (default case), false if not.
	 *
	 * @return  Form|bool    A JForm object on success, false on failure
	 *
	 * @since   3.2
	 */
	public function getForm($data = array(), $loadData = true)
	{
		try
		{
			// Get the form.
			$form = $this->loadForm('com_config.templates', 'templates', array('load_data' => $loadData));

$data = array();
			$this->preprocessForm($form, $data);

// Load the data into the form
			$form->bind($data);
		}
		catch (\Exception $e)
		{
			Factory::getApplication()->enqueueMessage($e->getMessage());

return false;
		}

if (empty($form))
		{
			return false;
		}

return $form;
	}

/**
	 * Method to preprocess the form
	 *
	 * @param   Form    $form   A form object.
	 * @param   mixed   $data   The data expected for the form.
	 * @param   string  $group  Plugin group to load
	 *
	 * @return  void
	 *
	 * @since   3.2
	 * @throws	\Exception if there is an error in the form event.
	 */
	protected function preprocessForm(Form $form, $data, $group = 'content')
	{
		$lang = Factory::getLanguage();

$template = Factory::getApplication()->getTemplate();

// Load the core and/or local language file(s).
		$lang->load('tpl_' . $template, JPATH_BASE)
		|| $lang->load('tpl_' . $template, JPATH_BASE . '/templates/' . $template);

// Look for com_config.xml, which contains fields to display
		$formFile = Path::clean(JPATH_BASE . '/templates/' . $template . '/com_config.xml');

if (!file_exists($formFile))
		{
			// If com_config.xml not found, fall back to templateDetails.xml
			$formFile = Path::clean(JPATH_BASE . '/templates/' . $template . '/templateDetails.xml');
		}

// Get the template form.
		if (file_exists($formFile) && !$form->loadFile($formFile, false, '//config'))
		{
			throw new \Exception(Text::_('JERROR_LOADFILE_FAILED'));
		}

// Attempt to load the xml file.
		if (!$xml = simplexml_load_file($formFile))
		{
			throw new \Exception(Text::_('JERROR_LOADFILE_FAILED'));
		}

// Trigger the default form events.
		parent::preprocessForm($form, $data, $group);
	}
}