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<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_privacy
 *
 * @copyright   (C) 2018 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Privacy\Administrator\Model;

\defined('_JEXEC') or die;

use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Language\Language;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Mail\MailTemplate;
use Joomla\CMS\MVC\Model\BaseDatabaseModel;
use Joomla\CMS\Plugin\PluginHelper;
use Joomla\CMS\Table\Table;
use Joomla\CMS\Uri\Uri;
use Joomla\CMS\User\User;
use Joomla\Component\Actionlogs\Administrator\Model\ActionlogModel;
use Joomla\Component\Privacy\Administrator\Export\Domain;
use Joomla\Component\Privacy\Administrator\Helper\PrivacyHelper;
use Joomla\Component\Privacy\Administrator\Table\RequestTable;
use PHPMailer\PHPMailer\Exception as phpmailerException;

/**
 * Export model class.
 *
 * @since  3.9.0
 */
class ExportModel extends BaseDatabaseModel
{
	/**
	 * Create the export document for an information request.
	 *
	 * @param   integer  $id  The request ID to process
	 *
	 * @return  Domain[]|boolean  A SimpleXMLElement object for a successful export or boolean false on an error
	 *
	 * @since   3.9.0
	 */
	public function collectDataForExportRequest($id = null)
	{
		$id = !empty($id) ? $id : (int) $this->getState($this->getName() . '.request_id');

if (!$id)
		{
			$this->setError(Text::_('COM_PRIVACY_ERROR_REQUEST_ID_REQUIRED_FOR_EXPORT'));

return false;
		}

/** @var RequestTable $table */
		$table = $this->getTable();

if (!$table->load($id))
		{
			$this->setError($table->getError());

return false;
		}

if ($table->request_type !== 'export')
		{
			$this->setError(Text::_('COM_PRIVACY_ERROR_REQUEST_TYPE_NOT_EXPORT'));

return false;
		}

if ($table->status != 1)
		{
			$this->setError(Text::_('COM_PRIVACY_ERROR_CANNOT_EXPORT_UNCONFIRMED_REQUEST'));

return false;
		}

// If there is a user account associated with the email address, load it here for use in the plugins
		$db = $this->getDbo();

$userId = (int) $db->setQuery(
			$db->getQuery(true)
				->select($db->quoteName('id'))
				->from($db->quoteName('#__users'))
				->where('LOWER(' . $db->quoteName('email') . ') = LOWER(:email)')
				->bind(':email', $table->email)
				->setLimit(1)
		)->loadResult();

$user = $userId ? User::getInstance($userId) : null;

// Log the export
		$this->logExport($table);

PluginHelper::importPlugin('privacy');

$pluginResults = Factory::getApplication()->triggerEvent('onPrivacyExportRequest', [$table, $user]);

$domains = [];

foreach ($pluginResults as $pluginDomains)
		{
			$domains = array_merge($domains, $pluginDomains);
		}

return $domains;
	}

/**
	 * Email the data export to the user.
	 *
	 * @param   integer  $id  The request ID to process
	 *
	 * @return  boolean
	 *
	 * @since   3.9.0
	 */
	public function emailDataExport($id = null)
	{
		$id = !empty($id) ? $id : (int) $this->getState($this->getName() . '.request_id');

if (!$id)
		{
			$this->setError(Text::_('COM_PRIVACY_ERROR_REQUEST_ID_REQUIRED_FOR_EXPORT'));

return false;
		}

$exportData = $this->collectDataForExportRequest($id);

if ($exportData === false)
		{
			// Error is already set, we just need to bail
			return false;
		}

/** @var RequestTable $table */
		$table = $this->getTable();

if (!$table->load($id))
		{
			$this->setError($table->getError());

return false;
		}

if ($table->request_type !== 'export')
		{
			$this->setError(Text::_('COM_PRIVACY_ERROR_REQUEST_TYPE_NOT_EXPORT'));

return false;
		}

if ($table->status != 1)
		{
			$this->setError(Text::_('COM_PRIVACY_ERROR_CANNOT_EXPORT_UNCONFIRMED_REQUEST'));

return false;
		}

// Log the email
		$this->logExportEmailed($table);

/*
		 * If there is an associated user account, we will attempt to send this email in the user's preferred language.
		 * Because of this, it is expected that Language::_() is directly called and that the Text class is NOT used
		 * for translating all messages.
		 *
		 * Error messages will still be displayed to the administrator, so those messages should continue to use the Text class.
		 */

$lang = Factory::getLanguage();

$db = $this->getDbo();

if ($userId)
		{
			$receiver = User::getInstance($userId);

/*
			 * We don't know if the user has admin access, so we will check if they have an admin language in their parameters,
			 * falling back to the site language, falling back to the currently active language
			 */

$langCode = $receiver->getParam('admin_language', '');

if (!$langCode)
			{
				$langCode = $receiver->getParam('language', $lang->getTag());
			}

$lang = Language::getInstance($langCode, $lang->getDebug());
		}

// Ensure the right language files have been loaded
		$lang->load('com_privacy', JPATH_ADMINISTRATOR)
			|| $lang->load('com_privacy', JPATH_ADMINISTRATOR . '/components/com_privacy');

// The mailer can be set to either throw Exceptions or return boolean false, account for both
		try
		{
			$app = Factory::getApplication();
			$mailer = new MailTemplate('com_privacy.userdataexport', $app->getLanguage()->getTag());

$templateData = [
				'sitename' => $app->get('sitename'),
				'url'      => Uri::root(),
			];

$mailer->addRecipient($table->email);
			$mailer->addTemplateData($templateData);
			$mailer->addAttachment('user-data_' . Uri::getInstance()->toString(['host']) . '.xml', PrivacyHelper::renderDataAsXml($exportData));

if ($mailer->send() === false)
			{
				$this->setError($mailer->ErrorInfo);

return false;
			}

return true;
		}
		catch (phpmailerException $exception)
		{
			$this->setError($exception->getMessage());

return false;
		}
	}

/**
	 * Method to get a table object, load it if necessary.
	 *
	 * @param   string  $name     The table name. Optional.
	 * @param   string  $prefix   The class prefix. Optional.
	 * @param   array   $options  Configuration array for model. Optional.
	 *
	 * @return  Table  A Table object
	 *
	 * @throws  \Exception
	 * @since   3.9.0
	 */
	public function getTable($name = 'Request', $prefix = 'Administrator', $options = [])
	{
		return parent::getTable($name, $prefix, $options);
	}

/**
	 * Log the data export to the action log system.
	 *
	 * @param   RequestTable  $request  The request record being processed
	 *
	 * @return  void
	 *
	 * @since   3.9.0
	 */
	public function logExport(RequestTable $request)
	{
		$user = Factory::getUser();

$message = [
			'action'      => 'export',
			'id'          => $request->id,
			'itemlink'    => 'index.php?option=com_privacy&view=request&id=' . $request->id,
			'userid'      => $user->id,
			'username'    => $user->username,
			'accountlink' => 'index.php?option=com_users&task=user.edit&id=' . $user->id,
		];

$this->getActionlogModel()->addLog([$message], 'COM_PRIVACY_ACTION_LOG_EXPORT', 'com_privacy.request', $user->id);
	}

/**
	 * Log the data export email to the action log system.
	 *
	 * @param   RequestTable  $request  The request record being processed
	 *
	 * @return  void
	 *
	 * @since   3.9.0
	 */
	public function logExportEmailed(RequestTable $request)
	{
		$user = Factory::getUser();

$message = [
			'action'      => 'export_emailed',
			'id'          => $request->id,
			'itemlink'    => 'index.php?option=com_privacy&view=request&id=' . $request->id,
			'userid'      => $user->id,
			'username'    => $user->username,
			'accountlink' => 'index.php?option=com_users&task=user.edit&id=' . $user->id,
		];

$this->getActionlogModel()->addLog([$message], 'COM_PRIVACY_ACTION_LOG_EXPORT_EMAILED', 'com_privacy.request', $user->id);
	}

/**
	 * Method to auto-populate the model state.
	 *
	 * @return  void
	 *
	 * @since   3.9.0
	 */
	protected function populateState()
	{
		// Get the pk of the record from the request.
		$this->setState($this->getName() . '.request_id', Factory::getApplication()->input->getUint('id'));

// Load the parameters.
		$this->setState('params', ComponentHelper::getParams('com_privacy'));
	}

/**
	 * Method to fetch an instance of the action log model.
	 *
	 * @return  ActionlogModel
	 *
	 * @since   4.0.0
	 */
	private function getActionlogModel(): ActionlogModel
	{
		return Factory::getApplication()->bootComponent('com_actionlogs')
			->getMVCFactory()->createModel('Actionlog', 'Administrator', ['ignore_request' => true]);
	}
}