<?php
/**
 * @package     Joomla.Site
 * @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
 */

defined('_JEXEC') or die;

use Joomla\CMS\Router\Route;

/**
 * Request model class.
 *
 * @since  3.9.0
 */
class PrivacyModelRequest extends JModelAdmin
{
	/**
	 * Creates an information request.
	 *
	 * @param   array  $data  The data expected for the form.
	 *
	 * @return  mixed  Exception | JException | boolean
	 *
	 * @since   3.9.0
	 */
	public function createRequest($data)
	{
		// Creating requests requires the site's email sending be enabled
		if (!JFactory::getConfig()->get('mailonline', 1))
		{
			$this->setError(JText::_('COM_PRIVACY_ERROR_CANNOT_CREATE_REQUEST_WHEN_SENDMAIL_DISABLED'));

			return false;
		}

		// Get the form.
		$form = $this->getForm();
		$data['email'] = JStringPunycode::emailToPunycode($data['email']);

		// Check for an error.
		if ($form instanceof Exception)
		{
			return $form;
		}

		// Filter and validate the form data.
		$data = $form->filter($data);
		$return = $form->validate($data);

		// Check for an error.
		if ($return instanceof Exception)
		{
			return $return;
		}

		// Check the validation results.
		if ($return === false)
		{
			// Get the validation messages from the form.
			foreach ($form->getErrors() as $formError)
			{
				$this->setError($formError->getMessage());
			}

			return false;
		}

		// Search for an open information request matching the email and type
		$db = $this->getDbo();
		$query = $db->getQuery(true)
			->select('COUNT(id)')
			->from('#__privacy_requests')
			->where('email = ' . $db->quote($data['email']))
			->where('request_type = ' . $db->quote($data['request_type']))
			->where('status IN (0, 1)');

		try
		{
			$result = (int) $db->setQuery($query)->loadResult();
		}
		catch (JDatabaseException $exception)
		{
			// Can't check for existing requests, so don't create a new one
			$this->setError(JText::_('COM_PRIVACY_ERROR_CHECKING_FOR_EXISTING_REQUESTS'));

			return false;
		}

		if ($result > 0)
		{
			$this->setError(JText::_('COM_PRIVACY_ERROR_PENDING_REQUEST_OPEN'));

			return false;
		}

		// Everything is good to go, create the request
		$token       = JApplicationHelper::getHash(JUserHelper::genRandomPassword());
		$hashedToken = JUserHelper::hashPassword($token);

		$data['confirm_token']            = $hashedToken;
		$data['confirm_token_created_at'] = JFactory::getDate()->toSql();

		if (!$this->save($data))
		{
			// The save function will set the error message, so just return here
			return false;
		}

		// Push a notification to the site's super users, deliberately ignoring if this process fails so the below message goes out
		JModelLegacy::addIncludePath(JPATH_ADMINISTRATOR . '/components/com_messages/models', 'MessagesModel');
		JTable::addIncludePath(JPATH_ADMINISTRATOR . '/components/com_messages/tables');

		/** @var MessagesModelMessage $messageModel */
		$messageModel = JModelLegacy::getInstance('Message', 'MessagesModel');

		$messageModel->notifySuperUsers(
			JText::_('COM_PRIVACY_ADMIN_NOTIFICATION_USER_CREATED_REQUEST_SUBJECT'),
			JText::sprintf('COM_PRIVACY_ADMIN_NOTIFICATION_USER_CREATED_REQUEST_MESSAGE', $data['email'])
		);

		// The mailer can be set to either throw Exceptions or return boolean false, account for both
		try
		{
			$app = JFactory::getApplication();

			$linkMode = $app->get('force_ssl', 0) == 2 ? Route::TLS_FORCE : Route::TLS_IGNORE;

			$substitutions = array(
				'[SITENAME]' => $app->get('sitename'),
				'[URL]'      => JUri::root(),
				'[TOKENURL]' => JRoute::link('site', 'index.php?option=com_privacy&view=confirm&confirm_token=' . $token, false, $linkMode, true),
				'[FORMURL]'  => JRoute::link('site', 'index.php?option=com_privacy&view=confirm', false, $linkMode, true),
				'[TOKEN]'    => $token,
				'\\n'        => "\n",
			);

			switch ($data['request_type'])
			{
				case 'export':
					$emailSubject = JText::_('COM_PRIVACY_EMAIL_REQUEST_SUBJECT_EXPORT_REQUEST');
					$emailBody    = JText::_('COM_PRIVACY_EMAIL_REQUEST_BODY_EXPORT_REQUEST');

					break;

				case 'remove':
					$emailSubject = JText::_('COM_PRIVACY_EMAIL_REQUEST_SUBJECT_REMOVE_REQUEST');
					$emailBody    = JText::_('COM_PRIVACY_EMAIL_REQUEST_BODY_REMOVE_REQUEST');

					break;

				default:
					$this->setError(JText::_('COM_PRIVACY_ERROR_UNKNOWN_REQUEST_TYPE'));

					return false;
			}

			foreach ($substitutions as $k => $v)
			{
				$emailSubject = str_replace($k, $v, $emailSubject);
				$emailBody    = str_replace($k, $v, $emailBody);
			}

			$mailer = JFactory::getMailer();
			$mailer->setSubject($emailSubject);
			$mailer->setBody($emailBody);
			$mailer->addRecipient($data['email']);

			$mailResult = $mailer->Send();

			if ($mailResult instanceof JException)
			{
				// JError was already called so we just need to return now
				return false;
			}
			elseif ($mailResult === false)
			{
				$this->setError($mailer->ErrorInfo);

				return false;
			}

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

			if (!$table->load($this->getState($this->getName() . '.id')))
			{
				$this->setError($table->getError());

				return false;
			}

			// Log the request's creation
			JModelLegacy::addIncludePath(JPATH_ADMINISTRATOR . '/components/com_actionlogs/models', 'ActionlogsModel');

			$message = array(
				'action'       => 'request-created',
				'requesttype'  => $table->request_type,
				'subjectemail' => $table->email,
				'id'           => $table->id,
				'itemlink'     => 'index.php?option=com_privacy&view=request&id=' . $table->id,
			);

			/** @var ActionlogsModelActionlog $model */
			$model = JModelLegacy::getInstance('Actionlog', 'ActionlogsModel');
			$model->addLog(array($message), 'COM_PRIVACY_ACTION_LOG_CREATED_REQUEST', 'com_privacy.request');

			// The email sent and the record is saved, everything is good to go from here
			return true;
		}
		catch (phpmailerException $exception)
		{
			$this->setError($exception->getMessage());

			return false;
		}
	}

	/**
	 * Method for getting the form from the model.
	 *
	 * @param   array    $data      Data for the form.
	 * @param   boolean  $loadData  True if the form is to load its own data (default case), false if not.
	 *
	 * @return  JForm|boolean  A JForm object on success, false on failure
	 *
	 * @since   3.9.0
	 */
	public function getForm($data = array(), $loadData = true)
	{
		return $this->loadForm('com_privacy.request', 'request', array('control' => 'jform'));
	}

	/**
	 * 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   $options  Configuration array for model. Optional.
	 *
	 * @return  JTable  A JTable object
	 *
	 * @since   3.9.0
	 * @throws  \Exception
	 */
	public function getTable($name = 'Request', $prefix = 'PrivacyTable', $options = array())
	{
		return parent::getTable($name, $prefix, $options);
	}

	/**
	 * Method to auto-populate the model state.
	 *
	 * Note. Calling getState in this method will result in recursion.
	 *
	 * @return  void
	 *
	 * @since   3.9.0
	 */
	protected function populateState()
	{
		// Get the application object.
		$params = JFactory::getApplication()->getParams('com_privacy');

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