<?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
 */

defined('_JEXEC') or die;

use Joomla\Utilities\ArrayHelper;

/**
 * Consents management model class.
 *
 * @since  3.9.0
 */
class PrivacyModelConsents extends JModelList
{
	/**
	 * Constructor.
	 *
	 * @param   array  $config  An optional associative array of configuration settings.
	 *
	 * @since   3.9.0
	 */
	public function __construct($config = array())
	{
		if (empty($config['filter_fields']))
		{
			$config['filter_fields'] = array(
				'id', 'a.id', 
				'user_id', 'a.user_id',
				'subject', 'a.subject',
				'created', 'a.created',
				'username', 'u.username',
				'state', 'a.state'
			);
		}

		parent::__construct($config);
	}

	/**
	 * Method to get a JDatabaseQuery object for retrieving the data set from a database.
	 *
	 * @return  JDatabaseQuery
	 *
	 * @since   3.9.0
	 */
	protected function getListQuery()
	{
		// Create a new query object.
		$db    = $this->getDbo();
		$query = $db->getQuery(true);

		// Select the required fields from the table.
		$query->select($this->getState('list.select', 'a.*'));
		$query->from($db->quoteName('#__privacy_consents', 'a'));

		// Join over the users for the username.
		$query->select($db->quoteName('u.username', 'username'));
		$query->join('LEFT', $db->quoteName('#__users', 'u') . ' ON u.id = a.user_id');

		// Filter by search in email
		$search = $this->getState('filter.search');

		if (!empty($search))
		{
			if (stripos($search, 'id:') === 0)
			{
				$query->where($db->quoteName('a.id') . ' = ' . (int) substr($search, 3));
			}
			elseif (stripos($search, 'uid:') === 0)
			{
				$query->where($db->quoteName('a.user_id') . ' = ' . (int) substr($search, 4));
			}
			else
			{
				$search = $db->quote('%' . $db->escape($search, true) . '%');
				$query->where('(' . $db->quoteName('u.username') . ' LIKE ' . $search . ')');
			}
		}

		$state = $this->getState('filter.state');

		if ($state != '')
		{
			$query->where($db->quoteName('a.state') . ' = ' . (int) $state);
		}

		// Handle the list ordering.
		$ordering  = $this->getState('list.ordering');
		$direction = $this->getState('list.direction');

		if (!empty($ordering))
		{
			$query->order($db->escape($ordering) . ' ' . $db->escape($direction));
		}

		return $query;
	}

	/**
	 * Method to get a store id based on model configuration state.
	 *
	 * This is necessary because the model is used by the component and
	 * different modules that might need different sets of data or different
	 * ordering requirements.
	 *
	 * @param   string  $id  A prefix for the store id.
	 *
	 * @return  string
	 *
	 * @since   3.9.0
	 */
	protected function getStoreId($id = '')
	{
		// Compile the store id.
		$id .= ':' . $this->getState('filter.search');

		return parent::getStoreId($id);
	}

	/**
	 * Method to auto-populate the model state.
	 *
	 * Note. Calling getState in this method will result in recursion.
	 *
	 * @param   string  $ordering   An optional ordering field.
	 * @param   string  $direction  An optional direction (asc|desc).
	 *
	 * @return  void
	 *
	 * @since   3.9.0
	 */
	protected function populateState($ordering = 'a.id', $direction = 'desc')
	{
		// Load the filter state.
		$this->setState(
			'filter.search',
			$this->getUserStateFromRequest($this->context . '.filter.search', 'filter_search')
		);

		$this->setState(
			'filter.subject',
			$this->getUserStateFromRequest($this->context . '.filter.subject', 'filter_subject')
		);

		$this->setState(
			'filter.state',
			$this->getUserStateFromRequest($this->context . '.filter.state', 'filter_state')
		);

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

		// List state information.
		parent::populateState($ordering, $direction);
	}

	/**
	 * Method to invalidate specific consents.
	 *
	 * @param   array  $pks  The ids of the consents to invalidate.
	 *
	 * @return  boolean  True on success.
	 */
	public function invalidate($pks)
	{
		// Sanitize the ids.
		$pks = (array) $pks;
		$pks = ArrayHelper::toInteger($pks);

		try
		{
			$db = $this->getDbo();
			$query = $db->getQuery(true)
				->update($db->quoteName('#__privacy_consents'))
				->set($db->quoteName('state') . ' = -1')
				->where($db->quoteName('id') . ' IN (' . implode(',', $pks) . ')')
				->where($db->quoteName('state') . ' = 1');
			$db->setQuery($query);
			$db->execute();
		}
		catch (JDatabaseExceptionExecuting $e)
		{
			$this->setError($e->getMessage());

			return false;
		}

		return true;
	}

	/**
	 * Method to invalidate a group of specific consents.
	 *
	 * @param   array  $subject  The subject of the consents to invalidate.
	 *
	 * @return  boolean  True on success.
	 */
	public function invalidateAll($subject)
	{
		try
		{
			$db = $this->getDbo();
			$query = $db->getQuery(true)
				->update($db->quoteName('#__privacy_consents'))
				->set($db->quoteName('state') . ' = -1')
				->where($db->quoteName('subject') . ' = ' . $db->quote($subject))
				->where($db->quoteName('state') . ' = 1');
			$db->setQuery($query);
			$db->execute();
		}
		catch (JDatabaseExceptionExecuting $e)
		{
			$this->setError($e->getMessage());

			return false;
		}

		return true;
	}
}