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<?php
/**
 * @package     Joomla.Site
 * @subpackage  com_newsfeeds
 *
 * @copyright   (C) 2006 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Newsfeeds\Site\Model;

\defined('_JEXEC') or die;

use Joomla\CMS\Categories\Categories;
use Joomla\CMS\Categories\CategoryNode;
use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Helper\TagsHelper;
use Joomla\CMS\Language\Multilanguage;
use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
use Joomla\CMS\MVC\Model\ListModel;
use Joomla\CMS\Table\Table;
use Joomla\Database\ParameterType;
use Joomla\Registry\Registry;

/**
 * Newsfeeds Component Category Model
 *
 * @since  1.5
 */
class CategoryModel extends ListModel
{
	/**
	 * Category items data
	 *
	 * @var array
	 */
	protected $_item = null;

	/**
	 * Array of newsfeeds in the category
	 *
	 * @var    \stdClass[]
	 */
	protected $_articles = null;

	/**
	 * Category left and right of this one
	 *
	 * @var    CategoryNode[]|null
	 */
	protected $_siblings = null;

	/**
	 * Array of child-categories
	 *
	 * @var    CategoryNode[]|null
	 */
	protected $_children = null;

	/**
	 * Parent category of the current one
	 *
	 * @var    CategoryNode|null
	 */
	protected $_parent = null;

	/**
	 * The category that applies.
	 *
	 * @var    object
	 */
	protected $_category = null;

	/**
	 * The list of other newsfeed categories.
	 *
	 * @var    array
	 */
	protected $_categories = null;

	/**
	 * Constructor.
	 *
	 * @param   array                $config   An optional associative array of configuration settings.
	 * @param   MVCFactoryInterface  $factory  The factory.
	 *
	 * @see    \Joomla\CMS\MVC\Model\BaseDatabaseModel
	 * @since   3.2
	 */
	public function __construct($config = array(), MVCFactoryInterface $factory = null)
	{
		if (empty($config['filter_fields']))
		{
			$config['filter_fields'] = array(
				'id', 'a.id',
				'name', 'a.name',
				'numarticles', 'a.numarticles',
				'link', 'a.link',
				'ordering', 'a.ordering',
			);
		}

		parent::__construct($config, $factory);
	}

	/**
	 * Method to get a list of items.
	 *
	 * @return  mixed  An array of objects on success, false on failure.
	 */
	public function getItems()
	{
		// Invoke the parent getItems method to get the main list
		$items = parent::getItems();

		// Convert the params field into an object, saving original in _params
		foreach ($items as $item)
		{
			if (!isset($this->_params))
			{
				$params = new Registry;
				$item->params = $params;
				$params->loadString($item->params);
			}

			// Some contexts may not use tags data at all, so we allow callers to disable loading tag data
			if ($this->getState('load_tags', true))
			{
				$item->tags = new TagsHelper;
				$item->tags->getItemTags('com_newsfeeds.newsfeed', $item->id);
			}
		}

		return $items;
	}

	/**
	 * Method to build an SQL query to load the list data.
	 *
	 * @return  string    An SQL query
	 *
	 * @since   1.6
	 */
	protected function getListQuery()
	{
		$user   = Factory::getUser();
		$groups = $user->getAuthorisedViewLevels();

		// Create a new query object.
		$db    = $this->getDbo();
		$query = $db->getQuery(true);

		// Select required fields from the categories.
		$query->select($this->getState('list.select', $db->quoteName('a') . '.*'))
			->from($db->quoteName('#__newsfeeds', 'a'))
			->whereIn($db->quoteName('a.access'), $groups);

		// Filter by category.
		if ($categoryId = (int) $this->getState('category.id'))
		{
			$query->where($db->quoteName('a.catid') . ' = :categoryId')
				->join('LEFT', $db->quoteName('#__categories', 'c'), $db->quoteName('c.id') . ' = ' . $db->quoteName('a.catid'))
				->whereIn($db->quoteName('c.access'), $groups)
				->bind(':categoryId', $categoryId, ParameterType::INTEGER);
		}

		// Filter by state
		$state = $this->getState('filter.published');

		if (is_numeric($state))
		{
			$state = (int) $state;
			$query->where($db->quoteName('a.published') . ' = :state')
				->bind(':state', $state, ParameterType::INTEGER);
		}
		else
		{
			$query->where($db->quoteName('a.published') . ' IN (0,1,2)');
		}

		// Filter by start and end dates.
		if ($this->getState('filter.publish_date'))
		{
			$nowDate = Factory::getDate()->toSql();

			$query->extendWhere(
				'AND',
				[
					$db->quoteName('a.publish_up') . ' IS NULL',
					$db->quoteName('a.publish_up') . ' <= :nowDate1',
				],
				'OR'
			)
				->extendWhere(
					'AND',
					[
						$db->quoteName('a.publish_down') . ' IS NULL',
						$db->quoteName('a.publish_down') . ' >= :nowDate2',
					],
					'OR'
				)
				->bind([':nowDate1', ':nowDate2'], $nowDate);
		}

		// Filter by search in title
		if ($search = $this->getState('list.filter'))
		{
			$search = '%' . $search . '%';
			$query->where($db->quoteName('a.name') . ' LIKE :search')
				->bind(':search', $search);
		}

		// Filter by language
		if ($this->getState('filter.language'))
		{
			$query->whereIn($db->quoteName('a.language'), [Factory::getLanguage()->getTag(), '*'], ParameterType::STRING);
		}

		// Add the list ordering clause.
		$query->order($db->escape($this->getState('list.ordering', 'a.ordering')) . ' ' . $db->escape($this->getState('list.direction', 'ASC')));

		return $query;
	}

	/**
	 * 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  $direction  An optional direction [asc|desc]
	 *
	 * @return void
	 *
	 * @since   1.6
	 *
	 * @throws \Exception
	 */
	protected function populateState($ordering = null, $direction = null)
	{
		$app = Factory::getApplication();
		$params = ComponentHelper::getParams('com_newsfeeds');

		// List state information
		$limit = $app->getUserStateFromRequest('global.list.limit', 'limit', $app->get('list_limit'), 'uint');
		$this->setState('list.limit', $limit);

		$limitstart = $app->input->get('limitstart', 0, 'uint');
		$this->setState('list.start', $limitstart);

		// Optional filter text
		$this->setState('list.filter', $app->input->getString('filter-search'));

		$orderCol = $app->input->get('filter_order', 'ordering');

		if (!in_array($orderCol, $this->filter_fields))
		{
			$orderCol = 'ordering';
		}

		$this->setState('list.ordering', $orderCol);

		$listOrder = $app->input->get('filter_order_Dir', 'ASC');

		if (!in_array(strtoupper($listOrder), array('ASC', 'DESC', '')))
		{
			$listOrder = 'ASC';
		}

		$this->setState('list.direction', $listOrder);

		$id = $app->input->get('id', 0, 'int');
		$this->setState('category.id', $id);

		$user = Factory::getUser();

		if ((!$user->authorise('core.edit.state', 'com_newsfeeds')) && (!$user->authorise('core.edit', 'com_newsfeeds')))
		{
			// Limit to published for people who can't edit or edit.state.
			$this->setState('filter.published', 1);

			// Filter by start and end dates.
			$this->setState('filter.publish_date', true);
		}

		$this->setState('filter.language', Multilanguage::isEnabled());

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

	/**
	 * Method to get category data for the current category
	 *
	 * @return  object
	 *
	 * @since   1.5
	 */
	public function getCategory()
	{
		if (!is_object($this->_item))
		{
			$app = Factory::getApplication();
			$menu = $app->getMenu();
			$active = $menu->getActive();

			if ($active)
			{
				$params = $active->getParams();
			}
			else
			{
				$params = new Registry;
			}

			$options = array();
			$options['countItems'] = $params->get('show_cat_items', 1) || $params->get('show_empty_categories', 0);
			$categories = Categories::getInstance('Newsfeeds', $options);
			$this->_item = $categories->get($this->getState('category.id', 'root'));

			if (is_object($this->_item))
			{
				$this->_children = $this->_item->getChildren();
				$this->_parent = false;

				if ($this->_item->getParent())
				{
					$this->_parent = $this->_item->getParent();
				}

				$this->_rightsibling = $this->_item->getSibling();
				$this->_leftsibling = $this->_item->getSibling(false);
			}
			else
			{
				$this->_children = false;
				$this->_parent = false;
			}
		}

		return $this->_item;
	}

	/**
	 * Get the parent category.
	 *
	 * @return  mixed  An array of categories or false if an error occurs.
	 */
	public function getParent()
	{
		if (!is_object($this->_item))
		{
			$this->getCategory();
		}

		return $this->_parent;
	}

	/**
	 * Get the sibling (adjacent) categories.
	 *
	 * @return  mixed  An array of categories or false if an error occurs.
	 */
	public function &getLeftSibling()
	{
		if (!is_object($this->_item))
		{
			$this->getCategory();
		}

		return $this->_leftsibling;
	}

	/**
	 * Get the sibling (adjacent) categories.
	 *
	 * @return  mixed  An array of categories or false if an error occurs.
	 */
	public function &getRightSibling()
	{
		if (!is_object($this->_item))
		{
			$this->getCategory();
		}

		return $this->_rightsibling;
	}

	/**
	 * Get the child categories.
	 *
	 * @return  mixed  An array of categories or false if an error occurs.
	 */
	public function &getChildren()
	{
		if (!is_object($this->_item))
		{
			$this->getCategory();
		}

		return $this->_children;
	}

	/**
	 * Increment the hit counter for the category.
	 *
	 * @param   int  $pk  Optional primary key of the category to increment.
	 *
	 * @return  boolean True if successful; false otherwise and internal error set.
	 */
	public function hit($pk = 0)
	{
		$input    = Factory::getApplication()->input;
		$hitcount = $input->getInt('hitcount', 1);

		if ($hitcount)
		{
			$pk    = (!empty($pk)) ? $pk : (int) $this->getState('category.id');
			$table = Table::getInstance('Category', 'JTable');
			$table->hit($pk);
		}

		return true;
	}
}