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<?php
/**
 * @package     Joomla.Site
 * @subpackage  com_contact
 *
 * @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\Contact\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\Model\ListModel;
use Joomla\CMS\Table\Table;
use Joomla\Database\ParameterType;
use Joomla\Registry\Registry;

/**
 * Single item model for a contact
 *
 * @package     Joomla.Site
 * @subpackage  com_contact
 * @since       1.5
 */
class CategoryModel extends ListModel
{
	/**
	 * Category item data
	 *
	 * @var    CategoryNode
	 */
	protected $_item = null;

/**
	 * Array of contacts 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 contact categories.
	 *
	 * @var    array
	 */
	protected $_categories = null;

/**
	 * Constructor.
	 *
	 * @param   array  $config  An optional associative array of configuration settings.
	 *
	 * @since   1.6
	 */
	public function __construct($config = array())
	{
		if (empty($config['filter_fields']))
		{
			$config['filter_fields'] = array(
				'id', 'a.id',
				'name', 'a.name',
				'con_position', 'a.con_position',
				'suburb', 'a.suburb',
				'state', 'a.state',
				'country', 'a.country',
				'ordering', 'a.ordering',
				'sortname',
				'sortname1', 'a.sortname1',
				'sortname2', 'a.sortname2',
				'sortname3', 'a.sortname3',
				'featuredordering', 'a.featured'
			);
		}

parent::__construct($config);
	}

/**
	 * 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();

if ($items === false)
		{
			return false;
		}

// Convert the params field into an object, saving original in _params
		for ($i = 0, $n = count($items); $i < $n; $i++)
		{
			$item = &$items[$i];

if (!isset($this->_params))
			{
				$item->params = new Registry($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))
			{
				$this->tags = new TagsHelper;
				$this->tags->getItemTags('com_contact.contact', $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);

$query->select($this->getState('list.select', 'a.*'))
			->select($this->getSlugColumn($query, 'a.id', 'a.alias') . ' AS slug')
			->select($this->getSlugColumn($query, 'c.id', 'c.alias') . ' AS catslug')
		/**
		 * TODO: we actually should be doing it but it's wrong this way
		 *	. ' CASE WHEN CHAR_LENGTH(a.alias) THEN CONCAT_WS(\':\', a.id, a.alias) ELSE a.id END as slug, '
		 *	. ' CASE WHEN CHAR_LENGTH(c.alias) THEN CONCAT_WS(\':\', c.id, c.alias) ELSE c.id END AS catslug ');
		 */
			->from($db->quoteName('#__contact_details', 'a'))
			->leftJoin($db->quoteName('#__categories', 'c') . ' ON c.id = a.catid')
			->whereIn($db->quoteName('a.access'), $groups);

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

// Join over the users for the author and modified_by names.
		$query->select("CASE WHEN a.created_by_alias > ' ' THEN a.created_by_alias ELSE ua.name END AS author")
			->select('ua.email AS author_email')
			->leftJoin($db->quoteName('#__users', 'ua') . ' ON ua.id = a.created_by')
			->leftJoin($db->quoteName('#__users', 'uam') . ' ON uam.id = a.modified_by');

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

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

// Filter by start and end dates.
		$nowDate = Factory::getDate()->toSql();

if ($this->getState('filter.publish_date'))
		{
			$query->where('(' . $db->quoteName('a.publish_up')
				. ' IS NULL OR ' . $db->quoteName('a.publish_up') . ' <= :publish_up)'
			)
				->where('(' . $db->quoteName('a.publish_down')
					. ' IS NULL OR ' . $db->quoteName('a.publish_down') . ' >= :publish_down)'
				)
				->bind(':publish_up', $nowDate)
				->bind(':publish_down', $nowDate);
		}

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

if (!empty($search))
		{
			$search = '%' . trim($search) . '%';
			$query->where($db->quoteName('a.name') . ' LIKE :name ');
			$query->bind(':name', $search);
		}

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

// Set sortname ordering if selected
		if ($this->getState('list.ordering') === 'sortname')
		{
			$query->order($db->escape('a.sortname1') . ' ' . $db->escape($this->getState('list.direction', 'ASC')))
				->order($db->escape('a.sortname2') . ' ' . $db->escape($this->getState('list.direction', 'ASC')))
				->order($db->escape('a.sortname3') . ' ' . $db->escape($this->getState('list.direction', 'ASC')));
		}
		elseif ($this->getState('list.ordering') === 'featuredordering')
		{
			$query->order($db->escape('a.featured') . ' DESC')
				->order($db->escape('a.ordering') . ' ASC');
		}
		else
		{
			$query->order($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  $direction  An optional direction (asc|desc).
	 *
	 * @return  void
	 *
	 * @since   1.6
	 */
	protected function populateState($ordering = null, $direction = null)
	{
		$app = Factory::getApplication();
		$params = ComponentHelper::getParams('com_contact');

// Get list ordering default from the parameters
		if ($menu = $app->getMenu()->getActive())
		{
			$menuParams = $menu->getParams();
		}
		else
		{
			$menuParams = new Registry;
		}

$mergedParams = clone $params;
		$mergedParams->merge($menuParams);

// List state information
		$format = $app->input->getWord('format');

if ($format === 'feed')
		{
			$limit = $app->get('feed_limit');
		}
		else
		{
			$limit = $app->getUserStateFromRequest(
				'com_contact.category.list',
				'limit',
				$mergedParams->get('contacts_display_num', $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
		$itemid = $app->input->get('Itemid', 0, 'int');
		$search = $app->getUserStateFromRequest('com_contact.category.list.' . $itemid . '.filter-search', 'filter-search', '', 'string');
		$this->setState('list.filter', $search);

$orderCol = $app->input->get('filter_order', $mergedParams->get('initial_sort', '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 ((!$user->authorise('core.edit.state', 'com_contact')) && (!$user->authorise('core.edit', 'com_contact')))
		{
			// 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  The category 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('Contact', $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;
	}

/**
	 * Generate column expression for slug or catslug.
	 *
	 * @param   \JDatabaseQuery  $query  Current query instance.
	 * @param   string           $id     Column id name.
	 * @param   string           $alias  Column alias name.
	 *
	 * @return  string
	 *
	 * @since   4.0.0
	 */
	private function getSlugColumn($query, $id, $alias)
	{
		return 'CASE WHEN '
			. $query->charLength($alias, '!=', '0')
			. ' THEN '
			. $query->concatenate(array($query->castAsChar($id), $alias), ':')
			. ' ELSE '
			. $query->castAsChar($id) . ' END';
	}

/**
	 * Increment the hit counter for the category.
	 *
	 * @param   integer  $pk  Optional primary key of the category to increment.
	 *
	 * @return  boolean  True if successful; false otherwise and internal error set.
	 *
	 * @since   3.2
	 */
	public function hit($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');
			$table->hit($pk);
		}

return true;
	}
}