<?php
/**
 * @package     Joomla.Administrator
 * @subpackage  com_tags
 *
 * @copyright   (C) 2013 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Tags\Administrator\Model;

\defined('_JEXEC') or die;

use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\MVC\Factory\MVCFactoryInterface;
use Joomla\CMS\MVC\Model\ListModel;
use Joomla\CMS\Tag\TagServiceInterface;
use Joomla\Database\DatabaseQuery;
use Joomla\Database\ParameterType;

/**
 * Tags Component Tags Model
 *
 * @since  3.1
 */
class TagsModel extends ListModel
{
	/**
	 * Constructor.
	 *
	 * @param   MVCFactoryInterface  $factory  The factory.
	 *
	 * @param   array                $config   An optional associative array of configuration settings.
	 *
	 * @since   1.6
	 */
	public function __construct($config = array(), MVCFactoryInterface $factory = null)
	{
		if (empty($config['filter_fields']))
		{
			$config['filter_fields'] = array(
				'id',
				'a.id',
				'title',
				'a.title',
				'alias',
				'a.alias',
				'published',
				'a.published',
				'access',
				'a.access',
				'access_level',
				'language',
				'a.language',
				'checked_out',
				'a.checked_out',
				'checked_out_time',
				'a.checked_out_time',
				'created_time',
				'a.created_time',
				'created_user_id',
				'a.created_user_id',
				'lft',
				'a.lft',
				'rgt',
				'a.rgt',
				'level',
				'a.level',
				'path',
				'a.path',
				'countTaggedItems',
			);
		}

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

	/**
	 * 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  $direction  An optional direction (asc|desc).
	 *
	 * @return    void
	 *
	 * @since    3.1
	 */
	protected function populateState($ordering = 'a.lft', $direction = 'asc')
	{
		$extension = $this->getUserStateFromRequest($this->context . '.filter.extension', 'extension', 'com_content', 'cmd');

		$this->setState('filter.extension', $extension);
		$parts = explode('.', $extension);

		// Extract the component name
		$this->setState('filter.component', $parts[0]);

		// Extract the optional section name
		$this->setState('filter.section', (count($parts) > 1) ? $parts[1] : null);

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

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

	/**
	 * 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  $id  A prefix for the store id.
	 *
	 * @return  string  A store id.
	 *
	 * @since   3.1
	 */
	protected function getStoreId($id = '')
	{
		// Compile the store id.
		$id .= ':' . $this->getState('filter.extension');
		$id .= ':' . $this->getState('filter.search');
		$id .= ':' . $this->getState('filter.level');
		$id .= ':' . $this->getState('filter.access');
		$id .= ':' . $this->getState('filter.published');
		$id .= ':' . $this->getState('filter.language');

		return parent::getStoreId($id);
	}

	/**
	 * Method to create a query for a list of items.
	 *
	 * @return  string
	 *
	 * @since  3.1
	 */
	protected function getListQuery()
	{
		// Create a new query object.
		$db    = $this->getDbo();
		$query = $db->getQuery(true);
		$user  = Factory::getUser();

		// Select the required fields from the table.
		$query->select(
			$this->getState(
				'list.select',
				'a.id, a.title, a.alias, a.note, a.published, a.access, a.description' .
				', a.checked_out, a.checked_out_time, a.created_user_id' .
				', a.path, a.parent_id, a.level, a.lft, a.rgt' .
				', a.language'
			)
		);
		$query->from($db->quoteName('#__tags', 'a'))
			->where($db->quoteName('a.alias') . ' <> ' . $db->quote('root'));

		// Join over the language
		$query->select(
			[
				$db->quoteName('l.title', 'language_title'),
				$db->quoteName('l.image', 'language_image'),
			]
		)
			->join('LEFT', $db->quoteName('#__languages', 'l'), $db->quoteName('l.lang_code') . ' = ' . $db->quoteName('a.language'));

		// Join over the users for the checked out user.
		$query->select($db->quoteName('uc.name', 'editor'))
			->join('LEFT', $db->quoteName('#__users', 'uc'), $db->quoteName('uc.id') . ' = ' . $db->quoteName('a.checked_out'));

		// Join over the users for the author.
		$query->select($db->quoteName('ua.name', 'author_name'))
			->join('LEFT', $db->quoteName('#__users', 'ua'), $db->quoteName('ua.id') . ' = ' . $db->quoteName('a.created_user_id'))
			->select($db->quoteName('ug.title', 'access_title'))
			->join('LEFT', $db->quoteName('#__viewlevels', 'ug'), $db->quoteName('ug.id') . ' = ' . $db->quoteName('a.access'));

		// Count Items
		$subQueryCountTaggedItems = $db->getQuery(true);
		$subQueryCountTaggedItems
			->select('COUNT(' . $db->quoteName('tag_map.content_item_id') . ')')
			->from($db->quoteName('#__contentitem_tag_map', 'tag_map'))
			->where($db->quoteName('tag_map.tag_id') . ' = ' . $db->quoteName('a.id'));
		$query->select('(' . (string) $subQueryCountTaggedItems . ') AS ' . $db->quoteName('countTaggedItems'));

		// Filter on the level.
		if ($level = (int) $this->getState('filter.level'))
		{
			$query->where($db->quoteName('a.level') . ' <= :level')
				->bind(':level', $level, ParameterType::INTEGER);
		}

		// Filter by access level.
		if ($access = (int) $this->getState('filter.access'))
		{
			$query->where($db->quoteName('a.access') . ' = :access')
				->bind(':access', $access, ParameterType::INTEGER);
		}

		// Implement View Level Access
		if (!$user->authorise('core.admin'))
		{
			$groups = $user->getAuthorisedViewLevels();
			$query->whereIn($db->quoteName('a.access'), $groups);
		}

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

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

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

		if (!empty($search))
		{
			if (stripos($search, 'id:') === 0)
			{
				$ids = (int) substr($search, 3);
				$query->where($db->quoteName('a.id') . ' = :id')
					->bind(':id', $ids, ParameterType::INTEGER);
			}
			else
			{
				$search = '%' . str_replace(' ', '%', trim($search)) . '%';
				$query->extendWhere(
					'AND',
					[
						$db->quoteName('a.title') . ' LIKE :title',
						$db->quoteName('a.alias') . ' LIKE :alias',
						$db->quoteName('a.note') . ' LIKE :note',

					],
					'OR'
				);
				$query->bind(':title', $search)
					->bind(':alias', $search)
					->bind(':note', $search);
			}
		}

		// Filter on the language.
		if ($language = $this->getState('filter.language'))
		{
			$query->where($db->quoteName('a.language') . ' = :language')
				->bind(':language', $language);
		}

		// Add the list ordering clause
		$listOrdering = $this->getState('list.ordering', 'a.lft');
		$listDirn     = $db->escape($this->getState('list.direction', 'ASC'));

		if ($listOrdering == 'a.access')
		{
			$query->order('a.access ' . $listDirn . ', a.lft ' . $listDirn);
		}
		else
		{
			$query->order($db->escape($listOrdering) . ' ' . $listDirn);
		}

		return $query;
	}

	/**
	 * Method to get an array of data items.
	 *
	 * @return  mixed  An array of data items on success, false on failure.
	 *
	 * @since   3.0.1
	 */
	public function getItems()
	{
		$items = parent::getItems();

		if ($items != false)
		{
			$extension = $this->getState('filter.extension');

			$this->countItems($items, $extension);
		}

		return $items;
	}

	/**
	 * Method to load the countItems method from the extensions
	 *
	 * @param   \stdClass[]  &$items      The category items
	 * @param   string        $extension  The category extension
	 *
	 * @return  void
	 *
	 * @since   3.5
	 */
	public function countItems(&$items, $extension)
	{
		$parts = explode('.', $extension);

		if (count($parts) < 2)
		{
			return;
		}

		$component = Factory::getApplication()->bootComponent($parts[0]);

		if ($component instanceof TagServiceInterface)
		{
			$component->countTagItems($items, $extension);
		}
	}

	/**
	 * Manipulate the query to be used to evaluate if this is an Empty State to provide specific conditions for this extension.
	 *
	 * @return DatabaseQuery
	 *
	 * @since 4.0.0
	 */
	protected function getEmptyStateQuery()
	{
		$query = parent::getEmptyStateQuery();

		$query->where($this->_db->quoteName('alias') . ' != ' . $this->_db->quote('root'));

		return $query;
	}
}
