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<?php
/**
 * @package     Joomla.Plugin
 * @subpackage  Finder.Categories
 *
 * @copyright   (C) 2011 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\Component\ComponentHelper;
use Joomla\CMS\Table\Table;
use Joomla\Component\Finder\Administrator\Indexer\Adapter;
use Joomla\Component\Finder\Administrator\Indexer\Helper;
use Joomla\Component\Finder\Administrator\Indexer\Indexer;
use Joomla\Component\Finder\Administrator\Indexer\Result;
use Joomla\Database\DatabaseQuery;
use Joomla\Database\ParameterType;
use Joomla\Registry\Registry;

/**
 * Smart Search adapter for Joomla Categories.
 *
 * @since  2.5
 */
class PlgFinderCategories extends Adapter
{
	/**
	 * The plugin identifier.
	 *
	 * @var    string
	 * @since  2.5
	 */
	protected $context = 'Categories';

/**
	 * The extension name.
	 *
	 * @var    string
	 * @since  2.5
	 */
	protected $extension = 'com_categories';

/**
	 * The sublayout to use when rendering the results.
	 *
	 * @var    string
	 * @since  2.5
	 */
	protected $layout = 'category';

/**
	 * The type of content that the adapter indexes.
	 *
	 * @var    string
	 * @since  2.5
	 */
	protected $type_title = 'Category';

/**
	 * The table name.
	 *
	 * @var    string
	 * @since  2.5
	 */
	protected $table = '#__categories';

/**
	 * The field the published state is stored in.
	 *
	 * @var    string
	 * @since  2.5
	 */
	protected $state_field = 'published';

/**
	 * Load the language file on instantiation.
	 *
	 * @var    boolean
	 * @since  3.1
	 */
	protected $autoloadLanguage = true;

/**
	 * Method to setup the indexer to be run.
	 *
	 * @return  boolean  True on success.
	 *
	 * @since   2.5
	 */
	protected function setup()
	{
		return true;
	}

/**
	 * Method to remove the link information for items that have been deleted.
	 *
	 * @param   string  $context  The context of the action being performed.
	 * @param   Table   $table    A Table object containing the record to be deleted
	 *
	 * @return  boolean  True on success.
	 *
	 * @since   2.5
	 * @throws  Exception on database error.
	 */
	public function onFinderDelete($context, $table)
	{
		if ($context === 'com_categories.category')
		{
			$id = $table->id;
		}
		elseif ($context === 'com_finder.index')
		{
			$id = $table->link_id;
		}
		else
		{
			return true;
		}

// Remove item from the index.
		return $this->remove($id);
	}

/**
	 * Smart Search after save content method.
	 * Reindexes the link information for a category that has been saved.
	 * It also makes adjustments if the access level of the category has changed.
	 *
	 * @param   string   $context  The context of the category passed to the plugin.
	 * @param   Table    $row      A Table object.
	 * @param   boolean  $isNew    True if the category has just been created.
	 *
	 * @return  void
	 *
	 * @since   2.5
	 * @throws  Exception on database error.
	 */
	public function onFinderAfterSave($context, $row, $isNew): void
	{
		// We only want to handle categories here.
		if ($context === 'com_categories.category')
		{
			// Check if the access levels are different.
			if (!$isNew && $this->old_access != $row->access)
			{
				// Process the change.
				$this->itemAccessChange($row);
			}

// Reindex the category item.
			$this->reindex($row->id);

// Check if the parent access level is different.
			if (!$isNew && $this->old_cataccess != $row->access)
			{
				$this->categoryAccessChange($row);
			}
		}
	}

/**
	 * Smart Search before content save method.
	 * This event is fired before the data is actually saved.
	 *
	 * @param   string   $context  The context of the category passed to the plugin.
	 * @param   Table    $row      A Table object.
	 * @param   boolean  $isNew    True if the category is just about to be created.
	 *
	 * @return  boolean  True on success.
	 *
	 * @since   2.5
	 * @throws  Exception on database error.
	 */
	public function onFinderBeforeSave($context, $row, $isNew)
	{
		// We only want to handle categories here.
		if ($context === 'com_categories.category')
		{
			// Query the database for the old access level and the parent if the item isn't new.
			if (!$isNew)
			{
				$this->checkItemAccess($row);
				$this->checkCategoryAccess($row);
			}
		}

return true;
	}

/**
	 * Method to update the link information for items that have been changed
	 * from outside the edit screen. This is fired when the item is published,
	 * unpublished, archived, or unarchived from the list view.
	 *
	 * @param   string   $context  The context for the category passed to the plugin.
	 * @param   array    $pks      An array of primary key ids of the category that has changed state.
	 * @param   integer  $value    The value of the state that the category has been changed to.
	 *
	 * @return  void
	 *
	 * @since   2.5
	 */
	public function onFinderChangeState($context, $pks, $value)
	{
		// We only want to handle categories here.
		if ($context === 'com_categories.category')
		{
			/*
			 * The category published state is tied to the parent category
			 * published state so we need to look up all published states
			 * before we change anything.
			 */
			foreach ($pks as $pk)
			{
				$pk    = (int) $pk;
				$query = clone $this->getStateQuery();

$query->where($this->db->quoteName('a.id') . ' = :plgFinderCategoriesId')
					->bind(':plgFinderCategoriesId', $pk, ParameterType::INTEGER);

$this->db->setQuery($query);
				$item = $this->db->loadObject();

// Translate the state.
				$state = null;

if ($item->parent_id != 1)
				{
					$state = $item->cat_state;
				}

$temp = $this->translateState($value, $state);

// Update the item.
				$this->change($pk, 'state', $temp);

// Reindex the item.
				$this->reindex($pk);
			}
		}

// Handle when the plugin is disabled.
		if ($context === 'com_plugins.plugin' && $value === 0)
		{
			$this->pluginDisable($pks);
		}
	}

/**
	 * Method to index an item. The item must be a Result object.
	 *
	 * @param   Result  $item  The item to index as a Result object.
	 *
	 * @return  void
	 *
	 * @since   2.5
	 * @throws  Exception on database error.
	 */
	protected function index(Result $item)
	{
		// Check if the extension is enabled.
		if (ComponentHelper::isEnabled($this->extension) === false)
		{
			return;
		}

// Extract the extension element
		$parts = explode('.', $item->extension);
		$extension_element = $parts[0];

// Check if the extension that owns the category is also enabled.
		if (ComponentHelper::isEnabled($extension_element) === false)
		{
			return;
		}

$item->setLanguage();

$extension = ucfirst(substr($extension_element, 4));

// Initialize the item parameters.
		$item->params = new Registry($item->params);

$item->metadata = new Registry($item->metadata);

/*
		 * Add the metadata processing instructions based on the category's
		 * configuration parameters.
		 */

// Add the meta author.
		$item->metaauthor = $item->metadata->get('author');

// Handle the link to the metadata.
		$item->addInstruction(Indexer::META_CONTEXT, 'link');
		$item->addInstruction(Indexer::META_CONTEXT, 'metakey');
		$item->addInstruction(Indexer::META_CONTEXT, 'metadesc');
		$item->addInstruction(Indexer::META_CONTEXT, 'metaauthor');
		$item->addInstruction(Indexer::META_CONTEXT, 'author');

// Deactivated Methods
		// $item->addInstruction(Indexer::META_CONTEXT, 'created_by_alias');

// Trigger the onContentPrepare event.
		$item->summary = Helper::prepareContent($item->summary, $item->params);

// Create a URL as identifier to recognise items again.
		$item->url = $this->getUrl($item->id, $item->extension, $this->layout);

/*
		 * Build the necessary route information.
		 * Need to import component route helpers dynamically, hence the reason it's handled here.
		 */
		$class = $extension . 'HelperRoute';

// Need to import component route helpers dynamically, hence the reason it's handled here.
		JLoader::register($class, JPATH_SITE . '/components/' . $extension_element . '/helpers/route.php');

if (class_exists($class) && method_exists($class, 'getCategoryRoute'))
		{
			$item->route = $class::getCategoryRoute($item->id, $item->language);
		}
		else
		{
			$class = 'Joomla\\Component\\' . $extension . '\\Site\\Helper\\RouteHelper';

if (class_exists($class) && method_exists($class, 'getCategoryRoute'))
			{
				$item->route = $class::getCategoryRoute($item->id, $item->language);
			}
			else
			{
				// This category has no frontend route.
				return;
			}
		}

// Get the menu title if it exists.
		$title = $this->getItemMenuTitle($item->url);

// Adjust the title if necessary.
		if (!empty($title) && $this->params->get('use_menu_title', true))
		{
			$item->title = $title;
		}

// Translate the state. Categories should only be published if the parent category is published.
		$item->state = $this->translateState($item->state);

// Add the type taxonomy data.
		$item->addTaxonomy('Type', 'Category');

// Add the language taxonomy data.
		$item->addTaxonomy('Language', $item->language);

// Get content extras.
		Helper::getContentExtras($item);

// Index the item.
		$this->indexer->index($item);
	}

/**
	 * Method to get the SQL query used to retrieve the list of content items.
	 *
	 * @param   mixed  $query  A DatabaseQuery object or null.
	 *
	 * @return  DatabaseQuery  A database object.
	 *
	 * @since   2.5
	 */
	protected function getListQuery($query = null)
	{
		$db = $this->db;

// Check if we can use the supplied SQL query.
		$query = $query instanceof DatabaseQuery ? $query : $db->getQuery(true);

$query->select(
			$db->quoteName(
				[
					'a.id',
					'a.title',
					'a.alias',
					'a.extension',
					'a.metakey',
					'a.metadesc',
					'a.metadata',
					'a.language',
					'a.lft',
					'a.parent_id',
					'a.level',
					'a.access',
					'a.params',
				]
			)
		)
			->select(
				$db->quoteName(
					[
						'a.description',
						'a.created_user_id',
						'a.modified_time',
						'a.modified_user_id',
						'a.created_time',
						'a.published',
					],
					[
						'summary',
						'created_by',
						'modified',
						'modified_by',
						'start_date',
						'state',
					]
				)
			);

// Handle the alias CASE WHEN portion of the query.
		$case_when_item_alias = ' CASE WHEN ';
		$case_when_item_alias .= $query->charLength($db->quoteName('a.alias'), '!=', '0');
		$case_when_item_alias .= ' THEN ';
		$a_id = $query->castAsChar($db->quoteName('a.id'));
		$case_when_item_alias .= $query->concatenate([$a_id, 'a.alias'], ':');
		$case_when_item_alias .= ' ELSE ';
		$case_when_item_alias .= $a_id . ' END AS slug';

$query->select($case_when_item_alias)
			->from($db->quoteName('#__categories', 'a'))
			->where($db->quoteName('a.id') . ' > 1');

return $query;
	}

/**
	 * Method to get a SQL query to load the published and access states for
	 * a category and its parents.
	 *
	 * @return  DatabaseQuery  A database object.
	 *
	 * @since   2.5
	 */
	protected function getStateQuery()
	{
		$query = $this->db->getQuery(true);

$query->select(
			$this->db->quoteName(
				[
					'a.id',
					'a.parent_id',
					'a.access',
				]
			)
		)
			->select(
				$this->db->quoteName(
					[
						'a.' . $this->state_field,
						'c.published',
						'c.access',
					],
					[
						'state',
						'cat_state',
						'cat_access',
					]
				)
			)
			->from($this->db->quoteName('#__categories', 'a'))
			->join(
				'INNER',
				$this->db->quoteName('#__categories', 'c'),
				$this->db->quoteName('c.id') . ' = ' . $this->db->quoteName('a.parent_id')
			);

return $query;
	}
}