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<?php
/**
 * @package     Joomla.Plugin
 * @subpackage  Finder.Content
 *
 * @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\Categories\Categories;
use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Table\Table;
use Joomla\Component\Content\Site\Helper\RouteHelper;
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\Registry\Registry;

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

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

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

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

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

/**
	 * 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 update the item link information when the item category is
	 * changed. This is fired when the item category is published or unpublished
	 * from the list view.
	 *
	 * @param   string   $extension  The extension whose category has been updated.
	 * @param   array    $pks        A list of primary key ids of the content that has changed state.
	 * @param   integer  $value      The value of the state that the content has been changed to.
	 *
	 * @return  void
	 *
	 * @since   2.5
	 */
	public function onFinderCategoryChangeState($extension, $pks, $value)
	{
		// Make sure we're handling com_content categories.
		if ($extension === 'com_content')
		{
			$this->categoryStateChange($pks, $value);
		}
	}

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

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

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

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

// Check for access changes in the category.
		if ($context === 'com_categories.category')
		{
			// Check if the access levels are different.
			if (!$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 content passed to the plugin.
	 * @param   Table    $row      A Table object.
	 * @param   boolean  $isNew    If the content is just about to be created.
	 *
	 * @return  boolean  True on success.
	 *
	 * @since   2.5
	 * @throws  Exception on database error.
	 */
	public function onFinderBeforeSave($context, $row, $isNew)
	{
		// We only want to handle articles here.
		if ($context === 'com_content.article' || $context === 'com_content.form')
		{
			// Query the database for the old access level if the item isn't new.
			if (!$isNew)
			{
				$this->checkItemAccess($row);
			}
		}

// Check for access levels from the category.
		if ($context === 'com_categories.category')
		{
			// Query the database for the old access level if the item isn't new.
			if (!$isNew)
			{
				$this->checkCategoryAccess($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 content passed to the plugin.
	 * @param   array    $pks      An array of primary key ids of the content that has changed state.
	 * @param   integer  $value    The value of the state that the content has been changed to.
	 *
	 * @return  void
	 *
	 * @since   2.5
	 */
	public function onFinderChangeState($context, $pks, $value)
	{
		// We only want to handle articles here.
		if ($context === 'com_content.article' || $context === 'com_content.form')
		{
			$this->itemStateChange($pks, $value);
		}

// 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)
	{
		$item->setLanguage();

// Check if the extension is enabled.
		if (ComponentHelper::isEnabled($this->extension) === false)
		{
			return;
		}

$item->context = 'com_content.article';

// Initialise the item parameters.
		$registry = new Registry($item->params);
		$item->params = ComponentHelper::getParams('com_content', true);
		$item->params->merge($registry);

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

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

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

// Build the necessary route and path information.
		$item->route = RouteHelper::getArticleRoute($item->slug, $item->catid, $item->language);

// 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;
		}

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

// Add the metadata processing instructions.
		$item->addInstruction(Indexer::META_CONTEXT, 'metakey');
		$item->addInstruction(Indexer::META_CONTEXT, 'metadesc');
		$item->addInstruction(Indexer::META_CONTEXT, 'metaauthor');
		$item->addInstruction(Indexer::META_CONTEXT, 'author');
		$item->addInstruction(Indexer::META_CONTEXT, 'created_by_alias');

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

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

// Add the author taxonomy data.
		if (!empty($item->author) || !empty($item->created_by_alias))
		{
			$item->addTaxonomy('Author', !empty($item->created_by_alias) ? $item->created_by_alias : $item->author, $item->state);
		}

// Add the category taxonomy data.
		$categories = Categories::getInstance('com_content', ['published' => false, 'access' => false]);
		$category = $categories->get($item->catid);
		$item->addNestedTaxonomy('Category', $category, $this->translateState($category->published), $category->access, $category->language);

// 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)
			->select('a.id, a.title, a.alias, a.introtext AS summary, a.fulltext AS body')
			->select('a.images')
			->select('a.state, a.catid, a.created AS start_date, a.created_by')
			->select('a.created_by_alias, a.modified, a.modified_by, a.attribs AS params')
			->select('a.metakey, a.metadesc, a.metadata, a.language, a.access, a.version, a.ordering')
			->select('a.publish_up AS publish_start_date, a.publish_down AS publish_end_date')
			->select('c.title AS category, c.published AS cat_state, c.access AS cat_access');

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

$case_when_category_alias = ' CASE WHEN ';
		$case_when_category_alias .= $query->charLength('c.alias', '!=', '0');
		$case_when_category_alias .= ' THEN ';
		$c_id = $query->castAsChar('c.id');
		$case_when_category_alias .= $query->concatenate(array($c_id, 'c.alias'), ':');
		$case_when_category_alias .= ' ELSE ';
		$case_when_category_alias .= $c_id . ' END as catslug';
		$query->select($case_when_category_alias)

->select('u.name AS author')
			->from('#__content AS a')
			->join('LEFT', '#__categories AS c ON c.id = a.catid')
			->join('LEFT', '#__users AS u ON u.id = a.created_by');

return $query;
	}
}