<?php
/**
 * @version		$Id: k2.php 1575 2012-05-09 12:09:32Z lefteris.kavadas $
 * @package		K2
 * @author		JoomlaWorks http://www.joomlaworks.net
 * @copyright	Copyright (c) 2006 - 2012 JoomlaWorks Ltd. All rights reserved.
 * @license		GNU/GPL license: http://www.gnu.org/copyleft/gpl.html
 */

defined('JPATH_BASE') or die ;

jimport('joomla.application.component.helper');

// Load the base adapter.
require_once JPATH_ADMINISTRATOR.'/components/com_finder/helpers/indexer/adapter.php';

class plgFinderK2 extends FinderIndexerAdapter
{

	protected $context = 'K2';

	protected $extension = 'com_k2';

	protected $layout = 'item';

	protected $type_title = 'K2 Item';

	protected $table = '#__k2_items';

	protected $state_field = 'published';

	public function __construct(&$subject, $config)
	{
		parent::__construct($subject, $config);
		$this->loadLanguage();
	}

	public function onFinderAfterDelete($context, $table)
	{
		if ($context == 'com_k2.item')
		{
			$id = $table->id;
		}
		elseif ($context == 'com_finder.index')
		{
			$id = $table->link_id;
		}
		else
		{
			return true;
		}
		// Remove the items.
		return $this->remove($id);
	}

	public function onFinderAfterSave($context, $row, $isNew)
	{
		// We only want to handle articles here
		if ($context == 'com_k2.item')
		{
			// 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_k2.category')
		{
			// Update the state
			$this->categoryStateChange(array($row->id), $row->published);

			// Check if the access levels are different
			if (!$isNew && $this->old_cataccess != $row->access)
			{
				$this->categoryAccessChange($row);
			}
		}

		return true;
	}

	public function onFinderBeforeSave($context, $row, $isNew)
	{
		// We only want to handle articles here
		if ($context == 'com_k2.item')
		{
			// 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 ($context == 'com_k2.category')
		{
			// Query the database for the old access level if the item isn't new
			if (!$isNew)
			{
				$this->checkCategoryAccess($row);
			}
		}

		return true;
	}

	public function onFinderChangeState($context, $pks, $value)
	{
		// Items
		if ($context == 'com_k2.item')
		{
			$this->itemStateChange($pks, $value);
		}
		// Categories
		if ($context == 'com_k2.category')
		{
			$this->categoryStateChange($pks, $value);
		}

	}

	protected function index(FinderIndexerResult $item, $format = 'html')
	{
		// Check if the extension is enabled
		if (JComponentHelper::isEnabled($this->extension) == false)
		{
			return;
		}

		// Initialize the item parameters.
		$registry = new JRegistry;
		$registry->loadString($item->params);
		$item->params = JComponentHelper::getParams('com_k2', true);
		$item->params->merge($registry);

		$registry = new JRegistry;
		$registry->loadString($item->metadata);
		$item->metadata = $registry;

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

		// Build the necessary route and path information.
		$item->url = $this->getURL($item->id, $this->extension, $this->layout);
		$item->route = K2HelperRoute::getItemRoute($item->slug, $item->catslug);
		$item->path = FinderIndexerHelper::getContentPath($item->route);

		// 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 meta-data processing instructions.
		$item->addInstruction(FinderIndexer::META_CONTEXT, 'metakey');
		$item->addInstruction(FinderIndexer::META_CONTEXT, 'metadesc');
		$item->addInstruction(FinderIndexer::META_CONTEXT, 'metaauthor');
		$item->addInstruction(FinderIndexer::META_CONTEXT, 'author');
		$item->addInstruction(FinderIndexer::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);

		// Translate the trash state. Articles should only be accesible if the category is accessible.
		if ($item->trash || $item->cat_trash)
		{
			$item->state = 0;
		}

		// Add the type taxonomy data.
		$item->addTaxonomy('Type', 'K2 Item');

		// 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);
		}

		// Add the category taxonomy data.
		$item->addTaxonomy('K2 Category', $item->category, $item->cat_state, $item->cat_access);

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

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

		// Index the item.
		FinderIndexer::index($item);
	}

	protected function setup()
	{
		// Load dependent classes.
		include_once JPATH_SITE.'/components/com_k2/helpers/route.php';

		return true;
	}

	protected function getListQuery($sql = null)
	{
		$db = JFactory::getDbo();
		// Check if we can use the supplied SQL query.
		$sql = is_a($sql, 'JDatabaseQuery') ? $sql : $db->getQuery(true);
		$sql->select('a.id, a.title, a.alias, a.introtext AS summary, a.fulltext AS body');
		$sql->select('a.published as state, a.catid, a.created AS start_date, a.created_by');
		$sql->select('a.created_by_alias, a.modified, a.modified_by, a.params');
		$sql->select('a.metakey, a.metadesc, a.metadata, a.language, a.access, a.ordering');
		$sql->select('a.publish_up AS publish_start_date, a.publish_down AS publish_end_date');
		$sql->select('a.trash, c.trash AS cat_trash');
		$sql->select('c.name 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 .= $sql->charLength('a.alias');
		$case_when_item_alias .= ' THEN ';
		$a_id = $sql->castAsChar('a.id');
		$case_when_item_alias .= $sql->concatenate(array($a_id, 'a.alias'), ':');
		$case_when_item_alias .= ' ELSE ';
		$case_when_item_alias .= $a_id.' END as slug';
		$sql->select($case_when_item_alias);

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

		$sql->select('u.name AS author');
		$sql->from('#__k2_items AS a');
		$sql->join('LEFT', '#__k2_categories AS c ON c.id = a.catid');
		$sql->join('LEFT', '#__users AS u ON u.id = a.created_by');

		return $sql;
	}

	protected function checkCategoryAccess($row)
	{
		$query = $this->db->getQuery(true);
		$query->select($this->db->quoteName('access'));
		$query->from($this->db->quoteName('#__k2_categories'));
		$query->where($this->db->quoteName('id').' = '.(int)$row->id);
		$this->db->setQuery($query);

		// Store the access level to determine if it changes
		$this->old_cataccess = $this->db->loadResult();
	}

	protected function categoryAccessChange($row)
	{
		$sql = clone($this->getStateQuery());
		$sql->where('c.id = '.(int)$row->id);

		// Get the access level.
		$this->db->setQuery($sql);
		$items = $this->db->loadObjectList();

		// Adjust the access level for each item within the category.
		foreach ($items as $item)
		{
			// Set the access level.
			$temp = max($item->access, $row->access);

			// Update the item.
			$this->change((int)$item->id, 'access', $temp);

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

}
