<?php
/**
 * @version    2.9.x
 * @package    K2
 * @author     JoomlaWorks https://www.joomlaworks.net
 * @copyright  Copyright (c) 2006 - 2018 JoomlaWorks Ltd. All rights reserved.
 * @license    GNU/GPL license: http://www.gnu.org/copyleft/gpl.html
 */

// no direct access
defined('_JEXEC') or die;

jimport('joomla.plugin.plugin');
jimport('joomla.html.parameter');

class plgSearchK2 extends JPlugin
{
    public function onContentSearchAreas()
    {
        return $this->onSearchAreas();
    }

    public function onContentSearch($text, $phrase = '', $ordering = '', $areas = null)
    {
        return $this->onSearch($text, $phrase, $ordering, $areas);
    }

    public function onSearchAreas()
    {
        JPlugin::loadLanguage('plg_search_k2', JPATH_ADMINISTRATOR);
        static $areas = array('k2' => 'K2_ITEMS');
        return $areas;
    }

    public function onSearch($text, $phrase = '', $ordering = '', $areas = null)
    {
        JPlugin::loadLanguage('plg_search_k2', JPATH_ADMINISTRATOR);
        jimport('joomla.html.parameter');
        $application = JFactory::getApplication();
        $db = JFactory::getDbo();
        $jnow = JFactory::getDate();
        $now = K2_JVERSION == '15' ? $jnow->toMySQL() : $jnow->toSql();

        $nullDate = $db->getNullDate();
        $user = JFactory::getUser();
        if (K2_JVERSION != '15') {
            $accessCheck = " IN(".implode(',', $user->getAuthorisedViewLevels()).") ";
        } else {
            $aid = $user->get('aid');
            $accessCheck = " <= {$aid} ";
        }
        $tagIDs = array();
        $itemIDs = array();

        require_once(JPATH_SITE.'/administrator/components/com_search/helpers/search.php');
        require_once(JPATH_SITE.'/components/com_k2/helpers/route.php');

        $searchText = $text;
        if (is_array($areas)) {
            if (!array_intersect($areas, array_keys($this->onSearchAreas()))) {
                return array();
            }
        }

        $plugin = JPluginHelper::getPlugin('search', 'k2');
        $pluginParams = class_exists('JParameter') ? new JParameter($plugin->params) : new JRegistry($plugin->params);

        $limit = $pluginParams->def('search_limit', 50);

        $text = JString::trim($text);
        if ($text == '') {
            return array();
        }

        $rows = array();

        if ($limit > 0) {
            if ($pluginParams->get('search_tags')) {
                $tagQuery = JString::strtolower($text);
                $escaped = K2_JVERSION == '15' ? $db->getEscaped($tagQuery, true) : $db->escape($tagQuery, true);
                $quoted = $db->Quote('%'.$escaped.'%', false);
                $query = "SELECT id FROM #__k2_tags WHERE LOWER(name) LIKE ".$quoted." AND published=1";
                $db->setQuery($query);
                $tagIDs = K2_JVERSION == '30' ? $db->loadColumn() : $db->loadResultArray();

                if (count($tagIDs)) {
                    JArrayHelper::toInteger($tagIDs);
                    $query = "SELECT itemID FROM #__k2_tags_xref WHERE tagID IN (".implode(',', $tagIDs).")";
                    $db->setQuery($query);
                    $itemIDs = K2_JVERSION == '30' ? $db->loadColumn() : $db->loadResultArray();
                }
            }
            if ($phrase == 'exact') {
                $text = JString::trim($text, '"');
                $escaped = K2_JVERSION == '15' ? $db->getEscaped($text, true) : $db->escape($text, true);
                $quoted = $db->Quote($escaped);
                $where = " ( LOWER(i.title) = ".$quoted." OR LOWER(i.introtext) = ".$quoted." OR LOWER(i.`fulltext`) = ".$quoted." OR LOWER(i.extra_fields_search) = ".$quoted." OR LOWER(i.image_caption) = ".$quoted." OR LOWER(i.image_credits) = ".$quoted." OR LOWER(i.video_caption) = ".$quoted." OR LOWER(i.video_credits) = ".$quoted." OR LOWER(i.metadesc) = ".$quoted." OR LOWER(i.metakey) = ".$quoted.") ";
            } else {
                $words = explode(' ', $text);
                $wheres = array();

                foreach ($words as $word) {
                    $escaped = K2_JVERSION == '15' ? $db->getEscaped($word, true) : $db->escape($word, true);
                    $quoted = $db->Quote('%'.$escaped.'%', false);
                    $wheres2 = array();
                    $wheres2[] = "LOWER(i.title) LIKE ".$quoted;
                    $wheres2[] = "LOWER(i.introtext) LIKE ".$quoted;
                    $wheres2[] = "LOWER(i.`fulltext`) LIKE ".$quoted;
                    $wheres2[] = "LOWER(i.extra_fields_search) LIKE ".$quoted;
                    $wheres2[] = "LOWER(i.image_caption) LIKE ".$quoted;
                    $wheres2[] = "LOWER(i.image_credits) LIKE ".$quoted;
                    $wheres2[] = "LOWER(i.video_caption) LIKE ".$quoted;
                    $wheres2[] = "LOWER(i.video_credits) LIKE ".$quoted;
                    $wheres2[] = "LOWER(i.metadesc) LIKE ".$quoted;
                    $wheres2[] = "LOWER(i.metakey) LIKE ".$quoted;
                    $wheres[] = implode(' OR ', $wheres2);
                }
                $where = '(' . implode(($phrase == 'all' ? ') AND (' : ') OR ('), $wheres) . ')';
            }

            if ($pluginParams->get('search_tags') && count($itemIDs)) {
                JArrayHelper::toInteger($itemIDs);
                $where .= " OR i.id IN (".implode(',', $itemIDs).")";
            }
            $query = "
				SELECT i.title AS title,
			    i.metadesc,
			    i.metakey,
			    c.name as section,
			    i.image_caption,
			    i.image_credits,
			    i.video_caption,
			    i.video_credits,
			    i.extra_fields_search,
			    i.created,
		    	CONCAT(i.introtext, i.fulltext) AS text,
		    	CASE WHEN CHAR_LENGTH(i.alias) THEN CONCAT_WS(':', i.id, i.alias) ELSE i.id END as slug,
		    	CASE WHEN CHAR_LENGTH(c.alias) THEN CONCAT_WS(':', c.id, c.alias) ELSE c.id END as catslug
		    	FROM #__k2_items AS i
		    	INNER JOIN #__k2_categories AS c ON c.id=i.catid AND c.access {$accessCheck}
				WHERE {$where}
				AND i.trash = 0
				AND i.published = 1
				AND i.access {$accessCheck}
				AND c.published = 1
				AND c.access {$accessCheck}
				AND c.trash = 0
				AND ( i.publish_up = ".$db->Quote($nullDate)." OR i.publish_up <= ".$db->Quote($now)." )
				AND ( i.publish_down = ".$db->Quote($nullDate)." OR i.publish_down >= ".$db->Quote($now)." )";

            if (K2_JVERSION != '15' && $application->isSite() && $application->getLanguageFilter()) {
                $languageTag = JFactory::getLanguage()->getTag();
                $query .= " AND c.language IN (".$db->Quote($languageTag).", ".$db->Quote('*').") AND i.language IN (".$db->Quote($languageTag).", ".$db->Quote('*').") ";
            }
            $query .= " GROUP BY i.id ";

            switch ($ordering) {
                case 'oldest':
                    $query .= 'ORDER BY i.created ASC';
                    break;

                case 'popular':
                    $query .= 'ORDER BY i.hits DESC';
                    break;

                case 'alpha':
                    $query .= 'ORDER BY i.title ASC';
                    break;

                case 'category':
                    $query .= 'ORDER BY c.name ASC, i.title ASC';
                    break;

                case 'newest':
                default:
                    $query .= 'ORDER BY i.created DESC';
                    break;
            }

            $db->setQuery($query, 0, $limit);
            $list = $db->loadObjectList();
            $limit -= count($list);
            if (isset($list)) {
                foreach ($list as $key => $item) {
                    $list[$key]->href = JRoute::_(K2HelperRoute::getItemRoute($item->slug, $item->catslug));
                }
            }
            $rows[] = $list;
        }

        $results = array();
        if (count($rows)) {
            foreach ($rows as $row) {
                $new_row = array();
                foreach ($row as $key => $item) {
                    $item->browsernav = '';
                    $item->tag = $searchText;
                    if (searchHelper::checkNoHTML($item, $searchText, array('text', 'title', 'metakey', 'metadesc', 'section', 'image_caption', 'image_credits', 'video_caption', 'video_credits', 'extra_fields_search', 'tag'))) {
                        $new_row[] = $item;
                    }
                }
                $results = array_merge($results, (array)$new_row);
            }
        }

        return $results;
    }
}
