class.ilLuceneSearchGUI.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2006 ILIAS open source, University of Cologne            |
        |                                                                             |
        | This program is free software; you can redistribute it and/or               |
        | modify it under the terms of the GNU General Public License                 |
        | as published by the Free Software Foundation; either version 2              |
        | of the License, or (at your option) any later version.                      |
        |                                                                             |
        | This program is distributed in the hope that it will be useful,             |
        | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
        | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
        | GNU General Public License for more details.                                |
        |                                                                             |
        | You should have received a copy of the GNU General Public License           |
        | along with this program; if not, write to the Free Software                 |
        | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
        +-----------------------------------------------------------------------------+
*/

include_once './Services/Search/classes/class.ilSearchSettings.php';
include_once './Services/Search/classes/class.ilSearchBaseGUI.php';
include_once './Services/Search/classes/Lucene/class.ilLuceneAdvancedSearchFields.php';
include_once './Services/PersonalDesktop/interfaces/interface.ilDesktopItemHandling.php';
include_once './Services/Administration/interfaces/interface.ilAdministrationCommandHandling.php';

class ilLuceneSearchGUI extends ilSearchBaseGUI
{
        protected $ilTabs;
        
        public function __construct()
        {
                global $ilTabs;
                
                $this->tabs_gui = $ilTabs;
                parent::__construct();
                $this->fields = ilLuceneAdvancedSearchFields::getInstance(); 
                $this->initUserSearchCache();
                
        }
        
        public function executeCommand()
        {
                global $ilBench, $ilCtrl;
                
                $ilBench->start('Lucene','0900_executeCommand');
                $next_class = $this->ctrl->getNextClass($this);
                $cmd = $this->ctrl->getCmd();

                $this->prepareOutput();
                switch($next_class)
                {
                        case "ilpropertyformgui":
                                /*$this->initStandardSearchForm(ilSearchBaseGUI::SEARCH_FORM_LUCENE);
                                $ilCtrl->setReturn($this, 'storeRoot');
                                $ilCtrl->forwardCommand($this->form);*/
                                $form = $this->getSearchAreaForm();
                                $ilCtrl->setReturn($this, 'storeRoot');
                                $ilCtrl->forwardCommand($form);
                                break;
                        
                        case 'ilobjectcopygui':
                                include_once './Services/Object/classes/class.ilObjectCopyGUI.php';
                                $cp = new ilObjectCopyGUI($this);
                                $this->ctrl->forwardCommand($cp);
                                break;
                        
                        default:
                                $this->initStandardSearchForm(ilSearchBaseGUI::SEARCH_FORM_LUCENE);
                                if(!$cmd)
                                {
                                        $cmd = "showSavedResults";
                                }
                                $this->handleCommand($cmd);
                                break;
                }
                $ilBench->stop('Lucene','0900_executeCommand');
                return true;
        }
        
        public function prepareOutput()
        {
                parent::prepareOutput();
                $this->getTabs();
                return true;
        }
        
        protected function getType()
        {
                if(count($this->search_cache))
                {
                        return ilSearchBaseGUI::SEARCH_DETAILS;
                }
                return ilSearchBaseGUI::SEARCH_FAST;
        }
        
        protected function getDetails()
        {
                return (array) $this->search_cache->getItemFilter();
        }
        
        protected function getMimeDetails()
        {
                return (array) $this->search_cache->getMimeFilter();
        }
        
        protected function remoteSearch()
        {
                $_POST['query'] = $_POST['queryString'];
                $this->search_cache->setRoot((int) $_POST['root_id']);
                $this->search_cache->setQuery(ilUtil::stripSlashes($_POST['queryString']));
                $this->search_cache->save();
                
                $this->search();
        }
        
        protected function showSavedResults()
        {
                global $ilUser,$ilBench;
                
                if(!strlen($this->search_cache->getQuery()))
                {
                        $this->showSearchForm();
                        return false;
                }

                include_once './Services/Search/classes/Lucene/class.ilLuceneSearcher.php';
                include_once './Services/Search/classes/Lucene/class.ilLuceneQueryParser.php';
                $qp = new ilLuceneQueryParser($this->search_cache->getQuery());
                $qp->parse();
                $searcher = ilLuceneSearcher::getInstance($qp);
                $searcher->search();

                // Load saved results
                include_once './Services/Search/classes/Lucene/class.ilLuceneSearchResultFilter.php';
                $filter = ilLuceneSearchResultFilter::getInstance($ilUser->getId());
                $filter->loadFromDb();

                // Highlight
                $searcher->highlight($filter->getResultObjIds());
                
                include_once './Services/Search/classes/class.ilSearchResultPresentation.php';
                $presentation = new ilSearchResultPresentation($this);
                $presentation->setResults($filter->getResultIds());
                
                $presentation->setSearcher($searcher);

                // TODO: other handling required
                $this->addPager($filter,'max_page');

                $presentation->setPreviousNext($this->prev_link, $this->next_link);
                        
                $this->showSearchForm();        

                if($presentation->render())
                {
                        $this->tpl->setVariable('SEARCH_RESULTS',$presentation->getHTML(true));
                }
                elseif(strlen($this->search_cache->getQuery()))
                {
                        ilUtil::sendInfo(sprintf($this->lng->txt('search_no_match_hint'),$qp->getQuery()));
                }
        }
        
        protected function search()
        {
                if(!$this->form->checkInput())
                {
                        $this->search_cache->deleteCachedEntries();
                        // Reset details
                        include_once './Services/Object/classes/class.ilSubItemListGUI.php';
                        ilSubItemListGUI::resetDetails();
                        $this->showSearchForm();
                        return false;
                }
                
                unset($_SESSION['max_page']);
                $this->search_cache->deleteCachedEntries();
                
                // Reset details
                include_once './Services/Object/classes/class.ilSubItemListGUI.php';
                ilSubItemListGUI::resetDetails();
                
                $this->performSearch();
        }
        
        protected function performSearch()
        {
                global $ilUser,$ilBench;
                
                unset($_SESSION['vis_references']);

                $filter_query = '';
                if($this->search_cache->getItemFilter() and ilSearchSettings::getInstance()->isLuceneItemFilterEnabled())
                {
                        $filter_settings = ilSearchSettings::getInstance()->getEnabledLuceneItemFilterDefinitions();
                        foreach((array) $this->search_cache->getItemFilter() as $obj => $value)
                        {
                                if(!$filter_query)
                                {
                                        $filter_query .= '+( ';
                                }
                                else
                                {
                                        $filter_query .= 'OR';
                                }
                                $filter_query .= (' '. (string) $filter_settings[$obj]['filter'].' ');
                        }
                        $filter_query .= ') ';
                }
                // begin-patch mime_filter
                $mime_query = '';
                if($this->search_cache->getMimeFilter() and ilSearchSettings::getInstance()->isLuceneMimeFilterEnabled())
                {
                        $filter_settings = ilSearchSettings::getInstance()->getEnabledLuceneMimeFilterDefinitions();
                        foreach($this->search_cache->getMimeFilter() as $mime => $value)
                        {
                                if(!$mime_query)
                                {
                                        $mime_query .= '+( ';
                                }
                                else
                                {
                                        $mime_query .= 'OR';
                                }
                                $mime_query .= (' '. (string) $filter_settings[$mime]['filter'].' ');
                        }
                        $mime_query .= ') ';
                }
                $filter_query = $filter_query . ' '. $mime_query;
                
                include_once './Services/Search/classes/Lucene/class.ilLuceneSearcher.php';
                include_once './Services/Search/classes/Lucene/class.ilLuceneQueryParser.php';
                $qp = new ilLuceneQueryParser($filter_query.' +('.$this->search_cache->getQuery().')');
                $qp->parse();
                $searcher = ilLuceneSearcher::getInstance($qp);
                $searcher->search();
                
                // Filter results
                include_once './Services/Search/classes/Lucene/class.ilLuceneSearchResultFilter.php';
                include_once './Services/Search/classes/Lucene/class.ilLucenePathFilter.php';
                $filter = ilLuceneSearchResultFilter::getInstance($ilUser->getId());
                $filter->addFilter(new ilLucenePathFilter($this->search_cache->getRoot()));
                $filter->setCandidates($searcher->getResult());
                $filter->filter();
                                
                if($filter->getResultObjIds()) {
                        $searcher->highlight($filter->getResultObjIds());
                }

                // Show results
                $this->showSearchForm();

                include_once './Services/Search/classes/class.ilSearchResultPresentation.php';
                $presentation = new ilSearchResultPresentation($this);
                $presentation->setResults($filter->getResultIds());
                $presentation->setSearcher($searcher);

                // TODO: other handling required
                $ilBench->start('Lucene','1500_fo');
                $this->addPager($filter,'max_page');
                $ilBench->stop('Lucene','1500_fo');

                $presentation->setPreviousNext($this->prev_link, $this->next_link);

                if($presentation->render())
                {
                        $this->tpl->setVariable('SEARCH_RESULTS',$presentation->getHTML(true));
                }
                else
                {
                        ilUtil::sendInfo(sprintf($this->lng->txt('search_no_match_hint'),$this->search_cache->getQuery()));
                }
        }
        
        protected function storeRoot()
        {
                $form = $this->getSearchAreaForm();

                $this->root_node = $form->getItemByPostVar('area')->getValue();
                $this->search_cache->setRoot($this->root_node);
                $this->search_cache->save();
                $this->search_cache->deleteCachedEntries();

                include_once './Services/Object/classes/class.ilSubItemListGUI.php';
                ilSubItemListGUI::resetDetails();

                $this->performSearch();
        }
        
        protected function getTabs()
        {
                if(ilSearchSettings::getInstance()->getHideAdvancedSearch())
                {
                        return false;
                }

                $this->tabs_gui->addTarget('search',$this->ctrl->getLinkTarget($this));
                
                if(ilSearchSettings::getInstance()->isLuceneUserSearchEnabled())
                {
                        $this->tabs_gui->addTarget('search_user',$this->ctrl->getLinkTargetByClass('illuceneusersearchgui'));
                }
                
                if($this->fields->getActiveFields())
                {
                        $this->tabs_gui->addTarget('search_advanced',$this->ctrl->getLinkTargetByClass('illuceneAdvancedSearchgui'));
                }
                
                $this->tabs_gui->setTabActive('search');
                
        }
        
        protected function initUserSearchCache()
        {
                global $ilUser;
                
                include_once('Services/Search/classes/class.ilUserSearchCache.php');
                $this->search_cache = ilUserSearchCache::_getInstance($ilUser->getId());
                $this->search_cache->switchSearchType(ilUserSearchCache::LUCENE_DEFAULT);
                if((int) $_GET['page_number'])
                {
                        $this->search_cache->setResultPageNumber((int) $_GET['page_number']);
                }
                if(isset($_POST['term']))
                {
                        $this->search_cache->setQuery(ilUtil::stripSlashes($_POST['term']));
                        if($_POST['item_filter_enabled'])
                        {
                                $filtered = array();
                                foreach(ilSearchSettings::getInstance()->getEnabledLuceneItemFilterDefinitions() as $type => $data)
                                {
                                        if($_POST['filter_type'][$type])
                                        {
                                                $filtered[$type] = 1;
                                        }
                                }
                                $this->search_cache->setItemFilter($filtered);

                                // Mime filter
                                $mime = array();
                                foreach(ilSearchSettings::getInstance()->getEnabledLuceneMimeFilterDefinitions() as $type => $data)
                                {
                                        if($_POST['filter_type'][$type])
                                        {
                                                $mime[$type] = 1;
                                        }
                                }
                                $this->search_cache->setMimeFilter($mime);
                        }
                        else
                        {
                                // @todo: keep item filter settings
                                $this->search_cache->setItemFilter(array());
                                $this->search_cache->setMimeFilter(array());
                        }
                }
        }
        
        protected function fillAdminPanel()
        {
                global $lng;
                
                $adm_view_cmp = $adm_cmds = $creation_selector = $adm_view = false;

                // admin panel commands
                if ((count($this->admin_panel_commands) > 0))
                {
                        foreach($this->admin_panel_commands as $cmd)
                        {
                                $this->tpl->setCurrentBlock("lucene_admin_panel_cmd");
                                $this->tpl->setVariable("LUCENE_PANEL_CMD", $cmd["cmd"]);
                                $this->tpl->setVariable("LUCENE_TXT_PANEL_CMD", $cmd["txt"]);
                                $this->tpl->parseCurrentBlock();
                        }

                        $adm_cmds = true;
                }
                if ($adm_cmds)
                {
                        $this->tpl->setCurrentBlock("lucene_adm_view_components");
                        $this->tpl->setVariable("LUCENE_ADM_IMG_ARROW", ilUtil::getImagePath("arrow_upright.png"));
                        $this->tpl->setVariable("LUCENE_ADM_ALT_ARROW", $lng->txt("actions"));
                        $this->tpl->parseCurrentBlock();
                        $adm_view_cmp = true;
                }
                
                // admin view button
                if (is_array($this->admin_view_button))
                {
                        if (is_array($this->admin_view_button))
                        {
                                $this->tpl->setCurrentBlock("lucene_admin_button");
                                $this->tpl->setVariable("LUCENE_ADMIN_MODE_LINK",
                                        $this->admin_view_button["link"]);
                                $this->tpl->setVariable("LUCENE_TXT_ADMIN_MODE",
                                        $this->admin_view_button["txt"]);
                                $this->tpl->parseCurrentBlock();
                        }
                        $this->tpl->setCurrentBlock("lucene_admin_view");
                        $this->tpl->parseCurrentBlock();
                        $adm_view = true;
                }
                
                // creation selector
                if (is_array($this->creation_selector))
                {
                        $this->tpl->setCurrentBlock("lucene_add_commands");
                        if ($adm_cmds)
                        {
                                $this->tpl->setVariable("LUCENE_ADD_COM_WIDTH", 'width="1"');
                        }
                        $this->tpl->setVariable("LUCENE_SELECT_OBJTYPE_REPOS",
                                $this->creation_selector["options"]);
                        $this->tpl->setVariable("LUCENE_BTN_NAME_REPOS",
                                $this->creation_selector["command"]);
                        $this->tpl->setVariable("LUCENE_TXT_ADD_REPOS",
                                $this->creation_selector["txt"]);
                        $this->tpl->parseCurrentBlock();
                        $creation_selector = true;
                }
                if ($adm_view || $creation_selector)
                {
                        $this->tpl->setCurrentBlock("lucene_adm_panel");
                        if ($adm_view_cmp)
                        {
                                $this->tpl->setVariable("LUCENE_ADM_TBL_WIDTH", 'width:"100%";');
                        }
                        $this->tpl->parseCurrentBlock();
                }
        }
        
        protected function addAdminPanelCommand($a_cmd, $a_txt)
        {
                $this->admin_panel_commands[] =
                        array("cmd" => $a_cmd, "txt" => $a_txt);
        }
        
        protected function setAdminViewButton($a_link, $a_txt)
        {
                $this->admin_view_button =
                        array("link" => $a_link, "txt" => $a_txt);
        }
        
        protected function setPageFormAction($a_action)
        {
                $this->page_form_action = $a_action;
        }
        
        protected function showSearchForm()
        {
                global $ilCtrl, $lng;
                
                $this->tpl->addBlockFile('ADM_CONTENT','adm_content','tpl.lucene_search.html','Services/Search');

                // include js needed
                include_once("./Services/UIComponent/Overlay/classes/class.ilOverlayGUI.php");
                ilOverlayGUI::initJavascript();
                $this->tpl->addJavascript("./Services/Search/js/Search.js");

                $this->tpl->setVariable("FORM_ACTION", $ilCtrl->getFormAction($this,'performSearch'));
                $this->tpl->setVariable("TERM", ilUtil::prepareFormOutput($this->search_cache->getQuery()));
                $this->tpl->setVariable("TXT_SEARCH", $lng->txt("search"));
                $this->tpl->setVariable("TXT_OPTIONS", $lng->txt("options"));
                $this->tpl->setVariable("ARR_IMG", ilUtil::img(ilUtil::getImagePath("mm_down_arrow_dark.png")));
                $this->tpl->setVariable("TXT_COMBINATION", $lng->txt("search_term_combination"));
                $this->tpl->setVariable('TXT_COMBINATION_DEFAULT', ilSearchSettings::getInstance()->getDefaultOperator() == ilSearchSettings::OPERATOR_AND ? $lng->txt('search_all_words') : $lng->txt('search_any_word'));
                $this->tpl->setVariable("TXT_AREA", $lng->txt("search_area"));

                if (ilSearchSettings::getInstance()->isLuceneItemFilterEnabled())
                {
                        $this->tpl->setCurrentBlock("type_sel");
                        $this->tpl->setVariable('TXT_TYPE_DEFAULT',$lng->txt("search_off"));
                        $this->tpl->setVariable("ARR_IMGT", ilUtil::img(ilUtil::getImagePath("mm_down_arrow_dark.png")));
                        $this->tpl->setVariable("TXT_FILTER_BY_TYPE", $lng->txt("search_filter_by_type"));
                        $this->tpl->setVariable('FORM',$this->form->getHTML());
                        $this->tpl->parseCurrentBlock();
                }

                // search area form
                $this->tpl->setVariable('SEARCH_AREA_FORM', $this->getSearchAreaForm()->getHTML());
                $this->tpl->setVariable("TXT_CHANGE", $lng->txt("change"));
                
                return true;
        }
}
?>