class.ilRepositorySearchGUI.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2001 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.ilSearchResult.php';
include_once 'Services/Search/classes/class.ilSearchSettings.php';
include_once './Services/User/classes/class.ilUserAccountSettings.php';
include_once 'Services/Search/classes/class.ilQueryParser.php';
include_once("./Services/User/classes/class.ilUserAutoComplete.php");


class ilRepositorySearchGUI
{
        private $search_results = array();
        
        protected $add_options = array();
        protected $object_selection = false;

        protected $searchable_check = true;
        protected $search_title = '';
        
        var $search_type = 'usr';
        protected $user_limitations = true;

        private $privacy_mode = ilUserAutoComplete::PRIVACY_MODE_IGNORE_USER_SETTING;


        function __construct()
        {
                global $ilCtrl,$tpl,$lng;

                $this->ctrl = $ilCtrl;
                $this->tpl = $tpl;
                $this->lng = $lng;
                $this->lng->loadLanguageModule('search');
                $this->lng->loadLanguageModule('crs');

                $this->setTitle($this->lng->txt('add_members_header'));

                $this->__setSearchType();
                $this->__loadQueries();

                $this->result_obj = new ilSearchResult();
                $this->result_obj->setMaxHits(1000000);
                $this->settings = new ilSearchSettings();

        }

        public function setTitle($a_title)
        {
                $this->search_title = $a_title;
        }

        public function getTitle()
        {
                return $this->search_title;
        }

        public function enableSearchableCheck($a_status)
        {
                $this->searchable_check = $a_status;
        }

        public function isSearchableCheckEnabled()
        {
                return $this->searchable_check;
        }

        public function setPrivacyMode($privacy_mode)
        {
                $this->privacy_mode = $privacy_mode;
        }

        public function getPrivacyMode()
        {
                return $this->privacy_mode;
        }


        public static function fillAutoCompleteToolbar($parent_object, ilToolbarGUI $toolbar = null, $a_options = array(), $a_sticky = false)
        {
                global $ilToolbar, $lng, $ilCtrl, $tree;

                if(!$toolbar instanceof ilToolbarGUI)
                {
                        $toolbar = $ilToolbar;
                }
                
                // Fill default options
                if(!isset($a_options['auto_complete_name']))
                {
                        $a_options['auto_complete_name'] = $lng->txt('obj_user');
                }
                if(!isset($a_options['auto_complete_size']))
                {
                        $a_options['auto_complete_size'] = 15;
                }
                if(!isset($a_options['submit_name']))
                {
                        $a_options['submit_name'] = $lng->txt('btn_add');
                }
                if(!isset($a_options['user_type_default']))
                {
                        $a_options['user_type_default'] = null;
                }
                
                $ajax_url = $ilCtrl->getLinkTargetByClass(array(get_class($parent_object),'ilRepositorySearchGUI'), 
                        'doUserAutoComplete', '', true,false);

                include_once("./Services/Form/classes/class.ilTextInputGUI.php");
                $ul = new ilTextInputGUI($a_options['auto_complete_name'], 'user_login');
                $ul->setDataSource($ajax_url);          
                $ul->setSize($a_options['auto_complete_size']);
                if(!$a_sticky)
                {
                        $toolbar->addInputItem($ul, true);
                }
                else
                {
                        $toolbar->addStickyItem($ul, true);
                }

                if(count((array) $a_options['user_type']))
                {
                        include_once './Services/Form/classes/class.ilSelectInputGUI.php';
                        $si = new ilSelectInputGUI("", "user_type");
                        $si->setOptions($a_options['user_type']);
                        $si->setValue($a_options['user_type_default']);
                        if(!$a_sticky)
                        {
                                $toolbar->addInputItem($si);
                        }
                        else
                        {
                                $toolbar->addStickyItem($si);
                        }
                }
                
                include_once './Services/User/classes/class.ilUserClipboard.php';
                $clip = ilUserClipboard::getInstance($GLOBALS['ilUser']->getId());
                if($clip->hasContent())
                {
                        include_once './Services/UIComponent/SplitButton/classes/class.ilSplitButtonGUI.php';
                        $action_button = ilSplitButtonGUI::getInstance();

                        include_once './Services/UIComponent/Button/classes/class.ilLinkButton.php';
                        $add_button = ilSubmitButton::getInstance();
                        $add_button->setCaption($a_options['submit_name'], false);
                        $add_button->setCommand('addUserFromAutoComplete');

                        $action_button->setDefaultButton($add_button);

                        include_once './Services/UIComponent/Button/classes/class.ilLinkButton.php';
                        $clip_button = ilSubmitButton::getInstance();
                        $clip_button->addCSSClass('btn btndefault');
                        $GLOBALS['DIC']->language()->loadLanguageModule('user');
                        $clip_button->setCaption($GLOBALS['DIC']->language()->txt('clipboard_add_from_btn'), false);
                        $clip_button->setCommand('showClipboard');

                        $action_button->addMenuItem(new ilButtonToSplitButtonMenuItemAdapter($clip_button));

                        $toolbar->addButtonInstance($action_button);
                }
                else
                {
                        include_once "Services/UIComponent/Button/classes/class.ilSubmitButton.php";
                        $button = ilSubmitButton::getInstance();
                        $button->setCaption($a_options['submit_name'], false);
                        $button->setCommand('addUserFromAutoComplete');
                        if(!$a_sticky)
                        {
                                $toolbar->addButtonInstance($button);
                        }
                        else
                        {
                                $toolbar->addStickyItem($button);
                        }
                }
                
                if((bool)$a_options['add_search'] || 
                        is_numeric($a_options['add_from_container']))
                {               
                        $lng->loadLanguageModule("search");
                        
                        $toolbar->addSeparator();
                                        
                        if((bool)$a_options['add_search'])
                        {                                                                                       
                                include_once "Services/UIComponent/Button/classes/class.ilLinkButton.php";
                                $button = ilLinkButton::getInstance();
                                $button->setCaption("search_users");
                                $button->setUrl($ilCtrl->getLinkTargetByClass('ilRepositorySearchGUI',''));
                                $toolbar->addButtonInstance($button);                           
                        }

                        if(is_numeric($a_options['add_from_container']))
                        {                               
                                $parent_ref_id = (int)$a_options['add_from_container'];
                                $parent_container_ref_id = $tree->checkForParentType($parent_ref_id, "grp");
                                $parent_container_type = "grp";
                                if(!$parent_container_ref_id)
                                {                       
                                        $parent_container_ref_id = $tree->checkForParentType($parent_ref_id, "crs");    
                                        $parent_container_type = "crs";
                                }
                                if($parent_container_ref_id)
                                {
                                        if((bool)$a_options['add_search'])
                                        {       
                                                $toolbar->addSpacer();
                                        }
                                        
                                        $ilCtrl->setParameterByClass('ilRepositorySearchGUI', "list_obj", ilObject::_lookupObjId($parent_container_ref_id));
                                        
                                        include_once "Services/UIComponent/Button/classes/class.ilLinkButton.php";
                                        $button = ilLinkButton::getInstance();
                                        $button->setCaption("search_add_members_from_container_".$parent_container_type);
                                        $button->setUrl($ilCtrl->getLinkTargetByClass(array(get_class($parent_object),'ilRepositorySearchGUI'), 'listUsers'));
                                        $toolbar->addButtonInstance($button);           
                                }
                        }
                }
                
                $toolbar->setFormAction(
                        $ilCtrl->getFormActionByClass(
                                array(
                                        get_class($parent_object),
                                        'ilRepositorySearchGUI')
                        )
                );
                return $toolbar;
        }

        protected function doUserAutoComplete()
        {
                // hide anonymout request
                if($GLOBALS['ilUser']->getId() == ANONYMOUS_USER_ID)
                {
                        include_once './Services/JSON/classes/class.ilJsonUtil.php';
                        return ilJsonUtil::encode(new stdClass());
                        exit;
                }
                
                
                if(!isset($_GET['autoCompleteField']))
                {
                        $a_fields = array('login','firstname','lastname','email');
                        $result_field = 'login';
                }
                else
                {
                        $a_fields = array((string) $_GET['autoCompleteField']);
                        $result_field = (string) $_GET['autoCompleteField'];
                }

                include_once './Services/User/classes/class.ilUserAutoComplete.php';
                $auto = new ilUserAutoComplete();
                $auto->setPrivacyMode($this->getPrivacyMode());

                if(($_REQUEST['fetchall']))
                {
                        $auto->setLimit(ilUserAutoComplete::MAX_ENTRIES);
                }

                $auto->setMoreLinkAvailable(true);
                $auto->setSearchFields($a_fields);
                $auto->setResultField($result_field);
                $auto->enableFieldSearchableCheck(true);
                $auto->setUserLimitations($this->getUserLimitations());

                echo $auto->getList($_REQUEST['term']);
                exit();
        }


        function setString($a_str)
        {
                $_SESSION['search']['string'] = $this->string = $a_str;
        }
        function getString()
        {
                return $this->string;
        }
                
        function executeCommand()
        {
                global $rbacsystem;

                $next_class = $this->ctrl->getNextClass($this);
                $cmd = $this->ctrl->getCmd();

                $this->ctrl->setReturn($this,'');

                switch($next_class)
                {
                        default:
                                if(!$cmd)
                                {
                                        $cmd = "showSearch";
                                }
                                $this->$cmd();
                                break;
                }
                return true;
        }

        function __clearSession()
        {
                
                unset($_SESSION['rep_search']);
                unset($_SESSION['append_results']);
                unset($_SESSION['rep_query']);
                unset($_SESSION['rep_search_type']);
        }

        function cancel()
        {
                $this->ctrl->returnToParent($this);
        }

        function start()
        {
                // delete all session info
                $this->__clearSession();
                $this->showSearch();

                return true;
        }


        public function addUser()
        {
                $class = $this->callback['class'];
                $method = $this->callback['method'];
                
                // call callback if that function does give a return value => show error message
                // listener redirects if everything is ok.
                $class->$method($_POST['user']);

                $this->showSearchResults();
        }

        protected function addUserFromAutoComplete()
        {
                $class = $this->callback['class'];
                $method = $this->callback['method'];

                $users = explode(',', $_POST['user_login']);
                $user_ids = array();
                foreach($users as $user)
                {
                        $user_id = ilObjUser::_lookupId($user);
                        if($user_id)
                        {
                                $user_ids[] = $user_id;
                        }
                }

                $user_type = isset($_REQUEST['user_type']) ? $_REQUEST['user_type'] : 0;

                if(!$class->$method($user_ids,$user_type))
                {
                        $GLOBALS['ilCtrl']->returnToParent($this);
                }
        }
        
        protected function showClipboard()
        {
                $GLOBALS['ilCtrl']->setParameter($this, 'user_type', (int) $_REQUEST['user_type']);
                
                ilLoggerFactory::getLogger('crs')->dump($_REQUEST);
                
                $GLOBALS['ilTabs']->clearTargets();
                $GLOBALS['ilTabs']->setBackTarget(
                        $GLOBALS['lng']->txt('back'),
                        $GLOBALS['ilCtrl']->getParentReturn($this)
                );
                
                include_once './Services/User/classes/class.ilUserClipboardTableGUI.php';
                $clip = new ilUserClipboardTableGUI($this, 'showClipboard', $GLOBALS['ilUser']->getId());
                $clip->setFormAction($GLOBALS['ilCtrl']->getFormAction($this));
                $clip->init();
                $clip->parse();
                
                $GLOBALS['tpl']->setContent($clip->getHTML());
        }
        
        protected function addFromClipboard()
        {
                $GLOBALS['ilCtrl']->setParameter($this, 'user_type', (int) $_REQUEST['user_type']);
                $users = (array) $_POST['uids'];
                if(!count($users))
                {
                        ilUtil::sendFailure($this->lng->txt('select_one'), true);
                        $GLOBALS['ilCtrl']->redirect($this, 'showClipboard');
                }
                $class = $this->callback['class'];
                $method = $this->callback['method'];
                $user_type = isset($_REQUEST['user_type']) ? $_REQUEST['user_type'] : 0;

                if(!$class->$method($users,$user_type))
                {
                        $GLOBALS['ilCtrl']->returnToParent($this);
                }
        }

        protected function removeFromClipboard()
        {
                $GLOBALS['ilCtrl']->setParameter($this, 'user_type', (int) $_REQUEST['user_type']);
                $users = (array) $_POST['uids'];
                if(!count($users))
                {
                        ilUtil::sendFailure($this->lng->txt('select_one'), true);
                        $GLOBALS['ilCtrl']->redirect($this, 'showClipboard');
                }

                include_once './Services/User/classes/class.ilUserClipboard.php';
                $clip = ilUserClipboard::getInstance($GLOBALS['ilUser']->getId());
                $clip->delete($users);
                $clip->save();
                
                ilUtil::sendSuccess($this->lng->txt('settings_saved'),true);
                $this->ctrl->redirect($this, 'showClipboard');
        }

        protected function emptyClipboard()
        {
                include_once './Services/User/classes/class.ilUserClipboard.php';
                $clip = ilUserClipboard::getInstance($GLOBALS['ilUser']->getId());
                $clip->clear();
                $clip->save();
                
                ilUtil::sendSuccess($this->lng->txt('settings_saved'),true);
                $this->ctrl->returnToParent($this);
        }

        protected function handleMultiCommand()
        {
                $class = $this->callback['class'];
                $method = $this->callback['method'];

                // Redirects if everything is ok
                if(!$class->$method((array) $_POST['user'],$_POST['selectedCommand']))
                {
                        $this->showSearchResults();
                }
        }

        public function setCallback(&$class,$method,$a_add_options = array())
        {
                $this->callback = array('class' => $class,'method' => $method);
                $this->add_options = $a_add_options ? $a_add_options : array();
        }
        
        public function showSearch()
        {
                $this->initFormSearch();
                $this->tpl->setContent($this->form->getHTML());
        }
        
        public function showSearchSelected()
        {
                $selected = (int) $_REQUEST['selected_id'];
                
                #include_once './Services/Object/classes/class.ilObjectFactory.php';
                #$factory = new ilObjectFactory();
                #$user = $factory->getInstanceByObjId($selected);
                
                #$this->initFormSearch($user);
                #$this->tpl->setContent($this->form->getHTML());
                
                $this->tpl->addBlockFile('ADM_CONTENT','adm_content','tpl.rep_search_result.html','Services/Search');
                $this->addNewSearchButton();
                $this->showSearchUserTable(array($selected),'showSearchResults');
        }
        
        public function initFormSearch(ilObjUser $user = NULL)
        {
                global $ilCtrl;

                include_once './Services/Form/classes/class.ilPropertyFormGUI.php';
                
                $this->form =  new ilPropertyFormGUI();
                $this->form->setFormAction($this->ctrl->getFormAction($this,'search'));
                $this->form->setTitle($this->getTitle());
                $this->form->addCommandButton('performSearch', $this->lng->txt('search'));
                $this->form->addCommandButton('cancel', $this->lng->txt('cancel'));
                
                
                $kind = new ilRadioGroupInputGUI($this->lng->txt('search_type'),'search_for');
                $kind->setValue($this->search_type);
                $this->form->addItem($kind);
                
                // Users
                $users = new ilRadioOption($this->lng->txt('search_for_users'),'usr');
                        
                // UDF
                include_once 'Services/Search/classes/class.ilUserSearchOptions.php';
                foreach(ilUserSearchOptions::_getSearchableFieldsInfo(!$this->isSearchableCheckEnabled()) as $info)
                {
                        switch($info['type'])
                        {
                                case FIELD_TYPE_UDF_SELECT:
                                case FIELD_TYPE_SELECT:
                                                
                                        $sel = new ilSelectInputGUI($info['lang'],"rep_query[usr][".$info['db']."]");
                                        $sel->setOptions($info['values']);
                                        $users->addSubItem($sel);
                                        break;
        
                                case FIELD_TYPE_MULTI:
                                case FIELD_TYPE_UDF_TEXT:
                                case FIELD_TYPE_TEXT:

                                        if(isset($info['autoComplete']) and $info['autoComplete'])
                                        {
                                                $ilCtrl->setParameterByClass(get_class($this),'autoCompleteField',$info['db']);
                                                $ul = new ilTextInputGUI($info['lang'], "rep_query[usr][".$info['db']."]");
                                                $ul->setDataSourceSubmitOnSelection(TRUE);
                                                $ul->setDataSourceSubmitUrl(
                                                                $this->ctrl->getLinkTarget(
                                                                                $this,
                                                                                'showSearchSelected',
                                                                                '',
                                                                                FALSE,
                                                                                FALSE
                                                                )
                                                );
                                                $ul->setDataSource($ilCtrl->getLinkTarget($this,
                                                        "doUserAutoComplete", "", true));                                       
                                                $ul->setSize(30);
                                                $ul->setMaxLength(120);
                                                
                                                if($user instanceof ilObjUser)
                                                {
                                                        switch($info['db'])
                                                        {
                                                                case 'firstname':
                                                                        $ul->setValue($user->getFirstname());
                                                                        break;
                                                                case 'lastname':
                                                                        $ul->setValue($user->getLastname());
                                                                        break;
                                                                case 'login':
                                                                        $ul->setValue($user->getLogin());
                                                                        break;
                                                        }
                                                }
                                                
                                                
                                                
                                                $users->addSubItem($ul);
                                        }
                                        else
                                        {
                                                $txt = new ilTextInputGUI($info['lang'],"rep_query[usr][".$info['db']."]");
                                                $txt->setSize(30);
                                                $txt->setMaxLength(120);
                                                $users->addSubItem($txt);
                                        }
                                        break;
                        }
                }
                $kind->addOption($users);



                // Role
                $roles = new ilRadioOption($this->lng->txt('search_for_role_members'),'role');
                $role = new ilTextInputGUI($this->lng->txt('search_role_title'),'rep_query[role][title]');
                $role->setSize(30);
                $role->setMaxLength(120);
                $roles->addSubItem($role);
                $kind->addOption($roles);
                        
                // Course
                $groups = new ilRadioOption($this->lng->txt('search_for_crs_members'),'crs');
                $group = new ilTextInputGUI($this->lng->txt('search_crs_title'),'rep_query[crs][title]');
                $group->setSize(30);
                $group->setMaxLength(120);
                $groups->addSubItem($group);
                $kind->addOption($groups);

                // Group
                $groups = new ilRadioOption($this->lng->txt('search_for_grp_members'),'grp');
                $group = new ilTextInputGUI($this->lng->txt('search_grp_title'),'rep_query[grp][title]');
                $group->setSize(30);
                $group->setMaxLength(120);
                $groups->addSubItem($group);
                $kind->addOption($groups);
        }
        

        function show()
        {
                $this->showSearchResults();
        }

        function appendSearch()
        {
                $_SESSION['search_append'] = true;
                $this->performSearch();
        }

        function performSearch()
        {
                $found_query = false;
                foreach((array) $_POST['rep_query'][$_POST['search_for']] as $field => $value)
                {
                        if(trim(ilUtil::stripSlashes($value)))
                        {
                                $found_query = true;
                                break;
                        }
                }
                if(!$found_query)
                {
                        ilUtil::sendFailure($this->lng->txt('msg_no_search_string'));
                        $this->start();
                        return false;
                }
        
                // unset search_append if called directly
                if($_POST['cmd']['performSearch'])
                {
                        unset($_SESSION['search_append']);
                }

                switch($this->search_type)
                {
                        case 'usr':
                                $this->__performUserSearch();
                                break;

                        case 'grp':
                                $this->__performGroupSearch();
                                break;

                        case 'crs':
                                $this->__performCourseSearch();
                                break;

                        case 'role':
                                $this->__performRoleSearch();
                                break;

                        default:
                                echo 'not defined';
                }
                
                $GLOBALS['DIC']->logger()->src()->dump($this->result_obj->getEntries());
                
                $this->result_obj->setRequiredPermission('read');
                $this->result_obj->addObserver($this, 'searchResultFilterListener');
                $this->result_obj->filter(ROOT_FOLDER_ID,QP_COMBINATION_OR);
                
                // User access filter
                if($this->search_type == 'usr')
                {
                        include_once './Services/User/classes/class.ilUserFilter.php';
                        $this->search_results = array_intersect(
                                $this->result_obj->getResultIds(),
                                ilUserFilter::getInstance()->filter($this->result_obj->getResultIds())
                        );
                }
                else
                {
                        $this->search_results = array();
                        foreach((array) $this->result_obj->getResults() as $res)
                        {
                                $this->search_results[] = $res['obj_id'];
                        }
                }

                if(!count($this->search_results))
                {
                        ilUtil::sendFailure($this->lng->txt('search_no_match'));
                        $this->showSearch();
                        return true;
                }
                $this->__updateResults();
                if($this->result_obj->isLimitReached())
                {
                        $message = sprintf($this->lng->txt('search_limit_reached'),$this->settings->getMaxHits());
                        ilUtil::sendInfo($message);
                        return true;
                }
                // show results
                $this->show();
                return true;
        }

        function __performUserSearch()
        {
                include_once 'Services/Search/classes/class.ilUserSearchOptions.php';
                include_once 'Services/Search/classes/class.ilObjectSearchFactory.php';

                foreach(ilUserSearchOptions::_getSearchableFieldsInfo(!$this->isSearchableCheckEnabled()) as $info)
                {
                        $name = $info['db'];
                        $query_string = $_SESSION['rep_query']['usr'][$name];

                        // continue if no query string is given
                        if(!$query_string)
                        {
                                continue;
                        }
                
                        if(!is_object($query_parser = $this->__parseQueryString($query_string, true, ($info['type'] == FIELD_TYPE_SELECT))))
                        {
                                ilUtil::sendInfo($query_parser);
                                return false;
                        }
                        switch($info['type'])
                        {
                                case FIELD_TYPE_UDF_SELECT:
                                        // Do a phrase query for select fields
                                        $query_parser = $this->__parseQueryString('"'.$query_string.'"');
                                                        
                                case FIELD_TYPE_UDF_TEXT:
                                        $udf_search = ilObjectSearchFactory::_getUserDefinedFieldSearchInstance($query_parser);
                                        $udf_search->setFields(array($name));
                                        $result_obj = $udf_search->performSearch();

                                        // Store entries
                                        $this->__storeEntries($result_obj);
                                        break;

                                case FIELD_TYPE_SELECT:
                                        
                                        if($info['db'] == 'org_units')
                                        {
                                                $user_search = ilObjectSearchFactory::getUserOrgUnitAssignmentInstance($query_parser);
                                                $result_obj = $user_search->performSearch();
                                                $this->__storeEntries($result_obj);
                                                break;
                                        }
                                        
                                        // Do a phrase query for select fields
                                        $query_parser = $this->__parseQueryString('"'.$query_string.'"', true, true);

                                case FIELD_TYPE_TEXT:
                                        $user_search =& ilObjectSearchFactory::_getUserSearchInstance($query_parser);
                                        $user_search->setFields(array($name));
                                        $result_obj = $user_search->performSearch();

                                        // store entries
                                        $this->__storeEntries($result_obj);
                                        break;
                                
                                case FIELD_TYPE_MULTI:
                                        $multi_search = ilObjectSearchFactory::getUserMultiFieldSearchInstance($query_parser);
                                        $multi_search->setFields(array($name));
                                        $result_obj = $multi_search->performSearch();
                                        $this->__storeEntries($result_obj);
                                        break;
                                
                        }
                }
        }

        function __performGroupSearch()
        {
                include_once 'Services/Search/classes/class.ilObjectSearchFactory.php';

                $query_string = $_SESSION['rep_query']['grp']['title'];
                if(!is_object($query_parser = $this->__parseQueryString($query_string)))
                {
                        ilUtil::sendInfo($query_parser,true);
                        return false;
                }

                include_once 'Services/Search/classes/Like/class.ilLikeObjectSearch.php';
                $object_search = new ilLikeObjectSearch($query_parser);
                $object_search->setFilter(array('grp'));
                $this->__storeEntries($object_search->performSearch());

                return true;
        }

        protected function __performCourseSearch()
        {
                include_once 'Services/Search/classes/class.ilObjectSearchFactory.php';

                $query_string = $_SESSION['rep_query']['crs']['title'];
                if(!is_object($query_parser = $this->__parseQueryString($query_string)))
                {
                        ilUtil::sendInfo($query_parser,true);
                        return false;
                }

                include_once 'Services/Search/classes/Like/class.ilLikeObjectSearch.php';
                $object_search = new ilLikeObjectSearch($query_parser);
                $object_search->setFilter(array('crs'));
                $this->__storeEntries($object_search->performSearch());

                return true;
        }

        function __performRoleSearch()
        {
                include_once 'Services/Search/classes/class.ilObjectSearchFactory.php';

                $query_string = $_SESSION['rep_query']['role']['title'];
                if(!is_object($query_parser = $this->__parseQueryString($query_string)))
                {
                        ilUtil::sendInfo($query_parser,true);
                        return false;
                }
                
                // Perform like search
                include_once 'Services/Search/classes/Like/class.ilLikeObjectSearch.php';
                $object_search = new ilLikeObjectSearch($query_parser);
                $object_search->setFilter(array('role'));
                $this->__storeEntries($object_search->performSearch());

                return true;
        }

        function &__parseQueryString($a_string,$a_combination_or = true,$a_ignore_length = false)
        {
                $query_parser = new ilQueryParser(ilUtil::stripSlashes($a_string));
                $query_parser->setCombination($a_combination_or ? QP_COMBINATION_OR : QP_COMBINATION_AND);
                $query_parser->setMinWordLength(1);
                
                // #17502
                if(!(bool)$a_ignore_length)
                {
                        $query_parser->setGlobalMinLength(3); // #14768
                }
                
                $query_parser->parse();

                if(!$query_parser->validate())
                {
                        return $query_parser->getMessage();
                }
                return $query_parser;
        }

        // Private
        function __loadQueries()
        {
                if(is_array($_POST['rep_query']))
                {
                        $_SESSION['rep_query'] = $_POST['rep_query'];
                }
        }


        function __setSearchType()
        {
                // Update search type. Default to user search
                if($_POST['search_for'])
                {
                        #echo 1;
                        $_SESSION['rep_search_type'] = $_POST['search_for'];
                }
                if(!$_POST['search_for'] and !$_SESSION['rep_search_type'])
                {
                        #echo 2;
                        $_SESSION['rep_search_type'] = 'usr';
                }
                
                $this->search_type = $_SESSION['rep_search_type'];
                #echo $this->search_type;

                return true;
        }


        function __updateResults()
        {
                if(!$_SESSION['search_append'])
                {
                        $_SESSION['rep_search'] = array();
                }
                foreach($this->search_results as $result)
                {
                        $_SESSION['rep_search'][$this->search_type][] = $result;
                }
                if(!$_SESSION['rep_search'][$this->search_type])
                {
                        $_SESSION['rep_search'][$this->search_type] = array();
                }
                else
                {
                        // remove duplicate entries
                        $_SESSION['rep_search'][$this->search_type] = array_unique($_SESSION['rep_search'][$this->search_type]);
                }
                return true;
        }

        function __appendToStoredResults($a_usr_ids)
        {
                if(!$_SESSION['search_append'])
                {
                        return $_SESSION['rep_search']['usr'] = $a_usr_ids;
                }
                $_SESSION['rep_search']['usr'] = array();
                foreach($a_usr_ids as $usr_id)
                {
                        $_SESSION['rep_search']['usr'][] = $usr_id;
                }
                return $_SESSION['rep_search']['usr'] ? array_unique($_SESSION['rep_search']['usr']) : array();
        }

        function __storeEntries(&$new_res)
        {
                if($this->stored == false)
                {
                        $this->result_obj->mergeEntries($new_res);
                        $this->stored = true;
                        return true;
                }
                else
                {
                        $this->result_obj->intersectEntries($new_res);
                        return true;
                }
        }

        protected function addNewSearchButton()
        {
                include_once './Services/UIComponent/Toolbar/classes/class.ilToolbarGUI.php';
                $toolbar = new ilToolbarGUI();
                $toolbar->addButton(
                        $this->lng->txt('search_new'), 
                        $this->ctrl->getLinkTarget($this,'showSearch')
                );
                $this->tpl->setVariable('ACTION_BUTTONS',$toolbar->getHTML());
        }
        
        public function showSearchResults()
        {
                $counter = 0;
                $f_result = array();
                
                $this->tpl->addBlockFile('ADM_CONTENT','adm_content','tpl.rep_search_result.html','Services/Search');
                $this->addNewSearchButton();
                
                switch($this->search_type)
                {
                        case "usr":
                                $this->showSearchUserTable($_SESSION['rep_search']['usr'],'showSearchResults');
                                break;

                        case 'grp':
                                $this->showSearchGroupTable($_SESSION['rep_search']['grp']);
                                break;

                        case 'crs':
                                $this->showSearchCourseTable($_SESSION['rep_search']['crs']);
                                break;

                        case 'role':
                                $this->showSearchRoleTable($_SESSION['rep_search']['role']);
                                break;
                }
        }

        protected function showSearchUserTable($a_usr_ids,$a_parent_cmd)
        {
                $is_in_admin = ($_REQUEST['baseClass'] == 'ilAdministrationGUI');
                if($is_in_admin)
                {
                        // remember link target to admin search gui (this)
                        $_SESSION["usr_search_link"] = $this->ctrl->getLinkTarget($this,'show');
                }
                
                include_once './Services/Search/classes/class.ilRepositoryUserResultTableGUI.php';
                
                $table = new ilRepositoryUserResultTableGUI($this,$a_parent_cmd,$is_in_admin);
                if(count($this->add_options))
                {
                        $table->addMultiItemSelectionButton(
                                'selectedCommand',
                                $this->add_options,
                                'handleMultiCommand',
                                $this->lng->txt('execute')
                        );
                }
                else
                {
                        $table->addMultiCommand('addUser', $this->lng->txt('btn_add'));
                }
                $table->setUserLimitations($this->getUserLimitations());
                $table->parseUserIds($a_usr_ids);
                
                $this->tpl->setVariable('RES_TABLE',$table->getHTML());
        }
        
        protected function showSearchRoleTable($a_obj_ids)
        {
                include_once './Services/Search/classes/class.ilRepositoryObjectResultTableGUI.php';
                
                $table = new ilRepositoryObjectResultTableGUI($this,'showSearchResults',$this->object_selection);
                $table->parseObjectIds($a_obj_ids);
                
                $this->tpl->setVariable('RES_TABLE',$table->getHTML());
        }

        protected function showSearchGroupTable($a_obj_ids)
        {
                include_once './Services/Search/classes/class.ilRepositoryObjectResultTableGUI.php';
                
                $table = new ilRepositoryObjectResultTableGUI($this,'showSearchResults',$this->object_selection);
                $table->parseObjectIds($a_obj_ids);
                
                $this->tpl->setVariable('RES_TABLE',$table->getHTML());
        }
        
        protected function showSearchCourseTable($a_obj_ids)
        {
                include_once './Services/Search/classes/class.ilRepositoryObjectResultTableGUI.php';
                
                $table = new ilRepositoryObjectResultTableGUI($this,'showSearchResults',$this->object_selection);
                $table->parseObjectIds($a_obj_ids);
                
                $this->tpl->setVariable('RES_TABLE',$table->getHTML());
        }

        protected function listUsers()
        {
                // get parameter is used e.g. in exercises to provide
                // "add members of course" link
                if ($_GET["list_obj"] != "" && !is_array($_POST['obj']))
                {
                        $_POST['obj'][0] = $_GET["list_obj"];
                }
                if(!is_array($_POST['obj']) or !$_POST['obj'])
                {
                        ilUtil::sendFailure($this->lng->txt('select_one'));
                        $this->showSearchResults();
                        return false;
                }
                
                $_SESSION['rep_search']['objs'] = $_POST['obj'];
                
                // Get all members
                $members = array();
                foreach($_POST['obj'] as $obj_id)
                {
                        $type = ilObject::_lookupType($obj_id);
                        switch($type)
                        {
                                case 'crs':
                                case 'grp':
                                        
                                        include_once './Services/Membership/classes/class.ilParticipants.php';
                                        if(ilParticipants::hasParticipantListAccess($obj_id))
                                        {
                                                $members = array_merge((array) $members, ilParticipants::getInstanceByObjId($obj_id)->getParticipants());
                                        }
                                        break;
                                        
                                case 'role':
                                        global $rbacreview;
                                        
                                        include_once './Services/User/classes/class.ilUserFilter.php';
                                        $members = array_merge($members,  ilUserFilter::getInstance()->filter($rbacreview->assignedUsers($obj_id)));
                                        break;
                        }
                }
                $members = array_unique((array) $members);
                $this->__appendToStoredResults($members);
                
                $this->tpl->addBlockFile('ADM_CONTENT','adm_content','tpl.rep_search_result.html','Services/Search');
                
                $this->addNewSearchButton();
                $this->showSearchUserTable($_SESSION['rep_search']['usr'],'storedUserList');
                return true;
        }
        
        protected function storedUserList()
        {
                $_POST['obj'] = $_SESSION['rep_search']['objs'];
                $this->listUsers();
                return true;    
        }
        
        public function searchResultFilterListener($a_ref_id,$a_data)
        {
                if($a_data['type'] == 'usr')
                {
                        if($a_data['obj_id'] == ANONYMOUS_USER_ID)
                        {
                                return false;
                        }
                }
                return true;
        }

        public function allowObjectSelection($a_value = false)
        {
                $this->object_selection = (bool)$a_value;
        }

        protected function selectObject()
        {
                // get parameter is used e.g. in exercises to provide
                // "add members of course" link
                if ($_GET["list_obj"] != "" && !is_array($_POST['obj']))
                {
                        $_POST['obj'][0] = $_GET["list_obj"];
                }
                if(!is_array($_POST['obj']) or !$_POST['obj'])
                {
                        ilUtil::sendFailure($this->lng->txt('select_one'));
                        $this->showSearchResults();
                        return false;
                }

                $this->ctrl->setParameter($this->callback["class"], "obj", implode(";", $_POST["obj"]));
                $this->ctrl->redirect($this->callback["class"], $this->callback["method"]);
        }

        public function setUserLimitations($a_limitations)
        {
                $this->user_limitations = (bool) $a_limitations;
        }

        public function getUserLimitations()
        {
                return $this->user_limitations;
        }
}
?>