class.ilObjLinkResourceGUI.php

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<?php

/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once "./Services/Object/classes/class.ilObject2GUI.php";
include_once('./Modules/WebResource/classes/class.ilParameterAppender.php');
require_once 'Services/LinkChecker/interfaces/interface.ilLinkCheckerGUIRowHandling.php';

class ilObjLinkResourceGUI extends ilObject2GUI implements ilLinkCheckerGUIRowHandling
{
        const VIEW_MODE_VIEW = 1;
        const VIEW_MODE_MANAGE = 2;
        const VIEW_MODE_SORT = 3;
        
        const LINK_MOD_CREATE = 1;
        const LINK_MOD_EDIT = 2;
        const LINK_MOD_ADD = 3;
        
        function getType()
        {
                return "webr";
        }

        public function executeCommand()
        {
                global $ilCtrl, $ilTabs, $ilErr, $ilAccess;
                
                
                //if($this->ctrl->getTargetScript() == 'link_resources.php')
                if($_GET["baseClass"] == 'ilLinkResourceHandlerGUI')
                {
                        $_GET['view_mode'] = isset($_GET['switch_mode']) ? $_GET['switch_mode'] : $_GET['view_mode'];
                        $ilCtrl->saveParameter($this, 'view_mode');
                        $this->__prepareOutput();
                }
                        
                $this->lng->loadLanguageModule("webr");

                $next_class = $this->ctrl->getNextClass($this);
                $cmd = $this->ctrl->getCmd();
                
                switch($next_class)
                {
                        case "ilinfoscreengui":
                                $this->infoScreenForward();     // forwards command
                                break;

                        case 'ilmdeditorgui':
                                if(!$ilAccess->checkAccess('write','',$this->object->getRefId()))
                                {
                                        $ilErr->raiseError($this->lng->txt('permission_denied'),$ilErr->WARNING);
                                }
                                
                                $this->prepareOutput(); 
                                $ilTabs->activateTab('id_meta_data');
                                include_once 'Services/MetaData/classes/class.ilMDEditorGUI.php';
                                $md_gui =& new ilMDEditorGUI($this->object->getId(), 0, $this->object->getType());
                                $md_gui->addObserver($this->object,'MDUpdateListener','General');
                                $this->ctrl->forwardCommand($md_gui);
                                break;
                                
                        case 'ilpermissiongui':
                                $this->prepareOutput(); 
                                $ilTabs->activateTab('id_permissions');
                                include_once("Services/AccessControl/classes/class.ilPermissionGUI.php");
                                $perm_gui =& new ilPermissionGUI($this);
                                $ret =& $this->ctrl->forwardCommand($perm_gui);
                                break;
                                
                        case 'ilobjectcopygui':
                                $this->prepareOutput(); 
                                include_once './Services/Object/classes/class.ilObjectCopyGUI.php';
                                $cp = new ilObjectCopyGUI($this);
                                $cp->setType('webr');
                                $this->ctrl->forwardCommand($cp);
                                break;
                                
                        case 'ilexportgui':
                                $this->prepareOutput(); 
                                $this->tabs_gui->setTabActive('export');
                                include_once './Services/Export/classes/class.ilExportGUI.php';
                                $exp = new ilExportGUI($this);
                                $exp->addFormat('xml');
                                $this->ctrl->forwardCommand($exp);
                                break;
                        
                        case "ilcommonactiondispatchergui":
                                include_once("Services/Object/classes/class.ilCommonActionDispatcherGUI.php");
                                $gui = ilCommonActionDispatcherGUI::getInstanceFromAjaxCall();
                                $this->ctrl->forwardCommand($gui);
                                break;
                        
                        case "ilpropertyformgui":                                                                                                       
                                include_once './Services/Form/classes/class.ilPropertyFormGUI.php';
                                $this->initFormLink(self::LINK_MOD_EDIT);
                                $this->ctrl->forwardCommand($this->form);
                                break;
                        
                        case "ilinternallinkgui":
                                $this->lng->loadLanguageModule("content");
                                require_once("./Modules/LearningModule/classes/class.ilInternalLinkGUI.php");
                                $link_gui = new ilInternalLinkGUI("RepositoryItem", 0);
                                $link_gui->filterLinkType("PageObject");
                                $link_gui->filterLinkType("GlossaryItem");
                                $link_gui->filterLinkType("RepositoryItem");
                                $link_gui->setFilterWhiteList(true);
                                $link_gui->setMode("asynch");                   
                                $ilCtrl->forwardCommand($link_gui);
                                break;
                        
                        default:
                                if(!$cmd)
                                {
                                        $this->ctrl->setCmd("view");
                                }
                                parent::executeCommand();
                }
                
                if(!$this->getCreationMode())
                {
                        // Fill meta header tags
                        include_once('Services/MetaData/classes/class.ilMDUtils.php');
                        ilMDUtils::_fillHTMLMetaTags($this->object->getId(),$this->object->getId(),'webr');
                        
                        $this->addHeaderAction();
                }
                return true;
        }
        
        protected function initCreateForm($a_new_type)
        {
                $this->initFormLink(self::LINK_MOD_CREATE);
                return $this->form;
        }

        public function save()
        {
                global $ilCtrl;

                $this->initFormLink(self::LINK_MOD_CREATE);
                if($this->checkLinkInput(self::LINK_MOD_CREATE,0,0))
                {
                        // Save new object
                        $_POST['title'] = $_POST['tit'];
                        $_POST['desc'] = $_POST['des'];
                        parent::save();
                }
                else
                {
                        // Data incomplete or invalid
                        ilUtil::sendFailure($this->lng->txt('err_check_input'));
                        $this->form->setValuesByPost();
                        $this->tpl->setContent($this->form->getHTML());
                }
        }

        protected function afterSave(ilObject $a_new_object)
        {
                // Save link
                $this->link->setLinkResourceId($a_new_object->getId());
                $link_id = $this->link->add();
                $this->link->updateValid(true);

                ilUtil::sendSuccess($this->lng->txt('webr_link_added'));
                
                // personal workspace
                if($this->id_type == self::WORKSPACE_NODE_ID)
                {
                        $this->ctrl->redirect($this, "editLinks");                      
                }
                // repository
                else
                {
                        ilUtil::redirect("ilias.php?baseClass=ilLinkResourceHandlerGUI&ref_id=".
                                $a_new_object->getRefId()."&cmd=switchViewMode&switch_mode=2");
                }
        }
        
        protected function settings()
        {
                global $ilTabs;
        
                $this->checkPermission('write');
                $ilTabs->activateTab('id_settings');
                
                $this->initFormSettings();
                $this->tpl->setContent($this->form->getHTML());
        }
        
        protected function saveSettings()
        {
                global $ilTabs;
                
                $this->checkPermission('write');
                $ilTabs->activateTab('id_settings');
                
                $this->initFormSettings();
                if($this->form->checkInput())
                {
                        $this->object->setTitle($this->form->getInput('tit'));
                        $this->object->setDescription($this->form->getInput('des'));
                        $this->object->update();
                        
                        include_once './Services/Container/classes/class.ilContainerSortingSettings.php';
                        $sort = new ilContainerSortingSettings($this->object->getId());
                        $sort->setSortMode($this->form->getInput('sor'));
                        $sort->update();
                        
                        ilUtil::sendSuccess($this->lng->txt('settings_saved'),true);
                        $this->ctrl->redirect($this,'settings');
                }
                
                $this->form->setValuesByPost();
                ilUtil::sendFailure($this->lng->txt('err_check_input'));
                $this->tpl->setContent($this->form->getHTML());
        }
        
        
        protected function initFormSettings()
        {
                include_once './Services/Form/classes/class.ilPropertyFormGUI.php';
                $this->form = new ilPropertyFormGUI();
                $this->form->setFormAction($this->ctrl->getFormAction($this,'saveSettings'));
                $this->form->setTitle($this->lng->txt('webr_edit_settings'));
                
                // Title
                $tit = new ilTextInputGUI($this->lng->txt('webr_list_title'),'tit');
                $tit->setValue($this->object->getTitle());
                $tit->setRequired(true);
                $tit->setSize(40);
                $tit->setMaxLength(127);
                $this->form->addItem($tit);
                
                // Description
                $des = new ilTextAreaInputGUI($this->lng->txt('webr_list_desc'),'des');
                $des->setValue($this->object->getDescription());
                $des->setCols(40);
                $des->setRows(3);
                $this->form->addItem($des);
                
                // Sorting
                include_once './Services/Container/classes/class.ilContainerSortingSettings.php';
                include_once './Services/Container/classes/class.ilContainer.php';
                
                $sor = new ilRadioGroupInputGUI($this->lng->txt('webr_sorting'),'sor');
                $sor->setRequired(true);
                include_once './Services/Container/classes/class.ilContainerSortingSettings.php';
                $sor->setValue(ilContainerSortingSettings::_lookupSortMode($this->object->getId()));
                
                $opt = new ilRadioOption(
                        $this->lng->txt('webr_sort_title'),
                        ilContainer::SORT_TITLE
                );
                $sor->addOption($opt);
                
                $opm = new ilRadioOption(
                        $this->lng->txt('webr_sort_manual'),
                        ilContainer::SORT_MANUAL
                );
                $sor->addOption($opm);
                $this->form->addItem($sor);

                $this->form->addCommandButton('saveSettings', $this->lng->txt('save'));
                $this->form->addCommandButton('view', $this->lng->txt('cancel'));
        }
        

        public function editLink()
        {
                global $ilCtrl;
                
                $this->checkPermission('write');
                $this->activateTabs('content','id_content_view');
                
                if(!(int) $_GET['link_id'])
                {
                        ilUtil::sendFailure($this->lng->txt('select_one'),true);
                        $ilCtrl->redirect($this,'view');
                }
                
                $this->initFormLink(self::LINK_MOD_EDIT);
                $this->setValuesFromLink((int) $_GET['link_id']);
                $this->tpl->setContent($this->form->getHTML());
        }
        
        public function updateLink()
        {
                global $ilCtrl;

                $this->initFormLink(self::LINK_MOD_EDIT);
                if($this->checkLinkInput(self::LINK_MOD_EDIT,$this->object->getId(),(int) $_REQUEST['link_id']))
                {
                        $this->link->setLinkId((int) $_REQUEST['link_id']);
                        $this->link->update();
                        if(ilParameterAppender::_isEnabled() and is_object($this->dynamic))
                        {
                                $this->dynamic->add((int) $_REQUEST['link_id']);
                        }
                        
                        if($this->isContainerMetaDataRequired())
                        {
                                $this->object->setTitle($this->form->getInput('tit'));
                                $this->object->setDescription($this->form->getInput('des'));
                                $this->object->update();
                        }
                        
                        ilUtil::sendSuccess($this->lng->txt('settings_saved'),true);
                        $ilCtrl->redirect($this,'view');
                }
                ilUtil::sendFailure($this->lng->txt('err_check_input'));
                $this->form->setValuesByPost();
                $this->tpl->setContent($this->form->getHTML());
        }
        
        public function addLink()
        {
                $this->checkPermission('write');
                $this->activateTabs('content','id_content_view');
        
                $this->initFormLink(self::LINK_MOD_ADD);
                $this->tpl->setContent($this->form->getHTML());
        }
        
        public function saveAddLink()
        {
                global $ilCtrl;
                
                $this->checkPermission('write');
        
                $this->initFormLink(self::LINK_MOD_ADD);
                if($this->checkLinkInput(self::LINK_MOD_ADD,$this->object->getId(),0))
                {
                        if($this->isContainerMetaDataRequired())
                        {
                                // Save list data
                                $this->object->setTitle($this->form->getInput('lti'));
                                $this->object->setDescription($this->form->getInput('tde'));
                                $this->object->update();
                        }
                        
                        // Save Link
                        $link_id = $this->link->add();
                        $this->link->updateValid(true);
                        
                        // Dynamic parameters
                        if(ilParameterAppender::_isEnabled() and is_object($this->dynamic))
                        {
                                $this->dynamic->add($link_id);
                        }
                        ilUtil::sendSuccess($this->lng->txt('webr_link_added'),true);
                        $ilCtrl->redirect($this,'view');
                }
                // Error handling
                ilUtil::sendFailure($this->lng->txt('err_check_input'));
                $this->form->setValuesByPost();
                
                $this->activateTabs('content','id_content_view');
                $this->tpl->setContent($this->form->getHTML());
        }
        
        protected function deleteParameter()
        {
                global $ilCtrl;

                $this->checkPermission('write');
                
                $this->ctrl->setParameter($this,'link_id',(int) $_GET['link_id']);
                
                if(!isset($_GET['param_id']))
                {
                        ilUtil::sendFailure($this->lng->txt('select_one'),TRUE);
                        $ilCtrl->redirect($this,'view');
                }       

                include_once './Modules/WebResource/classes/class.ilParameterAppender.php';
                $param = new ilParameterAppender($this->object->getId());
                $param->delete((int) $_GET['param_id']);
                
                ilUtil::sendSuccess($this->lng->txt('links_parameter_deleted'),true);
                $ilCtrl->redirect($this,'editLinks');
        }
        
        protected function deleteParameterForm()
        {
                global $ilCtrl;

                $this->checkPermission('write');
                
                if(!isset($_GET['param_id']))
                {
                        ilUtil::sendFailure($this->lng->txt('select_one'),TRUE);
                        $ilCtrl->redirect($this,'view');
                }       

                include_once './Modules/WebResource/classes/class.ilParameterAppender.php';
                $param = new ilParameterAppender($this->object->getId());
                $param->delete((int) $_GET['param_id']);
                
                ilUtil::sendSuccess($this->lng->txt('links_parameter_deleted'),true);
                $ilCtrl->redirect($this,'view');
                
        }
        
        
        protected function updateLinks()
        {
                global $ilCtrl;
                
                $this->checkPermission('write');
                $this->activateTabs('content','');
                
                if(!is_array($_POST['ids']))
                {
                        ilUtil::sendFailure($this->lng->txt('select_one'),TRUE);
                        $ilCtrl->redirect($this,'view');
                }
                
                // Validate
                $invalid = array();
                foreach($_POST['ids'] as $link_id)
                {
                        $data = $_POST['links'][$link_id];
        
                        // handle internal links
                        if($_POST['tar_'.$link_id.'_ajax_type'] &&
                                $_POST['tar_'.$link_id.'_ajax_id'])
                        {
                                $data['tar'] = $_POST['links'][$link_id]['tar'] = 
                                        $_POST['tar_'.$link_id.'_ajax_type'].'|'.
                                        $_POST['tar_'.$link_id.'_ajax_id'];     
                        }
                        
                        
                        if(!strlen($data['tit']))
                        {
                                $invalid[] = $link_id;
                                continue;
                        }
                        if(!strlen($data['tar']))
                        {
                                $invalid[] = $link_id;
                                continue;
                        }
                        if($data['nam'] and !$data['val'])
                        {
                                $invalid[] = $link_id;
                                continue;
                        }
                        if(!$data['nam'] and $data['val'])
                        {
                                $invalid[] = $link_id;
                                continue;
                        }
                }
                
                if(count($invalid))
                {
                        ilUtil::sendFailure($this->lng->txt('err_check_input'));
                        $this->tpl->addBlockFile('ADM_CONTENT','adm_content','tpl.webr_manage.html','Modules/WebResource');
                        
                        include_once './Modules/WebResource/classes/class.ilWebResourceEditableLinkTableGUI.php';
                        $table = new ilWebResourceEditableLinkTableGUI($this,'view');
                        $table->setInvalidLinks($invalid);
                        $table->parseSelectedLinks($_POST['ids']);
                        $table->updateFromPost();
                        $this->tpl->setVariable('TABLE_LINKS',$table->getHTML());
                        return false;
                }
                
                include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
                $links = new ilLinkResourceItems($this->object->getId());
                
                // Save Settings
                foreach($_POST['ids'] as $link_id)
                {
                        $data = $_POST['links'][$link_id];
                        
                        $orig = ilLinkResourceItems::lookupItem($this->object->getId(),$link_id);
                        
                        $links->setLinkId($link_id);
                        $links->setTitle(ilUtil::stripSlashes($data['tit']));
                        $links->setDescription(ilUtil::stripSlashes($data['des']));
                        $links->setTarget(str_replace('"', '', ilUtil::stripSlashes($data['tar'])));
                        $links->setActiveStatus((int) $data['act']);
                        $links->setDisableCheckStatus((int) $data['che']);
                        $links->setLastCheckDate($orig['last_check']);
                        $links->setValidStatus((int) $data['vali']);
                        $links->update();
                        
                        if(strlen($data['nam']) and $data['val'])
                        {
                                $param = new ilParameterAppender($this->object->getId());
                                $param->setName(ilUtil::stripSlashes($data['nam']));
                                $param->setValue((int) $data['val']);
                                $param->add($link_id);
                        }

                        if($this->isContainerMetaDataRequired())
                        {
                                $this->object->setTitle(ilUtil::stripSlashes($data['tit']));
                                $this->object->setDescription(ilUtil::stripSlashes($data['des']));
                                $this->object->update();
                        }
                        
                        // TODO: Dynamic parameters
                }
                        
                ilUtil::sendSuccess($this->lng->txt('settings_saved'),TRUE);
                $ilCtrl->redirect($this,'view');                                                        
        }
        
        protected function setValuesFromLink($a_link_id)
        {
                include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
                $link = new ilLinkResourceItems($this->object->getId());
                
                $values = $link->getItem($a_link_id);
                
                if(ilParameterAppender::_isEnabled())
                {
                }
                
                $this->form->setValuesByArray(
                        array(
                                'tit'           => $values['title'],
                                'tar'           => $values['target'],
                                'des'           => $values['description'],
                                'act'           => (int) $values['active'],
                                'che'           => (int) $values['disable_check'],
                                'vali'          => (int) $values['valid']
                        )
                );                              
        }
        
        
        protected function checkLinkInput($a_mode,$a_webr_id = 0,$a_link_id = 0)
        {
                $valid = $this->form->checkInput();
                
                include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
                $this->link = new ilLinkResourceItems($a_webr_id);
                $this->link->setTarget(str_replace('"', '', ilUtil::stripSlashes($this->form->getInput('tar'))));
                $this->link->setTitle($this->form->getInput('tit'));
                $this->link->setDescription($this->form->getInput('des'));
                $this->link->setDisableCheckStatus($this->form->getInput('che'));
                
                if($a_mode == self::LINK_MOD_CREATE)
                {
                        $this->link->setActiveStatus(true);
                }
                else
                {
                        $this->link->setActiveStatus($this->form->getInput('act'));
                }
                
                if($a_mode == self::LINK_MOD_EDIT)
                {
                        $this->link->setValidStatus($this->form->getInput('vali'));
                }
                else
                {
                        $this->link->setValidStatus(true);
                }
                
                if(!ilParameterAppender::_isEnabled())
                {
                        return $valid;
                }
                
                $this->dynamic = new ilParameterAppender($a_webr_id);
                $this->dynamic->setName($this->form->getInput('nam'));
                $this->dynamic->setValue($this->form->getInput('val'));
                if(!$this->dynamic->validate())
                {
                        switch($this->dynamic->getErrorCode())
                        {
                                case LINKS_ERR_NO_NAME:
                                        $this->form->getItemByPostVar('nam')->setAlert($this->lng->txt('links_no_name_given'));
                                        return false;
                                        
                                case LINKS_ERR_NO_VALUE:
                                        $this->form->getItemByPostVar('val')->setAlert($this->lng->txt('links_no_value_given'));
                                        return false;
                                        
                                case LINKS_ERR_NO_NAME_VALUE:
                                        // Nothing entered => no error
                                        return $valid;
                        }
                        $this->dynamic = null;
                }
                return $valid;
        }

        
        protected function initFormLink($a_mode)
        {
                global $ilTabs;
        
                $ilTabs->activateTab("id_content");
                
                include_once './Services/Form/classes/class.ilPropertyFormGUI.php';
                $this->form = new ilPropertyFormGUI();
                
                switch($a_mode)
                {
                        case self::LINK_MOD_CREATE:
                                // Header
                                $this->ctrl->setParameter($this,'new_type','webr');
                                $this->form->setTitle($this->lng->txt('webr_new_link'));
                                $this->form->setTableWidth('600px');

                                // Buttons
                                $this->form->addCommandButton('save', $this->lng->txt('webr_add'));
                                $this->form->addCommandButton('cancel', $this->lng->txt('cancel'));
                                break;
                                
                        case self::LINK_MOD_ADD:
                                // Header
                                $this->form->setTitle($this->lng->txt('webr_new_link'));

                                // Buttons
                                $this->form->addCommandButton('saveAddLink', $this->lng->txt('webr_add'));
                                $this->form->addCommandButton('view', $this->lng->txt('cancel'));
                                break;

                        case self::LINK_MOD_EDIT:
                                // Header
                                $this->ctrl->setParameter($this,'link_id',(int) $_REQUEST['link_id']);
                                $this->form->setTitle($this->lng->txt('webr_edit'));
                                
                                // Buttons
                                $this->form->addCommandButton('updateLink', $this->lng->txt('save'));
                                $this->form->addCommandButton('view', $this->lng->txt('cancel'));
                                break;                  
                }
                
                
                $this->form->setFormAction($this->ctrl->getFormAction($this));
                
                if($a_mode == self::LINK_MOD_ADD and $this->isContainerMetaDataRequired())
                {
                        ilUtil::sendInfo($this->lng->txt('webr_container_info'));
                        
                        
                        $this->form->setTitle($this->lng->txt('webr_edit_list'));
                        
                        // List Title
                        $title = new ilTextInputGUI($this->lng->txt('webr_list_title'),'lti');
                        $title->setRequired(true);
                        $title->setSize(40);
                        $title->setMaxLength(127);
                        $this->form->addItem($title);
                        
                        // List Description
                        $desc = new ilTextAreaInputGUI($this->lng->txt('webr_list_desc'),'tde');
                        $desc->setRows(3);
                        $desc->setCols(40);
                        $this->form->addItem($desc);
                        
                        // Addtional section
                        $sect = new ilFormSectionHeaderGUI();
                        $sect->setTitle($this->lng->txt('webr_add'));
                        $this->form->addItem($sect);
                }

                // Target
                /*
                $tar = new ilTextInputGUI($this->lng->txt('webr_link_target'),'tar');
                $tar->setValue("http://");
                
                $tar->setSize(40);
                $tar->setMaxLength(500);
                */
                include_once 'Services/Form/classes/class.ilLinkInputGUI.php';
                $tar = new ilLinkInputGUI($this->lng->txt('webr_link_target'),'tar');
                $tar->setInternalLinkFilterTypes(array("PageObject", "GlossaryItem", "RepositoryItem"));
                
                $tar->setRequired(true);
                $this->form->addItem($tar);             
                
                // Title
                $tit = new ilTextInputGUI($this->lng->txt('webr_link_title'),'tit');
                $tit->setRequired(true);
                $tit->setSize(40);
                $tit->setMaxLength(127);
                $this->form->addItem($tit);
                
                // Description
                $des = new ilTextAreaInputGUI($this->lng->txt('description'),'des');
                $des->setRows(3);
                $des->setCols(40);
                $this->form->addItem($des);
                
                
                if($a_mode != self::LINK_MOD_CREATE)
                {
                        // Active
                        $act = new ilCheckboxInputGUI($this->lng->txt('active'),'act');
                        $act->setChecked(true);
                        $act->setValue(1);
                        $this->form->addItem($act);

                        // Check
                        $che = new ilCheckboxInputGUI($this->lng->txt('webr_disable_check'),'che');
                        $che->setValue(1);
                        $this->form->addItem($che);
                }
                
                // Valid
                if($a_mode == self::LINK_MOD_EDIT)
                {
                        $val = new ilCheckboxInputGUI($this->lng->txt('valid'),'vali');
                        $this->form->addItem($val);
                }
                
                if(ilParameterAppender::_isEnabled() && $a_mode != self::LINK_MOD_CREATE)
                {
                        $dyn = new ilNonEditableValueGUI($this->lng->txt('links_dyn_parameter'));
                        $dyn->setInfo($this->lng->txt('links_dynamic_info'));
                        
                        
                        if(count($links = ilParameterAppender::_getParams((int) $_GET['link_id'])))
                        {
                                $ex = new ilCustomInputGUI($this->lng->txt('links_existing_params'),'ex');
                                $dyn->addSubItem($ex);
                                
                                foreach($links as $id => $link)
                                {
                                        $p = new ilCustomInputGUI();
                                        
                                        $ptpl = new ilTemplate('tpl.link_dyn_param_edit.html',true,true,'Modules/WebResource');
                                        $ptpl->setVariable('INFO_TXT',ilParameterAppender::parameterToInfo($link['name'], $link['value']));
                                        $this->ctrl->setParameter($this,'param_id',$id);
                                        $ptpl->setVariable('LINK_DEL',$this->ctrl->getLinkTarget($this,'deleteParameterForm'));
                                        $ptpl->setVariable('LINK_TXT',$this->lng->txt('delete'));
                                        $p->setHtml($ptpl->get());
                                        $dyn->addSubItem($p);
                                }
                        }
                        
                        // Existing parameters
                        
                        // New parameter
                        if($a_mode != self::LINK_MOD_CREATE)
                        {
                                #$new = new ilCustomInputGUI($this->lng->txt('links_add_param'),'');
                                #$dyn->addSubItem($new);
                        }
                        
                        // Dynyamic name
                        $nam = new ilTextInputGUI($this->lng->txt('links_name'),'nam');
                        $nam->setSize(12);
                        $nam->setMaxLength(128);
                        $dyn->addSubItem($nam);
                        
                        // Dynamic value
                        $val = new ilSelectInputGUI($this->lng->txt('links_value'),'val');
                        $val->setOptions(ilParameterAppender::_getOptionSelect());
                        $val->setValue(0);
                        $dyn->addSubItem($val);
                        
                        $this->form->addItem($dyn);
                }
        }
        
        protected function isContainerMetaDataRequired()
        {
                include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
                return ilLinkResourceItems::lookupNumberOfLinks($this->object->getId()) == 1;
        }
        
        protected function switchViewMode()
        {
                global $ilCtrl;
                
                $_REQUEST['view_mode'] = $_GET['view_mode'] = (int) $_GET['switch_mode'];
                $this->view();
        }
        
        protected function editLinks()
        {
                $_GET['switch_mode'] = self::VIEW_MODE_MANAGE;
                $this->switchViewMode();
        }
        

        public function view()
        {
                global $ilErr, $ilTabs;
                
                $ilTabs->activateTab("id_content");
                
                $this->checkPermission('read');
                
                if (strtolower($_GET["baseClass"]) == "iladministrationgui")
                {
                        parent::view();
                        return true;
                }
                else
                {
                        switch((int) $_REQUEST['view_mode'])
                        {
                                case self::VIEW_MODE_MANAGE:
                                        $this->manage();
                                        break;
                                        
                                case self::VIEW_MODE_SORT:
                                        $this->sort();
                                        break;
                                
                                default:
                                        $this->showLinks();
                                        break;
                        }
                }
                $GLOBALS['tpl']->setPermanentLink($this->object->getType(),$this->object->getRefId());
                return true;
        }
        
        protected function manage()
        {                                               
                $this->checkPermission('write');
                $this->activateTabs('content','id_content_manage');
                
                $this->tpl->addBlockFile('ADM_CONTENT','adm_content','tpl.webr_manage.html','Modules/WebResource');
                $this->showToolbar('ACTION_BUTTONS');
                
                include_once './Modules/WebResource/classes/class.ilWebResourceEditableLinkTableGUI.php';
                $table = new ilWebResourceEditableLinkTableGUI($this,'view');
                $table->parse();
                
                include_once './Modules/LearningModule/classes/class.ilInternalLinkGUI.php';
                $js = ilInternalLinkGUI::getInitHTML("");
                
                $this->tpl->addJavaScript("Modules/WebResource/js/intLink.js");
                $this->tpl->addJavascript("Services/Form/js/Form.js");

                $this->tpl->setVariable('TABLE_LINKS',$table->getHTML().$js);
        }
        
        protected function showLinks()
        {
                $this->checkPermission('read');
                $this->activateTabs('content','id_content_view');
                
                include_once './Modules/WebResource/classes/class.ilWebResourceLinkTableGUI.php';
                $table = new ilWebResourceLinkTableGUI($this,'showLinks');
                $table->parse();
                
                $this->tpl->addBlockFile('ADM_CONTENT','adm_content','tpl.webr_view.html','Modules/WebResource');
                $this->showToolbar('ACTION_BUTTONS');
                $this->tpl->setVariable('LINK_TABLE',$table->getHTML());
        }
        
        protected function sort()
        {
                $this->checkPermission('write');
                $this->activateTabs('content','id_content_ordering');
                
                include_once './Modules/WebResource/classes/class.ilWebResourceLinkTableGUI.php';
                $table = new ilWebResourceLinkTableGUI($this,'sort',true);
                $table->parse();
                
                $this->tpl->addBlockFile('ADM_CONTENT','adm_content','tpl.webr_view.html','Modules/WebResource');
                $this->showToolbar('ACTION_BUTTONS');
                $this->tpl->setVariable('LINK_TABLE',$table->getHTML());
        }
        
        protected function saveSorting()
        {
                $this->checkPermission('write');
                
                include_once './Services/Container/classes/class.ilContainerSorting.php';
                $sort = ilContainerSorting::_getInstance($this->object->getId());
                $sort->savePost((array) $_POST['position']);
                
                ilUtil::sendSuccess($this->lng->txt('settings_saved'),true);
                $this->view();
        }
        
        
        protected function showToolbar($a_tpl_var)
        {
                if(!$this->checkPermissionBool('write'))
                {
                        return;
                }
                
                include_once './Services/UIComponent/Toolbar/classes/class.ilToolbarGUI.php';
                $tool = new ilToolbarGUI();
                $tool->setFormAction($this->ctrl->getFormAction($this));
                $tool->addButton(
                        $this->lng->txt('webr_add'),
                        $this->ctrl->getLinkTarget($this,'addLink')
                );
                
                $this->tpl->setVariable($a_tpl_var,$tool->getHTML());
                return;
        }
        
        protected function confirmDeleteLink()
        {
                $this->checkPermission('write');
                $this->activateTabs('content','id_content_view');
                
                $link_ids = array();

                if(is_array($_POST['link_ids']))
                {
                        $link_ids =$_POST['link_ids'];
                }
                elseif(isset($_GET['link_id']))
                {
                        $link_ids = array($_GET['link_id']);
                }

                if(!count($link_ids) > 0)
                {
                        ilUtil::sendFailure($this->lng->txt('select_one'));
                        $this->view();
                        return false;
                }
                
                include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
                $links = new ilLinkResourceItems($this->object->getId());
                
                include_once 'Services/Utilities/classes/class.ilConfirmationGUI.php';
                $confirm = new ilConfirmationGUI();
                $confirm->setFormAction($this->ctrl->getFormAction($this,'view'));
                $confirm->setHeaderText($this->lng->txt('webr_sure_delete_items'));
                $confirm->setConfirm($this->lng->txt('delete'), 'deleteLinks');
                $confirm->setCancel($this->lng->txt('cancel'), 'view');
                
                foreach($link_ids as $link_id)
                {
                        $link = $links->getItem($link_id);
                        $confirm->addItem('link_ids[]', $link_id,$link['title']);
                }
                $this->tpl->setContent($confirm->getHTML());
        }
        
        protected function deleteLinks()
        {
                global $ilCtrl;
                
                $this->checkPermission('write');
                
                include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
                $links = new ilLinkResourceItems($this->object->getId());
                
                foreach($_POST['link_ids'] as $link_id)
                {
                        $links->delete($link_id);
                }
                ilUtil::sendSuccess($this->lng->txt('webr_deleted_items'),true);
                $ilCtrl->redirect($this,'view');
        }
        
        protected function deactivateLink()
        {
                global $ilCtrl;
                
                $this->checkPermission('write');
                
                include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
                $links = new ilLinkResourceItems($this->object->getId());

                if(!$_GET['link_id'])
                {
                        ilUtil::sendFailure($this->lng->txt('select_one'),true);
                        $ilCtrl->redirect($this,'view');
                }
                
                $links->setLinkId((int) $_GET['link_id']);
                $links->updateActive(false);
                
                ilUtil::sendSuccess($this->lng->txt('webr_inactive_success'),true);
                $ilCtrl->redirect($this,'view');
        }
        

        function infoScreen()
        {
                $this->ctrl->setCmd("showSummary");
                $this->ctrl->setCmdClass("ilinfoscreengui");
                $this->infoScreenForward();
        }

        function infoScreenForward()
        {
                global $ilTabs;

                $this->checkPermission('visible');
                $ilTabs->activateTab('id_info');

                include_once("./Services/InfoScreen/classes/class.ilInfoScreenGUI.php");
                $info = new ilInfoScreenGUI($this);
                
                $info->enablePrivateNotes();
                
                // standard meta data
                $info->addMetaDataSections($this->object->getId(),0, $this->object->getType());
                
                if($this->id_type == self::WORKSPACE_NODE_ID)
                {                       
                        $info->addProperty($this->lng->txt("perma_link"), $this->getPermanentLinkWidget());
                }
                
                // forward the command
                $this->ctrl->forwardCommand($info);
        }


        function history()
        {
                global $ilTabs;
                
                $this->checkPermission('write');
                $ilTabs->activateTab('id_history');

                include_once("./Services/History/classes/class.ilHistoryGUI.php");
                
                $hist_gui =& new ilHistoryGUI($this->object->getId());
                
                $hist_html = $hist_gui->getHistoryTable(array("ref_id" => $_GET["ref_id"], 
                                                                                                          "cmd" => "history",
                                                                                                          "cmdClass" =>$_GET["cmdClass"],
                                                                                                          "cmdNode" =>$_GET["cmdNode"]));
                
                $this->tpl->setVariable("ADM_CONTENT", $hist_html);
        }
        
        public function formatInvalidLinkArray(Array $row)
        {
                $this->object->items_obj->readItem($row['page_id']);
                $row['title'] = $this->object->items_obj->getTitle();   
        
                require_once 'Services/UIComponent/AdvancedSelectionList/classes/class.ilAdvancedSelectionListGUI.php';
                $actions = new ilAdvancedSelectionListGUI();
                $actions->setSelectionHeaderClass('small');     
                $actions->setItemLinkClass('xsmall');           
                $actions->setListTitle($this->lng->txt('actions'));             
                $actions->setId($row['page_id']);
                $this->ctrl->setParameter($this, 'link_id', $row['page_id']);           
                $actions->addItem(
                        $this->lng->txt('edit'),
                        '',
                        $this->ctrl->getLinkTarget($this, 'editLink')
                );
                $this->ctrl->clearParameters($this);
                $row['action_html'] = $actions->getHTML();              
                
                return $row;
        }

        protected function linkChecker()
        {
                global $ilias, $ilUser, $tpl, $ilTabs;
                
                $this->checkPermission('write');
                $ilTabs->activateTab('id_link_check');

                $this->__initLinkChecker();
                $this->object->initLinkResourceItemsObject();
                
                require_once './Services/LinkChecker/classes/class.ilLinkCheckerTableGUI.php';
                
                $toolbar = new ilToolbarGUI();

                if((bool)$ilias->getSetting('cron_web_resource_check'))
                {
                        include_once './Services/LinkChecker/classes/class.ilLinkCheckNotify.php';
                        include_once 'Services/Form/classes/class.ilPropertyFormGUI.php';
                        
                        $chb = new ilCheckboxInputGUI($this->lng->txt('link_check_message_a'), 'link_check_message');
                        $chb->setValue(1);
                        $chb->setChecked((bool)ilLinkCheckNotify::_getNotifyStatus($ilUser->getId(), $this->object->getId()));
                        $chb->setOptionTitle($this->lng->txt('link_check_message_b'));
                        
                        $toolbar->addInputItem($chb);
                        $toolbar->addFormButton($this->lng->txt('save'), 'saveLinkCheck');
                        $toolbar->setFormAction($this->ctrl->getLinkTarget($this, 'saveLinkCheck'));
                }

                $tgui = new ilLinkCheckerTableGUI($this, 'linkChecker');
                $tgui->setLinkChecker($this->link_checker_obj)
                         ->setRowHandler($this)
                         ->setRefreshButton($this->lng->txt('refresh'), 'refreshLinkCheck');

                return $tpl->setContent($tgui->prepareHTML()->getHTML().$toolbar->getHTML());
        }
        
        function saveLinkCheck()
        {
                global $ilDB,$ilUser;

                include_once './Services/LinkChecker/classes/class.ilLinkCheckNotify.php';

                $link_check_notify =& new ilLinkCheckNotify($ilDB);
                $link_check_notify->setUserId($ilUser->getId());
                $link_check_notify->setObjId($this->object->getId());

                if($_POST['link_check_message'])
                {
                        ilUtil::sendSuccess($this->lng->txt('link_check_message_enabled'));
                        $link_check_notify->addNotifier();
                }
                else
                {
                        ilUtil::sendSuccess($this->lng->txt('link_check_message_disabled'));
                        $link_check_notify->deleteNotifier();
                }
                $this->linkChecker();

                return true;
        }
                


        function refreshLinkCheck()
        {
                $this->__initLinkChecker();

                if(!$this->link_checker_obj->checkPear())
                {
                        ilUtil::sendFailure($this->lng->txt('missing_pear_library'));
                        $this->linkChecker();

                        return false;
                }


                $this->object->initLinkResourceItemsObject();

                // Set all link to valid. After check invalid links will be set to invalid
                $this->object->items_obj->updateValidByCheck();
                
                foreach($this->link_checker_obj->checkWebResourceLinks() as $invalid)
                {
                        $this->object->items_obj->readItem($invalid['page_id']);
                        $this->object->items_obj->setActiveStatus(false);
                        $this->object->items_obj->setValidStatus(false);
                        $this->object->items_obj->update(false);
                }
                
                $this->object->items_obj->updateLastCheck();
                ilUtil::sendSuccess($this->lng->txt('link_checker_refreshed'));

                $this->linkChecker();

                return true;
        }

        function __initLinkChecker()
        {
                global $ilDB;

                include_once './Services/LinkChecker/classes/class.ilLinkChecker.php';

                $this->link_checker_obj =& new ilLinkChecker($ilDB,false);
                $this->link_checker_obj->setObjId($this->object->getId());

                return true;
        }
        
        
        protected function activateTabs($a_active_tab,$a_active_subtab = '')
        {
                global $ilCtrl, $ilTabs, $lng;
                
                switch($a_active_tab)
                {
                        case 'content':
                                if($this->checkPermissionBool('write'))
                                {
                                        $this->lng->loadLanguageModule('cntr');
                                        
                                        $this->ctrl->setParameter($this,'switch_mode',self::VIEW_MODE_VIEW);
                                        $ilTabs->addSubTab('id_content_view',
                                                $lng->txt('view'),
                                                $this->ctrl->getLinkTarget($this,'switchViewMode')
                                        );
                                        $this->ctrl->setParameter($this,'switch_mode',self::VIEW_MODE_MANAGE);
                                        $ilTabs->addSubTab('id_content_manage',
                                                $lng->txt('cntr_manage'),
                                                $this->ctrl->getLinkTarget($this,'switchViewMode')
                                        );
                                        include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
                                        include_once './Services/Container/classes/class.ilContainerSortingSettings.php';
                                        include_once './Services/Container/classes/class.ilContainer.php';
                                        if((ilLinkResourceItems::lookupNumberOfLinks($this->object->getId()) > 1)
                                                and ilContainerSortingSettings::_lookupSortMode($this->object->getId()) == ilContainer::SORT_MANUAL)
                                        {
                                                $this->ctrl->setParameter($this,'switch_mode',self::VIEW_MODE_SORT);
                                                $ilTabs->addSubTab('id_content_ordering',
                                                        $this->lng->txt('cntr_ordering'),
                                                        $this->ctrl->getLinkTarget($this,'switchViewMode')
                                                );
                                        }
                                        
                                        $ilCtrl->clearParameters($this);
                                        $ilTabs->activateSubTab($a_active_subtab);
                                }                               
                }
                
                $ilTabs->activateTab('id_content');
        }
        
        
        function setTabs()
        {
                global $ilTabs, $lng, $ilHelp;
                
                $ilHelp->setScreenIdComponent("webr");
                
                if ($this->checkPermissionBool('read'))
                {
                        $ilTabs->addTab("id_content",
                                $lng->txt("content"),
                                $this->ctrl->getLinkTarget($this, "view"));
                }
                
                if ($this->checkPermissionBool('visible'))
                {
                        $ilTabs->addTab("id_info",
                                $lng->txt("info_short"),
                                $this->ctrl->getLinkTarget($this, "infoScreen"));
                }
                
                if($this->checkPermissionBool('write') and !$this->getCreationMode())
                {
                        include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
                        if(ilLinkResourceItems::lookupNumberOfLinks($this->object->getId()) > 1)
                        {
                                $ilTabs->addTab("id_settings",
                                        $lng->txt("settings"),
                                        $this->ctrl->getLinkTarget($this, "settings"));
                        }
                        
                }

                if ($this->checkPermissionBool('write'))
                {
                        $ilTabs->addTab("id_history",
                                $lng->txt("history"),
                                $this->ctrl->getLinkTarget($this, "history"));
                }

                if ($this->checkPermissionBool('write'))
                {
                        // Check if pear library is available
                        if(@include_once('HTTP/Request.php'))
                        {
                                $ilTabs->addTab("id_link_check",
                                        $lng->txt("link_check"),
                                        $this->ctrl->getLinkTarget($this, "linkChecker"));
                        }
                }

                if ($this->checkPermissionBool('write'))
                {
                        $ilTabs->addTab("id_meta_data",
                                $lng->txt("meta_data"),
                                $this->ctrl->getLinkTargetByClass('ilmdeditorgui','listSection'));
                }

                if($this->checkPermissionBool('write'))
                {
                        $ilTabs->addTab(
                                'export',
                                $this->lng->txt('export'),
                                $this->ctrl->getLinkTargetByClass('ilexportgui','')
                        );
                }

                // will add permission tab if needed
                parent::setTabs();
        }

        // PRIVATE
        function __prepareOutput()
        {
                // output objects
                $this->tpl->addBlockFile("CONTENT", "content", "tpl.adm_content.html");
                $this->tpl->addBlockFile("STATUSLINE", "statusline", "tpl.statusline.html");

                // output locator
                $this->__setLocator();

                // output message
                if ($this->message)
                {
                        ilUtil::sendInfo($this->message);
                }

                // display infopanel if something happened
                ilUtil::infoPanel();;
        }

        function __setLocator()
        {
                global $tree;
                global $lng, $ilCtrl;

                $this->tpl->addBlockFile("LOCATOR", "locator", "tpl.locator.html", "Services/Locator");

                $counter = 0;
                
                //$this->tpl->touchBlock('locator_separator');
                //$this->tpl->touchBlock('locator_item');
                
                foreach ($tree->getPathFull($this->object->getRefId()) as $key => $row)
                {
                        
                        //if ($row["child"] == $tree->getRootId())
                        //{
                        //      continue;
                        //}
                        
                        if($counter++)
                        {
                                $this->tpl->touchBlock('locator_separator_prefix');
                        }

                        if ($row["child"] > 0)
                        {
                                $this->tpl->setCurrentBlock("locator_img");
                                $this->tpl->setVariable("IMG_SRC",
                                        ilUtil::getImagePath("icon_".$row["type"]."_s.png"));
                                $this->tpl->setVariable("IMG_ALT",
                                        $lng->txt("obj_".$type));
                                $this->tpl->parseCurrentBlock();
                        }

                        $this->tpl->setCurrentBlock("locator_item");

                        if($row["type"] == 'webr')
                        {
                                $this->tpl->setVariable("ITEM",$this->object->getTitle());
                                $this->tpl->setVariable("LINK_ITEM",$this->ctrl->getLinkTarget($this));
                        }
                        elseif ($row["child"] != $tree->getRootId())
                        {
                                $ilCtrl->setParameterByClass("ilrepositorygui", "ref_id", $row["child"]);
                                $this->tpl->setVariable("ITEM", $row["title"]);
                                $this->tpl->setVariable("LINK_ITEM",
                                        $ilCtrl->getLinkTargetByClass("ilrepositorygui", ""));
                        }
                        else
                        {
                                $ilCtrl->setParameterByClass("ilrepositorygui", "ref_id", $row["child"]);
                                $this->tpl->setVariable("ITEM", $this->lng->txt("repository"));
                                $this->tpl->setVariable("LINK_ITEM",
                                        $ilCtrl->getLinkTargetByClass("ilrepositorygui", ""));
                        }
                        $ilCtrl->setParameterByClass("ilrepositorygui", "ref_id", $_GET["ref_id"]);

                        $this->tpl->parseCurrentBlock();
                }

                $this->tpl->setVariable("TXT_LOCATOR",$this->lng->txt("locator"));
                $this->tpl->parseCurrentBlock();
        }
        
        function callDirectLink()
        {
                $obj_id = $this->object->getId();
                
                
                include_once("./Services/Link/classes/class.ilLink.php");
                include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
                if(ilLinkResourceItems::_isSingular($obj_id))
                {
                        $url = ilLinkResourceItems::_getFirstLink($obj_id);
                        
                        include_once "Services/Form/classes/class.ilFormPropertyGUI.php";
                        include_once "Services/Form/classes/class.ilLinkInputGUI.php";                                                          
                        if(ilLinkInputGUI::isInternalLink($url["target"]))                      
                        {
                                // #10612
                                $parts = explode("|", $url["target"]);
                                if ($parts[0] == "page")
                                {
                                        $parts[0] = "pg";
                                }
                                if ($parts[0] == "term")
                                {
                                        $parts[0] = "git";
                                }
                                $url["target"] = ilLink::_getStaticLink($parts[1], $parts[0]);
                        }
                        
                        include_once './Modules/WebResource/classes/class.ilParameterAppender.php';
                        if(ilParameterAppender::_isEnabled())
                        {
                           $url = ilParameterAppender::_append($url);
                        }               
                        
                        $this->redirectToLink($this->ref_id, $obj_id, $url["target"]);
                }                               
        }
        
        function callLink()
        {
                if($_REQUEST["link_id"])
                {               
                        $obj_id = $this->object->getId();
                        
                        include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
                        $items = new ilLinkResourceItems($obj_id);
                        $item = $items->getItem($_REQUEST["link_id"]);
                        if($item["target"])
                        {
                                // #15647 - handle internal links
                                include_once "Services/Form/classes/class.ilFormPropertyGUI.php";
                                include_once "Services/Form/classes/class.ilLinkInputGUI.php";                                                          
                                if(ilLinkInputGUI::isInternalLink($item["target"]))
                                {                               
                                        $parts = explode("|", $item["target"]);
                                        if ($parts[0] == "page")
                                        {
                                                $parts[0] = "pg";
                                        }
                                        include_once("./Services/Link/classes/class.ilLink.php");
                                        $item["target"] = ilLink::_getStaticLink($parts[1], $parts[0]);
                                        if ($parts[0] == "term")
                                        {
                                                $parts[0] = "git";
                                                $item["target"] =
                                                        ilLink::_getStaticLink(0,
                                                                $parts[0],
                                                                true,
                                                                "&target=git_".$parts[1]);
                                        }
                                }
                                include_once './Modules/WebResource/classes/class.ilParameterAppender.php';
                                if(ilParameterAppender::_isEnabled())
                                {
                                   $item = ilParameterAppender::_append($item);
                                }
//var_dump($item); exit;
                                $this->redirectToLink($this->ref_id, $obj_id, $item["target"]);
                        }
                }
        }
        
        protected function redirectToLink($a_ref_id, $a_obj_id, $a_url)
        {
                global $ilUser;
                
                if($a_url)
                {
                        require_once('Services/Tracking/classes/class.ilChangeEvent.php');
                        ilChangeEvent::_recordReadEvent("webr", $a_ref_id, $a_obj_id,
                                $ilUser->getId());
                        
                        ilUtil::redirect($a_url);
                }               
        }

        function _goto($a_target, $a_additional = null)
        {
                global $ilAccess, $ilErr, $lng;
                                
                if($a_additional && substr($a_additional, -3) == "wsp")
                {
                        $_GET["baseClass"] = "ilsharedresourceGUI";     
                        $_GET["wsp_id"] = $a_target;            
                        include("ilias.php");
                        exit;
                }

                // Will be replaced in future releases by ilAccess::checkAccess()
                if ($ilAccess->checkAccess("read", "", $a_target))
                {
                        ilUtil::redirect("ilias.php?baseClass=ilLinkResourceHandlerGUI&ref_id=$a_target");
                }
                else
                {
                        // to do: force flat view
                        if ($ilAccess->checkAccess("visible", "", $a_target))
                        {
                                ilUtil::redirect("ilias.php?baseClass=ilLinkResourceHandlerGUI&ref_id=".$a_target."&cmd=infoScreen");
                        }
                        else
                        {
                                if ($ilAccess->checkAccess("read", "", ROOT_FOLDER_ID))
                                {
                                        ilUtil::sendFailure(sprintf($lng->txt("msg_no_perm_read_item"),
                                                ilObject::_lookupTitle(ilObject::_lookupObjId($a_target))), true);
                                        ilObjectGUI::_gotoRepositoryRoot();
                                }
                        }
                }

                $ilErr->raiseError($lng->txt("msg_no_perm_read"), $ilErr->FATAL);
        }
} // END class.ilObjLinkResource
?>