class.ilObjFileGUI.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";
require_once "./Modules/File/classes/class.ilObjFile.php";
require_once "./Modules/File/classes/class.ilObjFileAccess.php";

class ilObjFileGUI extends ilObject2GUI
{
        protected $log = null;

        function __construct($a_id = 0, $a_id_type = self::REPOSITORY_NODE_ID, $a_parent_node_id = 0)
        {
                $this->log = ilLoggerFactory::getLogger('file');
                parent::__construct($a_id, $a_id_type, $a_parent_node_id);
        }

        function getType()
        {
                return "file";
        }

        // ???
        function _forwards()
        {
                return array();
        }
        
        function executeCommand()
        {
                global $ilNavigationHistory, $ilCtrl, $ilUser, $ilTabs, $ilAccess, $ilErr;
                
                $next_class = $this->ctrl->getNextClass($this);
                $cmd = $this->ctrl->getCmd();
                
                if($this->id_type == self::WORKSPACE_NODE_ID)
                {
                        include_once "Services/Form/classes/class.ilFileInputGUI.php";
                        ilFileInputGUI::setPersonalWorkspaceQuotaCheck(true);
                }

                if(!$this->getCreationMode())
                {
                        // do not move this payment block!!
                        if(IS_PAYMENT_ENABLED)
                        {
                                include_once './Services/Payment/classes/class.ilPaymentObject.php';
                                if(ANONYMOUS_USER_ID == $ilUser->getId() && isset($_GET['transaction']))
                                {
                                        $transaction = $_GET['transaction'];
                                        include_once './Services/Payment/classes/class.ilPaymentBookings.php';
                                        $valid_transaction = ilPaymentBookings::_readBookingByTransaction($transaction);
                                }
                        
                                if(ilPaymentObject::_requiresPurchaseToAccess($this->node_id, $type = (isset($_GET['purchasetype'])
                                                ? $_GET['purchasetype'] : NULL) ))
                                {
                                        $this->setLocator();
                                        $this->tpl->getStandardTemplate();

                                        include_once './Services/Payment/classes/class.ilShopPurchaseGUI.php';
                                        $pp = new ilShopPurchaseGUI((int)$this->node_id);
                                        $ret = $this->ctrl->forwardCommand($pp);
                                        return true;
                                }
                        }
                        else if($this->id_type == self::REPOSITORY_NODE_ID 
                                && $this->checkPermissionBool("read"))
                        {
                                $ilCtrl->setParameterByClass("ilrepositorygui", "ref_id", $this->node_id);
                                $link = $ilCtrl->getLinkTargetByClass("ilrepositorygui", "infoScreen");
                                $ilCtrl->setParameterByClass("ilrepositorygui", "ref_id", $_GET["ref_id"]);                             

                                // add entry to navigation history
                                $ilNavigationHistory->addItem($this->node_id,
                                        $link, "file");
                        }
                }
                
                $this->prepareOutput();
                
                switch ($next_class)
                {
                        case "ilinfoscreengui":
                                $this->infoScreenForward();     // forwards command
                                break;

                        case 'ilobjectmetadatagui':                                                             
                                if(!$this->checkPermissionBool("write"))
                                {
                                        $ilErr->raiseError($this->lng->txt('permission_denied'),$ilErr->WARNING);
                                }                       
                                
                                $ilTabs->activateTab("id_meta");

                                include_once 'Services/Object/classes/class.ilObjectMetaDataGUI.php';
                                $md_gui = new ilObjectMetaDataGUI($this->object);       
                                
                                // todo: make this work
                                // $md_gui->addMDObserver($this->object,'MDUpdateListener','Technical');
                                
                                $this->ctrl->forwardCommand($md_gui);
                                break;
                                
                        // repository permissions
                        case 'ilpermissiongui':
                                $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 "ilexportgui":
                                if(!$this->checkPermissionBool("write"))
                                {
                                        $ilErr->raiseError($this->lng->txt('permission_denied'),$ilErr->WARNING);
                                }
                                $ilTabs->activateTab("export");
                                include_once("./Services/Export/classes/class.ilExportGUI.php");
                                $exp_gui = new ilExportGUI($this);
                                $exp_gui->addFormat("xml");
                                $ret = $this->ctrl->forwardCommand($exp_gui);
                                break;

                        case 'ilobjectcopygui':
                                include_once './Services/Object/classes/class.ilObjectCopyGUI.php';
                                $cp = new ilObjectCopyGUI($this);
                                $cp->setType('file');
                                $this->ctrl->forwardCommand($cp);
                                break;
                        
                        // personal workspace permissions
                        case "ilworkspaceaccessgui";                            
                                $ilTabs->activateTab("id_permissions");
                                include_once('./Services/PersonalWorkspace/classes/class.ilWorkspaceAccessGUI.php');
                                $wspacc = new ilWorkspaceAccessGUI($this->node_id, $this->getAccessHandler());
                                $this->ctrl->forwardCommand($wspacc);
                                break;
                        
                        case "ilcommonactiondispatchergui":
                                include_once("Services/Object/classes/class.ilCommonActionDispatcherGUI.php");
                                $gui = ilCommonActionDispatcherGUI::getInstanceFromAjaxCall();
                                $this->ctrl->forwardCommand($gui);
                                break;
                        
                        case "illearningprogressgui":
                                $ilTabs->activateTab('learning_progress');
                                require_once 'Services/Tracking/classes/class.ilLearningProgressGUI.php';
                                $new_gui =& new ilLearningProgressGUI(
                                        ilLearningProgressGUI::LP_CONTEXT_REPOSITORY,
                                        $this->object->getRefId(),
                                        $_GET['user_id'] ? $_GET['user_id'] : $ilUser->getId()
                                );
                                $this->ctrl->forwardCommand($new_gui);
                                $this->tabs_gui->setTabActive('learning_progress');
                                break;
                        
                        default:
                                // in personal workspace use object2gui 
                                if($this->id_type == self::WORKSPACE_NODE_ID)
                                {
                                        $this->addHeaderAction();
                                        
                                        // coming from goto we need default command
                                        if (empty($cmd))
                                        {
                                                $ilCtrl->setCmd("infoScreen");
                                        }
                                        $ilTabs->clearTargets();
                                        return parent::executeCommand();
                                }
                                
                                if (empty($cmd))
                                {
                                        $cmd = "infoScreen";
                                }

                                $this->$cmd();
                                break;
                }               
                
                $this->addHeaderAction();
        }
        
        protected function initCreationForms()
        {                               
                $forms = array();               
                        
                if($this->id_type == self::WORKSPACE_NODE_ID)
                {
                        include_once "Services/DiskQuota/classes/class.ilDiskQuotaHandler.php";
                        if(!ilDiskQuotaHandler::isUploadPossible())
                        {                               
                                $this->lng->loadLanguageModule("file");
                                ilUtil::sendFailure($this->lng->txt("personal_workspace_quota_exceeded_warning"), true);
                                $this->ctrl->redirect($this, "cancel");
                        }
                }
                
                // use drag-and-drop upload if configured
                require_once("Services/FileUpload/classes/class.ilFileUploadSettings.php");
                if (ilFileUploadSettings::isDragAndDropUploadEnabled())
                {
                        $forms[] = $this->initMultiUploadForm();
                }
                else
                {
                        $forms[] = $this->initSingleUploadForm();
                        $forms[] = $this->initZipUploadForm();
                }

                // repository only
                if($this->id_type != self::WORKSPACE_NODE_ID)
                {
                        $forms[self::CFORM_IMPORT] = $this->initImportForm('file');
                        $forms[self::CFORM_CLONE] = $this->fillCloneTemplate(null, "file");             
                }                       
                
                return $forms;
        }

        public function initSingleUploadForm()
        {
                global $lng;
                
                include_once("Services/Form/classes/class.ilPropertyFormGUI.php");
                $single_form_gui = new ilPropertyFormGUI();
                $single_form_gui->setMultipart(true);
                
                // File Title
                $in_title = new ilTextInputGUI($lng->txt("title"), "title");
                $in_title->setInfo($this->lng->txt("if_no_title_then_filename"));
                $in_title->setSize(min(40, ilObject::TITLE_LENGTH));
                $in_title->setMaxLength(ilObject::TITLE_LENGTH);
                $single_form_gui->addItem($in_title);
                
                // File Description
                $in_descr = new ilTextAreaInputGUI($lng->txt("description"), "description");
                $single_form_gui->addItem($in_descr);
                
                // File
                $in_file = new ilFileInputGUI($lng->txt("file"), "upload_file");
                $in_file->setRequired(true);
                $single_form_gui->addItem($in_file);
                
                $single_form_gui->addCommandButton("save", $this->lng->txt($this->type."_add"));
                $single_form_gui->addCommandButton("saveAndMeta", $this->lng->txt("file_add_and_metadata"));
                $single_form_gui->addCommandButton("cancel", $lng->txt("cancel"));
                
                $single_form_gui->setTableWidth("600px");
                $single_form_gui->setTarget($this->getTargetFrame("save"));
                $single_form_gui->setTitle($this->lng->txt($this->type."_new"));
                $single_form_gui->setTitleIcon(ilUtil::getImagePath('icon_file.svg'), $this->lng->txt('obj_file'));
                
                $this->ctrl->setParameter($this, "new_type", "file");
        
                $single_form_gui->setFormAction($this->ctrl->getFormAction($this, "save"));

                return $single_form_gui;
        }

        function save()
        {
                global $objDefinition, $ilUser;

                if (!$this->checkPermissionBool("create", "", "file"))
                {
                        $this->ilErr->raiseError($this->lng->txt("permission_denied"),$this->ilErr->MESSAGE);
                }

                $single_form_gui = $this->initSingleUploadForm();

                if ($single_form_gui->checkInput())
                {
                        $title = $single_form_gui->getInput("title");
                        $description = $single_form_gui->getInput("description");
                        $upload_file = $single_form_gui->getInput("upload_file");

                        if (trim($title) == "")
                        {
                                $title = $upload_file["name"];
                        }
                        else
                        {
                                // BEGIN WebDAV: Ensure that object title ends with the filename extension
                                $fileExtension = ilObjFileAccess::_getFileExtension($upload_file["name"]);
                                $titleExtension = ilObjFileAccess::_getFileExtension($title);
                                if ($titleExtension != $fileExtension && strlen($fileExtension) > 0)
                                {
                                        $title .= '.'.$fileExtension;
                                }
                                // END WebDAV: Ensure that object title ends with the filename extension
                        }

                        // create and insert file in grp_tree
                        include_once("./Modules/File/classes/class.ilObjFile.php");
                        $fileObj = new ilObjFile();
                        $fileObj->setTitle($title);
                        $fileObj->setDescription($description);
                        $fileObj->setFileName($upload_file["name"]);
                        //$fileObj->setFileType($upload_file["type"]);
                        include_once("./Services/Utilities/classes/class.ilMimeTypeUtil.php");
                        $fileObj->setFileType(ilMimeTypeUtil::getMimeType(
                                "", $upload_file["name"], $upload_file["type"]));
                        $fileObj->setFileSize($upload_file["size"]);
                        $this->object_id = $fileObj->create();

                        $this->putObjectInTree($fileObj, $this->parent_id);

                        // upload file to filesystem
                        $fileObj->createDirectory();
                        $fileObj->getUploadFile($upload_file["tmp_name"],
                                $upload_file["name"]);
                        
                        $this->handleAutoRating($fileObj);

                        // BEGIN ChangeEvent: Record write event.
                        require_once('Services/Tracking/classes/class.ilChangeEvent.php');
                        ilChangeEvent::_recordWriteEvent($fileObj->getId(), $ilUser->getId(), 'create');
                        // END ChangeEvent: Record write event.
                        
                        ilUtil::sendSuccess($this->lng->txt("file_added"),true);

                        if ($this->ctrl->getCmd() == "saveAndMeta")
                        {
                                $this->ctrl->setParameter($this, "new_type", "");
                                $target = $this->ctrl->getLinkTargetByClass(array("ilobjectmetadatagui", "ilmdeditorgui"), "listSection", "", false, false);
                                ilUtil::redirect($target);
                        }
                        else
                        {
                                $this->ctrl->returnToParent($this);
                        }
                }
                else
                {
                        $single_form_gui->setValuesByPost();
                        $this->tpl->setContent($single_form_gui->getHTML());
                }
        }

        function saveAndMeta()
        {
                $this->save();
        }

        public function initZipUploadForm($a_mode = "create")
        {
                global $lng;
                
                include_once("Services/Form/classes/class.ilPropertyFormGUI.php");
                $zip_form_gui = new ilPropertyFormGUI();
                $zip_form_gui->setMultipart(true);
                                
                // File
                $in_file = new ilFileInputGUI($lng->txt("file"), "zip_file");
                $in_file->setRequired(true);
                $in_file->setSuffixes(array("zip"));
                $zip_form_gui->addItem($in_file);

                // Take over structure
                $in_str = new ilCheckboxInputGUI($this->lng->txt("take_over_structure"), "adopt_structure");
                $in_str->setInfo($this->lng->txt("take_over_structure_info"));
                $zip_form_gui->addItem($in_str);
                
                $zip_form_gui->addCommandButton("saveUnzip", $this->lng->txt($this->type."_add"));
                $zip_form_gui->addCommandButton("cancel", $lng->txt("cancel"));
                
                $zip_form_gui->setTableWidth("600px");
                $zip_form_gui->setTarget($this->getTargetFrame("save"));
                $zip_form_gui->setTitle($this->lng->txt("header_zip"));
                $zip_form_gui->setTitleIcon(ilUtil::getImagePath('icon_file.svg'), $this->lng->txt('obj_file'));
                
                $this->ctrl->setParameter($this, "new_type", "file");
                
                $zip_form_gui->setFormAction($this->ctrl->getFormAction($this, "saveUnzip"));

                return $zip_form_gui;
        }

        function saveUnzip()
        {
                $zip_form_gui = $this->initZipUploadForm();

                if ($this->checkPermissionBool("create", "", "file"))
                {
                        if ($zip_form_gui->checkInput())
                        {
                                $zip_file = $zip_form_gui->getInput("zip_file");
                                $adopt_structure = $zip_form_gui->getInput("adopt_structure");

                                include_once ("Services/Utilities/classes/class.ilFileUtils.php");

                                // Create unzip-directory
                                $newDir = ilUtil::ilTempnam();
                                ilUtil::makeDir($newDir);
                                
                                // Check if permission is granted for creation of object, if necessary
                                if($this->id_type != self::WORKSPACE_NODE_ID)
                                {
                                        
                                        $type = ilObject::_lookupType((int)$this->parent_id, true);
                                }
                                else
                                {
                                        $type = ilObject::_lookupType($this->tree->lookupObjectId($this->parent_id), false);
                                }                       
                                
                                $tree = $access_handler = null;
                                switch($type)
                                {
                                        // workspace structure
                                        case 'wfld':
                                        case 'wsrt':
                                                $permission = $this->checkPermissionBool("create", "", "wfld");
                                                $containerType = "WorkspaceFolder";     
                                                $tree = $this->tree;
                                                $access_handler = $this->getAccessHandler();                                            
                                                break;
                                        
                                        // use categories as structure
                                        case 'cat':
                                        case 'root':
                                                $permission = $this->checkPermissionBool("create", "", "cat");
                                                $containerType = "Category";
                                                break;
                                        
                                        // use folders as structure (in courses)
                                        default:
                                                $permission = $this->checkPermissionBool("create", "", "fold");
                                                $containerType = "Folder";      
                                                break;                                  
                                }                                                                                               
                                //      processZipFile ( 
                                //              Dir to unzip, 
                                //              Path to uploaded file, 
                                //              should a structure be created (+ permission check)?
                                //              ref_id of parent
                                //              object that contains files (folder or category)  
                                //              should sendInfo be persistent?)
                                try 
                                {
                                        $processDone = ilFileUtils::processZipFile( $newDir, 
                                                $zip_file["tmp_name"],
                                                ($adopt_structure && $permission),
                                                $this->parent_id,
                                                $containerType,
                                                $tree,
                                                $access_handler);
                                        ilUtil::sendSuccess($this->lng->txt("file_added"),true);
                                }
                                catch (ilFileUtilsException $e) 
                                {
                                        ilUtil::sendFailure($e->getMessage(), true);
                                }

                                ilUtil::delDir($newDir);
                                $this->ctrl->returnToParent($this);
                        }
                        else
                        {
                                $zip_form_gui->setValuesByPost();
                                $this->tpl->setContent($zip_form_gui->getHTML());
                        }
                }
                else
                {
                        $this->ilErr->raiseError($this->lng->txt("permission_denied"),$this->ilErr->MESSAGE);
                }
        }

        function update()
        {
                global $ilTabs;
                
                $form = $this->initPropertiesForm();
                if(!$form->checkInput())
                {
                        $ilTabs->activateTab("settings");
                        $form->setValuesByPost();
                        $this->tpl->setContent($form->getHTML());
                        return false;   
                }

                $data = $form->getInput('file');                

                // delete trailing '/' in filename
                while (substr($data["name"],-1) == '/')
                {
                        $data["name"] = substr($data["name"],0,-1);
                }
                
                $filename = empty($data["name"]) ? $this->object->getFileName() : $data["name"];
                $title = $form->getInput('title');
                if(strlen(trim($title)) == 0)
                {
                        $title = $filename;
                }
                else
                {
                        $title = $this->object->checkFileExtension($filename,$title);
                }
                $this->object->setTitle($title);
                
                if (!empty($data["name"]))
                {
                        switch($form->getInput('replace'))
                        {
                                case 1:
                                        $this->object->deleteVersions();
                                        $this->object->clearDataDirectory();
                                        $this->object->replaceFile($data['tmp_name'],$data['name']);
                                        break;
                                case 0:
                                        $this->object->addFileVersion($data['tmp_name'],$data['name']);
                                        break;
                        }
                        $this->object->setFileName($data['name']);
                        include_once("./Services/Utilities/classes/class.ilMimeTypeUtil.php");
                        $this->object->setFileType(ilMimeTypeUtil::getMimeType(
                                "", $data["name"], $data["type"]));
                        $this->object->setFileSize($data['size']);
                }
                
                $this->object->setDescription($form->getInput('description'));
                $this->object->setRating($form->getInput('rating'));
                
                $this->update = $this->object->update();

                // BEGIN ChangeEvent: Record update event.
                if (!empty($data["name"]))
                {
                        require_once('Services/Tracking/classes/class.ilChangeEvent.php');
                        global $ilUser;
                        ilChangeEvent::_recordWriteEvent($this->object->getId(), $ilUser->getId(), 'update');
                        ilChangeEvent::_catchupWriteEvents($this->object->getId(), $ilUser->getId());                   
                }
                // END ChangeEvent: Record update event.
                
                // Update ecs export settings
                include_once 'Modules/File/classes/class.ilECSFileSettings.php';        
                $ecs = new ilECSFileSettings($this->object);                    
                $ecs->handleSettingsUpdate();
                
                ilUtil::sendSuccess($this->lng->txt("msg_obj_modified"),true);
                ilUtil::redirect($this->ctrl->getLinkTarget($this,'edit','',false,false));
        }
        
        function edit()
        {
                global $ilTabs, $ilErr;

                if (!$this->checkPermissionBool("write"))
                {
                        $ilErr->raiseError($this->lng->txt("msg_no_perm_write"));
                }

                $ilTabs->activateTab("settings");

                $form = $this->initPropertiesForm();

                $val = array();
                $val['title'] = $this->object->getTitle();
                $val['description'] = $this->object->getLongDescription();
                $val['rating'] = $this->object->hasRating();
                $form->setValuesByArray($val);
                
                // Edit ecs export settings
                include_once 'Modules/File/classes/class.ilECSFileSettings.php';
                $ecs = new ilECSFileSettings($this->object);            
                $ecs->addSettingsToForm($form, 'file');
                
                $this->tpl->setContent($form->getHTML());
                return true;
        }
        
        protected function initPropertiesForm()
        {
                include_once('./Services/Form/classes/class.ilPropertyFormGUI.php');
                
                $this->lng->loadLanguageModule('file');

                $form = new ilPropertyFormGUI();
                $form->setFormAction($this->ctrl->getFormAction($this),'update');
                $form->setTitle($this->lng->txt('file_edit'));
                $form->addCommandButton('update',$this->lng->txt('save'));
                $form->addCommandButton('cancel',$this->lng->txt('cancel'));
                        
                $title = new ilTextInputGUI($this->lng->txt('title'),'title');
                $title->setValue($this->object->getTitle());
                $title->setInfo($this->lng->txt("if_no_title_then_filename"));
                $form->addItem($title);
                
                $upload_possible = true;
                if($this->id_type == self::WORKSPACE_NODE_ID)
                {
                        include_once "Services/DiskQuota/classes/class.ilDiskQuotaHandler.php";
                        $upload_possible = ilDiskQuotaHandler::isUploadPossible();                      
                }
                
                if($upload_possible)
                {
                        $file = new ilFileInputGUI($this->lng->txt('obj_file'),'file');
                        $file->setRequired(false);
        //              $file->enableFileNameSelection('title');
                        $form->addItem($file);

                        $group = new ilRadioGroupInputGUI('','replace');
                        $group->setValue(0);

                        $replace = new ilRadioOption($this->lng->txt('replace_file'),1);
                        $replace->setInfo($this->lng->txt('replace_file_info'));
                        $group->addOption($replace);


                        $keep = new ilRadioOption($this->lng->txt('file_new_version'),0);
                        $keep->setInfo($this->lng->txt('file_new_version_info'));
                        $group->addOption($keep);

                        $file->addSubItem($group);
                }
                else
                {                       
                        $file = new ilNonEditableValueGUI($this->lng->txt('obj_file'));
                        $file->setValue($this->lng->txt("personal_workspace_quota_exceeded_warning"));
                        $form->addItem($file);
                }
                        
                $desc = new ilTextAreaInputGUI($this->lng->txt('description'),'description');
                $desc->setRows(3);
                #$desc->setCols(40);
                $form->addItem($desc);
                
                if($this->id_type == self::REPOSITORY_NODE_ID)
                {                       
                        $this->lng->loadLanguageModule('rating');
                        $rate = new ilCheckboxInputGUI($this->lng->txt('rating_activate_rating'), 'rating');
                        $rate->setInfo($this->lng->txt('rating_activate_rating_info'));
                        $form->addItem($rate);
                }

                return $form;
        }
        
        function sendFile()
        {
                global $ilUser, $ilCtrl;
                
                if(ANONYMOUS_USER_ID == $ilUser->getId() && isset($_GET['transaction']) )
                {
                        $this->object->sendFile($_GET["hist_id"]);
                }

                if ($this->checkPermissionBool("read"))
                {
                        // BEGIN ChangeEvent: Record read event.
                        require_once('Services/Tracking/classes/class.ilChangeEvent.php');
                        global $ilUser;
                        // Record read event and catchup with write events
                        ilChangeEvent::_recordReadEvent($this->object->getType(), $this->object->getRefId(),
                                $this->object->getId(), $ilUser->getId());                      
                        // END ChangeEvent: Record read event.
                        
                        require_once 'Services/Tracking/classes/class.ilLPStatusWrapper.php';
                        ilLPStatusWrapper::_updateStatus($this->object->getId(), $ilUser->getId());

                        $this->object->sendFile($_GET["hist_id"]);
                }
                else
                {
                        $this->ilErr->raiseError($this->lng->txt("permission_denied"),$this->ilErr->MESSAGE);
                }
                return true;
        }


        function versions()
        {
                global $ilTabs;
                
                $ilTabs->activateTab("id_versions");

                if (!$this->checkPermissionBool("write"))
                {
                        $this->ilErr->raiseError($this->lng->txt("permission_denied"),$this->ilErr->MESSAGE);
                }
                
                // get versions
                $versions = $this->object->getVersions();
                
                // build versions table
                require_once("Modules/File/classes/class.ilFileVersionTableGUI.php");
                $table = new ilFileVersionTableGUI($this, "versions");
                $table->setMaxCount(sizeof($versions));
                $table->setData($versions);             
                
                $this->tpl->setVariable("ADM_CONTENT", $table->getHTML());
        }
        
        function infoScreen()
        {
                $this->ctrl->setCmd("showSummary");
                $this->ctrl->setCmdClass("ilinfoscreengui");
                $this->infoScreenForward();
        }
        
        function infoScreenForward()
        {
                global $ilTabs, $ilErr, $ilToolbar;
                
                $ilTabs->activateTab("id_info");

                if (!$this->checkPermissionBool("visible"))
                {
                        $ilErr->raiseError($this->lng->txt("msg_no_perm_read"));
                }

                include_once("./Services/InfoScreen/classes/class.ilInfoScreenGUI.php");
                $info = new ilInfoScreenGUI($this);

                if ($this->checkPermissionBool("read", "sendfile"))
                {
                        // #9876
                        $this->lng->loadLanguageModule("file");
                        
                        // #14378
                        include_once "Services/UIComponent/Button/classes/class.ilLinkButton.php";
                        $button = ilLinkButton::getInstance();
                        $button->setCaption("file_download");
                        $button->setPrimary(true);
                        
                        // get permanent download link for repository
                        if ($this->id_type == self::REPOSITORY_NODE_ID)
                        {
                                $button->setUrl(ilObjFileAccess::_getPermanentDownloadLink($this->node_id));                            
                        }
                        else
                        {
                                $button->setUrl($this->ctrl->getLinkTarget($this, "sendfile"));         
                        }
                        
                        $ilToolbar->addButtonInstance($button);
                }
                
                $info->enablePrivateNotes();
                
                if ($this->checkPermissionBool("read"))
                {
                        $info->enableNews();
                }

                // no news editing for files, just notifications
                $info->enableNewsEditing(false);
                if ($this->checkPermissionBool("write"))
                {
                        $news_set = new ilSetting("news");
                        $enable_internal_rss = $news_set->get("enable_rss_for_internal");
                        
                        if ($enable_internal_rss)
                        {
                                $info->setBlockProperty("news", "settings", true);
                                $info->setBlockProperty("news", "public_notifications_option", true);
                        }
                }

                
                // standard meta data
                $info->addMetaDataSections($this->object->getId(),0, $this->object->getType());
                
                $info->addSection($this->lng->txt("file_info"));
                $info->addProperty($this->lng->txt("filename"),
                        $this->object->getFileName());
                // BEGIN WebDAV Guess file type.
                $info->addProperty($this->lng->txt("type"),
                                $this->object->guessFileType());
                // END WebDAV Guess file type.
                $info->addProperty($this->lng->txt("size"),
                        ilFormat::formatSize(ilObjFile::_lookupFileSize($this->object->getId()),'long'));
                $info->addProperty($this->lng->txt("version"),
                        $this->object->getVersion());
                
                // using getVersions function instead of ilHistory direct
                $uploader = $this->object->getVersions();
                $uploader = array_shift($uploader);
                $uploader = $uploader["user_id"];               
                
                $this->lng->loadLanguageModule("file");
                include_once "Services/User/classes/class.ilUserUtil.php";
                $info->addProperty($this->lng->txt("file_uploaded_by"), ilUserUtil::getNamePresentation($uploader));
                
                // download link added in repository
                if ($this->id_type == self::REPOSITORY_NODE_ID && $this->checkPermissionBool("read", "sendfile"))
                {
                        $tpl = new ilTemplate("tpl.download_link.html", true, true, "Modules/File");
                        $tpl->setVariable("LINK", ilObjFileAccess::_getPermanentDownloadLink($this->node_id));
                        $info->addProperty($this->lng->txt("download_link"), $tpl->get());
                }
                
                if($this->id_type == self::WORKSPACE_NODE_ID)
                {                       
                        $info->addProperty($this->lng->txt("perma_link"), $this->getPermanentLinkWidget());
                }
                
                // display previews
                include_once("./Services/Preview/classes/class.ilPreview.php");
                if (!$this->ctrl->isAsynch() && 
                        ilPreview::hasPreview($this->object->getId(), $this->object->getType()) && 
                        $this->checkPermissionBool("read"))
                {
                        include_once("./Services/Preview/classes/class.ilPreviewGUI.php");
                        
                        // get context for access checks later on
            $context;
                        switch ($this->id_type)
                        {
                                case self::WORKSPACE_NODE_ID:
                                case self::WORKSPACE_OBJECT_ID:
                                        $context = ilPreviewGUI::CONTEXT_WORKSPACE;
                                        break;  
                                
                                default:
                                        $context = ilPreviewGUI::CONTEXT_REPOSITORY;
                                        break;  
                        }
                        
            $preview = new ilPreviewGUI($this->node_id, $context, $this->object->getId(), $this->access_handler);
                        $info->addProperty($this->lng->txt("preview"), $preview->getInlineHTML());
                }

                // forward the command
            // $this->ctrl->setCmd("showSummary");
                // $this->ctrl->setCmdClass("ilinfoscreengui");
            $this->ctrl->forwardCommand($info);
        }


        // get tabs
        function setTabs()
        {
                global $ilTabs, $lng, $ilHelp;
                
                $ilHelp->setScreenIdComponent("file");

                $this->ctrl->setParameter($this,"ref_id",$this->node_id);

                if ($this->checkPermissionBool("visible"))
                {
                        $ilTabs->addTab("id_info",
                                $lng->txt("info_short"),
                                $this->ctrl->getLinkTargetByClass(array("ilobjfilegui", "ilinfoscreengui"), "showSummary"));
                }

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

                if ($this->checkPermissionBool("write"))
                {
                        $ilTabs->addTab("id_versions",
                                $lng->txt("versions"),
                                $this->ctrl->getLinkTarget($this, "versions"));
                }
                
                require_once 'Services/Tracking/classes/class.ilLearningProgressAccess.php';
                if(ilLearningProgressAccess::checkAccess($this->object->getRefId()))
                {
                        $ilTabs->addTab(
                                'learning_progress',
                                $lng->txt('learning_progress'),
                                $this->ctrl->getLinkTargetByClass(array(__CLASS__, 'illearningprogressgui'),'')
                        );
                }

                // meta data
                if ($this->checkPermissionBool("write"))
                {
                        include_once "Services/Object/classes/class.ilObjectMetaDataGUI.php";
                        $mdgui = new ilObjectMetaDataGUI($this->object);                                        
                        $mdtab = $mdgui->getTab();
                        if($mdtab)
                        {
                                $ilTabs->addTab("id_meta",
                                        $lng->txt("meta_data"),
                                        $mdtab);
                        }                       
                }

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

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

        public static function _goto($a_target, $a_additional = null)
        {
                global $ilErr, $lng, $ilAccess;
                
                if($a_additional && substr($a_additional, -3) == "wsp")
                {
                        $_GET["baseClass"] = "ilsharedresourceGUI";     
                        $_GET["wsp_id"] = $a_target;            
                        include("ilias.php");
                        exit;
                }
                
                // added support for direct download goto links
                if($a_additional && substr($a_additional, -8) == "download")
                {
                        ilObjectGUI::_gotoRepositoryNode($a_target, "sendfile");
                }

                // static method, no workspace support yet

                if ($ilAccess->checkAccess("visible", "", $a_target) ||
                        $ilAccess->checkAccess("read", "", $a_target))
                {
                        ilObjectGUI::_gotoRepositoryNode($a_target, "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);
        }

        function addLocatorItems()
        {
                global $ilLocator;
                
                if (is_object($this->object))
                {
                        $ilLocator->addItem($this->object->getTitle(), $this->ctrl->getLinkTarget($this, ""), "", $this->node_id);
                }
        }
        
        public function initMultiUploadForm()
        {
                include_once("Services/Form/classes/class.ilPropertyFormGUI.php");
                $dnd_form_gui = new ilPropertyFormGUI();
                $dnd_form_gui->setMultipart(true);
                $dnd_form_gui->setHideLabels();
                
                // file input
                include_once("Services/Form/classes/class.ilDragDropFileInputGUI.php");
                $dnd_input = new ilDragDropFileInputGUI($this->lng->txt("files"), "upload_files");
                $dnd_input->setArchiveSuffixes(array("zip"));
                $dnd_input->setCommandButtonNames("uploadFiles", "cancel");
                $dnd_form_gui->addItem($dnd_input);
                
                // add commands
                $dnd_form_gui->addCommandButton("uploadFiles", $this->lng->txt("upload_files"));
                $dnd_form_gui->addCommandButton("cancel", $this->lng->txt("cancel"));
                
                $dnd_form_gui->setTableWidth("100%");
                $dnd_form_gui->setTarget($this->getTargetFrame("save"));
                $dnd_form_gui->setTitle($this->lng->txt("upload_files_title"));
                $dnd_form_gui->setTitleIcon(ilUtil::getImagePath('icon_file.gif'), $this->lng->txt('obj_file'));
                
                $this->ctrl->setParameter($this, "new_type", "file");
                $dnd_form_gui->setFormAction($this->ctrl->getFormAction($this, "uploadFiles"));
                
                return $dnd_form_gui;
        }
        
        public function uploadFiles()
        {
                include_once("./Services/JSON/classes/class.ilJsonUtil.php");
                
                $response = new stdClass();     
                $response->error = null;
                $response->debug = null;        
                
                $files = $_FILES;
                
                // #14249 - race conditions because of concurrent uploads
                $after_creation_callback = (int)$_REQUEST["crtcb"];
                if($after_creation_callback)
                {
                        $this->after_creation_callback_objects = array();
                        unset($_REQUEST["crtcb"]);
                }
                
                // load form
                $dnd_form_gui = $this->initMultiUploadForm();
                if ($dnd_form_gui->checkInput())
                {
                        try
                        {
                                if (!$this->checkPermissionBool("create", "", "file"))
                                {
                                        $response->error = $this->lng->txt("permission_denied");
                                }
                                else
                                {
                                        // handle the file
                                        $inp = $dnd_form_gui->getInput("upload_files");
                                        $this->log->debug("ilObjFileGUI::uploadFiles ".print_r($_POST, true));
                                        $this->log->debug("ilObjFileGUI::uploadFiles ".print_r($_FILES, true));
                                        $fileresult = $this->handleFileUpload($inp);
                                        if ($fileresult)
                                                $response = (object)array_merge((array)$response, (array)$fileresult);
                                }
                        }
                        catch (Exception $ex)
                        {
                                $response->error = $ex->getMessage() . " ## " . $ex->getTraceAsString();
                        }
                }
                else
                {
                        $dnd_input = $dnd_form_gui->getItemByPostVar("upload_files");
                        $response->error = $dnd_input->getAlert();
                }
                
                if($after_creation_callback &&
                        sizeof($this->after_creation_callback_objects))
                {                       
                        foreach($this->after_creation_callback_objects as $new_file_obj)
                        {                               
                                ilObject2GUI::handleAfterSaveCallback($new_file_obj, $after_creation_callback);
                        }
                        unset($this->after_creation_callback_objects);
                }

                // send response object (don't use 'application/json' as IE wants to download it!)
                header('Vary: Accept');
                header('Content-type: text/plain');
                echo ilJsonUtil::encode($response);
                
                // no further processing!
                exit;
        }       
        
        protected function handleFileUpload($file_upload) 
        {
                global $ilUser;
                require_once('./Services/Utilities/classes/class.ilFileUtils.php');
                // file upload params
                $filename = ilFileUtils::getValidFilename(ilUtil::stripSlashes($file_upload["name"]));
                $type = ilUtil::stripSlashes($file_upload["type"]);
                $size = ilFileUtils::getValidFilename(ilUtil::stripSlashes($file_upload["size"]));
                $temp_name = $file_upload["tmp_name"];
                
                // additional params
                $title = ilUtil::stripSlashes($file_upload["title"]);
                $description = ilUtil::stripSlashes($file_upload["description"]);
                $extract = ilUtil::stripSlashes($file_upload["extract"]);
                $keep_structure = ilUtil::stripSlashes($file_upload["keep_structure"]);
                
                // create answer object         
                $response = new stdClass();
                $response->fileName = $filename;
                $response->fileSize = intval($size);
                $response->fileType = $type;
                $response->fileUnzipped = $extract;
                $response->error = null;

                // extract archive?
                if ($extract)
                {
                        $zip_file = $filename;
                        $adopt_structure = $keep_structure;

                        include_once ("Services/Utilities/classes/class.ilFileUtils.php");

                        // Create unzip-directory
                        $newDir = ilUtil::ilTempnam();
                        ilUtil::makeDir($newDir);
                        
                        // Check if permission is granted for creation of object, if necessary
                        if($this->id_type != self::WORKSPACE_NODE_ID)
                        {                                       
                                $type = ilObject::_lookupType((int)$this->parent_id, true);
                        }
                        else
                        {
                                $type = ilObject::_lookupType($this->tree->lookupObjectId($this->parent_id), false);
                        }                       
                        
                        $tree = $access_handler = null;
                        switch($type)
                        {
                                // workspace structure
                                case 'wfld':
                                case 'wsrt':
                                        $permission = $this->checkPermissionBool("create", "", "wfld");
                                        $containerType = "WorkspaceFolder";     
                                        $tree = $this->tree;
                                        $access_handler = $this->getAccessHandler();                                            
                                        break;
                                
                                // use categories as structure
                                case 'cat':
                                case 'root':
                                        $permission = $this->checkPermissionBool("create", "", "cat");
                                        $containerType = "Category";
                                        break;
                                
                                // use folders as structure (in courses)
                                default:
                                        $permission = $this->checkPermissionBool("create", "", "fold");
                                        $containerType = "Folder";      
                                        break;                                  
                        }                                                                                               
                        
                        try 
                        {
                                //      processZipFile ( 
                                //              Dir to unzip, 
                                //              Path to uploaded file, 
                                //              should a structure be created (+ permission check)?
                                //              ref_id of parent
                                //              object that contains files (folder or category)  
                                //              should sendInfo be persistent?)
                                ilFileUtils::processZipFile( 
                                        $newDir, 
                                        $temp_name,
                                        ($adopt_structure && $permission),
                                        $this->parent_id,
                                        $containerType,
                                        $tree,
                                        $access_handler);
                        }
                        catch (ilFileUtilsException $e) 
                        {
                                $response->error = $e->getMessage();
                        }
                        catch (Exception $ex)
                        {
                                $response->error = $ex->getMessage();      
                        }

                        ilUtil::delDir($newDir);
                        
                        // #15404
                        if($this->id_type != self::WORKSPACE_NODE_ID)
                        {
                                foreach(ilFileUtils::getNewObjects() as $parent_ref_id => $objects)
                                {
                                        if($parent_ref_id != $this->parent_id)
                                        {
                                                continue;
                                        }

                                        foreach($objects as $object)
                                        {
                                                $this->after_creation_callback_objects[] = $object;
                                        }
                                }       
                        }
                }
                else
                {
                        if (trim($title) == "")
                        {
                                $title = $filename;
                        }
                        else
                        {
                                // BEGIN WebDAV: Ensure that object title ends with the filename extension
                                $fileExtension = ilObjFileAccess::_getFileExtension($filename);
                                $titleExtension = ilObjFileAccess::_getFileExtension($title);
                                if ($titleExtension != $fileExtension && strlen($fileExtension) > 0)
                                {
                                        $title .= '.'.$fileExtension;
                                }
                                // END WebDAV: Ensure that object title ends with the filename extension
                        }
                        
                        // create and insert file in grp_tree
                        include_once("./Modules/File/classes/class.ilObjFile.php");
                        $fileObj = new ilObjFile();
                        $fileObj->setTitle($title);
                        $fileObj->setDescription($description);
                        $fileObj->setFileName($filename);
                        
                        include_once("./Services/Utilities/classes/class.ilMimeTypeUtil.php");
                        $fileObj->setFileType(ilMimeTypeUtil::getMimeType("", $filename, $type));
                        $fileObj->setFileSize($size);
                        $this->object_id = $fileObj->create();
                        
                        $this->putObjectInTree($fileObj, $this->parent_id);
                        
                        // see uploadFiles()
                        if(is_array($this->after_creation_callback_objects))
                        {
                                $this->after_creation_callback_objects[] = $fileObj;
                        }
                        
                        // upload file to filesystem
                        $fileObj->createDirectory();
                        $fileObj->raiseUploadError(false);
                        $fileObj->getUploadFile($temp_name, $filename, false);
                        
                        $this->handleAutoRating($fileObj);
                        
                        // BEGIN ChangeEvent: Record write event.
                        require_once('./Services/Tracking/classes/class.ilChangeEvent.php');
                        ilChangeEvent::_recordWriteEvent($fileObj->getId(), $ilUser->getId(), 'create');
                        // END ChangeEvent: Record write event.    
                }
                
                return $response;
        }
        
        function deleteVersions()
        {
                global $ilTabs, $ilLocator;
                
                // get ids either from GET (if single item was clicked) or 
                // from POST (if multiple items were selected)
                $version_ids = isset($_GET["hist_id"]) ? array($_GET["hist_id"]) : $_POST["hist_id"];
                
                if (count($version_ids) < 1)
                {
                        ilUtil::sendFailure($this->lng->txt("no_checkbox"), true);
                        $this->ctrl->redirect($this, "versions");
                }
                else
                {
                        $ilTabs->activateTab("id_versions");

                        // check if all versions are selected
                        $versionsToKeep = array_udiff($this->object->getVersions(), $version_ids, array($this, "compareHistoryIds"));
                        if (count($versionsToKeep) < 1) 
                        {
                                // set our message
                                ilUtil::sendQuestion($this->lng->txt("file_confirm_delete_all_versions"));
                                
                                // show confirmation gui
                                include_once("./Services/Utilities/classes/class.ilConfirmationGUI.php");
                                $conf_gui = new ilConfirmationGUI();
                                $conf_gui->setFormAction($this->ctrl->getFormAction($this, "versions"));
                                $conf_gui->setCancel($this->lng->txt("cancel"), "cancelDeleteFile");
                                $conf_gui->setConfirm($this->lng->txt("confirm"), "confirmDeleteFile");
                                
                                $conf_gui->addItem("id[]", $this->ref_id, $this->object->getTitle(),
                                        ilObject::_getIcon($this->object->getId(), "small", $this->object->getType()),
                                        $this->lng->txt("icon")." ".$this->lng->txt("obj_".$this->object->getType()));
                        
                                $html = $conf_gui->getHTML();
                        }
                        else
                        {               
                                include_once("./Modules/File/classes/class.ilFileVersionTableGUI.php");
                        
                                ilUtil::sendQuestion($this->lng->txt("file_confirm_delete_versions"));
                                $versions = $this->object->getVersions($version_ids);
                        
                                $table = new ilFileVersionTableGUI($this, 'versions', true);
                                $table->setMaxCount(sizeof($versions));
                                $table->setData($versions);
                        
                                $html = $table->getHTML();
                        }

                        $this->tpl->setVariable('ADM_CONTENT', $html);
                }
        }

        function confirmDeleteVersions()
        {
                global $ilTabs;
                
                // has the user the rights to delete versions?
                if (!$this->checkPermissionBool("write"))
                {
                        $this->ilErr->raiseError($this->lng->txt("permission_denied"), $this->ilErr->MESSAGE);
                }
                
                // delete versions after confirmation
                if (count($_POST["hist_id"]) > 0)
                {
                        $this->object->deleteVersions($_POST["hist_id"]);
                        ilUtil::sendSuccess($this->lng->txt("file_versions_deleted"), true);
                }

                $this->ctrl->setParameter($this, "hist_id", "");                
                $this->ctrl->redirect($this, "versions");
        }
        
        function cancelDeleteVersions()
        {
                $this->ctrl->redirect($this, "versions");
        }
        
        function confirmDeleteFile()
        {
                // has the user the rights to delete the file?
                if (!$this->checkPermissionBool("write"))
                {
                        $this->ilErr->raiseError($this->lng->txt("permission_denied"), $this->ilErr->MESSAGE);
                }
                
                // delete this file object
                include_once("./Services/Repository/classes/class.ilRepUtilGUI.php");
                $ru = new ilRepUtilGUI($this);
                $ru->deleteObjects($this->parent_id, array($this->ref_id));
                
                // redirect to parent object
                $this->ctrl->setParameterByClass("ilrepositorygui", "ref_id", $this->parent_id);
                $this->ctrl->redirectByClass("ilrepositorygui");
        }
        
        function cancelDeleteFile()
        {
                $this->ctrl->redirect($this, "versions");
        }
        
        function compareHistoryIds($v1, $v2)
        {
                if (is_array($v1))
                        $v1 = (int)$v1["hist_entry_id"];
                else if (!is_int($v1))
                        $v1 = (int)$v1;
                        
                if (is_array($v2))
                        $v2 = (int)$v2["hist_entry_id"];
                else if (!is_int($v2))
                        $v2 = (int)$v2;
                
                return $v1 - $v2;
        }

        function rollbackVersion()
        {
                global $ilTabs;
                
                // has the user the rights to delete the file?
                if (!$this->checkPermissionBool("write"))
                {
                        $this->ilErr->raiseError($this->lng->txt("permission_denied"), $this->ilErr->MESSAGE);
                }
                
                // get ids either from GET (if single item was clicked) or 
                // from POST (if multiple items were selected)
                $version_ids = isset($_GET["hist_id"]) ? array($_GET["hist_id"]) : $_POST["hist_id"];
                
                // more than one entry selected?
                if (count($version_ids) != 1)
                {
                        ilUtil::sendInfo($this->lng->txt("file_rollback_select_exact_one"), true);
                        $this->ctrl->redirect($this, "versions");
                }

                // rollback the version
                $new_version = $this->object->rollback($version_ids[0]);

                ilUtil::sendSuccess(sprintf($this->lng->txt("file_rollback_done"), $new_version["rollback_version"]), true);
                $this->ctrl->redirect($this, "versions");
        }
        
        protected function initHeaderAction($a_sub_type = null, $a_sub_id = null)
        {
                $lg = parent::initHeaderAction($a_sub_type, $a_sub_id); 
                if(is_object($lg))
                {                       
                        if($this->object->hasRating())
                        {
                                $lg->enableRating(true, null, false,
                                        array("ilcommonactiondispatchergui", "ilratinggui"));
                        }                                               
                }       
                return $lg;
        }

} // END class.ilObjFileGUI
?>