class.ilObjFileGUI.php

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

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

class ilObjFileGUI extends ilObjectGUI
{
        function ilObjFileGUI($a_data,$a_id,$a_call_by_reference = true, $a_prepare_output = true)
        {
                $this->type = "file";
                $this->ilObjectGUI($a_data,$a_id,$a_call_by_reference, false);
                $this->lng->loadLanguageModule('file');
        }
        
        function _forwards()
        {
                return array();
        }
        
        function executeCommand()
        {
                global $ilAccess, $ilNavigationHistory, $ilCtrl, $ilUser, $ilTabs;
                
                // add entry to navigation history
                if (!$this->getCreationMode() &&
                        $ilAccess->checkAccess("read", "", $_GET["ref_id"]))
                {
                        $ilNavigationHistory->addItem($_GET["ref_id"],
                                "repository.php?cmd=infoScreen&ref_id=".$_GET["ref_id"], "file");
                }               
                
                $next_class = $this->ctrl->getNextClass($this);
                $cmd = $this->ctrl->getCmd();
        
                if(!$this->getCreationMode())
                {
                        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::_isBuyable($this->object->getRefId() ) &&
                                   !ilPaymentObject::_hasAccess($this->object->getRefId(), $transaction) &&
                                   !$valid_transaction)
                                {
                                        $this->setLocator();
                                        $this->tpl->getStandardTemplate();

                                        include_once 'Services/Payment/classes/class.ilShopPurchaseGUI.php';
                                        $pp = new ilShopPurchaseGUI((int)$_GET['ref_id']);
                                        $ret = $this->ctrl->forwardCommand($pp);
                                        return true;
                                }
                        }
                }
                
                $this->prepareOutput();

                switch ($next_class)
                {
                        case "ilinfoscreengui":
                                $this->infoScreen();    // forwards command
                                break;

                        case 'ilmdeditorgui':
                                $ilTabs->activateTab("id_meta");

                                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');
                                
                                // todo: make this work
                                $md_gui->addObserver($this->object,'MDUpdateListener','Technical');
                                
                                $this->ctrl->forwardCommand($md_gui);
                                break;
                                
                        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":
                                $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;
                                
                        default:
                                if (empty($cmd))
                                {
                                        // does not seem to work
                                        //$this->ctrl->returnToParent($this);
                                        //$cmd = "view";
                                        $cmd = "infoScreen";
                                }

                                $cmd .= "Object";
                                $this->$cmd();
                                break;
                }               
        }

        function createObject($a_reload_form = "")
        {
                global $rbacsystem, $ilCtrl;

                $new_type = $_POST["new_type"] ? $_POST["new_type"] : $_GET["new_type"];

                if (!$rbacsystem->checkAccess("create", $_GET["ref_id"], $new_type))
                {
                        $this->ilErr->raiseError($this->lng->txt("permission_denied"),$this->ilErr->MESSAGE);
                }

                // fill in saved values in case of error
                $this->getTemplateFile("new",$this->type);

                if ($a_reload_form != "single_upload")
                {
                        $this->initSingleUploadForm("create");
                }
                $this->tpl->setVariable("SINGLE_UPLOAD_FORM", $this->single_form_gui->getHtml());

                if ($a_reload_form != "zip_upload")
                {
                        $this->initZipUploadForm("create");
                }

                $this->tpl->setVariable("ZIP_UPLOAD_FORM", $this->zip_form_gui->getHtml());

                $this->tpl->setVariable("TXT_REQUIRED_FLD", $this->lng->txt("required_field"));
                $this->tpl->setVariable("TXT_TAKE_OVER_STRUCTURE", $this->lng->txt("take_over_structure"));
                $this->tpl->setVariable("TXT_HEADER_ZIP", $this->lng->txt("header_zip"));
                
                $this->fillCloneTemplate('DUPLICATE','file');

                if (DEVMODE == 1)
                {
                        $this->initImportForm("file");
                        $this->tpl->setVariable("IMPORT", $this->form->getHTML());
                }
        }

        public function initImportForm($a_new_type = "")
        {
                global $lng, $ilCtrl;

                $lng->loadLanguageModule("file");

                include_once("Services/Form/classes/class.ilPropertyFormGUI.php");
                $this->form = new ilPropertyFormGUI();
                $this->form->setTarget("_top");

                // Import file
                include_once("./Services/Form/classes/class.ilFileInputGUI.php");
                $fi = new ilFileInputGUI($lng->txt("import_file"), "importfile");
                $fi->setSuffixes(array("zip"));
                $fi->setRequired(true);
                $this->form->addItem($fi);

                $this->form->addCommandButton("importFile", $lng->txt("import"));
                $this->form->addCommandButton("cancel", $lng->txt("cancel"));
                $this->form->setTitle($lng->txt($a_new_type."_import"));

                $this->form->setFormAction($ilCtrl->getFormAction($this));
        }

        function importFileObject()
        {
                global $rbacsystem, $objDefinition, $tpl, $lng;

                $new_type = $_POST["new_type"] ? $_POST["new_type"] : $_GET["new_type"];

                // create permission is already checked in createObject. This check here is done to prevent hacking attempts
                if (!$rbacsystem->checkAccess("create", $_GET["ref_id"], $new_type))
                {
                        $this->ilias->raiseError($this->lng->txt("no_create_permission"), $this->ilias->error_obj->MESSAGE);
                }
                $this->ctrl->setParameter($this, "new_type", $new_type);
                $this->initImportForm($new_type);
                if ($this->form->checkInput())
                {
                        // todo: make some check on manifest file
                        include_once("./Services/Export/classes/class.ilImport.php");
                        $imp = new ilImport((int) $_GET['ref_id']);
                        $new_id = $imp->importObject($newObj, $_FILES["importfile"]["tmp_name"],
                                $_FILES["importfile"]["name"], $new_type);
                        // put new object id into tree
                        if ($new_id > 0)
                        {
                                $newObj = ilObjectFactory::getInstanceByObjId($new_id);
                                $newObj->createReference();
                                $newObj->putInTree($_GET["ref_id"]);
                                $newObj->setPermissions($_GET["ref_id"]);
                                ilUtil::sendSuccess($lng->txt("msg_obj_modified"), true);
                                //$this->afterSave($newObj);
                                $this->ctrl->returnToParent($this);
                        }
                        return;
                }

                $this->form->setValuesByPost();
                $tpl->setContent($this->form->getHtml());
        }

        public function initSingleUploadForm($a_mode = "create")
        {
                global $lng;
                
                include_once("Services/Form/classes/class.ilPropertyFormGUI.php");
                $this->single_form_gui = new ilPropertyFormGUI();
                $this->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->setMaxLength(128);
                $in_title->setSize(40);
                $this->single_form_gui->addItem($in_title);
                
                // File Description
                $in_descr = new ilTextAreaInputGUI($lng->txt("description"), "description");
                $this->single_form_gui->addItem($in_descr);
                
                // File
                $in_file = new ilFileInputGUI($lng->txt("file"), "upload_file");
                $in_file->setRequired(true);
                $this->single_form_gui->addItem($in_file);
                
                // save and cancel commands
                if ($a_mode == "create")
                {
                        $this->single_form_gui->addCommandButton("save", $this->lng->txt($this->type."_add"));
                        $this->single_form_gui->addCommandButton("saveAndMeta", $this->lng->txt("file_add_and_metadata"));
                        $this->single_form_gui->addCommandButton("cancel", $lng->txt("cancel"));
                }
                else
                {
                        //$this->single_form_gui->addCommandButton("update", $lng->txt("save"));
                        //$this->single_form_gui->addCommandButton("cancelUpdate", $lng->txt("cancel"));
                }
                
                $this->single_form_gui->setTableWidth("600px");
                $this->single_form_gui->setTarget($this->getTargetFrame("save"));
                $this->single_form_gui->setTitle($this->lng->txt($this->type."_new"));
                $this->single_form_gui->setTitleIcon(ilUtil::getImagePath('icon_file.gif'), $this->lng->txt('obj_file'));
                
                if ($a_mode == "create")
                {
                        $this->ctrl->setParameter($this, "new_type", "file");
                }
                $this->single_form_gui->setFormAction($this->ctrl->getFormAction($this, "save"));
        }

        public function initZipUploadForm($a_mode = "create")
        {
                global $lng;
                
                include_once("Services/Form/classes/class.ilPropertyFormGUI.php");
                $this->zip_form_gui = new ilPropertyFormGUI();
                $this->zip_form_gui->setMultipart(true);
                                
                // File
                $in_file = new ilFileInputGUI($lng->txt("file"), "zip_file");
                $in_file->setRequired(true);
                $in_file->setSuffixes(array("zip"));
                $this->zip_form_gui->addItem($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"));
                $this->zip_form_gui->addItem($in_str);
                
                // save and cancel commands
                if ($a_mode == "create")
                {
                        $this->zip_form_gui->addCommandButton("saveUnzip", $this->lng->txt($this->type."_add"));
                        $this->zip_form_gui->addCommandButton("cancel", $lng->txt("cancel"));
                }
                else
                {
                        //$this->zip_form_gui->addCommandButton("update", $lng->txt("save"));
                        //$this->zip_form_gui->addCommandButton("cancelUpdate", $lng->txt("cancel"));
                }
                
                $this->zip_form_gui->setTableWidth("600px");
                $this->zip_form_gui->setTarget($this->getTargetFrame("save"));
                $this->zip_form_gui->setTitle($this->lng->txt("header_zip"));
                $this->zip_form_gui->setTitleIcon(ilUtil::getImagePath('icon_file.gif'), $this->lng->txt('obj_file'));
                
                if ($a_mode == "create")
                {
                        $this->ctrl->setParameter($this, "new_type", "file");
                }
                $this->zip_form_gui->setFormAction($this->ctrl->getFormAction($this, "saveUnzip"));
        }

        function saveUnzipObject()
        {
                global $rbacsystem;
                
                $this->initZipUploadForm("create");
                
                if ($rbacsystem->checkAccess("create", $_GET["ref_id"], "file")) {
                        if ($this->zip_form_gui->checkInput())
                        {
                                $zip_file = $this->zip_form_gui->getInput("zip_file");
                                $adopt_structure = $this->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
                                $type = ilObject::_lookupType((int) $_GET['ref_id'],true);
                                if($type == 'cat' or $type == 'root')
                                {
                                        $permission = $rbacsystem->checkAccess("create", $_GET["ref_id"], "cat");
                                        $containerType = "Category";
                                }
                                else {
                                        $permission = $rbacsystem->checkAccess("create", $_GET["ref_id"], "fold");
                                        $containerType = "Folder";                      
                                }

                                //      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),
                                                $_GET["ref_id"],
                                                $containerType,
                                                true);
                                        ilUtil::sendSuccess($this->lng->txt("file_added"),true);                                        
                                }
                                catch (ilFileUtilsException $e) 
                                {
                                        ilUtil::sendFailure($e->getMessage(), true);
                                }

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

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

                $this->initSingleUploadForm("create");
                
                if ($this->single_form_gui->checkInput())
                {
                        $title = $this->single_form_gui->getInput("title");
                        $description = $this->single_form_gui->getInput("description");
                        $upload_file = $this->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"]);
                        $fileObj->create();
                        $fileObj->createReference();
                        $fileObj->putInTree($_GET["ref_id"]);
                        $fileObj->setPermissions($_GET["ref_id"]);
                        // upload file to filesystem
                        $fileObj->createDirectory();
                        $fileObj->getUploadFile($upload_file["tmp_name"],
                                $upload_file["name"]);
        
                        // BEGIN ChangeEvent: Record write event.
                        require_once('Services/Tracking/classes/class.ilChangeEvent.php');
                        if (ilChangeEvent::_isActive())
                        {
                                ilChangeEvent::_recordWriteEvent($fileObj->getId(), $ilUser->getId(), 'create');
                        }
                        // END ChangeEvent: Record write event.
                        ilUtil::sendSuccess($this->lng->txt("file_added"),true);
                        
                        $this->ctrl->setParameter($this, "ref_id", $fileObj->getRefId());
                        if ($this->ctrl->getCmd() == "saveAndMeta")
                        {
                                $target = $this->ctrl->getLinkTargetByClass(array("ilobjfilegui", "ilmdeditorgui"), "listSection", "", false, false);
                                $target = str_replace("new_type=", "nt=", $target);
                                ilUtil::redirect($this->getReturnLocation("save", $target));
                        }
                        else
                        {
                                $this->ctrl->returnToParent($this);
                        }
                }
                else
                {
                        $this->single_form_gui->setValuesByPost();
                        $this->createObject("single_upload");
                }
        }

        function saveAndMetaObject()
        {
                $this->saveObject();
        }

        function updateObject()
        {
                global $ilTabs;
                
                $ilTabs->activateTab("id_edit");
                
                $this->initPropertiesForm('edit');
                if(!$this->form->checkInput())
                {
                        $this->form->setValuesByPost();
                        $this->tpl->setContent($this->form->getHTML());
                        return false;   
                }

                $data = $this->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 = $this->form->getInput('title');
                if(strlen(trim($title)) == 0)
                {
                        $title = $filename;
                }
                else
                {
                        $title = $this->object->checkFileExtension($filename,$title);
                }
                $this->object->setTitle($title);

                if (!empty($data["name"]))
                {
                        switch($this->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']);
                }
                $this->object->setDescription($this->form->getInput('description'));
                $this->update = $this->object->update();

                // BEGIN ChangeEvent: Record update event.
                if (!empty($data["name"]))
                {
                        require_once('Services/Tracking/classes/class.ilChangeEvent.php');
                        if (ilChangeEvent::_isActive())
                        {
                                global $ilUser;
                                ilChangeEvent::_recordWriteEvent($this->object->getId(), $ilUser->getId(), 'update');
                                ilChangeEvent::_catchupWriteEvents($this->object->getId(), $ilUser->getId());
                        }
                }
                // END ChangeEvent: Record update event.
                
                ilUtil::sendSuccess($this->lng->txt("msg_obj_modified"),true);
                ilUtil::redirect($this->ctrl->getLinkTarget($this,'edit','',false,false));
        }

        
        function editObject()
        {
                global $ilAccess, $ilTabs;

                if (!$ilAccess->checkAccess("write", "", $this->ref_id))
                {
                        $this->ilias->raiseError($this->lng->txt("msg_no_perm_write"),$this->ilias->error_obj->MESSAGE);
                }

                $ilTabs->activateTab("id_edit");

                $this->initPropertiesForm('edit');
                $this->getPropertiesValues('edit');
                
                $this->tpl->setContent($this->form->getHTML());
                return true;


                $fields = array();

                if ($_SESSION["error_post_vars"])
                {
                        // fill in saved values in case of error
                        $fields["title"] = ilUtil::prepareFormOutput($_SESSION["error_post_vars"]["Fobject"]["title"],true);
                        $fields["desc"] = ilUtil::prepareFormOutput($_SESSION["error_post_vars"]["Fobject"]["desc"], true);
                }
                else
                {
                        $fields["title"] = ilUtil::prepareFormOutput($this->object->getTitle());
                        $fields["desc"] = ilUtil::prepareFormOutput($this->object->getLongDescription());
                }
                
                $this->getTemplateFile("edit");
                $this->tpl->setVariable("TXT_TITLE", $this->lng->txt("title"));
                $this->tpl->setVariable("TITLE", $fields["title"]);
                $this->tpl->setVariable("TXT_DESC", $this->lng->txt("desc"));
                $this->tpl->setVariable("DESC", $fields["desc"]);
                $this->tpl->setVariable("TXT_REPLACE_FILE", $this->lng->txt("replace_file"));
                //$this->tpl->parseCurrentBlock();

                $obj_str = ($this->call_by_reference) ? "" : "&obj_id=".$this->obj_id;

                $this->tpl->setVariable("FORMACTION", $this->getFormAction("update",$this->ctrl->getFormAction($this, "update").$obj_str));
                $this->tpl->setVariable("TXT_HEADER", $this->lng->txt($this->object->getType()."_edit"));
                $this->tpl->setVariable("TARGET", $this->getTargetFrame("update"));
                $this->tpl->setVariable("TXT_CANCEL", $this->lng->txt("cancel"));
                $this->tpl->setVariable("TXT_SUBMIT", $this->lng->txt("save"));
                $this->tpl->setVariable("CMD_SUBMIT", "update");
                $this->tpl->setVariable("TXT_REQUIRED_FLD", $this->lng->txt("required_field"));
                //$this->tpl->parseCurrentBlock();
        }
        
        protected function getPropertiesValues($a_mode = 'edit')
        {
                if($a_mode == 'edit')
                {
                        $val['title'] = $this->object->getTitle();
                        $val['description'] = $this->object->getLongDescription();
                        $this->form->setValuesByArray($val);
                }
                return true;
        }
        
        protected function initPropertiesForm($a_mode)
        {
                global $lng;
                
                include_once('./Services/Form/classes/class.ilPropertyFormGUI.php');

                $this->form = new ilPropertyFormGUI();
                $this->form->setFormAction($this->ctrl->getFormAction($this),'update');
                $this->form->setTitle($this->lng->txt('file_edit'));
                $this->form->addCommandButton('update',$this->lng->txt('save'));
                $this->form->addCommandButton('cancel',$this->lng->txt('cancel'));
                        
                $title = new ilTextInputGUI($this->lng->txt('title'),'title');
                $title->setValue($this->object->getTitle());
                $title->setInfo($lng->txt("if_no_title_then_filename"));
                $this->form->addItem($title);
                
                $file = new ilFileInputGUI($this->lng->txt('obj_file'),'file');
                $file->setRequired(false);
//              $file->enableFileNameSelection('title');
                $this->form->addItem($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);
                        
                $desc = new ilTextAreaInputGUI($this->lng->txt('description'),'description');
                $desc->setRows(3);
                #$desc->setCols(40);
                $this->form->addItem($desc);
        }
        
        function sendFileObject()
        {
                global $ilAccess, $ilUser, $ilCtrl;
                
                if(ANONYMOUS_USER_ID == $ilUser->getId() && isset($_GET['transaction']) )
                {
                        $this->object->sendFile($_GET["hist_id"]);
                }

                if ($ilAccess->checkAccess("read", "", $this->ref_id))
                {
                        // BEGIN ChangeEvent: Record read event.
                        require_once('Services/Tracking/classes/class.ilChangeEvent.php');
                        if (ilChangeEvent::_isActive())
                        {
                                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.

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


        function versionsObject()
        {
                global $ilAccess, $ilTabs;
                
                $ilTabs->activateTab("id_versions");

                if (!$ilAccess->checkAccess("write", "", $_GET["ref_id"]))
                {
                        $this->ilErr->raiseError($this->lng->txt("permission_denied"),$this->ilErr->MESSAGE);
                }

                require_once("classes/class.ilHistoryGUI.php");
                
                $hist_gui =& new ilHistoryGUI($this->object->getId());
                
                // not nice, should be changed, if ilCtrl handling
                // has been introduced to administration
                $hist_html = $hist_gui->getVersionsTable(
                        array("ref_id" => $_GET["ref_id"], "cmd" => "versions",
                        "cmdClass" =>$_GET["cmdClass"], "cmdNode" =>$_GET["cmdNode"]));
                
                $this->tpl->setVariable("ADM_CONTENT", $hist_html);
        }
        
        function infoScreenObject()
        {
                $this->ctrl->setCmd("showSummary");
                $this->ctrl->setCmdClass("ilinfoscreengui");
                $this->infoScreen();
        }

        function infoScreen()
        {
                global $ilAccess, $ilTabs;
                
                $ilTabs->activateTab("id_info");

                if (!$ilAccess->checkAccess("visible", "", $this->ref_id))
                {
                        $this->ilias->raiseError($this->lng->txt("msg_no_perm_read"),$this->ilias->error_obj->MESSAGE);
                }

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

                if ($ilAccess->checkAccess("read", "sendfile", $this->ref_id))
                {
                        $info->addButton($this->lng->txt("file_read"), $this->ctrl->getLinkTarget($this, "sendfile"));
                }
                
                $info->enablePrivateNotes();
                
                if ($ilAccess->checkAccess("read", "", $_GET["ref_id"]))
                {
                        $info->enableNews();
                }

                // no news editing for files, just notifications
                $info->enableNewsEditing(false);
                if ($ilAccess->checkAccess("write", "", $_GET["ref_id"]))
                {
                        $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());

                // forward the command
                $this->ctrl->forwardCommand($info);
        }


        // get tabs
        function setTabs()
        {
                global $ilAccess, $ilTabs, $lng;

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

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

                if ($ilAccess->checkAccess("write", "", $this->ref_id))
                {
                        $ilTabs->addTab("id_edit",
                                $lng->txt("edit"),
                                $this->ctrl->getLinkTarget($this, "edit"));
                }

                if ($ilAccess->checkAccess("write", "", $this->ref_id))
                {
                        $ilTabs->addTab("id_versions",
                                $lng->txt("versions"),
                                $this->ctrl->getLinkTarget($this, "versions"));
                }

                // meta data
                if ($ilAccess->checkAccess("write", "", $this->ref_id))
                {
                        $ilTabs->addTab("id_meta",
                                $lng->txt("meta_data"),
                                $this->ctrl->getLinkTargetByClass(array('ilobjfilegui','ilmdeditorgui'),'listSection'));
                }

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

                if ($ilAccess->checkAccess("edit_permission", "", $this->ref_id))
                {
                                $ilTabs->addTab("id_permissions",
                                $lng->txt("perm_settings"),
                                $this->ctrl->getLinkTargetByClass(array(get_class($this),'ilpermissiongui'), "perm"));
                }
        }
        
        function _goto($a_target)
        {
                global $ilAccess, $ilErr, $lng;

                if ($ilAccess->checkAccess("visible", "", $a_target))
                {
                        $_GET["cmd"] = "infoScreen";
                        $_GET["ref_id"] = $a_target;
                        include("repository.php");
                        exit;
                }
                else if ($ilAccess->checkAccess("read", "", ROOT_FOLDER_ID))
                {
                        $_GET["cmd"] = "frameset";
                        $_GET["target"] = "";
                        $_GET["ref_id"] = ROOT_FOLDER_ID;
                        ilUtil::sendFailure(sprintf($lng->txt("msg_no_perm_read_item"),
                                ilObject::_lookupTitle(ilObject::_lookupObjId($a_target))), true);
                        include("repository.php");
                        exit;
                }

                $ilErr->raiseError($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, ""), "", $_GET["ref_id"]);
                }
        }

} // END class.ilObjFileGUI
?>