class.ilStructureObjectGUI.php

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<?php
 
/* Copyright (c) 1998-2011 ILIAS open source, Extended GPL, see docs/LICENSE */
 
 
require_once("./Modules/LearningModule/classes/class.ilLMObjectGUI.php");
require_once("./Modules/LearningModule/classes/class.ilLMObject.php");
 
class ilStructureObjectGUI extends ilLMObjectGUI
{
    protected $user;
 
    protected $error;
 
    protected $tabs;
 
    protected $log;
 
    public $obj;        // structure object
    public $tree;
 
    public function __construct(&$a_content_obj, &$a_tree)
    {
        global $DIC;
 
        $this->tree = $DIC->repositoryTree();
        $this->user = $DIC->user();
        $this->ctrl = $DIC->ctrl();
        $this->lng = $DIC->language();
        $this->error = $DIC["ilErr"];
        $this->tabs = $DIC->tabs();
        $this->log = $DIC["ilLog"];
        $this->tpl = $DIC["tpl"];
        parent::__construct($a_content_obj);
        $this->tree = $a_tree;
    }
 
    public function setStructureObject(&$a_st_object)
    {
        $this->obj = $a_st_object;
    }
    
    
    public function getType()
    {
        return "st";
    }
 
    public function executeCommand()
    {
        //echo "<br>:cmd:".$this->ctrl->getCmd().":cmdClass:".$this->ctrl->getCmdClass().":";
        $next_class = $this->ctrl->getNextClass($this);
        $cmd = $this->ctrl->getCmd();
 
        switch ($next_class) {
            case 'ilobjectmetadatagui':
                
                $this->setTabs();
            
                include_once 'Services/Object/classes/class.ilObjectMetaDataGUI.php';
                $md_gui = new ilObjectMetaDataGUI($this->content_object, $this->obj->getType(), $this->obj->getId());
                $md_gui->addMDObserver($this->obj, 'MDUpdateListener', 'General');
                $md_gui->addMDObserver($this->obj, 'MDUpdateListener', 'Educational'); // #9510
                $this->ctrl->forwardCommand($md_gui);
                break;
 
            case "ilconditionhandlergui":
        $ilTabs = $this->tabs;
                include_once './Services/AccessControl/classes/class.ilConditionHandlerGUI.php';
 
                $this->setTabs();
                $this->initConditionHandlerInterface();
                $this->ctrl->forwardCommand($this->condHI);
                $ilTabs->setTabActive('preconditions');
                break;
 
            default:
                if ($cmd == 'listConditions') {
                    $this->setTabs();
                    $this->initConditionHandlerInterface();
                    $this->condHI->executeCommand();
                } elseif (($cmd == "create") && ($_POST["new_type"] == "pg")) {
                    $this->setTabs();
                    $pg_gui = new ilLMPageObjectGUI($this->content_object);
                    $pg_gui->executeCommand();
                } else {
                    $this->$cmd();
                }
                break;
        }
    }
 
 
    public function create()
    {
        if ($_GET["obj_id"] != "") {
            $this->setTabs();
        }
        parent::create();
    }
 
    public function edit()
    {
        $this->view();
    }
 
    /*
    * display pages of structure object
    */
    public function view()
    {
        $tree = $this->tree;
        $ilUser = $this->user;
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
 
        $this->showHierarchy();
    }
 
 
    public function showHierarchy()
    {
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
        
        $this->setTabs();
        
        $ilCtrl->setParameter($this, "backcmd", "showHierarchy");
        
        include_once("./Modules/LearningModule/classes/class.ilChapterHierarchyFormGUI.php");
        $form_gui = new ilChapterHierarchyFormGUI($this->content_object->getType(), $_GET["transl"]);
        $form_gui->setFormAction($ilCtrl->getFormAction($this));
        $form_gui->setTitle($this->obj->getTitle());
        $form_gui->setIcon(ilUtil::getImagePath("icon_st.svg"));
        $form_gui->setTree($this->tree);
        $form_gui->setCurrentTopNodeId($this->obj->getId());
        $form_gui->addMultiCommand($lng->txt("delete"), "delete");
        $form_gui->addMultiCommand($lng->txt("cut"), "cutItems");
        $form_gui->addMultiCommand($lng->txt("copy"), "copyItems");
        $form_gui->addMultiCommand($lng->txt("cont_de_activate"), "activatePages");
        if ($this->content_object->getLayoutPerPage()) {
            $form_gui->addMultiCommand($lng->txt("cont_set_layout"), "setPageLayout");
        }
        $form_gui->setDragIcon(ilUtil::getImagePath("icon_pg.svg"));
        $form_gui->addCommand($lng->txt("cont_save_all_titles"), "saveAllTitles");
        $form_gui->addHelpItem($lng->txt("cont_chapters_after_pages"));
        $up_gui = "ilobjlearningmodulegui";
        $ilCtrl->setParameterByClass($up_gui, "active_node", $this->obj->getId());
        $ilCtrl->setParameterByClass($up_gui, "active_node", "");
 
        $ctpl = new ilTemplate("tpl.chap_and_pages.html", true, true, "Modules/LearningModule");
        $ctpl->setVariable("HIERARCHY_FORM", $form_gui->getHTML());
        $ilCtrl->setParameter($this, "obj_id", $_GET["obj_id"]);
        
        include_once("./Modules/LearningModule/classes/class.ilObjContentObjectGUI.php");
        $ml_head = ilObjContentObjectGUI::getMultiLangHeader($this->content_object->getId(), $this);
        
        $this->tpl->setContent($ml_head . $ctpl->get());
    }
    
    public function cutItems($a_return = "view")
    {
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        
        $items = ilUtil::stripSlashesArray($_POST["id"]);
        if (!is_array($items)) {
            ilUtil::sendFailure($lng->txt("no_checkbox"), true);
            $ilCtrl->redirect($this, "showHierarchy");
        }
        
        $todel = array();                       // delete IDs < 0 (needed for non-js editing)
        foreach ($items as $k => $item) {
            if ($item < 0) {
                $todel[] = $k;
            }
        }
        foreach ($todel as $k) {
            unset($items[$k]);
        }
        
        if (!ilLMObject::uniqueTypesCheck($items)) {
            ilUtil::sendFailure($lng->txt("cont_choose_pages_or_chapters_only"), true);
            $ilCtrl->redirect($this, "showHierarchy");
        }
 
        ilLMObject::clipboardCut($this->content_object->getId(), $items);
        ilEditClipboard::setAction("cut");
        //ilUtil::sendInfo($this->lng->txt("msg_cut_clipboard"), true);
        ilUtil::sendInfo($lng->txt("cont_selected_items_have_been_cut"), true);
 
        $ilCtrl->redirect($this, $a_return);
    }
    
    public function copyItems($a_return = "view")
    {
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        
        $items = ilUtil::stripSlashesArray($_POST["id"]);
        if (!is_array($items)) {
            ilUtil::sendFailure($lng->txt("no_checkbox"), true);
            $ilCtrl->redirect($this, "showHierarchy");
        }
        
        $todel = array();                               // delete IDs < 0 (needed for non-js editing)
        foreach ($items as $k => $item) {
            if ($item < 0) {
                $todel[] = $k;
            }
        }
        foreach ($todel as $k) {
            unset($items[$k]);
        }
        
        if (!ilLMObject::uniqueTypesCheck($items)) {
            ilUtil::sendFailure($lng->txt("cont_choose_pages_or_chapters_only"), true);
            $ilCtrl->redirect($this, "showHierarchy");
        }
 
        ilLMObject::clipboardCopy($this->content_object->getId(), $items);
        ilEditClipboard::setAction("copy");
        
        ilUtil::sendInfo($lng->txt("cont_selected_items_have_been_copied"), true);
        $ilCtrl->redirect($this, $a_return);
    }
    
    public function saveAllTitles()
    {
        $ilCtrl = $this->ctrl;
        
        ilLMObject::saveTitles($this->content_object, ilUtil::stripSlashesArray($_POST["title"]), $_GET["transl"]);
 
        ilUtil::sendSuccess($this->lng->txt("lm_save_titles"), true);
        $ilCtrl->redirect($this, "showHierarchy");
    }
    
    /*
    * display subchapters of structure object
    */
    public function subchap()
    {
        $tree = $this->tree;
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        $ilUser = $this->user;
 
        $this->setTabs();
 
        $this->tpl->addBlockFile("ADM_CONTENT", "adm_content", "tpl.structure_edit.html", "Modules/LearningModule");
        $num = 0;
 
        $this->tpl->setCurrentBlock("form");
        $this->ctrl->setParameter($this, "backcmd", "subchap");
        $this->tpl->setVariable("FORMACTION", $this->ctrl->getFormAction($this));
        $this->tpl->setVariable("HEADER_TEXT", $this->lng->txt("cont_subchapters"));
        $this->tpl->setVariable("CHECKBOX_TOP", IL_FIRST_NODE);
 
        $cnt = 0;
        $childs = $this->tree->getChilds($this->obj->getId());
        foreach ($childs as $child) {
            if ($child["type"] != "st") {
                continue;
            }
            $this->tpl->setCurrentBlock("table_row");
            // color changing
            $css_row = ilUtil::switchColor($cnt++, "tblrow1", "tblrow2");
 
            // checkbox
            $this->tpl->setVariable("CHECKBOX_ID", $child["obj_id"]);
            $this->tpl->setVariable("CSS_ROW", $css_row);
            $this->tpl->setVariable("IMG_OBJ", ilUtil::getImagePath("icon_st.svg"));
 
            // type
            $this->ctrl->setParameterByClass("ilStructureObjectGUI", "obj_id", $child["obj_id"]);
            $link = $this->ctrl->getLinkTargetByClass("ilStructureObjectGUI", "view");
            $this->tpl->setVariable("LINK_TARGET", $link);
 
            // title
            $this->tpl->setVariable(
                "TEXT_CONTENT",
                ilStructureObject::_getPresentationTitle(
                    $child["obj_id"],
                    IL_CHAPTER_TITLE,
                    $this->content_object->isActiveNumbering()
                )
            );
 
            $this->tpl->parseCurrentBlock();
        }
        if ($cnt == 0) {
            $this->tpl->setCurrentBlock("notfound");
            $this->tpl->setVariable("NUM_COLS", 3);
            $this->tpl->setVariable("TXT_OBJECT_NOT_FOUND", $this->lng->txt("obj_not_found"));
            $this->tpl->parseCurrentBlock();
        }
        //else
        //{
        // SHOW VALID ACTIONS
        $this->tpl->setVariable("NUM_COLS", 3);
        $acts = array("delete" => "delete", "cutChapter" => "cut",
                "copyChapter" => "copyChapter");
        if ($ilUser->clipboardHasObjectsOfType("st")) {
            $acts["pasteChapter"] =  "pasteChapter";
        }
        $this->showActions($acts);
        //}
 
        // SHOW POSSIBLE SUB OBJECTS
        $this->tpl->setVariable("NUM_COLS", 3);
        //$this->showPossibleSubObjects("st");
        $subobj = array("st");
        $opts = ilUtil::formSelect(12, "new_type", $subobj);
        //$this->tpl->setVariable("IMG_ARROW", ilUtil::getImagePath("arrow_downright.svg"));
        $this->tpl->setCurrentBlock("add_object");
        $this->tpl->setVariable("SELECT_OBJTYPE", $opts);
        //$this->tpl->setVariable("FORMACTION_OBJ_ADD", "adm_object.php?cmd=create&ref_id=".$_GET["ref_id"]);
        $this->tpl->setVariable("BTN_NAME", "create");
        $this->tpl->setVariable("TXT_ADD", $this->lng->txt("insert"));
        $this->tpl->parseCurrentBlock();
 
        //$this->tpl->setVariable("NUM_COLS", 2);
        //$this->showPossibleSubObjects("st");
 
        $this->tpl->setCurrentBlock("form");
        $this->tpl->parseCurrentBlock();
 
        $ilCtrl->setParameter($this, "obj_id", $_GET["obj_id"]);
    }
 
    public function add_cell($val, $link = "")
    {
        if (!empty($link)) {
            $this->tpl->setCurrentBlock("begin_link");
            $this->tpl->setVariable("LINK_TARGET", $link);
            $this->tpl->parseCurrentBlock();
            $this->tpl->touchBlock("end_link");
        }
 
        $this->tpl->setCurrentBlock("text");
        $this->tpl->setVariable("TEXT_CONTENT", $val);
        $this->tpl->parseCurrentBlock();
        $this->tpl->setCurrentBlock("table_cell");
        $this->tpl->parseCurrentBlock();
    }
 
 
    public function save()
    {
        $this->obj = new ilStructureObject($this->content_object);
 
        $this->obj->setType("st");
        $this->obj->setTitle(ilUtil::stripSlashes($_POST["Fobject"]["title"]));
        $this->obj->setDescription(ilUtil::stripSlashes($_POST["Fobject"]["desc"]));
        $this->obj->setLMId($this->content_object->getId());
        $this->obj->create();
 
        $this->putInTree();
 
        // check the tree
        $this->checkTree();
 
        if (!empty($_GET["obj_id"])) {
            $this->ctrl->redirect($this, "subchap");
        }
    }
 
    public function putInTree()
    {
        //echo "st:putInTree";
        // chapters should be behind pages in the tree
        // so if target is first node, the target is substituted with
        // the last child of type pg
        if ($_GET["target"] == IL_FIRST_NODE) {
            $tree = new ilTree($this->content_object->getId());
            $tree->setTableNames('lm_tree', 'lm_data');
            $tree->setTreeTablePK("lm_id");
 
            // determine parent node id
            $parent_id = (!empty($_GET["obj_id"]))
                ? $_GET["obj_id"]
                : $tree->getRootId();
            // determine last child of type pg
            $childs = $tree->getChildsByType($parent_id, "pg");
            if (count($childs) != 0) {
                $_GET["target"] = $childs[count($childs) - 1]["obj_id"];
            }
        }
        if (empty($_GET["target"])) {
            $_GET["target"] = IL_LAST_NODE;
        }
 
        parent::putInTree();
    }
 
    public function cutPage()
    {
        $this->cutItems();
    }
 
    public function copyPage()
    {
        $this->copyItems();
    }
 
    public function pastePage()
    {
        $ilUser = $this->user;
        $ilErr = $this->error;
        
        if (!$ilUser->clipboardHasObjectsOfType("pg")) {
            $ilErr->raiseError($this->lng->txt("no_page_in_clipboard"), $ilErr->MESSAGE);
        }
 
        return $this->insertPageClip();
    }
 
 
    public function cutChapter()
    {
        $this->cutItems("subchap");
    }
 
    public function copyChapter()
    {
        $this->copyItems("subchap");
    }
 
    public function pasteChapter()
    {
        $ilUser = $this->user;
        
        return $this->insertChapterClip(false, "subchap");
    }
 
    public function activatePages()
    {
        $lng = $this->lng;
        
        include_once("./Modules/LearningModule/classes/class.ilLMPage.php");
        if (is_array($_POST["id"])) {
            $act_items = array();
            // get all "top" ids, i.e. remove ids, that have a selected parent
            foreach ($_POST["id"] as $id) {
                $path = $this->tree->getPathId($id);
                $take = true;
                foreach ($path as $path_id) {
                    if ($path_id != $id && in_array($path_id, $_POST["id"])) {
                        $take = false;
                    }
                }
                if ($take) {
                    $act_items[] = $id;
                }
            }
 
            
            foreach ($act_items as $id) {
                $childs = $this->tree->getChilds($id);
                foreach ($childs as $child) {
                    if (ilLMObject::_lookupType($child["child"]) == "pg") {
                        $act = ilLMPage::_lookupActive(
                            $child["child"],
                            $this->content_object->getType()
                        );
                        ilLMPage::_writeActive(
                            $child["child"],
                            $this->content_object->getType(),
                            !$act
                        );
                    }
                }
                if (ilLMObject::_lookupType($id) == "pg") {
                    $act = ilLMPage::_lookupActive(
                        $id,
                        $this->content_object->getType()
                    );
                    ilLMPage::_writeActive(
                        $id,
                        $this->content_object->getType(),
                        !$act
                    );
                }
            }
        } else {
            ilUtil::sendFailure($lng->txt("no_checkbox"), true);
        }
        
        $this->ctrl->redirect($this, "view");
    }
 
    //
    // Condition handling stuff
    //
 
    public function initConditionHandlerInterface()
    {
        include_once("./Services/AccessControl/classes/class.ilConditionHandlerGUI.php");
 
        $this->condHI = new ilConditionHandlerGUI($this);
        $this->condHI->setBackButtons(array());
        $this->condHI->setAutomaticValidation(false);
        $this->condHI->setTargetType("st");
        $this->condHI->setTargetRefId($this->content_object->getRefId());
        $this->condHI->setTargetId($this->obj->getId());
        $this->condHI->setTargetTitle($this->obj->getTitle());
    }
 
 
    public function cancel()
    {
        if ($_GET["obj_id"] != 0) {
            if ($_GET["new_type"] == "pg") {
                $this->ctrl->redirect($this, "view");
            } else {
                $this->ctrl->redirect($this, "subchap");
            }
        }
    }
 
 
    public function setTabs()
    {
        $ilTabs = $this->tabs;
        $ilUser = $this->user;
        $lng = $this->lng;
 
        // subelements
        $ilTabs->addTarget(
            "cont_pages_and_subchapters",
            $this->ctrl->getLinkTarget($this, 'showHierarchy'),
            array("view", "showHierarchy"),
            get_class($this)
        );
 
        // preconditions
        $ilTabs->addTarget(
            "preconditions",
            $this->ctrl->getLinkTarget($this, 'listConditions'),
            "listConditions",
            get_class($this)
        );
 
        // metadata
        include_once "Services/Object/classes/class.ilObjectMetaDataGUI.php";
        $mdgui = new ilObjectMetaDataGUI($this->content_object, $this->obj->getType(), $this->obj->getId());
        $mdtab = $mdgui->getTab();
        if ($mdtab) {
            $ilTabs->addTarget(
                "meta_data",
                $mdtab,
                "",
                "ilmdeditorgui"
            );
        }
             
        $this->tpl->setTitleIcon(ilUtil::getImagePath("icon_st.svg"));
        $this->tpl->setTitle(
            $this->lng->txt($this->obj->getType()) . ": " . $this->obj->getTitle()
        );
 
        // presentation view
        $ilTabs->addNonTabbedLink(
            "pres_mode",
            $lng->txt("cont_presentation_view"),
            ILIAS_HTTP_PATH . "/goto.php?target=st_" . $this->obj->getId(),
            "_top"
        );
    }
 
    public static function _goto($a_target, $a_target_ref_id = "")
    {
        global $DIC;
 
        $rbacsystem = $DIC->rbac()->system();
        $ilErr = $DIC["ilErr"];
        $lng = $DIC->language();
        $ilAccess = $DIC->access();
 
        // determine learning object
        $lm_id = ilLMObject::_lookupContObjID($a_target);
 
        // get all references
        $ref_ids = ilObject::_getAllReferences($lm_id);
        
        // always try passed ref id first
        if (in_array($a_target_ref_id, $ref_ids)) {
            $ref_ids = array_merge(array($a_target_ref_id), $ref_ids);
        }
 
        // check read permissions
        foreach ($ref_ids as $ref_id) {
            // Permission check
            if ($ilAccess->checkAccess("read", "", $ref_id)) {
                // don't redirect anymore, just set parameters
                // (goto.php includes  "ilias.php")
                $_GET["baseClass"] = "ilLMPresentationGUI";
                $_GET["obj_id"] = $a_target;
                $_GET["ref_id"] = $ref_id;
                include_once("ilias.php");
                exit;
                ;
            }
        }
        
        if ($ilAccess->checkAccess("read", "", ROOT_FOLDER_ID)) {
            ilUtil::sendFailure(sprintf(
                $lng->txt("msg_no_perm_read_item"),
                ilObject::_lookupTitle($lm_id)
            ), true);
            include_once("./Services/Object/classes/class.ilObjectGUI.php");
            ilObjectGUI::_gotoRepositoryRoot();
        }
 
        $ilErr->raiseError($lng->txt("msg_no_perm_read_lm"), $ilErr->FATAL);
    }
 
    public function insertChapter($a_as_sub = false)
    {
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        
        include_once("./Modules/LearningModule/classes/class.ilChapterHierarchyFormGUI.php");
        
        $num = ilChapterHierarchyFormGUI::getPostMulti();
        $node_id = ilChapterHierarchyFormGUI::getPostNodeId();
        
        if ($a_as_sub) {                // as subchapter
            if (!ilChapterHierarchyFormGUI::getPostFirstChild()) {      // insert under parent
                $parent_id = $node_id;
                $target = "";
            } else {                                                                                                    // we shouldnt end up here
                $ilCtrl->redirect($this, "showHierarchy");
                return;
            }
        } else {                                // as chapter
            if (!ilChapterHierarchyFormGUI::getPostFirstChild()) {      // insert after node id
                $parent_id = $this->tree->getParentId($node_id);
                $target = $node_id;
            } else {                                                                                                    // insert as first child
                $parent_id = $node_id;
                $target = IL_FIRST_NODE;
            }
        }
        for ($i = 1; $i <= $num; $i++) {
            $chap = new ilStructureObject($this->content_object);
            $chap->setType("st");
            $chap->setTitle($lng->txt("cont_new_chap"));
            $chap->setLMId($this->content_object->getId());
            $chap->create();
            ilLMObject::putInTree($chap, $parent_id, $target);
        }
 
        $ilCtrl->redirect($this, "view");
    }
    
    public function insertSubchapter()
    {
        $ilCtrl = $this->ctrl;
        
        $this->insertChapter(true);
    }
 
    public function insertChapterClip($a_as_sub = false, $a_return = "view")
    {
        $ilUser = $this->user;
        $ilCtrl = $this->ctrl;
        $ilLog = $this->log;
        
        $ilLog->write("Insert Chapter From Clipboard");
        
        include_once("./Modules/LearningModule/classes/class.ilChapterHierarchyFormGUI.php");
        
        $node_id = ilChapterHierarchyFormGUI::getPostNodeId();
        $first_child = ilChapterHierarchyFormGUI::getPostFirstChild();
 
        if ($a_as_sub) {                // as subchapter
            if (!$first_child) {        // insert under parent
                $parent_id = $node_id;
                $target = "";
            } else {                                                                                                    // we shouldnt end up here
                $ilCtrl->redirect($this, "showHierarchy");
                return;
            }
        } else {        // as chapter
            if (!$first_child) {        // insert after node id
                $parent_id = $this->tree->getParentId($node_id);
                $target = $node_id;
            } else {                                                                                                    // insert as first child
                $parent_id = $node_id;
                $target = IL_FIRST_NODE;
                
                // do not move a chapter in front of a page
                $childs = $this->tree->getChildsByType($parent_id, "pg");
                if (count($childs) != 0) {
                    $target = $childs[count($childs) - 1]["obj_id"];
                }
            }
        }
        
        // copy and paste
        $chapters = $ilUser->getClipboardObjects("st", true);
        $copied_nodes = array();
        
        foreach ($chapters as $chap) {
            $ilLog->write("Call pasteTree, Target LM: " . $this->content_object->getId() . ", Chapter ID: " . $chap["id"]
                . ", Parent ID: " . $parent_id . ", Target: " . $target);
            $cid = ilLMObject::pasteTree(
                $this->content_object,
                $chap["id"],
                $parent_id,
                $target,
                $chap["insert_time"],
                $copied_nodes,
                (ilEditClipboard::getAction() == "copy")
            );
            $target = $cid;
        }
        ilLMObject::updateInternalLinks($copied_nodes);
 
        if (ilEditClipboard::getAction() == "cut") {
            $ilUser->clipboardDeleteObjectsOfType("pg");
            $ilUser->clipboardDeleteObjectsOfType("st");
            ilEditClipboard::clear();
        }
        
        $this->content_object->checkTree();
        $ilCtrl->redirect($this, $a_return);
    }
 
    public function insertSubchapterClip()
    {
        $this->insertChapterClip(true);
    }
 
    public function insertPage()
    {
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        
        include_once("./Modules/LearningModule/classes/class.ilChapterHierarchyFormGUI.php");
        
        $num = ilChapterHierarchyFormGUI::getPostMulti();
        $node_id = ilChapterHierarchyFormGUI::getPostNodeId();
        
        if (!ilChapterHierarchyFormGUI::getPostFirstChild()) {  // insert after node id
            $parent_id = $this->tree->getParentId($node_id);
            $target = $node_id;
        } else {                                                                                                        // insert as first child
            $parent_id = $node_id;
            $target = IL_FIRST_NODE;
        }
 
        for ($i = 1; $i <= $num; $i++) {
            $page = new ilLMPageObject($this->content_object);
            $page->setType("pg");
            $page->setTitle($lng->txt("cont_new_page"));
            $page->setLMId($this->content_object->getId());
            $page->create();
            ilLMObject::putInTree($page, $parent_id, $target);
        }
 
        $ilCtrl->redirect($this, "showHierarchy");
    }
 
    public function insertPageClip()
    {
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;
        
        include_once("./Modules/LearningModule/classes/class.ilChapterHierarchyFormGUI.php");
        
        $node_id = ilChapterHierarchyFormGUI::getPostNodeId();
        $first_child = ilChapterHierarchyFormGUI::getPostFirstChild();
        
        if (!$first_child) {    // insert after node id
            $parent_id = $this->tree->getParentId($node_id);
            $target = $node_id;
        } else {                                                                                                        // insert as first child
            $parent_id = $node_id;
            $target = IL_FIRST_NODE;
        }
 
        // cut and paste
        $pages = $ilUser->getClipboardObjects("pg");
        $copied_nodes = array();
        foreach ($pages as $pg) {
            $cid = ilLMObject::pasteTree(
                $this->content_object,
                $pg["id"],
                $parent_id,
                $target,
                $pg["insert_time"],
                $copied_nodes,
                (ilEditClipboard::getAction() == "copy")
            );
            $target = $cid;
        }
        ilLMObject::updateInternalLinks($copied_nodes);
 
        if (ilEditClipboard::getAction() == "cut") {
            $ilUser->clipboardDeleteObjectsOfType("pg");
            $ilUser->clipboardDeleteObjectsOfType("st");
            ilEditClipboard::clear();
        }
        
        $ilCtrl->redirect($this, "view");
    }
 
    
    public function proceedDragDrop()
    {
        $ilCtrl = $this->ctrl;
 
        //echo "-".$_POST["il_hform_source_id"]."-".$_POST["il_hform_target_id"]."-".$_POST["il_hform_fc"]."-";
        $this->content_object->executeDragDrop(
            $_POST["il_hform_source_id"],
            $_POST["il_hform_target_id"],
            $_POST["il_hform_fc"],
            $_POST["il_hform_as_subitem"]
        );
        $ilCtrl->redirect($this, "showHierarchy");
    }
    
    
    public function setPageLayout()
    {
        $tpl = $this->tpl;
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
 
        if (!is_array($_POST["id"])) {
            ilUtil::sendFailure($lng->txt("no_checkbox"), true);
            $ilCtrl->redirect($this, "showHierarchy");
        }
        
        $this->initSetPageLayoutForm();
        
        $tpl->setContent($this->form->getHTML());
    }
    
    public function initSetPageLayoutForm()
    {
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
    
        include_once("Services/Form/classes/class.ilPropertyFormGUI.php");
        $this->form = new ilPropertyFormGUI();
        
        if (is_array($_POST["id"])) {
            foreach ($_POST["id"] as $id) {
                $hi = new ilHiddenInputGUI("id[]");
                $hi->setValue($id);
                $this->form->addItem($hi);
            }
        }
        $layout = ilObjContentObjectGUI::getLayoutOption(
            $lng->txt("cont_layout"),
            "layout",
            $this->content_object->getLayout()
        );
 
        $this->form->addItem($layout);
    
        $this->form->addCommandButton("savePageLayout", $lng->txt("save"));
        $this->form->addCommandButton("showHierarchy", $lng->txt("cancel"));
        
        $this->form->setTitle($lng->txt("cont_set_layout"));
        $this->form->setFormAction($ilCtrl->getFormAction($this));
    }
    
    public function savePageLayout()
    {
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
        
        foreach ($_POST["id"] as $id) {
            $id = ilUtil::stripSlashes($id);
            ilLMPageObject::writeLayout(
                ilUtil::stripSlashes($id),
                ilUtil::stripSlashes($_POST["layout"]),
                $this->content_object
            );
        }
        ilUtil::sendSuccess($lng->txt("msg_obj_modified"), true);
        $ilCtrl->redirect($this, "showHierarchy");
    }
 
    public function editMasterLanguage()
    {
        $ilCtrl = $this->ctrl;
        
        $ilCtrl->setParameter($this, "transl", "");
        $ilCtrl->redirect($this, "showHierarchy");
    }
 
    public function switchToLanguage()
    {
        $ilCtrl = $this->ctrl;
        
        $ilCtrl->setParameter($this, "transl", $_GET["totransl"]);
        $ilCtrl->redirect($this, "showHierarchy");
    }
}