class.ilObjStudyProgrammeTreeGUI.php

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<?php
/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */
require_once("./Modules/StudyProgramme/classes/class.ilObjStudyProgrammeTreeExplorerGUI.php");
require_once("./Services/UIComponent/Modal/classes/class.ilModalGUI.php");
require_once("./Services/Accordion/classes/class.ilAccordionGUI.php");
require_once("./Modules/StudyProgramme/classes/helpers/class.ilAsyncContainerSelectionExplorer.php");
require_once("./Modules/StudyProgramme/classes/helpers/class.ilAsyncPropertyFormGUI.php");
require_once('./Services/Container/classes/class.ilContainerSorting.php');
require_once("./Services/Utilities/classes/class.ilConfirmationGUI.php");
require_once("./Modules/StudyProgramme/classes/helpers/class.ilAsyncNotifications.php");
require_once("./Modules/CourseReference/classes/class.ilObjCourseReference.php");

class ilObjStudyProgrammeTreeGUI {
        public $ctrl;

        public $tpl;

        protected $access;

        public $object;
        protected $locator;

        protected $log;

        public $ilias;

        public $lng;

        protected $ref_id;

        protected $tree;

        protected $modal_id;

        protected $async_output_handler;

        /*
         * @var ilToolbar
         */
        public $toolbar;

        public function __construct($a_ref_id) {
                global $tpl, $ilCtrl, $ilAccess, $ilToolbar, $ilLocator, $tree, $lng, $ilLog, $ilias;

                $this->ref_id = $a_ref_id;
                $this->tpl = $tpl;
                $this->ctrl = $ilCtrl;
                $this->access = $ilAccess;
                $this->locator = $ilLocator;
                $this->tree = $tree;
                $this->toolbar = $ilToolbar;
                $this->log = $ilLog;
                $this->ilias = $ilias;
                $this->lng = $lng;
                $this->modal_id = "tree_modal";
                $this->async_output_handler = new ilAsyncOutputHandler();

                $this->initTree();

                $lng->loadLanguageModule("prg");
        }


        protected function initTree() {
                $this->tree = new ilObjStudyProgrammeTreeExplorerGUI($this->ref_id, $this->modal_id, "prg_tree", $this, 'view');

                $js_url = rawurldecode($this->ctrl->getLinkTarget($this, 'saveTreeOrder', '', true, false));
                $this->tree->addJsConf('save_tree_url', $js_url);
                $this->tree->addJsConf('save_button_id', 'save_order_button');
                $this->tree->addJsConf('cancel_button_id', 'cancel_order_button');
        }


        public function executeCommand() {
                $cmd = $this->ctrl->getCmd();

                $this->getToolbar();

                if ($cmd == "") {
                        $cmd = "view";
                }

                // handles tree commands ("openNode", "closeNode", "getNodeAsync")
                if($this->tree->handleCommand()) {
                        exit();
                }

                switch ($cmd) {
                        case "view":
                        case "create":
                        case "save":
                        case "cancel":
                        case "delete":
                        case "confirmedDelete":
                        case "cancelDelete":
                        case "getContainerSelectionExplorer":
                        case "saveTreeOrder":
                        case "createNewLeaf":

                                $content = $this->$cmd();
                                break;
                        default:
                                throw new ilException("ilObjStudyProgrammeTreeGUI: ".
                                        "Command not supported: $cmd");
                }

                ilAsyncOutputHandler::handleAsyncOutput($content);
        }


        protected function view() {

                $output = $this->tree->getHTML();
                $output .= $this->initAsyncUIElements();

                return $output;
        }


        protected function cancel() {
                return ilAsyncOutputHandler::encodeAsyncResponse();
        }


        protected function saveTreeOrder() {
                $this->checkAccessOrFail('write');
                
                if(!isset($_POST['tree']) || is_null(json_decode(stripslashes($_POST['tree'])))) {
                        throw new ilStudyProgrammeTreeException("There is no tree data to save!");
                }

                // saves order recursive
                $this->storeTreeOrder(json_decode(stripslashes($_POST['tree'])));

                return ilAsyncOutputHandler::encodeAsyncResponse(array('success'=>true, 'message'=>$this->lng->txt('prg_saved_order_successful')));
        }


        protected function storeTreeOrder($nodes, $container_sorting = null, $parent_ref_id = null) {
                $sorting_position = array();
                $position_count = 10;

                $parent_node = ($parent_ref_id === null)? ilObjectFactoryWrapper::getInstanceByRefId($this->ref_id) : ilObjectFactoryWrapper::getInstanceByRefId($parent_ref_id);
                $container_sorting = ($container_sorting === null) ? ilContainerSorting::_getInstance(ilObject::_lookupObjectId($this->ref_id)) : $container_sorting;

                foreach($nodes as $node) {
                        // get ref_id from json
                        $id = $node->attr->id;
                        $id = substr($id, strrpos($id, "_")+1);

                        $sorting_position[$id] = $position_count;
                        $position_count+= 10;

                        $node_obj = ilObjectFactoryWrapper::getInstanceByRefId($id);
                        if($node_obj instanceof ilObjStudyProgramme) {
                                $node_obj->moveTo($parent_node);
                        } else {
                                // TODO: implement a method on ilObjStudyProgramme to move leafs
                                global $tree, $rbacadmin;

                                $tree->moveTree($node_obj->getRefId(), $parent_node->getRefId());
                                $rbacadmin->adjustMovedObjectPermissions($node_obj->getRefId(), $parent_node->getRefId());
                        }

                        // recursion if there are children
                        if(isset($node->children)) {
                                $this->storeTreeOrder($node->children, ilContainerSorting::_getInstance(ilObject::_lookupObjectId($id)), $id);
                        }
                }
                $container_sorting->savePost($sorting_position);
        }


        protected function createNewLeaf() {
                $this->checkAccessOrFail('create', (int) $_POST['parent_id']);

                if(isset($_POST['target_id'], $_POST['type'], $_POST['parent_id'])) {
                        $target_id = (int) $_POST['target_id'];
                        $parent_id = (int) $_POST['parent_id'];

                        // TODO: more generic way for implementing different type of leafs
                        $course_ref = new ilObjCourseReference();
                        $course_ref->setTitleType(ilObjCourseReference::TITLE_TYPE_REUSE);
                        $course_ref->setTargetRefId($target_id);

                        $course_ref->create();
                        $course_ref->createReference();

                        $course_ref->putInTree($parent_id);

                        // This is how its done in ILIAS. If you set the target ID before the creation, it won't work
                        $course_ref->setTargetId(ilObject::_lookupObjectId($target_id));
                        $course_ref->update();
                }

                return ilAsyncOutputHandler::encodeAsyncResponse(array('success'=>true, 'message'=>$this->lng->txt('prg_added_course_ref_successful')));
        }


        protected function getContainerSelectionExplorer($convert_to_string = true) {
                $create_leaf_form = new ilAsyncContainerSelectionExplorer(rawurldecode($this->ctrl->getLinkTarget($this, 'createNewLeaf', '', true, false)));
                $create_leaf_form->setId("select_course_explorer");

                $ref_expand = ROOT_FOLDER_ID;
                if(isset($_GET['ref_repexpand'])) {
                        $ref_expand = (int) $_GET['ref_repexpand'];
                }

                $create_leaf_form->setExpand($ref_expand);
                $create_leaf_form->setExpandTarget($this->ctrl->getLinkTarget($this,'getContainerSelectionExplorer'));
                $create_leaf_form->setAsynchExpanding(true);
                $create_leaf_form->setTargetGet('target_id');
                $create_leaf_form->setFrameTarget("_self");
                $create_leaf_form->setClickable('crs', true);
                $create_leaf_form->setTargetType('crs');
                $create_leaf_form->setOutput(0);

                if($convert_to_string)
                        return $create_leaf_form->getOutput();
                else
                        return $create_leaf_form;
        }


        protected function getCreationForm() {
                $tmp_obj = new ilObjStudyProgrammeGUI();

                $create_node_form = $tmp_obj->getAsyncCreationForm();
                $create_node_form->setTitle("");
                $this->ctrl->setParameterByClass("ilobjstudyprogrammegui", "new_type", "prg");
                $create_node_form->setFormAction($this->ctrl->getFormActionByClass("ilobjstudyprogrammegui", "save"));

                return $create_node_form;
        }


        protected function create() {
                $parent_id = (isset($_GET['ref_id']))? (int) $_GET['ref_id'] : null;
                $this->checkAccessOrFail('create', $parent_id);

                $parent = ilObjectFactoryWrapper::singleton()->getInstanceByRefId($parent_id);
                $accordion = new ilAccordionGUI();

                $added_slides = 0;
                if($parent instanceof ilObjStudyProgramme) {
                        // only allow adding new StudyProgramme-Node if there are no lp-children
                        if(!$parent->hasLPChildren()) {
                                $content_new_node = $this->getCreationForm()->getHTML();
                                $accordion->addItem($this->lng->txt('prg_create_new_node'), $content_new_node);
                                $added_slides++;
                        }

                        // only allow adding new LP-Children if there are no other StudyProgrammes
                        if(!$parent->hasChildren()) {
                                $content_new_leaf = $this->tpl->getMessageHTML($this->lng->txt('prg_please_select_a_course_for_creating_a_leaf'));
                                $content_new_leaf .= $this->getContainerSelectionExplorer();

                                $accordion->addItem($this->lng->txt('prg_create_new_leaf'), $content_new_leaf);
                                $added_slides++;
                        }

                        if($added_slides == 1) {
                                $accordion->setBehaviour(ilAccordionGUI::FIRST_OPEN);
                        }

                        $content = $accordion->getHTML();
                }

                // creating modal window output
                $this->async_output_handler->setHeading($this->lng->txt("prg_async_".$this->ctrl->getCmd()));
                $this->async_output_handler->setContent($content);
                $this->async_output_handler->terminate();
        }


        protected function delete() {
                global $ilSetting;

                $this->checkAccessOrFail("delete");

                if(!isset($_GET['ref_id'], $_GET['item_ref_id'])) {
                        throw new ilException("Nothing to delete!");
                }

                $element_ref_id = (int) $_GET['ref_id'];

                $cgui = new ilConfirmationGUI();

                $msg = $this->lng->txt("info_delete_sure");

                if (!$ilSetting->get('enable_trash'))
                {
                        $msg .= "<br/>".$this->lng->txt("info_delete_warning_no_trash");
                }
                $cgui->setFormAction($this->ctrl->getFormAction($this, 'confirmedDelete', '', true));
                $cgui->setCancel($this->lng->txt("cancel"), "cancelDelete");
                $cgui->setConfirm($this->lng->txt("confirm"), "confirmedDelete");
                $cgui->setFormName('async_form');

                $obj_id = ilObject::_lookupObjectId($element_ref_id);
                $type = ilObject::_lookupType($obj_id);
                $title = call_user_func(array(ilObjectFactory::getClassByType($type),'_lookupTitle'),$obj_id);
                $alt = $this->lng->txt("icon")." ".$this->lng->txt("obj_".$type);

                $cgui->addItem("id[]", $element_ref_id, $title,
                        ilObject::_getIcon($obj_id, "small", $type),
                        $alt);
                $cgui->addHiddenItem('item_ref_id', $_GET['item_ref_id']);

                $content = $cgui->getHTML();

                // creating the modal window output
                $this->async_output_handler->setHeading($msg);
                $this->async_output_handler->setContent($content);
                $this->async_output_handler->terminate();
        }


        protected function confirmedDelete() {
                $this->checkAccessOrFail("delete");

                if(!isset($_POST['id'], $_POST['item_ref_id']) && is_array($_POST['id'])) {
                        throw new ilException("No item select for deletion!");
                }

                $ids = $_POST['id'];
                $current_node = (int) $_POST['item_ref_id'];
                $result = true;

                foreach($ids as $id) {
                        $obj = ilObjectFactoryWrapper::getInstanceByRefId($id);

                        $not_parent_of_current = true;
                        $not_root = true;

                        // do some additional validation if it is a StudyProgramme
                        if($obj instanceof ilObjStudyProgramme) {

                                //check if you are not deleting a parent element of the current element
                                $children_of_node = ilObjStudyProgramme::getAllChildren($obj->getRefId());
                                $get_ref_ids = function ($obj) { return $obj->getRefId(); };

                                $children_ref_ids = array_map($get_ref_ids, $children_of_node);
                                $not_parent_of_current = (!in_array($current_node, $children_ref_ids));

                                $not_root = ($obj->getRoot() != null);
                        }

                        if($current_node != $id && $not_root && $not_parent_of_current && $this->checkAccess('delete', $obj->getRefId())) {

                                ilRepUtil::deleteObjects(null, $id);

                                // deletes the tree-open-node-session storage
                                if(isset($children_of_node)) {
                                        $this->tree->closeCertainNode($id);
                                        foreach($children_of_node as $child) {
                                                $this->tree->closeCertainNode($child->getRefId());
                                        }
                                }

                                $msg = $this->lng->txt("prg_deleted_safely");

                        } else {
                                $msg = $this->lng->txt("prg_not_allowed_node_to_delete");
                                $result = false;
                        }
                }

                return ilAsyncOutputHandler::encodeAsyncResponse(array('success'=>$result, 'message'=>$msg));
        }


        protected function cancelDelete() {
                return ilAsyncOutputHandler::encodeAsyncResponse();
        }


        protected function initAsyncUIElements() {
                // add  js files
                ilAccordionGUI::addJavaScript();
                ilAsyncPropertyFormGUI::addJavaScript(true);
                ilAsyncContainerSelectionExplorer::addJavascript();

                // add bootstrap modal
                $settings_modal = ilModalGUI::getInstance();
                $settings_modal->setId($this->modal_id);
                $settings_modal->setType(ilModalGUI::TYPE_LARGE);
                $this->tpl->addOnLoadCode('$("#'.$this->modal_id.'").study_programme_modal();');

                $content =  $settings_modal->getHTML();

                // init js notifications
                $notifications = new ilAsyncNotifications();
                $notifications->addJsConfig('events', array('success'=>array('study_programme-show_success')));
                $notifications->initJs();

                // init tree selection explorer
                $async_explorer = new ilAsyncContainerSelectionExplorer(rawurldecode($this->ctrl->getLinkTarget($this, 'createNewLeaf', '', true, false)));
                $async_explorer->initJs();

                return $content;
        }


        protected function getToolbar() {
                $save_order_btn = ilLinkButton::getInstance();
                $save_order_btn->setId('save_order_button');
                $save_order_btn->setUrl("javascript:void(0);");
                $save_order_btn->setOnClick("$('body').trigger('study_programme-save_order');");
                $save_order_btn->setCaption('prg_save_tree_order');

                $cancel_order_btn = ilLinkButton::getInstance();
                $cancel_order_btn->setId('cancel_order_button');
                $cancel_order_btn->setUrl("javascript:void(0);");
                $cancel_order_btn->setOnClick("$('body').trigger('study_programme-cancel_order');");
                $cancel_order_btn->setCaption('prg_cancel_tree_order');

                $this->toolbar->addButtonInstance($save_order_btn);
                $this->toolbar->addButtonInstance($cancel_order_btn);
        }


        protected function checkAccess($permission, $ref_id = null) {
                $ref_id = ($ref_id === null)? $this->ref_id : $ref_id;
                $checker = $this->access->checkAccess($permission, '', $ref_id);

                return $checker;
        }


        protected function checkAccessOrFail($permission, $ref_id = null) {
                if(!$this->checkAccess($permission, $ref_id)) {
                        throw new ilException("You have no permission for ".$permission." Object with ref_id ".$ref_id."!");
                }
        }

}