survey/classes/class.SurveyQuestionGUI.php

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<?php
 /*
   +----------------------------------------------------------------------------+
   | ILIAS open source                                                          |
   +----------------------------------------------------------------------------+
   | Copyright (c) 1998-2001 ILIAS open source, University of Cologne           |
   |                                                                            |
   | This program is free software; you can redistribute it and/or              |
   | modify it under the terms of the GNU General Public License                |
   | as published by the Free Software Foundation; either version 2             |
   | of the License, or (at your option) any later version.                     |
   |                                                                            |
   | This program is distributed in the hope that it will be useful,            |
   | but WITHOUT ANY WARRANTY; without even the implied warranty of             |
   | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              |
   | GNU General Public License for more details.                               |
   |                                                                            |
   | You should have received a copy of the GNU General Public License          |
   | along with this program; if not, write to the Free Software                |
   | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
   +----------------------------------------------------------------------------+
*/

require_once "./survey/classes/class.SurveyNominalQuestionGUI.php";
require_once "./survey/classes/class.SurveyTextQuestionGUI.php";
require_once "./survey/classes/class.SurveyMetricQuestionGUI.php";
require_once "./survey/classes/class.SurveyOrdinalQuestionGUI.php";

class SurveyQuestionGUI {
  var $object;
        var $tpl;
        var $lng;
  function SurveyQuestionGUI()

  {
                global $lng, $tpl, $ilCtrl;

    $this->lng =& $lng;
    $this->tpl =& $tpl;
                $this->ctrl =& $ilCtrl;
                $this->ctrl->saveParameter($this, "q_id");
        }

        function &executeCommand()
        {
                $cmd = $this->ctrl->getCmd();
                $next_class = $this->ctrl->getNextClass($this);

                $cmd = $this->getCommand($cmd);
                switch($next_class)
                {
                        default:
                                $ret =& $this->$cmd();
                                break;
                }
                return $ret;
        }

        function getCommand($cmd)
        {
                return $cmd;
        }

        function &_getQuestionGUI($questiontype, $question_id = -1)
        {
                if (!$questiontype)
                {
                        $questiontype = SurveyQuestion::_getQuestiontype($question_id);
                }
                switch ($questiontype)
                {
                        case "qt_nominal":
                                $question = new SurveyNominalQuestionGUI();
                                break;
                        case "qt_ordinal":
                                $question = new SurveyOrdinalQuestionGUI();
                                break;
                        case "qt_metric":
                                $question = new SurveyMetricQuestionGUI();
                                break;
                        case "qt_text":
                                $question = new SurveyTextQuestionGUI();
                                break;
                }
                if ($question_id > 0)
                {
                        $question->object->loadFromDb($question_id);
                }

                return $question;
        }
        
        function _getGUIClassNameForId($a_q_id)
        {
                $q_type = SurveyQuestion::_getQuestiontype($a_q_id);
                $class_name = SurveyQuestionGUI::_getClassNameForQType($q_type);
                return $class_name;
        }

        function _getClassNameForQType($q_type)
        {
                switch ($q_type)
                {
                        case "qt_nominal":
                                return "SurveyNominalQuestionGUI";
                                break;

                        case "qt_ordinal":
                                return "SurveyOrdinalQuestionGUI";
                                break;

                        case "qt_metric":
                                return "SurveyMetricQuestionGUI";
                                break;

                        case "qt_text":
                                return "SurveyTextQuestionGUI";
                                break;
                }
        }
        
        function originalSyncForm()
        {
//              $this->tpl->setVariable("HEADER", $this->object->getTitle());
                $this->tpl->addBlockFile("ADM_CONTENT", "adm_content", "tpl.il_svy_qpl_sync_original.html", true);
                $this->tpl->setCurrentBlock("adm_content");
                $this->tpl->setVariable("BUTTON_YES", $this->lng->txt("yes"));
                $this->tpl->setVariable("BUTTON_NO", $this->lng->txt("no"));
                $this->tpl->setVariable("FORM_ACTION", $this->ctrl->getFormAction($this));
                $this->tpl->setVariable("TEXT_SYNC", $this->lng->txt("confirm_sync_questions"));
                $this->tpl->parseCurrentBlock();
        }
        
        function sync()
        {
                $original_id = $this->object->original_id;
                if ($original_id)
                {
                        $this->object->syncWithOriginal();
                }
                $_GET["ref_id"] = $_GET["calling_survey"];
                ilUtil::redirect("survey.php?ref_id=" . $_GET["calling_survey"] . "&cmd=questions");
        }

        function cancelSync()
        {
                $_GET["ref_id"] = $_GET["calling_survey"];
                ilUtil::redirect("survey.php?ref_id=" . $_GET["calling_survey"] . "&cmd=questions");
        }
                
        function save()
        {
                global $ilUser;
                $old_id = $_GET["q_id"];
                $result = $this->writePostData();
                if ($result == 0)
                {
                        $this->object->saveToDb();
                        $originalexists = $this->object->_questionExists($this->object->original_id);
                        $_GET["q_id"] = $this->object->getId();
                        if ($_GET["calling_survey"] && $originalexists && SurveyQuestion::_isWriteable($this->object->original_id, $ilUser->getId()))
                        {
                                $this->originalSyncForm();
                                return;
                        }
                        elseif ($_GET["calling_survey"])
                        {
                                $_GET["ref_id"] = $_GET["calling_survey"];
                                ilUtil::redirect("survey.php?ref_id=" . $_GET["calling_survey"] . "&cmd=questions");
                                return;
                        }
                        else
                        {
                                sendInfo($this->lng->txt("msg_obj_modified"), true);
                                $this->ctrl->setParameterByClass($_GET["cmdClass"], "q_id", $this->object->getId());
                                $this->ctrl->setParameterByClass($_GET["cmdClass"], "sel_question_types", $_GET["sel_question_types"]);
                                $this->ctrl->setParameterByClass($_GET["cmdClass"], "new_for_survey", $_GET["new_for_survey"]);
                                $this->ctrl->redirectByClass($_GET["cmdClass"], "editQuestion");
                        }
                }
                else
                {
      sendInfo($this->lng->txt("fill_out_all_required_fields"));
                }
                $this->editQuestion();
        }
        
        function deleteCategory()
        {
                $result = $this->writePostData();
                if ($result == 0)
                {
                        $delete_categories = array();
                        foreach ($_POST as $key => $value) {
                                if (preg_match("/chb_category_(\d+)/", $key, $matches)) {
                                        array_push($delete_categories, $matches[1]);
                                }
                        }
                        if (count($delete_categories))
                        {
                                sendInfo($this->lng->txt("category_delete_confirm"));
                                $this->tpl->addBlockFile("ADM_CONTENT", "adm_content", "tpl.il_svy_confirm_remove_categories.html", true);
                                $rowclass = array("tblrow1", "tblrow2");
                                $counter = 0;
                                foreach ($_POST as $key => $value) {
                                        if (preg_match("/chb_category_(\d+)/", $key, $matches)) {
                                                $this->tpl->setCurrentBlock("row");
                                                $this->tpl->setVariable("TXT_TITLE", $_POST["category_$matches[1]"]);
                                                $this->tpl->setVariable("COLOR_CLASS", $rowclass[$counter % 2]);
                                                $this->tpl->parseCurrentBlock();
                                                $this->tpl->setCurrentBlock("hidden");
                                                $this->tpl->setVariable("HIDDEN_NAME", $key);
                                                $this->tpl->setVariable("HIDDEN_VALUE", $value);
                                                $this->tpl->parseCurrentBlock();
                                                $counter++;
                                        }
                                }
                
                                // set the id to return to the selected question
                                $this->tpl->setCurrentBlock("hidden");
                                $this->tpl->setVariable("HIDDEN_NAME", "id");
                                $this->tpl->setVariable("HIDDEN_VALUE", $_POST["id"]);
                                $this->tpl->parseCurrentBlock();
                                
                                $this->tpl->setCurrentBlock("adm_content");
                                $this->tpl->setVariable("TXT_TITLE", $this->lng->txt("category"));
                                $this->tpl->setVariable("BTN_CANCEL",$this->lng->txt("cancel"));
                                $this->tpl->setVariable("BTN_CONFIRM",$this->lng->txt("confirm"));
                                $this->tpl->setVariable("FORM_ACTION", $this->ctrl->getFormAction($this));
                                $this->tpl->parseCurrentBlock();
                        }
                        else
                        {
                                sendInfo($this->lng->txt("category_delete_select_none"));
                                $this->editQuestion();
                        }
                }
                else
                {
                        // You cannot add answers before you enter the required data
                        sendInfo($this->lng->txt("fill_out_all_required_fields_delete_category"));
                        $this->editQuestion();
                }
        }
        
        function confirmDeleteCategory() {
                $delete_categories = array();
                foreach ($_POST as $key => $value) {
                        if (preg_match("/chb_category_(\d+)/", $key, $matches)) {
                                array_push($delete_categories, $matches[1]);
                        }
                }
                if (count($delete_categories))
                {
                        $this->object->removeCategories($delete_categories);
                }
                $this->object->saveToDb();
                $this->ctrl->redirect($this, "editQuestion");
        }

        function moveCategory()
        {
                $result = $this->writePostData();
                if ($result == 0)
                {
                        $checked_move = 0;
                        foreach ($_POST as $key => $value) 
                        {
                                if (preg_match("/chb_category_(\d+)/", $key, $matches))
                                {
                                        $checked_move++;
                                        $this->tpl->setCurrentBlock("move");
                                        $this->tpl->setVariable("MOVE_COUNTER", $matches[1]);
                                        $this->tpl->setVariable("MOVE_VALUE", $matches[1]);
                                        $this->tpl->parseCurrentBlock();
                                }
                        }
                        if ($checked_move)
                        {
                                $this->tpl->setCurrentBlock("move_buttons");
                                $this->tpl->setVariable("INSERT_BEFORE", $this->lng->txt("insert_before"));
                                $this->tpl->setVariable("INSERT_AFTER", $this->lng->txt("insert_after"));
                                $this->tpl->parseCurrentBlock();
                                sendInfo($this->lng->txt("select_target_position_for_move"));
                        }
                        else
                        {
                                sendInfo($this->lng->txt("no_category_selected_for_move"));
                        }
                }
                else
                {
                        // You cannot add answers before you enter the required data
                        sendInfo($this->lng->txt("fill_out_all_required_fields_move_category"));
                }
                $this->editQuestion();
        }
        
        function addCategory()
        {
                $result = $this->writePostData();
                if ($result == 0)
                {
                        // Check for blank fields before a new category field is inserted
                        foreach ($_POST as $key => $value) {
                                if (preg_match("/category_(\d+)/", $key, $matches)) {
                                        if (!$value) {
                                                $_POST["cmd"]["addCategory"] = "";
                                                sendInfo($this->lng->txt("fill_out_all_category_fields"));
                                        }
                                }
                        }
                }
                else
                {
                        sendInfo($this->lng->txt("fill_out_all_required_fields_add_category"));
                        $_POST["cmd"]["addCategory"] = "";
                }
                $this->editQuestion();
        }
        
        function insertBeforeCategory()
        {
                $result = $this->writePostData();
                $array1 = array();
                $array2 = array();
        
                // Move selected categories
                $move_categories = array();
                $selected_category = -1;
                foreach ($_POST as $key => $value)
                {
                        if (preg_match("/^move_(\d+)$/", $key, $matches))
                        {
                                array_push($move_categories, $value);
                                array_push($array2, ilUtil::stripSlashes($_POST["category_$value"]));
                        }
                        if (preg_match("/^chb_category_(\d+)/", $key, $matches))
                        {
                                if ($selected_category < 0)
                                {
                                        // take onley the first checked category (if more categories are checked)
                                        $selected_category = $matches[1];
                                }
                        }
                }

    // Add all categories from the form into the object
                foreach ($_POST as $key => $value) {
                        if (preg_match("/^category_(\d+)/", $key, $matches)) {
                                if (!in_array($matches[1], $move_categories) or ($selected_category < 0))
                                {
                                        array_push($array1, ilUtil::stripSlashes($value));
                                }
                        }
                }

                if ($selected_category >= 0)
                {
                        // Delete all existing categories and create new categories from the form data
                        $this->object->flushCategories();
                        $array_pos = array_search($_POST["category_$selected_category"], $array1);
                        $part1 = array_slice($array1, 0, $array_pos);
                        $part2 = array_slice($array1, $array_pos);
                        $array1 = array_merge($part1, $array2, $part2);
                        $this->object->addCategoryArray($array1);
                        $this->object->saveToDb();
                }
                $this->editQuestion();
        }
        
        function insertAfterCategory()
        {
                $result = $this->writePostData();
                $array1 = array();
                $array2 = array();
        
                // Move selected categories
                $move_categories = array();
                $selected_category = -1;
                foreach ($_POST as $key => $value)
                {
                        if (preg_match("/^move_(\d+)$/", $key, $matches))
                        {
                                array_push($move_categories, $value);
                                array_push($array2, ilUtil::stripSlashes($_POST["category_$value"]));
                        }
                        if (preg_match("/^chb_category_(\d+)/", $key, $matches))
                        {
                                if ($selected_category < 0)
                                {
                                        // take onley the first checked category (if more categories are checked)
                                        $selected_category = $matches[1];
                                }
                        }
                }

    // Add all categories from the form into the object
                foreach ($_POST as $key => $value) {
                        if (preg_match("/^category_(\d+)/", $key, $matches)) {
                                if (!in_array($matches[1], $move_categories) or ($selected_category < 0))
                                {
                                        array_push($array1, ilUtil::stripSlashes($value));
                                }
                        }
                }

                if ($selected_category >= 0)
                {
                        // Delete all existing categories and create new categories from the form data
                        $this->object->flushCategories();
                        $array_pos = array_search($_POST["category_$selected_category"], $array1);
                        $part1 = array_slice($array1, 0, $array_pos + 1);
                        $part2 = array_slice($array1, $array_pos + 1);
                        $array1 = array_merge($part1, $array2, $part2);
                        $this->object->addCategoryArray($array1);
                        $this->object->saveToDb();
                }
                $this->editQuestion();
        }
        
        function cancel()
        {
                if ($_GET["calling_survey"])
                {
                        $_GET["ref_id"] = $_GET["calling_survey"];
                        ilUtil::redirect("survey.php?cmd=questions&ref_id=".$_GET["calling_survey"]);
                }
                elseif ($_GET["new_for_survey"])
                {
                        $_GET["ref_id"] = $_GET["new_for_survey"];
                        ilUtil::redirect("survey.php?cmd=questions&ref_id=".$_GET["new_for_survey"]);
                }
                else
                {
                        $this->ctrl->redirectByClass("ilobjsurveyquestionpoolgui", "questions");
                }
        }

  function addPhrase($hasError = false) 
        {
                if (!$hasError)
                {
                        $result = $this->writePostData();
                        if ($result > 0)
                        {
                                sendInfo($this->lng->txt("fill_out_all_required_fields"));
                                $this->editQuestion();
                                return;
                        }
                        $this->object->saveToDb();
                        $this->ctrl->setParameterByClass(get_class($this), "q_id", $this->object->getId());
                        $this->ctrl->setParameterByClass("ilobjsurveyquestionpoolgui", "q_id", $this->object->getId());
                }
                $this->tpl->addBlockFile("ADM_CONTENT", "adm_content", "tpl.il_svy_qpl_addphrase.html", true);

                // set the id to return to the selected question
                $this->tpl->setCurrentBlock("hidden");
                $this->tpl->setVariable("HIDDEN_NAME", "id");
                $this->tpl->setVariable("HIDDEN_VALUE", $this->object->getId());
                $this->tpl->parseCurrentBlock();

                $phrases =& $this->object->getAvailablePhrases();
                $colors = array("tblrow1", "tblrow2");
                $counter = 0;
                foreach ($phrases as $phrase_id => $phrase_array)
                {
                        $this->tpl->setCurrentBlock("phraserow");
                        $this->tpl->setVariable("COLOR_CLASS", $colors[$counter++ % 2]);
                        $this->tpl->setVariable("PHRASE_VALUE", $phrase_id);
                        $this->tpl->setVariable("PHRASE_NAME", $phrase_array["title"]);
                        $categories =& $this->object->getCategoriesForPhrase($phrase_id);
                        $this->tpl->setVariable("PHRASE_CONTENT", join($categories, ","));
                        $this->tpl->parseCurrentBlock();
                }
                
                $this->tpl->setCurrentBlock("adm_content");
                $this->tpl->setVariable("TEXT_CANCEL", $this->lng->txt("cancel"));
                $this->tpl->setVariable("TEXT_PHRASE", $this->lng->txt("phrase"));
                $this->tpl->setVariable("TEXT_CONTENT", $this->lng->txt("categories"));
                $this->tpl->setVariable("TEXT_ADD_PHRASE", $this->lng->txt("add_phrase"));
                $this->tpl->setVariable("TEXT_INTRODUCTION",$this->lng->txt("add_phrase_introduction"));
                $this->tpl->setVariable("FORM_ACTION", $this->ctrl->getFormAction($this));
                $this->tpl->parseCurrentBlock();
        }
        
        function cancelViewPhrase() {
                $this->ctrl->redirect($this, "editQuestion");
        }

        function cancelDeleteCategory() {
                $this->ctrl->redirect($this, "editQuestion");
        }

        function addSelectedPhrase() {
                if (strcmp($_POST["phrases"], "") == 0)
                {
                        sendInfo($this->lng->txt("select_phrase_to_add"));
                        $this->addPhrase(true);
                }
                else
                {
                        if (strcmp($this->object->getPhrase($_POST["phrases"]), "dp_standard_numbers") != 0)
                        {
                                $this->object->addPhrase($_POST["phrases"]);
                        }
                        else
                        {
                                $this->addStandardNumbers();
                                return;
                        }
                        $this->editQuestion();
                }
        }

  function addStandardNumbers() 
        {
                $this->tpl->addBlockFile("ADM_CONTENT", "adm_content", "tpl.il_svy_qpl_addphrase_standard_numbers.html", true);

                // set the id to return to the selected question
                $this->tpl->setCurrentBlock("hidden");
                $this->tpl->setVariable("HIDDEN_NAME", "id");
                $this->tpl->setVariable("HIDDEN_VALUE", $this->object->getId());
                $this->tpl->parseCurrentBlock();

                $this->tpl->setCurrentBlock("adm_content");
                $this->tpl->setVariable("TEXT_ADD_LIMITS", $this->lng->txt("add_limits_for_standard_numbers"));
                $this->tpl->setVariable("TEXT_LOWER_LIMIT",$this->lng->txt("lower_limit"));
                $this->tpl->setVariable("TEXT_UPPER_LIMIT",$this->lng->txt("upper_limit"));
                $this->tpl->setVariable("VALUE_LOWER_LIMIT", $_POST["lower_limit"]);
                $this->tpl->setVariable("VALUE_UPPER_LIMIT", $_POST["upper_limit"]);
                $this->tpl->setVariable("BTN_ADD",$this->lng->txt("add_phrase"));
                $this->tpl->setVariable("BTN_CANCEL",$this->lng->txt("cancel"));
                $this->tpl->setVariable("FORM_ACTION", $this->ctrl->getFormAction($this));
                $this->tpl->parseCurrentBlock();
        }
        
        function cancelStandardNumbers() {
                $this->ctrl->redirect($this, "editQuestion");
        }

        function insertStandardNumbers() {
                if ((strcmp($_POST["lower_limit"], "") == 0) or (strcmp($_POST["upper_limit"], "") == 0))
                {
                        sendInfo($this->lng->txt("missing_upper_or_lower_limit"));
                        $this->addStandardNumbers();
                }
                else if ((int)$_POST["upper_limit"] <= (int)$_POST["lower_limit"])
                {
                        sendInfo($this->lng->txt("upper_limit_must_be_greater"));
                        $this->addStandardNumbers();
                }
                else
                {
                        $this->object->addStandardNumbers($_POST["lower_limit"], $_POST["upper_limit"]);
                        $this->editQuestion();
                }
        }

  function savePhrase($hasError = false) 
        {
                if (!$hasError)
                {
                        $result = $this->writePostData();
                }
                else
                {
                        $result = 0;
                }

                $categories_checked = 0;
                foreach ($_POST as $key => $value) 
                {
                        if (preg_match("/chb_category_(\d+)/", $key, $matches)) 
                        {
                                $categories_checked++;
                        }
                }

                if ($categories_checked == 0)
                {
                        sendInfo($this->lng->txt("check_category_to_save_phrase"));
                        $this->editQuestion();
                        return;
                }
                
                if ($result == 0)
                {
                        $this->tpl->addBlockFile("ADM_CONTENT", "adm_content", "tpl.il_svy_qpl_savephrase.html", true);
                        $rowclass = array("tblrow1", "tblrow2");
                        $counter = 0;
                        foreach ($_POST as $key => $value) {
                                if (preg_match("/chb_category_(\d+)/", $key, $matches)) {
                                        $this->tpl->setCurrentBlock("row");
                                        $this->tpl->setVariable("TXT_TITLE", $_POST["category_$matches[1]"]);
                                        $this->tpl->setVariable("COLOR_CLASS", $rowclass[$counter % 2]);
                                        $this->tpl->parseCurrentBlock();
                                        $this->tpl->setCurrentBlock("hidden");
                                        $this->tpl->setVariable("HIDDEN_NAME", $key);
                                        $this->tpl->setVariable("HIDDEN_VALUE", $value);
                                        $this->tpl->parseCurrentBlock();
                                        $this->tpl->setCurrentBlock("hidden");
                                        $this->tpl->setVariable("HIDDEN_NAME", "category_$matches[1]");
                                        $this->tpl->setVariable("HIDDEN_VALUE", $_POST["category_$matches[1]"]);
                                        $this->tpl->parseCurrentBlock();
                                        $counter++;
                                }
                        }
        
                        // set the id to return to the selected question
                        $this->tpl->setCurrentBlock("hidden");
                        $this->tpl->setVariable("HIDDEN_NAME", "id");
                        $this->tpl->setVariable("HIDDEN_VALUE", $_POST["id"]);
                        $this->tpl->parseCurrentBlock();
                        
                        $this->tpl->setCurrentBlock("adm_content");
                        $this->tpl->setVariable("SAVE_PHRASE_INTRODUCTION", $this->lng->txt("save_phrase_introduction"));
                        $this->tpl->setVariable("TEXT_PHRASE_TITLE", $this->lng->txt("enter_phrase_title"));
                        $this->tpl->setVariable("TXT_TITLE", $this->lng->txt("category"));
                        $this->tpl->setVariable("VALUE_PHRASE_TITLE", $_POST["phrase_title"]);
                        $this->tpl->setVariable("BTN_CANCEL",$this->lng->txt("cancel"));
                        $this->tpl->setVariable("BTN_CONFIRM",$this->lng->txt("confirm"));
                        $this->tpl->setVariable("FORM_ACTION", $this->ctrl->getFormAction($this));
                        $this->tpl->parseCurrentBlock();
                }
                else
                {
                        sendInfo($this->lng->txt("fill_out_all_required_fields_save_phrase"));
                }
        }

        function cancelSavePhrase() {
                $this->ctrl->redirect($this, "editQuestion");
        }

        function confirmSavePhrase() {
                if (!$_POST["phrase_title"])
                {
                        sendInfo($this->lng->txt("qpl_savephrase_empty"));
                        $this->savePhrase(true);
                        return;
                }
                if ($this->object->phraseExists($_POST["phrase_title"]))
                {
                        sendInfo($this->lng->txt("qpl_savephrase_exists"));
                        $this->savePhrase(true);
                        return;
                }

                $save_categories = array();
                foreach ($_POST as $key => $value) {
                        if (preg_match("/chb_category_(\d+)/", $key, $matches)) {
                                array_push($save_categories, $matches[1]);
                        }
                }
                if (count($save_categories))
                {
                        $this->object->savePhrase($save_categories, $_POST["phrase_title"]);
                        sendInfo($this->lng->txt("phrase_saved"));
                }
                $this->editQuestion();
        }

        function setQuestionTabsForClass($guiclass)
        {
                global $rbacsystem;

                include_once "./classes/class.ilTabsGUI.php";
                $tabs_gui =& new ilTabsGUI();
                
                $this->ctrl->setParameterByClass("$guiclass", "sel_question_types", $this->getQuestionType());
                $this->ctrl->setParameterByClass("$guiclass", "q_id", $_GET["q_id"]);

                if ($rbacsystem->checkAccess('edit', $_GET["ref_id"])) {
                        $tabs_gui->addTarget("properties",
                                $this->ctrl->getLinkTargetByClass("$guiclass", "editQuestion"), "editQuestion",
                                "$guiclass");
                }
                
                if ($_GET["q_id"])
                {
                        $tabs_gui->addTarget("preview",
                        $this->ctrl->getLinkTargetByClass("$guiclass", "preview"), "preview",
                        "$guiclass");
                }

                if ($_GET["calling_survey"])
                {
                        $tabs_gui->addTarget("menubacktosurvey",
                                "survey.php?cmd=questions&ref_id=".$_GET["calling_survey"], "questions",
                                "ilObjSurveyQuestionPoolGUI");
                }
                elseif ($_GET["new_for_survey"])
                {
                        $tabs_gui->addTarget("menubacktosurvey",
                                "survey.php?cmd=questions&new_id=".$this->object->getId() . "&ref_id=".$_GET["new_for_survey"], "questions",
                                "ilObjSurveyQuestionPoolGUI");
                }
                else
                {               
                        $tabs_gui->addTarget("menuback",
                                $this->ctrl->getLinkTargetByClass("ilobjsurveyquestionpoolgui", "questions"), "questions",
                                "ilObjSurveyQuestionPoolGUI");
                }
                
                $this->tpl->setVariable("TABS", $tabs_gui->getHTML());

    if ($this->object->getId() > 0) {
      $title = $this->lng->txt("edit") . " &quot;" . $this->object->getTitle() . "&quot";
    } else {
      $title = $this->lng->txt("create_new") . " " . $this->lng->txt($this->getQuestionType());
    }
                $this->tpl->setVariable("HEADER", $title);
//              echo "<br>end setQuestionTabs<br>";
        }

        function addMaterial()
        {
                global $tree;

                require_once("./survey/classes/class.ilMaterialExplorer.php");
                switch ($_POST["internalLinkType"])
                {
                        case "lm":
                                $_SESSION["link_new_type"] = "lm";
                                $_SESSION["search_link_type"] = "lm";
                                break;
                        case "glo":
                                $_SESSION["link_new_type"] = "glo";
                                $_SESSION["search_link_type"] = "glo";
                                break;
                        case "st":
                                $_SESSION["link_new_type"] = "lm";
                                $_SESSION["search_link_type"] = "st";
                                break;
                        case "pg":
                                $_SESSION["link_new_type"] = "lm";
                                $_SESSION["search_link_type"] = "pg";
                                break;
                        default:
                                if (!$_SESSION["link_new_type"])
                                {
                                        $_SESSION["link_new_type"] = "lm";
                                }
                                break;
                }

                sendInfo($this->lng->txt("select_object_to_link"));
                
                $exp = new ilMaterialExplorer($this->ctrl->getLinkTarget($this,'addMaterial'), get_class($this));

                $exp->setExpand($_GET["expand"] ? $_GET["expand"] : $tree->readRootId());
                $exp->setExpandTarget($this->ctrl->getLinkTarget($this,'addMaterial'));
                $exp->setTargetGet("ref_id");
                $exp->setRefId($this->cur_ref_id);
                $exp->addFilter($_SESSION["link_new_type"]);
                $exp->setSelectableType($_SESSION["link_new_type"]);

                // build html-output
                $exp->setOutput(0);

                $this->tpl->addBlockFile("ADM_CONTENT", "explorer", "tpl.il_svy_qpl_explorer.html", true);
                $this->tpl->setVariable("EXPLORER_TREE",$exp->getOutput());
                $this->tpl->setVariable("BUTTON_CANCEL",$this->lng->txt("cancel"));
                $this->tpl->setVariable("FORMACTION",$this->ctrl->getFormAction($this));
                $this->tpl->parseCurrentBlock();
        }
        
        function removeMaterial()
        {
                $this->object->material = array();
                $this->object->saveToDb();
                $this->editQuestion();
        }
        
        function cancelExplorer()
        {
                unset($_SESSION["link_new_type"]);
                $this->editQuestion();
        }
                
        function addPG()
        {
                $this->object->setMaterial("il__pg_" . $_GET["pg"]);
                unset($_SESSION["link_new_type"]);
                unset($_SESSION["search_link_type"]);
                sendInfo($this->lng->txt("material_added_successfully"));
                $this->editQuestion();
        }
        
        function addST()
        {
                $this->object->setMaterial("il__st_" . $_GET["st"]);
                unset($_SESSION["link_new_type"]);
                unset($_SESSION["search_link_type"]);
                sendInfo($this->lng->txt("material_added_successfully"));
                $this->editQuestion();
        }

        function addGIT()
        {
                $this->object->setMaterial("il__git_" . $_GET["git"]);
                unset($_SESSION["link_new_type"]);
                unset($_SESSION["search_link_type"]);
                sendInfo($this->lng->txt("material_added_successfully"));
                $this->editQuestion();
        }
        
        function linkChilds()
        {
                switch ($_SESSION["search_link_type"])
                {
                        case "pg":
                        case "st":
                                $_GET["q_id"] = $this->object->getId();
                                $color_class = array("tblrow1", "tblrow2");
                                $counter = 0;
                                require_once("./content/classes/class.ilObjContentObject.php");
                                $cont_obj =& new ilObjContentObject($_GET["source_id"], true);
                                // get all chapters
                                $ctree =& $cont_obj->getLMTree();
                                $nodes = $ctree->getSubtree($ctree->getNodeData($ctree->getRootId()));
                                $this->tpl->addBlockFile("ADM_CONTENT", "link_selection", "tpl.il_svy_qpl_internallink_selection.html", true);
                                foreach($nodes as $node)
                                {
                                        if($node["type"] == $_SESSION["search_link_type"])
                                        {
                                                $this->tpl->setCurrentBlock("linktable_row");
                                                $this->tpl->setVariable("TEXT_LINK", $node["title"]);
                                                $this->tpl->setVariable("TEXT_ADD", $this->lng->txt("add"));
                                                $this->tpl->setVariable("LINK_HREF", $this->ctrl->getLinkTargetByClass(get_class($this), "add" . strtoupper($node["type"])) . "&" . $node["type"] . "=" . $node["obj_id"]);
                                                $this->tpl->setVariable("COLOR_CLASS", $color_class[$counter % 2]);
                                                $this->tpl->parseCurrentBlock();
                                                $counter++;
                                        }
                                }
                                $this->tpl->setCurrentBlock("link_selection");
                                $this->tpl->setVariable("BUTTON_CANCEL",$this->lng->txt("cancel"));
                                $this->tpl->setVariable("TEXT_LINK_TYPE", $this->lng->txt("obj_" . $_SESSION["search_link_type"]));
                                $this->tpl->setVariable("FORMACTION",$this->ctrl->getFormAction($this));
                                $this->tpl->parseCurrentBlock();
                                break;
                        case "glo":
                                $_GET["q_id"] = $this->object->getId();
                                $color_class = array("tblrow1", "tblrow2");
                                $counter = 0;
                                $this->tpl->addBlockFile("ADM_CONTENT", "link_selection", "tpl.il_svy_qpl_internallink_selection.html", true);
                                require_once "./content/classes/class.ilObjGlossary.php";
                                $glossary =& new ilObjGlossary($_GET["source_id"], true);
                                // get all glossary items
                                $terms = $glossary->getTermList();
                                foreach($terms as $term)
                                {
                                        $this->tpl->setCurrentBlock("linktable_row");
                                        $this->tpl->setVariable("TEXT_LINK", $term["term"]);
                                        $this->tpl->setVariable("TEXT_ADD", $this->lng->txt("add"));
                                        $this->tpl->setVariable("LINK_HREF", $this->ctrl->getLinkTargetByClass(get_class($this), "addGIT") . "&git=" . $term["id"]);
                                        $this->tpl->setVariable("COLOR_CLASS", $color_class[$counter % 2]);
                                        $this->tpl->parseCurrentBlock();
                                        $counter++;
                                }
                                $this->tpl->setCurrentBlock("link_selection");
                                $this->tpl->setVariable("BUTTON_CANCEL",$this->lng->txt("cancel"));
                                $this->tpl->setVariable("TEXT_LINK_TYPE", $this->lng->txt("glossary_term"));
                                $this->tpl->setVariable("FORMACTION",$this->ctrl->getFormAction($this));
                                $this->tpl->parseCurrentBlock();
                                break;
                        case "lm":
                                $this->object->setMaterial("il__lm_" . $_GET["source_id"]);
                                unset($_SESSION["link_new_type"]);
                                unset($_SESSION["search_link_type"]);
                                sendInfo($this->lng->txt("material_added_successfully"));
                                $this->editQuestion();
                                break;
                }
        }
}
?>