content/classes/class.ilExerciseGUI.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 "include/inc.header.php";
require_once "content/classes/class.ilExercise.php";
require_once "assessment/classes/class.assQuestionGUI.php";
require_once "classes/class.ilObjectGUI.php";
require_once "assessment/classes/class.ilObjQuestionPool.php";
require_once "classes/class.ilMetaDataGUI.php";

class ilExerciseGUI extends assQuestionGUI {
        var $ilias;
        var $objExercise;
        
        function ilExerciseGUI ($lm_id = 0, $chapter_id = 0) {
                global $ilias;
                $this->ilias = $ilias;
                
                if ($lm_id != 0) {
                        // get the question list and show them
                        $objExercise = new ilExercise($lm_id, $chapter_id);
                        //$this->showList();
                        $this->previewQuestion(2);
                } else {
                        $this->raiseError("No Learning Module Id given, abort!", $this->ilias->error_obj->MESSAGE);
                }
        }

        function showList () {
                // developing
                
        }
        
        function previewQuestion($question_id) {
                // developing
                $question_gui =& new assQuestionGUI();
                $question =& $question_gui->create_question("", $question_id);
                $question_gui->out_preview();
        }
        
        function editQuestionForm($type, $question_id = 0) {
                // developing
        }
        
        
}

// read following codes to finish the ilExercise class
function exercise()
        {
                global $rbacsystem;
                $type = $_GET["sel_question_types"];
                if ($_GET["preview"]) 
                {
                        $this->out_preview_page($_GET["preview"]);
                        return;
                }
                if (($_GET["edit"]) or ($type)) 
                {
                        $this->set_question_form($type, $_GET["edit"]);
                        return;
                }
                if ($_POST["cmd"]["create"]) 
                {
                        $this->set_question_form($_POST["sel_question_types"]);
                        return;
                }
                $this->tpl->addBlockFile("ADM_CONTENT", "adm_content", "assessment/templates/default/tpl.qpl_questions.html", true);
                $this->tpl->addBlockFile("CREATE_QUESTION", "create_question", "assessment/templates/default/tpl.il_as_create_new_question.html", true);
                $this->tpl->addBlockFile("A_BUTTONS", "a_buttons", "assessment/templates/default/tpl.il_as_qpl_action_buttons.html", true);
                $this->tpl->addBlockFile("FILTER_QUESTION_MANAGER", "filter_questions", "assessment/templates/default/tpl.il_as_qpl_filter_questions.html", true);

                $add_parameter = $this->get_add_parameter();

                // create an array of all checked checkboxes
                $checked_questions = array();
                foreach ($_POST as $key => $value) 
                {
                        if (preg_match("/cb_(\d+)/", $key, $matches)) 
                        {
                                array_push($checked_questions, $matches[1]);
                        }
                }
    
                if (strlen($_POST["cmd"]["edit"]) > 0) 
                {
                        // edit button was pressed
                        if (count($checked_questions) > 1) 
                        {
                                sendInfo($this->lng->txt("qpl_edit_select_multiple"));
                        } 
                        elseif (count($checked_questions) == 0) 
                        {
                                sendInfo($this->lng->txt("qpl_edit_select_none"));
                        } 
                        else
                        {
                                if ($rbacsystem->checkAccess('edit', $this->ref_id)) 
                                {
                                        header("location:" . $_SERVER["PHP_SELF"] . $add_parameter . "&edit=" . $checked_questions[0]);
                                        exit();
                                } 
                                else
                                {
                                        sendInfo($this->lng->txt("qpl_edit_rbac_error"));
                                }
                        } 
                }
                if (strlen($_POST["cmd"]["delete"]) > 0)
                {
                        // delete button was pressed
                        if (count($checked_questions) > 0) 
                        {
                                if ($rbacsystem->checkAccess('edit', $this->ref_id))
                                {
                                        foreach ($checked_questions as $key => $value) 
                                        {
                                        $this->object->delete_question($value);
                                        }
                                } 
                                else 
                                {
                                        sendInfo($this->lng->txt("qpl_delete_rbac_error"));
                                }
                        } 
                        elseif (count($checked_questions) == 0) 
                        {
                                sendInfo($this->lng->txt("qpl_delete_select_none"));
                        }
                }
                if (strlen($_POST["cmd"]["duplicate"]) > 0) 
                {
                        // duplicate button was pressed
                        if (count($checked_questions) > 0) 
                        {
                                foreach ($checked_questions as $key => $value) 
                                {
                                        $question_gui =& new assQuestionGUI();
                                        $question =& $question_gui->create_question("", $value);
                                        $question_gui->question->duplicate();
                                }
                        }
                        elseif (count($checked_questions) == 0) 
                        {
                                sendInfo($this->lng->txt("qpl_duplicate_select_none"));
                        }
                }
    
                if (strlen($_POST["cmd"]["export"]) > 0) 
                {
                        // export button was pressed
                        if (count($checked_questions) > 0) 
                        {
                        // here comes the export routine call for qti export
                        } 
                        elseif (count($checked_questions) == 0) 
                        {
                                sendInfo($this->lng->txt("qpl_export_select_none"));
                        }
                }
                $filter_fields = array(
                        "title" => $this->lng->txt("title"),
                        "comment" => $this->lng->txt("description"),
                         "author" => $this->lng->txt("author"),
                );
                $this->tpl->setCurrentBlock("filterrow");
                foreach ($filter_fields as $key => $value) 
                {
                        $this->tpl->setVariable("VALUE_FILTER_TYPE", "$key");
                        $this->tpl->setVariable("NAME_FILTER_TYPE", "$value");
                        if (!$_POST["cmd"]["reset"]) 
                        {
                                if (strcmp($_POST["sel_filter_type"], $key) == 0) 
                                {
                                        $this->tpl->setVariable("VALUE_FILTER_SELECTED", " selected=\"selected\"");
                                }
                        }
                        $this->tpl->parseCurrentBlock();
                }
    
                $this->tpl->setCurrentBlock("filter_questions");
                $this->tpl->setVariable("FILTER_TEXT", $this->lng->txt("filter"));
                $this->tpl->setVariable("TEXT_FILTER_BY", $this->lng->txt("by"));
                if (!$_POST["cmd"]["reset"]) 
                {
                        $this->tpl->setVariable("VALUE_FILTER_TEXT", $_POST["filter_text"]);
                }
                $this->tpl->setVariable("VALUE_SUBMIT_FILTER", $this->lng->txt("set_filter"));
                $this->tpl->setVariable("VALUE_RESET_FILTER", $this->lng->txt("reset_filter"));
                $this->tpl->parseCurrentBlock();
    
                if (!$_POST["cmd"]["reset"]) 
                {
                        if (strlen($_POST["filter_text"]) > 0)
                        {
                                switch($_POST["sel_filter_type"]) 
                                {
                                        case "title":
                                                $where = " AND qpl_questions.title LIKE " . $this->ilias->db->db->quote("%" . $_POST["filter_text"] . "%");
                                                break;
                                        case "comment":
                                                $where = " AND qpl_questions.comment LIKE " . $this->ilias->db->db->quote("%" . $_POST["filter_text"] . "%");
                                                break;
                                        case "author":
                                                $where = " AND qpl_questions.author LIKE " . $this->ilias->db->db->quote("%" . $_POST["filter_text"] . "%");
                                        break;
                                }
                        }
                }
  
        // create edit buttons & table footer
  
        //    if ($this->view_mode == VIEW_MODE_STANDARD) {
                $this->tpl->setCurrentBlock("standard");
                $this->tpl->setVariable("EDIT", $this->lng->txt("edit"));
                $this->tpl->setVariable("DELETE", $this->lng->txt("delete"));
                $this->tpl->setVariable("DUPLICATE", $this->lng->txt("duplicate"));
                $this->tpl->setVariable("EXPORT", $this->lng->txt("export"));
                $this->tpl->parseCurrentBlock();
    
                $this->tpl->setCurrentBlock("Footer");
                $this->tpl->setVariable("ARROW", "<img src=\"" . ilUtil::getImagePath("arrow_downright.gif") . "\" alt=\"\">");
                $this->tpl->parseCurrentBlock();
    
                $this->tpl->setCurrentBlock("QTab");

                // build sort order for sql query
                if (count($_GET["sort"])) 
                {
                        foreach ($_GET["sort"] as $key => $value) 
                        {
                                switch($key) 
                                {
                                        case "title":
                                                $order = " ORDER BY title $value";
                                                $img_title = " <img src=\"" . ilUtil::getImagePath(strtolower($value) . "_order.png", true) . "\" alt=\"" . strtolower($value) . "ending order\" />";
                                        break;
                                        case "comment":
                                                $order = " ORDER BY comment $value";
                                                $img_comment = " <img src=\"" . ilUtil::getImagePath(strtolower($value) . "_order.png", true) . "\" alt=\"" . strtolower($value) . "ending order\" />";
                                        break;
                                        case "type":
                                                $order = " ORDER BY question_type_id $value";
                                                $img_type = " <img src=\"" . ilUtil::getImagePath(strtolower($value) . "_order.png", true) . "\" alt=\"" . strtolower($value) . "ending order\" />";
                                        break;
                                        case "author":
                                                $order = " ORDER BY author $value";
                                                $img_author = " <img src=\"" . ilUtil::getImagePath(strtolower($value) . "_order.png", true) . "\" alt=\"" . strtolower($value) . "ending order\" />";
                                        break;
                                        case "created":
                                                $order = " ORDER BY created $value";
                                                $img_created = " <img src=\"" . ilUtil::getImagePath(strtolower($value) . "_order.png", true) . "\" alt=\"" . strtolower($value) . "ending order\" />";
                                        break;
                                        case "updated":
                                                $order = " ORDER BY TIMESTAMP $value";
                                                $img_updated = " <img src=\"" . ilUtil::getImagePath(strtolower($value) . "_order.png", true) . "\" alt=\"" . strtolower($value) . "ending order\" />";
                                        break;
                                }
                        }
                }

        // display all questions in the question pool
        $query = "SELECT qpl_questions.*, qpl_question_type.type_tag FROM qpl_questions, qpl_question_type WHERE qpl_questions.question_type_fi = qpl_question_type.question_type_id AND qpl_questions.obj_fi = " . $_GET["ref_id"] . " $where$order";
    $query_result = $this->ilias->db->query($query);
    $colors = array("tblrow1", "tblrow2");
    $counter = 0;
    if ($query_result->numRows() > 0)
    {
      while ($data = $query_result->fetchRow(DB_FETCHMODE_OBJECT))
      {
        if (($data->private != 1) or ($data->owner == $this->ilias->account->id)) {
          $this->tpl->setVariable("QUESTION_ID", $data->question_id);
          if ($rbacsystem->checkAccess('edit', $this->ref_id)) {
            $this->tpl->setVariable("QUESTION_TITLE", "<a href=\"" . $_SERVER["PHP_SELF"] . "$add_parameter&edit=$data->question_id\">$data->title</a>");
          } else {
            $this->tpl->setVariable("QUESTION_TITLE", $data->title);
          }
          $this->tpl->setVariable("PREVIEW", "<a href=\"" . $_SERVER["PHP_SELF"] . "$add_parameter&preview=$data->question_id\">" . $this->lng->txt("preview") . "</a>");
          $this->tpl->setVariable("QUESTION_COMMENT", $data->comment);
          $this->tpl->setVariable("QUESTION_TYPE", $this->lng->txt($data->type_tag));
          $this->tpl->setVariable("QUESTION_AUTHOR", $data->author);
          $this->tpl->setVariable("QUESTION_CREATED", ilFormat::formatDate(ilFormat::ftimestamp2dateDB($data->created), "date"));
          $this->tpl->setVariable("QUESTION_UPDATED", ilFormat::formatDate(ilFormat::ftimestamp2dateDB($data->TIMESTAMP), "date"));
          $this->tpl->setVariable("COLOR_CLASS", $colors[$counter % 2]);
          $this->tpl->parseCurrentBlock();
          $counter++;
        }
      }
    }
    
    // if there are no questions, display a message
    if ($counter == 0) {
      $this->tpl->setCurrentBlock("Emptytable");
      $this->tpl->setVariable("TEXT_EMPTYTABLE", $this->lng->txt("no_questions_available"));
      $this->tpl->parseCurrentBlock();
    }
    
    // "create question" form
    $this->tpl->setCurrentBlock("QTypes");
    $query = "SELECT * FROM qpl_question_type ORDER BY question_type_id";
    $query_result = $this->ilias->db->query($query);
    while ($data = $query_result->fetchRow(DB_FETCHMODE_OBJECT))
    {
      $this->tpl->setVariable("QUESTION_TYPE_ID", $data->type_tag);
      $this->tpl->setVariable("QUESTION_TYPE", $this->lng->txt($data->type_tag));
      $this->tpl->parseCurrentBlock();
    }
    $this->tpl->setCurrentBlock("CreateQuestion");
    $this->tpl->setVariable("QUESTION_ADD", $this->lng->txt("create"));
    $this->tpl->setVariable("ACTION_QUESTION_ADD", $_SERVER["PHP_SELF"] . $add_parameter);
    $this->tpl->parseCurrentBlock();

    // define the sort column parameters
    $sort = array(
      "title" => $_GET["sort"]["title"],
      "comment" => $_GET["sort"]["comment"],
      "type" => $_GET["sort"]["type"],
      "author" => $_GET["sort"]["author"],
      "created" => $_GET["sort"]["created"],
      "updated" => $_GET["sort"]["updated"]
    );
    foreach ($sort as $key => $value) {
      if (strcmp($value, "ASC") == 0) {
        $sort[$key] = "DESC";
      } else {
        $sort[$key] = "ASC";
      }
    }
    
    $this->tpl->setCurrentBlock("adm_content");
    // create table header
    $this->tpl->setVariable("QUESTION_TITLE", "<a href=\"" . $_SERVER["PHP_SELF"] . "$add_parameter&sort[title]=" . $sort["title"] . "\">" . $this->lng->txt("title") . "</a>$img_title");
    $this->tpl->setVariable("QUESTION_COMMENT", "<a href=\"" . $_SERVER["PHP_SELF"] . "$add_parameter&sort[comment]=" . $sort["comment"] . "\">" . $this->lng->txt("description") . "</a>$img_comment");
    $this->tpl->setVariable("QUESTION_TYPE", "<a href=\"" . $_SERVER["PHP_SELF"] . "$add_parameter&sort[type]=" . $sort["type"] . "\">" . $this->lng->txt("question_type") . "</a>$img_type");
    $this->tpl->setVariable("QUESTION_AUTHOR", "<a href=\"" . $_SERVER["PHP_SELF"] . "$add_parameter&sort[author]=" . $sort["author"] . "\">" . $this->lng->txt("author") . "</a>$img_author");
    $this->tpl->setVariable("QUESTION_CREATED", "<a href=\"" . $_SERVER["PHP_SELF"] . "$add_parameter&sort[created]=" . $sort["created"] . "\">" . $this->lng->txt("create_date") . "</a>$img_created");
    $this->tpl->setVariable("QUESTION_UPDATED", "<a href=\"" . $_SERVER["PHP_SELF"] . "$add_parameter&sort[updated]=" . $sort["updated"] . "\">" . $this->lng->txt("last_update") . "</a>$img_updated");
    $this->tpl->setVariable("BUTTON_CANCEL", $this->lng->txt("cancel"));
    $this->tpl->setVariable("ACTION_QUESTION_FORM", $_SERVER["PHP_SELF"] . $add_parameter);
    $this->tpl->parseCurrentBlock();
        }
?>