chamilo-lms2/main/gradebook/index.php

<?php
/* For licensing terms, see /license.txt */

/**
 * Gradebook controller
 * @package chamilo.gradebook
 */

// $cidReset : This is the main difference with gradebook.php, here we say,
// basically, that we are inside a course, and many things depend from that
//$cidReset = false;
$_in_course = true;
require_once '../inc/global.inc.php';
$current_course_tool  = TOOL_GRADEBOOK;

api_protect_course_script(true);

$course_code = api_get_course_id();
$stud_id = api_get_user_id();
$session_id = api_get_session_id();

//make sure the destination for scripts is index.php instead of gradebook.php
$_SESSION['gradebook_dest'] = 'index.php';

$this_section = SECTION_COURSES;

$htmlHeadXtra[] = '<script>
var show_icon = "'.Display::returnIconPath('view_more_stats.gif').'";
var hide_icon = "'.Display::returnIconPath('view_less_stats.gif').'";

$(document).ready(function() {
    $("body").on("click", ".view_children", function() {
        var id = $(this).attr("data-cat-id");
        $(".hidden_"+id).removeClass("hidden");
        $(this).removeClass("view_children");
        $(this).find("img").attr("src", hide_icon);
        $(this).attr("class", "hide_children");
    });

    $("body").on("click", ".hide_children", function(event) {
        var id = $(this).attr("data-cat-id");
        $(".hidden_"+id).addClass("hidden");
        $(this).removeClass("hide_children");
        $(this).addClass("view_children");
        $(this).find("img").attr("src", show_icon);
    });
/*
  var s1 = [["a",25]];
  var s2 = [["a", 0], ["a", 10], ["a", 10], ["a", 5]];

  var plot3 = $.jqplot("chart3", [s1, s2], {
  colors: ["#000", "#fff"],
    seriesDefaults: {
      // make this a donut chart.
      renderer:$.jqplot.DonutRenderer,
      rendererOptions:{
        // Donuts can be cut into slices like pies.
        sliceMargin: 3 ,
        // Pies and donuts can start at any arbitrary angle.
        startAngle: -90,
        showDataLabels: true,
        // By default, data labels show the percentage of the donut/pie.
        // You can show the data "value" or data "label" instead.
        dataLabels: "value"

      }
    }
  });*/

	for (i=0;i<$(".actions").length;i++) {
		if ($(".actions:eq("+i+")").html()=="<table border=\"0\"></table>" || $(".actions:eq("+i+")").html()=="" || $(".actions:eq("+i+")").html()==null || $(".actions:eq("+i+")").html().split("<TBODY></TBODY>").length==2) {
			$(".actions:eq("+i+")").hide();
		}
	}
});
</script>';
api_block_anonymous_users();
$htmlHeadXtra[]= '<script type="text/javascript">
function confirmation() {
	if (confirm("' . get_lang('DeleteAll') . '?")) {
		return true;
	} else {
		return false;
	}
}
</script>';

$tbl_forum_thread = Database :: get_course_table(TABLE_FORUM_THREAD);
$tbl_attendance   = Database :: get_course_table(TABLE_ATTENDANCE);
$tbl_grade_links  = Database :: get_main_table(TABLE_MAIN_GRADEBOOK_LINK);
$filter_confirm_msg = true;
$filter_warning_msg = true;
$courseInfo = api_get_course_info();

$cats = Category :: load(null, null, $course_code, null, null, $session_id, 'ORDER By id');
$first_time = null;

if (empty($cats)) {
    //first time
    $cats = Category :: load(0, null, $course_code, null, null, $session_id, 'ORDER By id');
    $first_time = 1;
}

$_GET['selectcat'] = $cats[0]->get_id();

if (isset($_GET['isStudentView'])) {
    if ((isset($_GET['selectcat']) && $_GET['selectcat'] > 0) && (isset($_SESSION['studentview']) && $_SESSION['studentview'] == 'true')) {
        $interbreadcrumb[] = array(
            'url' => 'index.php'.'?selectcat=0&isStudentView=true',
            'name' => get_lang('ToolGradebook'),
        );
    }
}

if ((isset($_GET['selectcat']) && $_GET['selectcat']>0) &&
    (isset($_SESSION['studentview']) && $_SESSION['studentview']=='true')
) {

} else {
    if (!isset($_GET['selectcat']) &&
        ($_SESSION['studentview']=='studentview') ||
        (isset($_GET['isStudentView']) && $_GET['isStudentView']=='true')
    ) {
        Display :: display_header(get_lang('Gradebook'));

        //Introduction tool: student view
        Display::display_introduction_section(TOOL_GRADEBOOK, array('ToolbarSet' => 'AssessmentsIntroduction'));
        $addparams=array();
        $cats = Category :: load (0, null, null, null, null, null, false);
        $allcat= $cats[0]->get_subcategories($stud_id, $course_code, $session_id);
        $alleval= $cats[0]->get_evaluations($stud_id);
        $alllink= $cats[0]->get_links($stud_id);
        $gradebooktable= new GradebookTable($cats[0], $allcat, $alleval,$alllink, $addparams);
        $gradebooktable->display();
        Display :: display_footer();
        exit;
    }
}

// ACTIONS
//this is called when there is no data for the course admin
if (isset($_GET['createallcategories'])) {
    GradebookUtils::block_students();
    $coursecat= Category :: get_not_created_course_categories($stud_id);
    if (!count($coursecat) == 0) {
        foreach ($coursecat as $row) {
            $cat= new Category();
            $cat->set_name($row[1]);
            $cat->set_course_code($row[0]);
            $cat->set_description(null);
            $cat->set_user_id($stud_id);
            $cat->set_parent_id(0);
            $cat->set_weight(0);
            $cat->set_visible(0);
            $cat->add();
            unset ($cat);
        }
    }
    header('Location: '.$_SESSION['gradebook_dest'].'?addallcat=&selectcat=0');
    exit;
}

//show logs evaluations
if (isset($_GET['visiblelog'])) {
    header('Location: ' . api_get_self().'/gradebook_showlog_eval.php');
    exit;
}

//move a category
if (isset($_GET['movecat'])) {
    GradebookUtils::block_students();
    $cats= Category :: load($_GET['movecat']);
    if (!isset ($_GET['targetcat'])) {
        $move_form= new CatForm(CatForm :: TYPE_MOVE,
            $cats[0],
            'move_cat_form',
            null,
            api_get_self() . '?movecat=' . Security::remove_XSS($_GET['movecat'])
            . '&selectcat=' . Security::remove_XSS($_GET['selectcat']));
        if ($move_form->validate()) {
            header('Location: ' . api_get_self() . '?selectcat=' . Security::remove_XSS($_GET['selectcat'])
                . '&movecat=' . Security::remove_XSS($_GET['movecat'])
                . '&targetcat=' . $move_form->exportValue('move_cat'));
            exit;
        }
    } else {
        $targetcat = Category :: load($_GET['targetcat']);
        $course_to_crsind = ($cats[0]->get_course_code() != null && $targetcat[0]->get_course_code() == null);

        if (!($course_to_crsind && !isset($_GET['confirm']))) {
            $cats[0]->move_to_cat($targetcat[0]);
            header('Location: ' . api_get_self() . '?categorymoved=&selectcat=' . Security::remove_XSS($_GET['selectcat']));
            exit;
        }
        unset ($targetcat);
    }
    unset ($cats);
}

//move an evaluation
if (isset($_GET['moveeval'])) {
    GradebookUtils::block_students();
    $evals= Evaluation :: load($_GET['moveeval']);
    if (!isset ($_GET['targetcat'])) {

        $move_form= new EvalForm(EvalForm :: TYPE_MOVE,
            $evals[0],
            null,
            'move_eval_form',
            null,
            api_get_self() . '?moveeval=' . Security::remove_XSS($_GET['moveeval'])
            . '&selectcat=' . Security::remove_XSS($_GET['selectcat']));

        if ($move_form->validate()) {
            header('Location: ' .api_get_self() . '?selectcat=' . Security::remove_XSS($_GET['selectcat'])
                . '&moveeval=' . Security::remove_XSS($_GET['moveeval'])
                . '&targetcat=' . $move_form->exportValue('move_cat'));
            exit;
        }
    } else {
        $targetcat= Category :: load($_GET['targetcat']);
        $course_to_crsind = ($evals[0]->get_course_code() != null && $targetcat[0]->get_course_code() == null);

        if (!($course_to_crsind && !isset($_GET['confirm']))) {
            $evals[0]->move_to_cat($targetcat[0]);
            header('Location: ' . api_get_self() . '?evaluationmoved=&selectcat=' . Security::remove_XSS($_GET['selectcat']));
            exit;
        }
        unset ($targetcat);
    }
    unset ($evals);
}

//move a link
if (isset($_GET['movelink'])) {
    GradebookUtils::block_students();
    $link= LinkFactory :: load($_GET['movelink']);
    $move_form = new LinkForm(
        LinkForm :: TYPE_MOVE,
        null,
        $link[0],
        'move_link_form',
        null,
        api_get_self() . '?movelink=' . $_GET['movelink'] . '&selectcat=' . Security::remove_XSS($_GET['selectcat'])
    );

    if ($move_form->validate()) {
        $targetcat= Category :: load($move_form->exportValue('move_cat'));
        $link[0]->move_to_cat($targetcat[0]);
        unset ($link);
        header('Location: ' . api_get_self(). '?linkmoved=&selectcat=' . Security::remove_XSS($_GET['selectcat']));
        exit;
    }
}

//parameters for categories
if (isset($_GET['visiblecat'])) {
    GradebookUtils::block_students();

    if (isset($_GET['set_visible'])) {
        $visibility_command= 1;
    } else {
        $visibility_command= 0;
    }
    $cats = Category :: load($_GET['visiblecat']);
    $cats[0]->set_visible($visibility_command);
    $cats[0]->save();
    $cats[0]->apply_visibility_to_children();
    unset ($cats);
    if ($visibility_command) {
        $confirmation_message = get_lang('ViMod');
        $filter_confirm_msg = false;
    } else {
        $confirmation_message = get_lang('InViMod');
        $filter_confirm_msg = false;
    }
}
if (isset($_GET['deletecat'])) {
    GradebookUtils::block_students();
    $cats = Category :: load($_GET['deletecat']);
    if (isset($cats[0])) {
        //delete all categories,subcategories and results
        if ($cats[0] != null) {
            if ($cats[0]->get_id() != 0) {
                // better don't try to delete the root...
                $cats[0]->delete_all();
            }
        }
    }
    $confirmation_message = get_lang('CategoryDeleted');
    $filter_confirm_msg = false;
}

//parameters for evaluations
if (isset($_GET['visibleeval'])) {
    GradebookUtils::block_students();
    if (isset ($_GET['set_visible'])) {
        $visibility_command= 1;
    } else {
        $visibility_command= 0;
    }
    $eval= Evaluation :: load($_GET['visibleeval']);
    $eval[0]->set_visible($visibility_command);
    $eval[0]->save();
    unset ($eval);
    if ($visibility_command) {
        $confirmation_message = get_lang('ViMod');
        $filter_confirm_msg = false;
    } else {
        $confirmation_message = get_lang('InViMod');
        $filter_confirm_msg = false;
    }
}

//parameters for evaluations
if (isset($_GET['lockedeval'])) {
    GradebookUtils::block_students();
    $locked = Security::remove_XSS($_GET['lockedeval']);
    if (isset($_GET['typelocked']) && api_is_platform_admin()){
        $type_locked = 0;
        $confirmation_message = get_lang('EvaluationHasBeenUnLocked');
    } else {
        $type_locked = 1;
        $confirmation_message = get_lang('EvaluationHasBeenLocked');
    }
    $eval = Evaluation :: load($locked);
    if ($eval[0] != null) {
        $eval[0]->lock($type_locked);
    }

    $filter_confirm_msg = false;
}

if (isset($_GET['deleteeval'])) {
    GradebookUtils::block_students();
    $eval= Evaluation :: load($_GET['deleteeval']);
    if ($eval[0] != null) {
        $eval[0]->delete_with_results();
    }
    $confirmation_message = get_lang('GradebookEvaluationDeleted');
    $filter_confirm_msg = false;
}

//parameters for links
if (isset($_GET['visiblelink'])) {
    GradebookUtils::block_students();
    if (isset ($_GET['set_visible'])) {
        $visibility_command= 1;
    } else {
        $visibility_command= 0;
    }
    $link= LinkFactory :: load($_GET['visiblelink']);
    if (isset($link) && isset($link[0])) {
        $link[0]->set_visible($visibility_command);
        $link[0]->save();
    }
    unset ($link);
    if ($visibility_command) {
        $confirmation_message = get_lang('ViMod');
        $filter_confirm_msg = false;
    } else {
        $confirmation_message = get_lang('InViMod');
        $filter_confirm_msg = false;
    }
}

$course_id = api_get_course_int_id();

if (isset($_GET['deletelink'])) {
    GradebookUtils::block_students();
    $get_delete_link = intval($_GET['deletelink']);
    //fixing #5229
    if (!empty($get_delete_link)) {
        $link= LinkFactory :: load($get_delete_link);
        if ($link[0] != null) {
            // Clean forum qualify
            $sql = 'UPDATE '.$tbl_forum_thread.' SET
                        thread_qualify_max=0,
                        thread_weight=0,
                        thread_title_qualify=""
					WHERE c_id = '.$course_id.' AND thread_id = (
					    SELECT ref_id FROM '.$tbl_grade_links.'
					    WHERE id='.$get_delete_link.' AND type = '.LINK_FORUM_THREAD.'
                    )';
            Database::query($sql);
            // clean attendance
            $sql = 'UPDATE '.$tbl_attendance.' SET
                        attendance_weight = 0,
                        attendance_qualify_title = ""
				 	WHERE c_id = '.$course_id.' AND id = (
				 	    SELECT ref_id FROM '.$tbl_grade_links.'
				 	    WHERE id='.$get_delete_link.' AND type = '.LINK_ATTENDANCE.'
                    )';
            Database::query($sql);
            $link[0]->delete();
        }
        unset ($link);
        $confirmation_message = get_lang('LinkDeleted');
        $filter_confirm_msg = false;
    }
}

if (!empty($course_to_crsind) && !isset($_GET['confirm'])) {
    GradebookUtils::block_students();

    if (!isset($_GET['movecat']) && !isset($_GET['moveeval'])) {
        die ('Error: movecat or moveeval not defined');
    }
    $button = '<form name="confirm" method="post" action="'.api_get_self() .'?confirm='
        .(isset($_GET['movecat']) ? '&movecat=' . Security::remove_XSS($_GET['movecat'])
            : '&moveeval=' . Security::remove_XSS($_GET['moveeval']) )
        .'&selectcat=' . Security::remove_XSS($_GET['selectcat'])
        .'&targetcat=' . Security::remove_XSS($_GET['targetcat']).'">
			   <input type="submit" value="'.get_lang('Ok').'">
			   </form>';
    $warning_message = get_lang('MoveWarning').'<br><br>'.$button;
    $filter_warning_msg = false;
}

$action = isset($_GET['action']) ? $_GET['action'] : null;

switch ($action) {
    case 'lock':
        $category_to_lock = Category :: load($_GET['category_id']);
        $category_to_lock[0]->lock_all_items(1);
        $confirmation_message = get_lang('GradebookLockedAlert');
        break;
    case 'unlock':
        if (api_is_platform_admin()) {
            $category_to_lock = Category :: load($_GET['category_id']);
            $category_to_lock[0]->lock_all_items(0);
            $confirmation_message = get_lang('EvaluationHasBeenUnLocked');
        }
        break;
    case 'export_table':
        //table will be export below
        ob_start();
        break;
}

//actions on the sortabletable
if (isset($_POST['action'])) {
    GradebookUtils::block_students();
    $number_of_selected_items= count($_POST['id']);

    if ($number_of_selected_items == '0') {
        $warning_message = get_lang('NoItemsSelected');
        $filter_warning_msg = false;
    } else {
        switch ($_POST['action']) {
            case 'deleted':
                $number_of_deleted_categories= 0;
                $number_of_deleted_evaluations= 0;
                $number_of_deleted_links= 0;
                foreach ($_POST['id'] as $indexstr) {
                    if (substr($indexstr, 0, 4) == 'CATE') {
                        $cats= Category :: load(substr($indexstr, 4));
                        if ($cats[0] != null) {
                            $cats[0]->delete_all();
                        }
                        $number_of_deleted_categories++;
                    }
                    if (substr($indexstr, 0, 4) == 'EVAL') {
                        $eval= Evaluation :: load(substr($indexstr, 4));
                        if ($eval[0] != null) {
                            $eval[0]->delete_with_results();
                        }

                        $number_of_deleted_evaluations++;
                    }
                    if (substr($indexstr, 0, 4) == 'LINK') {
                        //fixing #5229
                        $id = substr($indexstr, 4);
                        if (!empty($id)) {
                            $link= LinkFactory :: load($id);
                            if ($link[0] != null) {
                                $link[0]->delete();
                            }
                            $number_of_deleted_links++;
                        }
                    }
                }
                $confirmation_message = get_lang('DeletedCategories') . ' : <b>' . $number_of_deleted_categories . '</b><br />' . get_lang('DeletedEvaluations') . ' : <b>' . $number_of_deleted_evaluations . '</b><br />' . get_lang('DeletedLinks') . ' : <b>' . $number_of_deleted_links . '</b><br /><br />' . get_lang('TotalItems') . ' : <b>' . $number_of_selected_items . '</b>';
                $filter_confirm_msg = false;
                break;
            case 'setvisible':
                foreach ($_POST['id'] as $indexstr) {
                    if (substr($indexstr, 0, 4) == 'CATE') {
                        $cats = Category :: load(substr($indexstr, 4));
                        $cats[0]->set_visible(1);
                        $cats[0]->save();
                        $cats[0]->apply_visibility_to_children();
                    }
                    if (substr($indexstr, 0, 4) == 'EVAL') {
                        $eval= Evaluation :: load(substr($indexstr, 4));
                        $eval[0]->set_visible(1);
                        $eval[0]->save();
                    }
                    if (substr($indexstr, 0, 4) == 'LINK') {
                        $link= LinkFactory :: load(substr($indexstr, 4));
                        $link[0]->set_visible(1);
                        $link[0]->save();
                    }
                }
                $confirmation_message = get_lang('ItemsVisible');
                $filter_confirm_msg = false;
                break;
            case 'setinvisible':
                foreach ($_POST['id'] as $indexstr) {
                    if (substr($indexstr, 0, 4) == 'CATE') {
                        $cats = Category :: load(substr($indexstr, 4));
                        $cats[0]->set_visible(0);
                        $cats[0]->save();
                        $cats[0]->apply_visibility_to_children();
                    }
                    if (substr($indexstr, 0, 4) == 'EVAL') {
                        $eval= Evaluation :: load(substr($indexstr, 4));
                        $eval[0]->set_visible(0);
                        $eval[0]->save();
                    }
                    if (substr($indexstr, 0, 4) == 'LINK') {
                        $link= LinkFactory :: load(substr($indexstr, 4));
                        $link[0]->set_visible(0);
                        $link[0]->save();
                    }
                }
                $confirmation_message = get_lang('ItemsInVisible');
                $filter_confirm_msg = false;
                break;
        }
    }
}

if (isset ($_POST['submit']) && isset ($_POST['keyword'])) {
    header('Location: ' . api_get_self() . '?selectcat=' . Security::remove_XSS($_GET['selectcat'])
        . '&search='.Security::remove_XSS($_POST['keyword']));
    exit;
}

// DISPLAY HEADERS AND MESSAGES
if (!isset($_GET['exportpdf'])) {
    if (isset ($_GET['studentoverview'])) {
        $interbreadcrumb[]= array ('url' => $_SESSION['gradebook_dest'].'?selectcat=' . Security::remove_XSS($_GET['selectcat']),'name' => get_lang('ToolGradebook'));
        Display :: display_header(get_lang('FlatView'));
    } elseif (isset ($_GET['search'])) {
        $interbreadcrumb[]= array ('url' => $_SESSION['gradebook_dest'].'?selectcat=' . Security::remove_XSS($_GET['selectcat']),'name' => get_lang('ToolGradebook'));
        Display :: display_header(get_lang('SearchResults'));
    } elseif(isset ($_GET['selectcat'])) {
        $interbreadcrumb[]= array (	'url' =>'#','name' => get_lang('ToolGradebook'));
        if (!isset($_GET['gradebooklist_direction'])) {
            //$interbreadcrumb[]= array ('url' => $_SESSION['gradebook_dest'].'?selectcat=' . Security::remove_XSS($_GET['selectcat']),'name' => get_lang('Details'));
        }
        Display :: display_header('');
    } else {
        Display :: display_header(get_lang('ToolGradebook'));
    }
}

if (isset ($_GET['categorymoved'])) {
    Display :: display_confirmation_message(get_lang('CategoryMoved'),false);
}
if (isset ($_GET['evaluationmoved'])) {
    Display :: display_confirmation_message(get_lang('EvaluationMoved'),false);
}
if (isset ($_GET['linkmoved'])) {
    Display :: display_confirmation_message(get_lang('LinkMoved'),false);
}
if (isset ($_GET['addcat'])) {
    Display :: display_confirmation_message(get_lang('CategoryAdded'),false);
}
if (isset ($_GET['linkadded'])) {
    Display :: display_confirmation_message(get_lang('LinkAdded'),false);
}
if (isset ($_GET['addresult'])) {
    Display :: display_confirmation_message(get_lang('ResultAdded'),false);
}
if (isset ($_GET['editcat'])) {
    Display :: display_confirmation_message(get_lang('CategoryEdited'),false);
}
if (isset ($_GET['editeval'])) {
    Display :: display_confirmation_message(get_lang('EvaluationEdited'),false);
}
if (isset ($_GET['linkedited'])) {
    Display :: display_confirmation_message(get_lang('LinkEdited'),false);
}
if (isset ($_GET['nolinkitems'])){
    Display :: display_warning_message(get_lang('NoLinkItems'),false);
}
if (isset ($_GET['addallcat'])){
    Display :: display_normal_message(get_lang('AddAllCat'),false);
}
if (isset ($confirmation_message)){
    Display :: display_confirmation_message($confirmation_message,$filter_confirm_msg);
}
if (isset ($warning_message)){
    Display :: display_warning_message($warning_message,$filter_warning_msg);
}
if (isset ($move_form)){
    Display :: display_normal_message($move_form->toHtml(),false);
}

// LOAD DATA & DISPLAY TABLE

$is_platform_admin = api_is_platform_admin();
$is_course_admin = api_is_allowed_to_edit(null, true);

//load data for category, evaluation and links
if (empty($_GET['selectcat'])) {
    $category = 0;
} else {
    $category = $_GET['selectcat'];
}
$simple_search_form='';

if (isset($_GET['studentoverview'])) {
    //@todo this code also seems to be deprecated ...
    $cats = Category :: load($category);
    $stud_id= (api_is_allowed_to_edit() ? null : $stud_id);
    $allcat = $cats[0]->get_subcategories($stud_id, $course_code, $session_id);
    $alleval= $cats[0]->get_evaluations($stud_id, true);
    $alllink= $cats[0]->get_links($stud_id, true);
    if (isset ($_GET['exportpdf'])) {
        $datagen = new GradebookDataGenerator($allcat,$alleval, $alllink);
        $header_names = array(
            get_lang('Name'),
            get_lang('Description'),
            get_lang('Weight'),
            get_lang('Date'),
            get_lang('Results'),
        );
        $data_array = $datagen->get_data(GradebookDataGenerator :: GDG_SORT_NAME,0,null,true);
        $newarray = array();
        foreach ($data_array as $data) {
            $newarray[] = array_slice($data, 1);
        }
        $pdf= new Cezpdf();
        $pdf->selectFont(api_get_path(LIBRARY_PATH).'ezpdf/fonts/Courier.afm');
        $pdf->ezSetMargins(30, 30, 50, 30);
        $pdf->ezSetY(810);
        $pdf->ezText(get_lang('FlatView').' ('. api_convert_and_format_date(null, DATE_FORMAT_SHORT). ' ' . api_convert_and_format_date(null, TIME_NO_SEC_FORMAT) .')',12,array('justification'=>'center'));
        $pdf->line(50,790,550,790);
        $pdf->line(50,40,550,40);
        $pdf->ezSetY(750);
        $pdf->ezTable(
            $newarray,
            $header_names,
            '',
            array(
                'showHeadings' => 1,
                'shaded' => 1,
                'showLines' => 1,
                'rowGap' => 3,
                'width' => 500,
            )
        );
        $pdf->ezStream();
        exit;
    }
} else {
    //Student view

    //in any other case (no search, no pdf), print the available gradebooks
    // Important note: loading a category will actually load the *contents* of
    // this category. This means that, to show the categories of a course,
    // we have to show the root category and show its subcategories that
    // are inside this course. This is done at the time of calling
    // $cats[0]->get_subcategories(), not at the time of doing Category::load()
    // $category comes from GET['selectcat']

    //if $category = 0 (which happens when GET['selectcat'] is undefined)
    // then Category::load() will create a new 'root' category with empty
    // course and session fields in memory (Category::create_root_category())

    if ($_in_course === true) {
        // When *inside* a course, we want to make sure there is one (and only
        // one) category for this course or for this session.

        //hack for delete a gradebook from inside course
        /*
        $clean_deletecat = isset($_GET['deletecat']) ? intval($_GET['deletecat']) : null;
        if (!empty($clean_deletecat)) {
            exit;
        }
        //end hack*/

        $cats = Category :: load(null, null, $course_code, null, null, $session_id, false);
        if (empty($cats)) {
            // There is no category for this course+session, so create one
            $cat = new Category();
            if (!empty($session_id)) {
                $s_name = api_get_session_name($session_id);
                $cat->set_name($course_code.' - '.get_lang('Session').' '.$s_name);
                $cat->set_session_id($session_id);
            } else {
                $cat->set_name($course_code);
            }
            $cat->set_course_code($course_code);
            $cat->set_description(null);
            $cat->set_user_id($stud_id);
            $cat->set_parent_id(0);
            $cat->set_weight(100);
            $cat->set_visible(0);
            $cat->set_certificate_min_score(75);
            $can_edit = api_is_allowed_to_edit(true, true);
            if ($can_edit) {
                $cat->add();
            }
            unset($cat);
        }
        unset($cats);
    }
    $cats = Category::load($category, null, null, null, null, null, false);

    //with this fix the teacher only can view 1 gradebook
    if (api_is_platform_admin()) {
        $stud_id = (api_is_allowed_to_edit() ? null : api_get_user_id());
    } else {
        $stud_id = $stud_id;
    }

    $allcat  = $cats[0]->get_subcategories($stud_id, $course_code, $session_id);
    $alleval = $cats[0]->get_evaluations($stud_id);
    $alllink = $cats[0]->get_links($stud_id);
}

// add params to the future links (in the table shown)
$addparams = array('selectcat' => $cats[0]->get_id());

if (isset($_GET['studentoverview'])) {
    $addparams['studentoverview'] = '';
}
//$addparams['cidReq']='';
if (isset($_GET['cidReq']) && $_GET['cidReq']!='') {
    $addparams['cidReq'] = Security::remove_XSS($_GET['cidReq']);
} else {
    $addparams['cidReq']='';
}

$no_qualification = false;

// Show certificate link.
$certificate = array();

$actionsLeft = '';

if ($category != '0') {
    $cat = new Category();
    $category_id   = intval($_GET['selectcat']);
    $course_id     = CourseManager::get_course_by_category($category_id);
    $show_message  = $cat->show_message_resource_delete($course_id);

    if ($show_message == '') {
        // Student
        if (!api_is_allowed_to_edit() && !api_is_excluded_user_type()) {
            $certificate = Category::register_user_certificate(
                $category_id,
                $stud_id
            );
            if (isset($certificate['pdf_url'])) {
                $actionsLeft .= Display::url(Display::returnFontAwesomeIcon('file-pdf-o') .
                    get_lang('DownloadCertificatePdf'),
                    $certificate['pdf_url'],
                    ['class' => 'btn btn-default']
                );
            }

            $currentScore = Category::getCurrentScore($stud_id, $category_id, $course_code, $session_id, true);
            Category::registerCurrentScore($currentScore, $stud_id, $category_id);
        }
    }
}

if (!api_is_allowed_to_edit(null, true)) {
    $actionsLeft .= Display::url(
            Display::returnFontAwesomeIcon('file-pdf-o') . get_lang('DownloadReportPdf'),
            api_get_self()."?".api_get_self()."&action=export_table",
            ['class' => 'btn btn-default']
    );
}

echo $toolbar = Display::toolbarAction('gradebook-student-actions', array(0 => $actionsLeft, 1 => ''));

if (api_is_allowed_to_edit(null, true)) {
    // Tool introduction
    Display::display_introduction_section(TOOL_GRADEBOOK, array('ToolbarSet' => 'AssessmentsIntroduction'));

    if ((isset ($_GET['selectcat']) && $_GET['selectcat']<>0)) {
        //
    } else {
        if ((
                (isset ($_GET['selectcat']) && $_GET['selectcat'] == 0) || (
                (isset($_GET['cidReq']) && $_GET['cidReq'] !== ''))
            ) ||
            isset($_GET['isStudentView']) && $_GET['isStudentView'] == 'false'
        ) {
            $cats = Category:: load(
                null,
                null,
                $course_code,
                null,
                null,
                $session_id,
                false
            );
        }
    }
}

if (isset($first_time) && $first_time==1 && api_is_allowed_to_edit(null,true)) {
    echo '<meta http-equiv="refresh" content="0;url='.api_get_self().'?cidReq='.$course_code.'" />';
} else {
    $cats = Category::load(null, null, $course_code, null, null, $session_id, false);

    if (!empty($cats)) {
        if ((api_get_setting('gradebook_enable_grade_model') == 'true') &&
            (
                api_is_platform_admin() || (api_is_allowed_to_edit(null, true) &&
                api_get_setting('teachers_can_change_grade_model_settings') == 'true')
            )
        ) {
            // Getting grade models.
            $obj = new GradeModel();
            $grade_models = $obj->get_all();
            $grade_model_id = $cats[0]->get_grade_model_id();

            // No children.
            if ((count($cats) == 1 && empty($grade_model_id)) ||
                (count($cats) == 1 && $grade_model_id != -1)
            ) {
                if (!empty($grade_models)) {
                    $form_grade = new FormValidator('grade_model_settings');
                    $obj->fill_grade_model_select_in_form($form_grade, 'grade_model_id', $grade_model_id);
                    $form_grade->addButtonSave(get_lang('Save'));

                    if ($form_grade->validate()) {
                        $value = $form_grade->exportValue('grade_model_id');

                        $gradebook = new Gradebook();
                        $gradebook->update(array('id'=> $cats[0]->get_id(), 'grade_model_id' => $value), true);

                        //do something
                        $obj = new GradeModel();
                        $components = $obj->get_components($value);

                        foreach ($components as $component) {
                            $gradebook =  new Gradebook();
                            $params = array();

                            $params['name'] = $component['acronym'];
                            $params['description'] = $component['title'];
                            $params['user_id'] = api_get_user_id();
                            $params['parent_id'] = $cats[0]->get_id();
                            $params['weight'] = $component['percentage'];
                            $params['session_id'] = api_get_session_id();
                            $params['course_code'] = api_get_course_id();
                            $params['grade_model_id'] = api_get_session_id();

                            $gradebook->save($params);
                        }
                        // Reloading cats
                        $cats = Category :: load(null, null, $course_code, null, null, $session_id, false);
                    } else {
                        $form_grade->display();
                    }
                }
            }
        }

        $i = 0;
        $allcat = array();
        /** @var Category $cat */
        foreach ($cats as $cat) {
            $allcat  = $cat->get_subcategories($stud_id, $course_code, $session_id);
            $alleval = $cat->get_evaluations($stud_id);
            $alllink = $cat->get_links($stud_id, true);

            if ($cat->get_parent_id() != 0) {
                $i++;
            } else {
                // This is the father
                // Create gradebook/add gradebook links.
                DisplayGradebook::header(
                    $cat,
                    0,
                    $cat->get_id(),
                    $is_course_admin,
                    $is_platform_admin,
                    $simple_search_form,
                    false,
                    true,
                    $certificate
                );

                if (api_is_allowed_to_edit(null,true) &&
                    api_get_setting('gradebook_enable_grade_model') == 'true'
                ) {
                    //Showing the grading system
                    if (!empty($grade_models[$grade_model_id])) {
                        Display::display_normal_message(get_lang('GradeModel').': '.$grade_models[$grade_model_id]['name']);
                    }
                }

                $exportToPdf = false;
                if ($action == 'export_table') {
                    $exportToPdf = true;
                }

                $gradebooktable = new GradebookTable(
                    $cat,
                    $allcat,
                    $alleval,
                    $alllink,
                    $addparams,
                    $exportToPdf
                );

                if (api_is_allowed_to_edit()) {
                    $gradebooktable->td_attributes = [
                        4 => 'class=centered'
                    ];
                } else {
                    $gradebooktable->td_attributes = [
                        3 => 'class=centered',
                        4 => 'class=centered',
                        5 => 'class=centered',
                        6 => 'class=centered',
                        7 => 'class=centered'
                    ];

                    if ($action == 'export_table') {
                        unset($gradebooktable->td_attributes[7]);
                    }
                }

                $table = $gradebooktable->return_table();
                $graph = $gradebooktable->getGraph();

                if ($action == 'export_table') {
                    ob_clean();
                    $sessionName = api_get_session_name(api_get_session_id());
                    $sessionName = !empty($sessionName) ? " - $sessionName" : '';
                    $params = array(
                        'pdf_title' => sprintf(get_lang('GradeFromX'), $courseInfo['name']),
                        'course_code' => api_get_course_id(),
                        'session_info' => '',
                        'course_info' => '',
                        'pdf_date' => '',
                        'add_signatures' => false,
                        'student_info' => api_get_user_info(),
                        'show_grade_generated_date' => true,
                        'show_real_course_teachers' => false,
                        'show_teacher_as_myself' => false
                    );

                    $pdf = new PDF('A4', $params['orientation'], $params);

                    $address = api_get_setting('institution_address');
                    $phone = api_get_setting('administratorTelephone');
                    $address = str_replace('\n', '<br />', $address);
                    $pdf->custom_header = array('html' => "<h5  align='right'>$address <br />$phone</h5>");

                    $pdf->html_to_pdf_with_template(
                        $table.
                        $graph.
                        '<br />'.get_lang('Feedback').'<br />
                        <textarea rows="5" cols="100" ></textarea>'
                    );
                } else {
                    echo $table;
                    echo $graph;
                }
            }
        }
    }
}

api_set_in_gradebook();

Display :: display_footer();