/**
  * Function used by SortableTable to generate the data to display
  * @param int $from
  * @param int $per_page
  * @param int $column
  * @param string $direction
  * @param int $sort
  * @return array|mixed
  */
 public function get_table_data($from = 1, $per_page = null, $column = null, $direction = null, $sort = null)
 {
     //variables load in index.php
     global $my_score_in_gradebook, $certificate_min_score;
     $scoretotal = 0;
     // determine sorting type
     $col_adjust = api_is_allowed_to_edit() ? 1 : 0;
     // By id
     $this->column = 5;
     switch ($this->column) {
         // Type
         case 0 + $col_adjust:
             $sorting = GradebookDataGenerator::GDG_SORT_TYPE;
             break;
         case 1 + $col_adjust:
             $sorting = GradebookDataGenerator::GDG_SORT_NAME;
             break;
         case 2 + $col_adjust:
             $sorting = GradebookDataGenerator::GDG_SORT_DESCRIPTION;
             break;
         case 3 + $col_adjust:
             $sorting = GradebookDataGenerator::GDG_SORT_WEIGHT;
             break;
         case 4 + $col_adjust:
             $sorting = GradebookDataGenerator::GDG_SORT_DATE;
         case 5 + $col_adjust:
             $sorting = GradebookDataGenerator::GDG_SORT_ID;
             break;
     }
     if ($this->direction == 'DESC') {
         $sorting |= GradebookDataGenerator::GDG_SORT_DESC;
     } else {
         $sorting |= GradebookDataGenerator::GDG_SORT_ASC;
     }
     //status of user in course
     $user_id = api_get_user_id();
     $course_code = api_get_course_id();
     $courseId = api_get_course_int_id();
     $session_id = api_get_session_id();
     $status_user = api_get_status_of_user_in_course($user_id, $courseId);
     $data_array = $this->datagen->get_data($sorting, $from, $this->per_page);
     // generate the data to display
     $sortable_data = array();
     $weight_total_links = 0;
     $main_categories = array();
     $main_cat = Category::load(null, null, $course_code, null, null, $session_id, false);
     $total_categories_weight = 0;
     $scoredisplay = ScoreDisplay::instance();
     //Categories
     foreach ($data_array as $data) {
         // list of items inside the gradebook (exercises, lps, forums, etc)
         $row = array();
         $item = $item_category = $data[0];
         $id = $item->get_id();
         //if the item is invisible, wrap it in a span with class invisible
         $invisibility_span_open = api_is_allowed_to_edit() && $item->is_visible() == '0' ? '<span class="invisible">' : '';
         $invisibility_span_close = api_is_allowed_to_edit() && $item->is_visible() == '0' ? '</span>' : '';
         if (api_is_allowed_to_edit(null, true)) {
             //id
             $row[] = $this->build_id_column($item);
         }
         //Type
         $row[] = $this->build_type_column($item);
         //Name
         if (get_class($item) == 'Category') {
             $row[] = $invisibility_span_open . '<h3>' . $item->get_name() . '</h3>' . $invisibility_span_close;
             $main_categories[$item->get_id()]['name'] = $item->get_name();
         } else {
             $row[] = $invisibility_span_open . $this->build_name_link($item) . $invisibility_span_close;
             $main_categories[$item->get_id()]['name'] = $this->build_name_link($item);
         }
         $main_categories[$item->get_id()]['weight'] = $item->get_weight();
         $total_categories_weight += $item->get_weight();
         //Description
         $row[] = $invisibility_span_open . $data[2] . $invisibility_span_close;
         //Weight
         //$row[] = $invisibility_span_open .Display::tag('h4', $data['3'] .' / '.$this->currentcat->get_weight()).$invisibility_span_close;
         //$average = $data['3']/$this->currentcat->get_weight()*100;
         $average = $scoredisplay->display_score(array($data['3'], $this->currentcat->get_weight()), SCORE_SIMPLE, SCORE_BOTH, true);
         if (api_is_allowed_to_edit(null, true)) {
             $row[] = $invisibility_span_open . Display::tag('h4', $average) . $invisibility_span_close;
         } else {
             $row[] = $invisibility_span_open . $average . $invisibility_span_close;
         }
         $category_weight = $item->get_weight();
         if (api_is_allowed_to_edit(null, true)) {
             $weight_total_links += $data[3];
         } else {
             $cattotal = Category::load($_GET['selectcat']);
             $scoretotal = $cattotal[0]->calc_score(api_get_user_id());
             $item_value = $scoredisplay->display_score($scoretotal, SCORE_SIMPLE);
         }
         //Date
         //$row[] = $invisibility_span_open.$data[4].$invisibility_span_close;
         //Edit (for admins)
         if (api_is_allowed_to_edit(null, true)) {
             $cat = new Category();
             $show_message = $cat->show_message_resource_delete($item->get_course_code());
             if ($show_message === false) {
                 $row[] = $this->build_edit_column($item);
             }
         } else {
             //students get the results and certificates columns
             if (count($this->evals_links) > 0 && $status_user != 1) {
                 $value_data = isset($data[4]) ? $data[4] : null;
                 if (!is_null($value_data)) {
                     $row[] = Display::tag('h4', $value_data);
                 } else {
                     $row[] = $this->build_edit_column($item);
                 }
             } else {
                 $score = $item->calc_score(api_get_user_id());
                 if (!empty($score[1])) {
                     $complete_score = $scoredisplay->display_score($score, SCORE_DIV_PERCENT);
                     $score = $score[0] / $score[1] * $item->get_weight();
                     $score = $scoredisplay->display_score(array($score, null), SCORE_SIMPLE);
                     $row[] = Display::tip($score, $complete_score);
                 } else {
                     $row[] = '-';
                 }
                 if (!empty($this->cats)) {
                     $row[] = $this->build_edit_column($item);
                 }
             }
         }
         //Category added
         $sortable_data[] = $row;
         // Loading childrens
         if (get_class($item) == 'Category') {
             $stud_id = api_get_user_id();
             $course_code = api_get_course_id();
             $session_id = api_get_session_id();
             $parent_id = $item->get_id();
             $cats = Category::load($parent_id, null, null, null, null, null);
             if (isset($cats[0])) {
                 $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);
                 $sub_cat_info = new GradebookDataGenerator($allcat, $alleval, $alllink);
                 $data_array = $sub_cat_info->get_data($sorting, $from, $this->per_page);
                 $total_weight = 0;
                 //Links
                 foreach ($data_array as $data) {
                     $row = array();
                     $item = $data[0];
                     //if the item is invisible, wrap it in a span with class invisible
                     $invisibility_span_open = api_is_allowed_to_edit() && $item->is_visible() == '0' ? '<span class="invisible">' : '';
                     $invisibility_span_close = api_is_allowed_to_edit() && $item->is_visible() == '0' ? '</span>' : '';
                     $main_categories[$parent_id]['children'][$item->get_id()]['name'] = $item->get_name();
                     $main_categories[$parent_id]['children'][$item->get_id()]['weight'] = $item->get_weight();
                     if (api_is_allowed_to_edit(null, true)) {
                         $row[] = $this->build_id_column($item);
                     }
                     $row[] = $this->build_type_column($item, array('style' => 'padding-left:5px'));
                     //Name
                     $row[] = $invisibility_span_open . "&nbsp;&nbsp;&nbsp;  " . $this->build_name_link($item) . $invisibility_span_close;
                     //Description
                     $row[] = $invisibility_span_open . $data[2] . $invisibility_span_close;
                     //Weight
                     //$weight = $data[3]/$category_weight*$main_cat[0]->get_weight();
                     $weight = $data[3];
                     //$extra = " - $data[3]  $category_weight -".$main_cat[0]->get_weight();
                     $total_weight += $weight;
                     $row[] = $invisibility_span_open . $weight . $invisibility_span_close;
                     if (api_is_allowed_to_edit(null, true)) {
                         //$weight_total_links += intval($data[3]);
                     } else {
                         $cattotal = Category::load($_GET['selectcat']);
                         $scoretotal = $cattotal[0]->calc_score(api_get_user_id());
                         $item_value = $scoretotal[0];
                     }
                     //Date
                     //$row[] = $invisibility_span_open.$data[4].$invisibility_span_close;
                     //Admins get an edit column
                     if (api_is_allowed_to_edit(null, true)) {
                         $cat = new Category();
                         $show_message = $cat->show_message_resource_delete($item->get_course_code());
                         if ($show_message === false) {
                             $row[] = $this->build_edit_column($item);
                         }
                     } else {
                         //students get the results and certificates columns
                         $eval_n_links = array_merge($alleval, $alllink);
                         if (count($eval_n_links) > 0 && $status_user != 1) {
                             $value_data = isset($data[4]) ? $data[4] : null;
                             if (!is_null($value_data)) {
                                 $score = $item->calc_score(api_get_user_id());
                                 $new_score = $data[3] * $score[0] / $score[1];
                                 $new_score = floatval(number_format($new_score, api_get_setting('gradebook_number_decimals')));
                                 $row[] = Display::tip($new_score, $data[4]);
                             }
                         }
                         if (!empty($cats)) {
                             $row[] = null;
                         }
                     }
                     $row['child_of'] = $parent_id;
                     $sortable_data[] = $row;
                 }
                 //"Warning row"
                 if (!empty($data_array)) {
                     if (api_is_allowed_to_edit()) {
                         // Compare the category weight to the sum of all weights inside the category
                         if (intval($total_weight) == $category_weight) {
                             $label = null;
                             $total = score_badges(array($total_weight . ' / ' . $category_weight, '100'));
                         } else {
                             $label = Display::return_icon('warning.png', sprintf(get_lang('TotalWeightMustBeX'), $category_weight));
                             $total = Display::badge($total_weight . ' / ' . $category_weight, 'warning');
                         }
                         $row = array(null, null, "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<h5>" . get_lang('SubTotal') . '</h5>', null, $total . ' ' . $label, 'child_of' => $parent_id);
                         $sortable_data[] = $row;
                     }
                 }
             }
         }
         //end looping categories
     }
     //end looping categories
     if (api_is_allowed_to_edit()) {
         if (count($main_cat) > 1) {
             $main_weight = intval($main_cat[0]->get_weight());
             if (intval($total_categories_weight) == $main_weight) {
                 $total = score_badges(array($total_categories_weight . ' / ' . $main_weight, '100'));
             } else {
                 $total = Display::badge($total_categories_weight . ' / ' . $main_weight, 'warning');
             }
             $row = array(null, null, '<h3>' . get_lang('Total') . '</h3>', null, $total);
             $sortable_data[] = $row;
         }
     }
     // warning messages
     $view = isset($_GET['view']) ? $_GET['view'] : null;
     if (api_is_allowed_to_edit()) {
         if (isset($_GET['selectcat']) && $_GET['selectcat'] > 0 && $view != 'presence') {
             $id_cat = intval($_GET['selectcat']);
             $category = Category::load($id_cat);
             //$weight_category = intval($this->build_weight($category[0]));
             $weight_category = intval($this->build_weight($category[0]));
             $course_code = $this->build_course_code($category[0]);
             $weight_total_links = round($weight_total_links);
             if ($weight_total_links > $weight_category || $weight_total_links < $weight_category || $weight_total_links > $weight_category) {
                 $warning_message = sprintf(get_lang('TotalWeightMustBeX'), $weight_category);
                 $modify_icons = '<a class="right_link" href="gradebook_edit_cat.php?editcat=' . $id_cat . '&cidReq=' . $course_code . '">' . Display::return_icon('edit.png', $warning_message, array(), ICON_SIZE_SMALL) . '</a>';
                 $warning_message .= $modify_icons;
                 Display::display_warning_message($warning_message, false);
             }
             $content_html = DocumentManager::replace_user_info_into_html(api_get_user_id(), $course_code);
             if (!empty($content_html)) {
                 $new_content = explode('</head>', $content_html['content']);
             }
             if (empty($new_content[0])) {
                 $warning_message = get_lang('ThereIsNotACertificateAvailableByDefault');
                 $cert_icon = '<a class="right_link" href="../document/document.php?curdirpath=/certificates&' . $course_code . '&origin=gradebook&selectcat=' . $id_cat . '">' . Display::return_icon('certificate.png', get_lang('AttachCertificate'), array(), ICON_SIZE_SMALL) . '</a>';
                 Display::display_warning_message($warning_message . $cert_icon, false);
             }
         }
         if (empty($_GET['selectcat'])) {
             $categories = Category::load();
             $weight_categories = $certificate_min_scores = $course_codes = array();
             foreach ($categories as $category) {
                 $course_code_category = $this->build_course_code($category);
                 if (!empty($course_code)) {
                     if ($course_code_category == $course_code) {
                         $weight_categories[] = intval($this->build_weight($category));
                         $certificate_min_scores[] = intval($this->build_certificate_min_score($category));
                         $course_codes[] = $course_code;
                         break;
                     }
                 } else {
                     $weight_categories[] = intval($this->build_weight($category));
                     $certificate_min_scores[] = intval($this->build_certificate_min_score($category));
                     $course_codes[] = $course_code_category;
                 }
             }
             if (is_array($weight_categories) && is_array($certificate_min_scores) && is_array($course_codes)) {
                 $warning_message = '';
                 for ($x = 0; $x < count($weight_categories); $x++) {
                     $weight_category = intval($weight_categories[$x]);
                     $certificate_min_score = intval($certificate_min_scores[$x]);
                     $course_code = $course_codes[$x];
                     if (empty($certificate_min_score) || $certificate_min_score > $weight_category) {
                         $warning_message .= $course_code . '&nbsp;-&nbsp;' . get_lang('CertificateMinimunScoreIsRequiredAndMustNotBeMoreThan') . '&nbsp;' . $weight_category . '<br />';
                     }
                 }
                 if (!empty($warning_message)) {
                     Display::display_warning_message($warning_message, false);
                 }
             }
         }
     }
     return $sortable_data;
 }
        $allcat_info = Category::find_category($keyword, $allcat);
        $alleval = array();
        $alllink = array();
    } else {
        $alleval = Evaluation::find_evaluations($keyword, $cats[0]->get_id());
        $alllink = LinkFactory::find_links($keyword, $cats[0]->get_id());
    }
} elseif (isset($_GET['studentoverview'])) {
    //@todo this code seems to be deprecated because the gradebook tab is off
    $cats = Category::load($category);
    $stud_id = api_is_allowed_to_edit() ? null : api_get_user_id();
    $allcat = array();
    $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));
 /**
  * Function used by SortableTable to generate the data to display
  * @param int $from
  * @param int $per_page
  * @param int $column
  * @param string $direction
  * @param int $sort
  * @return array|mixed
  */
 public function get_table_data($from = 1, $per_page = null, $column = null, $direction = null, $sort = null)
 {
     //variables load in index.php
     global $certificate_min_score;
     // determine sorting type
     $col_adjust = api_is_allowed_to_edit() ? 1 : 0;
     // By id
     $this->column = 5;
     switch ($this->column) {
         // Type
         case 0 + $col_adjust:
             $sorting = GradebookDataGenerator::GDG_SORT_TYPE;
             break;
         case 1 + $col_adjust:
             $sorting = GradebookDataGenerator::GDG_SORT_NAME;
             break;
         case 2 + $col_adjust:
             $sorting = GradebookDataGenerator::GDG_SORT_DESCRIPTION;
             break;
         case 3 + $col_adjust:
             $sorting = GradebookDataGenerator::GDG_SORT_WEIGHT;
             break;
         case 4 + $col_adjust:
             $sorting = GradebookDataGenerator::GDG_SORT_DATE;
         case 5 + $col_adjust:
             $sorting = GradebookDataGenerator::GDG_SORT_ID;
             break;
     }
     if ($this->direction == 'DESC') {
         $sorting |= GradebookDataGenerator::GDG_SORT_DESC;
     } else {
         $sorting |= GradebookDataGenerator::GDG_SORT_ASC;
     }
     // Status of user in course.
     $user_id = $this->userId;
     $course_code = api_get_course_id();
     $session_id = api_get_session_id();
     $status_user = api_get_status_of_user_in_course(api_get_user_id(), api_get_course_int_id());
     if (empty($session_id)) {
         $statusToFilter = STUDENT;
     } else {
         $statusToFilter = 0;
     }
     if (empty($this->studentList)) {
         $studentList = CourseManager::get_user_list_from_course_code($course_code, $session_id, null, null, $statusToFilter);
         $this->studentList = $studentList;
     }
     $this->datagen->userId = $this->userId;
     $data_array = $this->datagen->get_data($sorting, $from, $this->per_page, false, $this->studentList);
     // generate the data to display
     $sortable_data = array();
     $weight_total_links = 0;
     $main_categories = array();
     $main_cat = Category::load(null, null, $course_code, null, null, $session_id, 'ORDER BY id');
     $total_categories_weight = 0;
     $scoredisplay = ScoreDisplay::instance();
     $totalResult = [0, 0];
     $totalBest = [0, 0];
     $totalAverage = [0, 0];
     $type = 'detail';
     if ($this->exportToPdf) {
         $type = 'simple';
     }
     // Categories.
     if (!empty($data_array)) {
         foreach ($data_array as $data) {
             // list of items inside the gradebook (exercises, lps, forums, etc)
             $row = array();
             /** @var AbstractLink $item */
             $item = $mainCategory = $data[0];
             //if the item is invisible, wrap it in a span with class invisible
             $invisibility_span_open = api_is_allowed_to_edit() && $item->is_visible() == '0' ? '<span class="invisible">' : '';
             $invisibility_span_close = api_is_allowed_to_edit() && $item->is_visible() == '0' ? '</span>' : '';
             // Id
             if ($this->teacherView) {
                 if ($this->exportToPdf == false) {
                     $row[] = $this->build_id_column($item);
                 }
             }
             // Type.
             $row[] = $this->build_type_column($item);
             // Name.
             if (get_class($item) == 'Category') {
                 $row[] = $invisibility_span_open . '<strong>' . $item->get_name() . '</strong>' . $invisibility_span_close;
                 $main_categories[$item->get_id()]['name'] = $item->get_name();
             } else {
                 $name = $this->build_name_link($item, $type);
                 $row[] = $invisibility_span_open . $name . $invisibility_span_close;
                 $main_categories[$item->get_id()]['name'] = $name;
             }
             $this->dataForGraph['categories'][] = $item->get_name();
             $main_categories[$item->get_id()]['weight'] = $item->get_weight();
             $total_categories_weight += $item->get_weight();
             // Description.
             if ($this->exportToPdf == false) {
                 $row[] = $invisibility_span_open . $data[2] . $invisibility_span_close;
             }
             // Weight.
             $weight = $scoredisplay->display_score(array($data['3'], $this->currentcat->get_weight()), SCORE_SIMPLE, SCORE_BOTH, true);
             if ($this->teacherView) {
                 $row[] = $invisibility_span_open . Display::tag('p', $weight, array('class' => 'score')) . $invisibility_span_close;
             } else {
                 $row[] = $invisibility_span_open . $weight . $invisibility_span_close;
             }
             $category_weight = $item->get_weight();
             $mainCategoryWeight = $main_cat[0]->get_weight();
             if ($this->teacherView) {
                 $weight_total_links += $data[3];
             } else {
                 $cattotal = Category::load($_GET['selectcat']);
                 $scoretotal = $cattotal[0]->calc_score($this->userId);
                 $item_value = $scoredisplay->display_score($scoretotal, SCORE_SIMPLE);
             }
             // Edit (for admins).
             if ($this->teacherView) {
                 $cat = new Category();
                 $show_message = $cat->show_message_resource_delete($item->get_course_code());
                 if ($show_message === false) {
                     $row[] = $this->build_edit_column($item);
                 }
             } else {
                 $score = $item->calc_score($this->userId);
                 if (!empty($score[1])) {
                     $completeScore = $scoredisplay->display_score($score, SCORE_DIV_PERCENT);
                     $score = $score[0] / $score[1] * $item->get_weight();
                     $score = $scoredisplay->display_score(array($score, null), SCORE_SIMPLE);
                     $scoreToDisplay = Display::tip($score, $completeScore);
                 } else {
                     $scoreToDisplay = '-';
                     $categoryScore = null;
                 }
                 // Students get the results and certificates columns
                 //if (count($this->evals_links) > 0 && $status_user != 1) {
                 if (1) {
                     $value_data = isset($data[4]) ? $data[4] : null;
                     $best = isset($data['best']) ? $data['best'] : null;
                     $average = isset($data['average']) ? $data['average'] : null;
                     $ranking = isset($data['ranking']) ? $data['ranking'] : null;
                     $totalResult = [$totalResult[0] + $data['result_score_weight'][0], $totalResult[1] + $data['result_score_weight'][1]];
                     $totalBest = [$totalBest[0] + $data['best_score'][0], $totalBest[1] + $data['best_score'][1]];
                     $totalAverage = [$totalAverage[0] + $data['average_score'][0], $totalAverage[1] + $data['average_score'][1]];
                     // Student result
                     $row[] = $value_data;
                     $totalResultAverageValue = strip_tags($scoredisplay->display_score($totalResult, SCORE_AVERAGE));
                     $this->dataForGraph['my_result'][] = (double) str_replace('%', '', $totalResultAverageValue);
                     $totalAverageValue = strip_tags($scoredisplay->display_score($totalAverage, SCORE_AVERAGE));
                     $this->dataForGraph['average'][] = (double) str_replace('%', '', $totalAverageValue);
                     // Ranking
                     $row[] = $ranking;
                     // Best
                     $row[] = $best;
                     // Average
                     $row[] = $average;
                     if (get_class($item) == 'Category') {
                         if ($this->exportToPdf == false) {
                             $row[] = $this->build_edit_column($item);
                         }
                     }
                 } else {
                     $row[] = $scoreToDisplay;
                     if (!empty($this->cats)) {
                         if ($this->exportToPdf == false) {
                             $row[] = $this->build_edit_column($item);
                         }
                     }
                 }
             }
             // Category added.
             $sortable_data[] = $row;
             // Loading children
             if (get_class($item) == 'Category') {
                 $course_code = api_get_course_id();
                 $session_id = api_get_session_id();
                 $parent_id = $item->get_id();
                 $cats = Category::load($parent_id, null, null, null, null, null);
                 if (isset($cats[0])) {
                     $allcat = $cats[0]->get_subcategories($this->userId, $course_code, $session_id);
                     $alleval = $cats[0]->get_evaluations($this->userId);
                     $alllink = $cats[0]->get_links($this->userId);
                     $sub_cat_info = new GradebookDataGenerator($allcat, $alleval, $alllink);
                     $sub_cat_info->userId = $user_id;
                     $data_array2 = $sub_cat_info->get_data($sorting, $from, $this->per_page, false, $this->studentList);
                     $total_weight = 0;
                     // Links.
                     foreach ($data_array2 as $data) {
                         $row = array();
                         $item = $data[0];
                         //if the item is invisible, wrap it in a span with class invisible
                         $invisibility_span_open = api_is_allowed_to_edit() && $item->is_visible() == '0' ? '<span class="invisible">' : '';
                         $invisibility_span_close = api_is_allowed_to_edit() && $item->is_visible() == '0' ? '</span>' : '';
                         if (isset($item)) {
                             $main_categories[$parent_id]['children'][$item->get_id()]['name'] = $item->get_name();
                             $main_categories[$parent_id]['children'][$item->get_id()]['weight'] = $item->get_weight();
                         }
                         if ($this->teacherView) {
                             if ($this->exportToPdf == false) {
                                 $row[] = $this->build_id_column($item);
                             }
                         }
                         // Type
                         $row[] = $this->build_type_column($item, array('style' => 'padding-left:5px'));
                         // Name.
                         $row[] = $invisibility_span_open . "&nbsp;&nbsp;&nbsp;  " . $this->build_name_link($item, $type) . $invisibility_span_close;
                         // Description.
                         if ($this->exportToPdf == false) {
                             $row[] = $invisibility_span_open . $data[2] . $invisibility_span_close;
                         }
                         $weight = $data[3];
                         $total_weight += $weight;
                         // Weight
                         $row[] = $invisibility_span_open . $weight . $invisibility_span_close;
                         if ($this->teacherView) {
                             //$weight_total_links += intval($data[3]);
                         } else {
                             $cattotal = Category::load($_GET['selectcat']);
                             $scoretotal = $cattotal[0]->calc_score($this->userId);
                             $item_value = $scoretotal[0];
                         }
                         // Admins get an edit column.
                         if (api_is_allowed_to_edit(null, true) && isset($_GET['user_id']) == false && (isset($_GET['action']) && $_GET['action'] != 'export_all' || !isset($_GET['action']))) {
                             $cat = new Category();
                             $show_message = $cat->show_message_resource_delete($item->get_course_code());
                             if ($show_message === false) {
                                 if ($this->exportToPdf == false) {
                                     $row[] = $this->build_edit_column($item);
                                 }
                             }
                         } else {
                             // Students get the results and certificates columns
                             $eval_n_links = array_merge($alleval, $alllink);
                             if (count($eval_n_links) > 0) {
                                 $value_data = isset($data[4]) ? $data[4] : null;
                                 if (!is_null($value_data)) {
                                     //$score = $item->calc_score(api_get_user_id());
                                     //$new_score = $data[3] * $score[0] / $score[1];
                                     //$new_score = floatval(number_format($new_score, api_get_setting('gradebook_number_decimals')));
                                     // Result
                                     $row[] = $value_data;
                                     $best = isset($data['best']) ? $data['best'] : null;
                                     $average = isset($data['average']) ? $data['average'] : null;
                                     $ranking = isset($data['ranking']) ? $data['ranking'] : null;
                                     // Ranking
                                     $row[] = $ranking;
                                     // Best
                                     $row[] = $best;
                                     // Average
                                     $row[] = $average;
                                 }
                             }
                             if (!empty($cats)) {
                                 if ($this->exportToPdf == false) {
                                     $row[] = null;
                                 }
                             }
                         }
                         if ($this->exportToPdf == false) {
                             $row['child_of'] = $parent_id;
                         }
                         $sortable_data[] = $row;
                     }
                     // "Warning row"
                     if (!empty($data_array)) {
                         if ($this->teacherView) {
                             // Compare the category weight to the sum of all weights inside the category
                             if (intval($total_weight) == $category_weight) {
                                 $label = null;
                                 $total = GradebookUtils::score_badges(array($total_weight . ' / ' . $category_weight, '100'));
                             } else {
                                 $label = Display::return_icon('warning.png', sprintf(get_lang('TotalWeightMustBeX'), $category_weight));
                                 $total = Display::badge($total_weight . ' / ' . $category_weight, 'warning');
                             }
                             $row = array(null, null, "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<h5>" . get_lang('SubTotal') . '</h5>', null, $total . ' ' . $label, 'child_of' => $parent_id);
                             $sortable_data[] = $row;
                         }
                     }
                 }
             }
         }
     }
     //end looping categories
     $main_weight = 0;
     if (count($main_cat) > 1) {
         /** @var Category $myCat */
         foreach ($main_cat as $myCat) {
             $myParentId = $myCat->get_parent_id();
             if ($myParentId == 0) {
                 $main_weight = intval($myCat->get_weight());
             }
         }
     }
     if ($this->teacherView) {
         // Total for teacher.
         if (count($main_cat) > 1) {
             if (intval($total_categories_weight) == $main_weight) {
                 $total = GradebookUtils::score_badges(array($total_categories_weight . ' / ' . $main_weight, '100'));
             } else {
                 $total = Display::badge($total_categories_weight . ' / ' . $main_weight, 'warning');
             }
             $row = array(null, null, '<strong>' . get_lang('Total') . '</strong>', null, $total);
             $sortable_data[] = $row;
         }
     } else {
         // Total for student.
         if (count($main_cat) > 1) {
             $main_weight = intval($main_cat[0]->get_weight());
             $global = null;
             $average = null;
             // Overwrite main weight
             $totalResult[1] = $main_weight;
             $totalResult = $scoredisplay->display_score($totalResult, SCORE_DIV);
             $totalRanking = array();
             $invalidateRanking = true;
             $average = 0;
             foreach ($this->studentList as $student) {
                 $score = $main_cat[0]->calc_score($student['user_id']);
                 if (!empty($score[0])) {
                     $invalidateRanking = false;
                 }
                 $totalRanking[$student['user_id']] = $score[0];
                 $average += $score[0];
             }
             $totalRanking = AbstractLink::getCurrentUserRanking($user_id, $totalRanking);
             $totalRanking = $scoredisplay->display_score($totalRanking, SCORE_DIV, SCORE_BOTH, true);
             if ($invalidateRanking) {
                 $totalRanking = null;
             }
             // Overwrite main weight
             $totalBest[1] = $main_weight;
             $totalBest = $scoredisplay->display_score($totalBest, SCORE_DIV, SCORE_BOTH, true);
             // Overwrite main weight
             $totalAverage[0] = $average / count($this->studentList);
             $totalAverage[1] = $main_weight;
             $totalAverage = $scoredisplay->display_score($totalAverage, SCORE_DIV, SCORE_BOTH, true);
             if ($this->exportToPdf) {
                 $row = array(null, '<h3>' . get_lang('Total') . '</h3>', $main_weight, $totalResult, $totalRanking, $totalBest, $totalAverage);
             } else {
                 $row = array(null, '<h3>' . get_lang('Total') . '</h3>', null, $main_weight, $totalResult, $totalRanking, $totalBest, $totalAverage);
             }
             $sortable_data[] = $row;
         }
     }
     // Warning messages
     $view = isset($_GET['view']) ? $_GET['view'] : null;
     if ($this->teacherView) {
         if (isset($_GET['selectcat']) && $_GET['selectcat'] > 0 && $view != 'presence') {
             $id_cat = intval($_GET['selectcat']);
             $category = Category::load($id_cat);
             $weight_category = intval($this->build_weight($category[0]));
             $course_code = $this->build_course_code($category[0]);
             $weight_total_links = round($weight_total_links);
             if ($weight_total_links > $weight_category || $weight_total_links < $weight_category || $weight_total_links > $weight_category) {
                 $warning_message = sprintf(get_lang('TotalWeightMustBeX'), $weight_category);
                 $modify_icons = '<a href="gradebook_edit_cat.php?editcat=' . $id_cat . '&cidReq=' . $course_code . '&id_session=' . api_get_session_id() . '">' . Display::return_icon('edit.png', $warning_message, array(), ICON_SIZE_SMALL) . '</a>';
                 $warning_message .= $modify_icons;
                 Display::display_warning_message($warning_message, false);
             }
             $content_html = DocumentManager::replace_user_info_into_html(api_get_user_id(), $course_code);
             if (!empty($content_html)) {
                 $new_content = explode('</head>', $content_html['content']);
             }
             if (empty($new_content[0])) {
                 // Set default certificate
                 $courseData = api_get_course_info($course_code);
                 DocumentManager::generateDefaultCertificate($courseData);
             }
         }
         if (empty($_GET['selectcat'])) {
             $categories = Category::load();
             $weight_categories = $certificate_min_scores = $course_codes = array();
             foreach ($categories as $category) {
                 $course_code_category = $this->build_course_code($category);
                 if (!empty($course_code)) {
                     if ($course_code_category == $course_code) {
                         $weight_categories[] = intval($this->build_weight($category));
                         $certificate_min_scores[] = intval($this->build_certificate_min_score($category));
                         $course_codes[] = $course_code;
                         break;
                     }
                 } else {
                     $weight_categories[] = intval($this->build_weight($category));
                     $certificate_min_scores[] = intval($this->build_certificate_min_score($category));
                     $course_codes[] = $course_code_category;
                 }
             }
             if (is_array($weight_categories) && is_array($certificate_min_scores) && is_array($course_codes)) {
                 $warning_message = '';
                 for ($x = 0; $x < count($weight_categories); $x++) {
                     $weight_category = intval($weight_categories[$x]);
                     $certificate_min_score = intval($certificate_min_scores[$x]);
                     $course_code = $course_codes[$x];
                     if (empty($certificate_min_score) || $certificate_min_score > $weight_category) {
                         $warning_message .= $course_code . '&nbsp;-&nbsp;' . get_lang('CertificateMinimunScoreIsRequiredAndMustNotBeMoreThan') . '&nbsp;' . $weight_category . '<br />';
                     }
                 }
                 if (!empty($warning_message)) {
                     Display::display_warning_message($warning_message, false);
                 }
             }
         }
     }
     return $sortable_data;
 }