';
            if ('statistics' !== $page) {
                $header .= ''.
                    Display::return_icon('back.png', get_lang('Assessment home'), '', ICON_SIZE_MEDIUM)
                    .'';
                if ((null != $evalobj->get_course_code()) && !$evalobj->has_results()) {
                    $header .= '
    				'.Display::return_icon('evaluation_rate.png', get_lang('Grade learners'), '', ICON_SIZE_MEDIUM).'';
                }
                if (api_is_platform_admin() || false == $evalobj->is_locked()) {
                    $header .= ''.
                        Display::return_icon('import_evaluation.png', get_lang('Import marks'), '', ICON_SIZE_MEDIUM).'';
                }
                if ($evalobj->has_results()) {
                    $header .= ''.
                        Display::return_icon('export_evaluation.png', get_lang('PDF Report'), '', ICON_SIZE_MEDIUM).'';
                    if (api_is_platform_admin() || false == $evalobj->is_locked()) {
                        $header .= ''.
                            Display::return_icon('edit.png', get_lang('Grade learners'), '', ICON_SIZE_MEDIUM).'';
                        $header .= ''.
                            Display::return_icon('delete.png', get_lang('Delete marks'), '', ICON_SIZE_MEDIUM).'';
                    }
                }
                $header .= ''.
                    Display::return_icon('printer.png', get_lang('Print'), '', ICON_SIZE_MEDIUM).'';
            } else {
                $header .= ' '.
                    Display::return_icon('back.png', get_lang('Assessment home'), '', ICON_SIZE_MEDIUM).'';
            }
            $header .= '';
        }
        $scoredisplay = ScoreDisplay::instance();
        $student_score = '';
        $average = '';
        if ($evalobj->has_results()) {
            // TODO this check needed ?
            $score = $evalobj->calc_score();
            if (null != $score) {
                $model = ExerciseLib::getCourseScoreModel();
                if (empty($model)) {
                    $average = get_lang('Average').' : '.$scoredisplay->display_score($score, SCORE_AVERAGE).'';
                    $student_score = $evalobj->calc_score(api_get_user_id());
                    $student_score = Display::tag(
                        'h3',
                        get_lang('Score').': '.$scoredisplay->display_score($student_score, SCORE_DIV_PERCENT)
                    );
                    $allowMultipleAttempts = api_get_configuration_value('gradebook_multiple_evaluation_attempts');
                    if ($allowMultipleAttempts) {
                        $results = Result::load(null, api_get_user_id(), $evalobj->get_id());
                        if (!empty($results)) {
                            /** @var Result $resultData */
                            foreach ($results as $resultData) {
                                $student_score .= ResultTable::getResultAttemptTable($resultData);
                            }
                        }
                    }
                }
            }
        }
        $description = '';
        if ('' == !$evalobj->get_description()) {
            $description = get_lang('Description').' : '.$evalobj->get_description().'
';
        }
        if (null == $evalobj->get_course_code()) {
            $course = get_lang('Independent from course');
        } else {
            $course = CourseManager::getCourseNameFromCode($evalobj->get_course_code());
        }
        $evalinfo = '
';
        $evalinfo .= ''.$evalobj->get_name().' ';
        $evalinfo .= $description;
        $evalinfo .= get_lang('Course').' : '.$course.' ';
        if (empty($model)) {
            $evalinfo .= get_lang('Maximum score').' : '.$evalobj->get_max().' '.$average;
        }
        if (!api_is_allowed_to_edit()) {
            $evalinfo .= $student_score;
        }
        if (!$evalobj->has_results()) {
            $evalinfo .= ' '.get_lang('No results in evaluation for now').'';
        }
        if ('statistics' != $page) {
            if (api_is_allowed_to_edit(null, true)) {
                $evalinfo .= '  '.
                    Display::return_icon(
                        'statistics.png',
                        get_lang('Graphical view'),
                        '',
                        ICON_SIZE_MEDIUM
                    ).'';
            }
        }
        $evalinfo .= ' | '.
            Display::return_icon(
                'tutorial.gif',
                '',
                ['style' => 'float:right; position:relative;']
            )
            .' | 
';
        echo $evalinfo;
        echo $header;
    }
    /**
     * Displays the header for the flatview page containing filters.
     *
     * @param $catobj
     * @param $showeval
     * @param $showlink
     */
    public static function display_header_reduce_flatview($catobj, $showeval, $showlink, $simple_search_form)
    {
        $header = '';
        if (0 == $catobj->get_parent_id()) {
            $select_cat = $catobj->get_id();
            $url = Category::getUrl();
        } else {
            $select_cat = $catobj->get_parent_id();
            $url = 'gradebook_flatview.php';
        }
        $header .= '
'.
            Display::return_icon('back.png', get_lang('Assessment home'), '', ICON_SIZE_MEDIUM).'';
        $pageNum = isset($_GET['flatviewlist_page_nr']) ? intval($_GET['flatviewlist_page_nr']) : null;
        $perPage = isset($_GET['flatviewlist_per_page']) ? intval($_GET['flatviewlist_per_page']) : null;
        $offset = isset($_GET['offset']) ? $_GET['offset'] : '0';
        $exportCsvUrl = api_get_self().'?'.api_get_cidreq().'&'.http_build_query([
            'export_format' => 'csv',
            'export_report' => 'export_report',
            'selectcat' => $catobj->get_id(),
        ]);
        $header .= Display::url(
            Display::return_icon(
                'export_csv.png',
                get_lang('CSV export'),
                '',
                ICON_SIZE_MEDIUM
            ),
            $exportCsvUrl
        );
        $exportXlsUrl = api_get_self().'?'.api_get_cidreq().'&'.http_build_query([
            'export_format' => 'xls',
            'export_report' => 'export_report',
            'selectcat' => $catobj->get_id(),
        ]);
        $header .= Display::url(
            Display::return_icon(
                'export_excel.png',
                get_lang('Excel export'),
                '',
                ICON_SIZE_MEDIUM
            ),
            $exportXlsUrl
        );
        $exportDocUrl = api_get_self().'?'.api_get_cidreq().'&'.http_build_query([
            'export_format' => 'doc',
            'export_report' => 'export_report',
            'selectcat' => $catobj->get_id(),
        ]);
        $header .= Display::url(
            Display::return_icon(
                'export_doc.png',
                get_lang('Export as .doc'),
                '',
                ICON_SIZE_MEDIUM
            ),
            $exportDocUrl
        );
        $exportPrintUrl = api_get_self().'?'.api_get_cidreq().'&'.http_build_query([
                'print' => '',
                'selectcat' => $catobj->get_id(),
            ]);
        $header .= Display::url(
            Display::return_icon(
                'printer.png',
                get_lang('Print'),
                '',
                ICON_SIZE_MEDIUM
            ),
            $exportPrintUrl,
            ['target' => '_blank']
        );
        $exportPdfUrl = api_get_self().'?'.api_get_cidreq().'&'.http_build_query([
            'exportpdf' => '',
            'selectcat' => $catobj->get_id(),
            'offset' => $offset,
            'flatviewlist_page_nr' => $pageNum,
            'flatviewlist_per_page' => $perPage,
        ]);
        $header .= Display::url(
            Display::return_icon(
                'pdf.png',
                get_lang('Export to PDF'),
                '',
                ICON_SIZE_MEDIUM
            ),
            $exportPdfUrl
        );
        $header .= '
 ';
        echo $header;
    }
    /**
     * Displays the header for the gradebook containing the navigation tree and links.
     *
     * @param Category $catobj
     * @param int      $showtree '1' will show the browse tree and naviation buttons
     * @param $selectcat
     * @param bool  $is_course_admin
     * @param bool  $is_platform_admin
     * @param FormValidator  $simple_search_form
     * @param bool  $show_add_qualification Whether to show or not the link to add a new qualification
     *                                      (we hide it in case of the course-embedded tool where we have only one
     *                                      per course or session)
     * @param bool  $show_add_link          Whether to show or not the link to add a new item inside
     *                                      the qualification (we hide it in case of the course-embedded tool
     *                                      where we have only one qualification per course or session)
     * @param array $certificateLinkInfo
     */
    public static function header(
        $catobj,
        $showtree,
        $selectcat,
        $is_course_admin,
        $is_platform_admin,
        $simple_search_form,
        $show_add_qualification = true,
        $show_add_link = true,
        $certificateLinkInfo = []
    ) {
        $userId = api_get_user_id();
        $courseId = api_get_course_int_id();
        $sessionId = api_get_session_id();
        if (!$is_course_admin) {
            $model = ExerciseLib::getCourseScoreModel();
            if (!empty($model)) {
                return '';
            }
        }
        // Student.
        $status = CourseManager::getUserInCourseStatus($userId, $courseId);
        $sessionStatus = 0;
        if (!empty($sessionId)) {
            $sessionStatus = SessionManager::get_user_status_in_course_session(
                $userId,
                $courseId,
                $sessionId
            );
        }
        $objcat = new Category();
        $course_id = CourseManager::get_course_by_category($selectcat);
        $message_resource = $objcat->show_message_resource_delete($course_id);
        $grade_model_id = $catobj->get_grade_model_id();
        $header = null;
        if (isset($catobj) && !empty($catobj)) {
            $categories = Category::load(
                null,
                null,
                null,
                $catobj->get_id(),
                null,
                $sessionId
            );
        }
        if (!$is_course_admin && (1 != $status || 0 == $sessionStatus) && 0 != $selectcat) {
            $catcourse = Category::load($catobj->get_id());
            /** @var Category $category */
            $category = $catcourse[0];
            $main_weight = $category->get_weight();
            $scoredisplay = ScoreDisplay::instance();
            $allevals = $category->get_evaluations($userId, true);
            $alllinks = $category->get_links($userId, true);
            $allEvalsLinks = array_merge($allevals, $alllinks);
            $item_value_total = 0;
            $scoreinfo = null;
            for ($count = 0; $count < count($allEvalsLinks); $count++) {
                $item = $allEvalsLinks[$count];
                $score = $item->calc_score($userId);
                if (!empty($score)) {
                    $divide = 0 == $score[1] ? 1 : $score[1];
                    $item_value = $score[0] / $divide * $item->get_weight();
                    $item_value_total += $item_value;
                }
            }
            $item_total = $main_weight;
            $total_score = [$item_value_total, $item_total];
            $scorecourse_display = $scoredisplay->display_score($total_score, SCORE_DIV_PERCENT);
            if ('0' == !$catobj->get_id() && !isset($_GET['studentoverview']) && !isset($_GET['search'])) {
                $additionalButtons = null;
                if (!empty($certificateLinkInfo)) {
                    $additionalButtons .= '';
                    $additionalButtons .= isset($certificateLinkInfo['certificate_link']) ? $certificateLinkInfo['certificate_link'] : '';
                    $additionalButtons .= isset($certificateLinkInfo['badge_link']) ? $certificateLinkInfo['badge_link'] : '';
                    $additionalButtons .= '
';
                }
                $scoreinfo .= ''.sprintf(get_lang('Total: %s'), $scorecourse_display.$additionalButtons).'';
            }
            echo Display::return_message($scoreinfo, 'normal', false);
        }
        // show navigation tree and buttons?
        if ('1' == $showtree || isset($_GET['studentoverview'])) {
            $header = '';
        }
        // for course admin & platform admin add item buttons are added to the header
        $actionsLeft = '';
        $actionsRight = '';
        $my_api_cidreq = api_get_cidreq();
        $isCoach = api_is_coach(api_get_session_id(), api_get_course_int_id());
        $accessToRead = api_is_allowed_to_edit(null, true) || $isCoach;
        $accessToEdit = api_is_allowed_to_edit(null, true);
        $courseCode = api_get_course_id();
        if ($accessToRead) {
            $my_category = $catobj->showAllCategoryInfo($catobj->get_id());
            if ('0' != $selectcat && $accessToEdit) {
                if ('' == $my_api_cidreq) {
                    $my_api_cidreq = 'cidReq='.$my_category['course_code'];
                }
                if ($show_add_link && !$message_resource) {
                    $actionsLeft .= ''.
                        Display::return_icon('new_evaluation.png', get_lang('Add classroom activity'), '',
                            ICON_SIZE_MEDIUM).'';
                    $cats = Category::load($selectcat);
                    if (null != $cats[0]->get_course_code() && !$message_resource) {
                        $actionsLeft .= ''.
                            Display::return_icon('new_online_evaluation.png', get_lang('Add online activity'), '',
                                ICON_SIZE_MEDIUM).'';
                    } else {
                        $actionsLeft .= ''.
                            Display::return_icon('new_online_evaluation.png', get_lang('Add online activity'), '',
                                ICON_SIZE_MEDIUM).'';
                    }
                }
            }
            if ((empty($grade_model_id) || -1 == $grade_model_id) && $accessToEdit) {
                $actionsLeft .= ''.
                    Display::return_icon(
                        'new_folder.png',
                        get_lang('Add assessment'),
                        [],
                        ICON_SIZE_MEDIUM
                    ).'';
            }
            if ('0' != $selectcat && $accessToRead) {
                if (!$message_resource) {
                    $actionsLeft .= ''.
                        Display::return_icon('statistics.png', get_lang('List View'), '', ICON_SIZE_MEDIUM).'';
                    if (1 == $my_category['generate_certificates']) {
                        $actionsLeft .= Display::url(
                            Display::return_icon(
                                'certificate_list.png',
                                get_lang('See list of learner certificates'),
                                '',
                                ICON_SIZE_MEDIUM
                            ),
                            "gradebook_display_certificate.php?$my_api_cidreq&cat_id=".$selectcat
                        );
                    }
                    $actionsLeft .= Display::url(
                        Display::return_icon(
                            'user.png',
                            get_lang('Students list report'),
                            '',
                            ICON_SIZE_MEDIUM
                        ),
                        "gradebook_display_summary.php?$my_api_cidreq&selectcat=".$selectcat
                    );
                    $allow = api_get_configuration_value('gradebook_custom_student_report');
                    if ($allow) {
                        $actionsLeft .= Display::url(
                            get_lang('Generate custom report'),
                            api_get_path(WEB_AJAX_PATH)."gradebook.ajax.php?$my_api_cidreq&a=generate_custom_report",
                            ['class' => 'btn btn-default ajax']
                        );
                    }
                    // Right icons
                    if ($accessToEdit) {
                        $actionsRight = ''.
                            Display::return_icon('edit.png', get_lang('Edit'), '', ICON_SIZE_MEDIUM).'';
                        if ('true' == api_get_plugin_setting('customcertificate', 'enable_plugin_customcertificate') &&
                            1 == api_get_course_setting('customcertificate_course_enable')
                        ) {
                            $actionsRight .= ''.
                                Display::return_icon(
                                    'certificate.png',
                                    get_lang('Attach certificate'),
                                    '',
                                    ICON_SIZE_MEDIUM
                                ).'';
                        } else {
                            $actionsRight .= ''.
                                Display::return_icon(
                                    'certificate.png',
                                    get_lang('Attach certificate'),
                                    '',
                                    ICON_SIZE_MEDIUM
                                ).'';
                        }
                        if (empty($categories)) {
                            $actionsRight .= ''.
                                Display::return_icon(
                                    'percentage.png',
                                    get_lang('Weight in Report'),
                                    '',
                                    ICON_SIZE_MEDIUM
                                ).'';
                        }
                        $score_display_custom = api_get_setting('gradebook_score_display_custom');
                        if ('true' == api_get_setting('teachers_can_change_score_settings') &&
                            'true' == $score_display_custom
                        ) {
                            $actionsRight .= ''.
                                Display::return_icon('ranking.png', get_lang('Skills ranking'), '', ICON_SIZE_MEDIUM).'';
                        }
                    }
                }
            }
        } elseif (isset($_GET['search'])) {
            echo $header = ''.get_lang('Search results').' :';
        }
        $isDrhOfCourse = CourseManager::isUserSubscribedInCourseAsDrh(
            api_get_user_id(),
            api_get_course_info()
        );
        if ($isDrhOfCourse) {
            $actionsLeft .= ''.
                Display::return_icon(
                    'statistics.png',
                    get_lang('List View'),
                    '',
                    ICON_SIZE_MEDIUM
                ).
                '';
        }
        if ($isCoach || api_is_allowed_to_edit(null, true)) {
            echo $toolbar = Display::toolbarAction(
                'gradebook-actions',
                [$actionsLeft, $actionsRight]
            );
        }
        if ($accessToEdit || api_is_allowed_to_edit(null, true)) {
            $weight = intval($catobj->get_weight()) > 0 ? $catobj->get_weight() : 0;
            $weight = ''.get_lang('Total weight').' : '.$weight;
            $min_certification = intval($catobj->getCertificateMinScore() > 0) ? $catobj->getCertificateMinScore() : 0;
            if (!empty($min_certification)) {
                $model = ExerciseLib::getCourseScoreModel();
                if (!empty($model)) {
                    $defaultCertification = api_number_format($min_certification, 2);
                    $questionWeighting = $catobj->get_weight();
                    foreach ($model['score_list'] as $item) {
                        $i = api_number_format($item['score_to_qualify'] / 100 * $questionWeighting, 2);
                        $model = ExerciseLib::getModelStyle($item, $i);
                        if ($defaultCertification == $i) {
                            $min_certification = $model;
                            break;
                        }
                    }
                }
            }
            $min_certification = get_lang('Minimum certification score').' : '.$min_certification;
            $edit_icon = ''.
                Display::return_icon('edit.png', get_lang('Edit'), [], ICON_SIZE_SMALL).'';
            $msg = $weight.' - '.$min_certification.$edit_icon;
            //@todo show description
            $description = (('' == $catobj->get_description() || is_null($catobj->get_description())) ? '' : ''.get_lang('Assessment description').''.': '.$catobj->get_description());
            echo Display::return_message($msg, 'normal', false);
            if (!empty($description)) {
                echo Display::div($description, []);
            }
        }
    }
    /**
     * @param Category $catobj
     * @param $is_course_admin
     * @param $is_platform_admin
     * @param $simple_search_form
     * @param bool $show_add_qualification
     * @param bool $show_add_link
     */
    public function display_reduce_header_gradebook(
        $catobj,
        $is_course_admin,
        $is_platform_admin,
        $simple_search_form,
        $show_add_qualification = true,
        $show_add_link = true
    ) {
        //student
        if (!$is_course_admin) {
            $user = api_get_user_info(api_get_user_id());
            $catcourse = Category::load($catobj->get_id());
            $scoredisplay = ScoreDisplay::instance();
            $scorecourse = $catcourse[0]->calc_score(api_get_user_id());
            $scorecourse_display = isset($scorecourse) ? $scoredisplay->display_score($scorecourse, SCORE_AVERAGE) : get_lang('No results available');
            $cattotal = Category::load(0);
            $scoretotal = $cattotal[0]->calc_score(api_get_user_id());
            $scoretotal_display = isset($scoretotal) ? $scoredisplay->display_score($scoretotal, SCORE_PERCENT) : get_lang('No results available');
            $scoreinfo = get_lang('Statistics of').' : '.$user['complete_name'].'
';
            if (('0' == !$catobj->get_id()) && (!isset($_GET['studentoverview'])) && (!isset($_GET['search']))) {
                $scoreinfo .= '
'.get_lang('Total for this category.').' : '.$scorecourse_display.'';
            }
            $scoreinfo .= '
'.get_lang('Total').' : '.$scoretotal_display.'';
            Display::addFlash(
                Display::return_message($scoreinfo, 'normal', false)
            );
        }
        // show navigation tree and buttons?
        $header = '';
        if ($is_course_admin) {
            $header .= '
'.Display::return_icon('statistics.png', get_lang('List View'), '', ICON_SIZE_MEDIUM).'';
            $header .= '
'.Display::return_icon('settings.png', get_lang('Skills ranking'), '', ICON_SIZE_MEDIUM).'';
        } elseif (!(isset($_GET['studentoverview']))) {
            $header .= '
'.Display::return_icon('view_list.gif', get_lang('List View')).' '.get_lang('List View').'';
        } else {
            $header .= '
'.Display::return_icon('pdf.png', get_lang('Export to PDF'), '', ICON_SIZE_MEDIUM).'';
        }
        $header .= '
 ';
        echo $header;
    }
    /**
     * @param int $userId
     * @param int $categoryId
     *
     * @return string
     */
    public static function display_header_user($userId, $categoryId)
    {
        $user = api_get_user_info($userId);
        if (empty($user)) {
            return '';
        }
        $catcourse = Category::load($categoryId);
        $scoredisplay = ScoreDisplay::instance();
        // generating the total score for a course
        $allevals = $catcourse[0]->get_evaluations(
            $userId,
            true,
            api_get_course_id()
        );
        $alllinks = $catcourse[0]->get_links(
            $userId,
            true,
            api_get_course_id()
        );
        $evals_links = array_merge($allevals, $alllinks);
        $item_value = 0;
        $item_total = 0;
        for ($count = 0; $count < count($evals_links); $count++) {
            $item = $evals_links[$count];
            $score = $item->calc_score($userId);
            if ($score) {
                $my_score_denom = (0 == $score[1]) ? 1 : $score[1];
                $item_value += $score[0] / $my_score_denom * $item->get_weight();
            }
            $item_total += $item->get_weight();
        }
        $item_value = api_number_format($item_value, 2);
        $total_score = [$item_value, $item_total];
        $scorecourse_display = $scoredisplay->display_score($total_score, SCORE_DIV_PERCENT);
        $info = '';
        $info .= '
';
        $info .= '
';
        $info .= '
';
        $info .= get_lang('Name').' :  '.$user['complete_name_with_message_link'].'
';
        if ('true' == api_get_setting('show_email_addresses')) {
            $info .= get_lang('e-mail').' : 
'.$user['email'].'';
        }
        $info .= get_lang('Total for user').' : 
'.$scorecourse_display.'';
        $info .= '
';
        $info .= '
 ';
        echo $info;
    }
}