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

/**
 * Class GradebookUtils.
 */
class GradebookUtils
{
    /**
     * Adds a resource to the unique gradebook of a given course.
     *
     * @param   int
     * @param   string  Course code
     * @param   int     Resource type (use constants defined in linkfactory.class.php)
     * @param   int     Resource ID in the corresponding tool
     * @param   string  Resource name to show in the gradebook
     * @param   int     Resource weight to set in the gradebook
     * @param   int     Resource max
     * @param   string  Resource description
     * @param   int     Visibility (0 hidden, 1 shown)
     * @param   int     Session ID (optional or 0 if not defined)
     * @param   int
     * @param int $resource_type
     *
     * @return bool True on success, false on failure
     */
    public static function add_resource_to_course_gradebook(
        $category_id,
        $course_code,
        $resource_type,
        $resource_id,
        $resource_name = '',
        $weight = 0,
        $max = 0,
        $resource_description = '',
        $visible = 0,
        $session_id = 0,
        $link_id = null
    ) {
        $link = LinkFactory::create($resource_type);
        $link->set_user_id(api_get_user_id());
        $link->set_course_code($course_code);

        if (empty($category_id)) {
            return false;
        }
        $link->set_category_id($category_id);
        if ($link->needs_name_and_description()) {
            $link->set_name($resource_name);
        } else {
            $link->set_ref_id($resource_id);
        }
        $link->set_weight($weight);

        if ($link->needs_max()) {
            $link->set_max($max);
        }
        if ($link->needs_name_and_description()) {
            $link->set_description($resource_description);
        }

        $link->set_visible(empty($visible) ? 0 : 1);

        if (!empty($session_id)) {
            $link->set_session_id($session_id);
        }
        $link->add();

        return true;
    }

    /**
     * Update a resource weight.
     *
     * @param    int     Link/Resource ID
     * @param   string
     * @param float
     *
     * @return bool false on error, true on success
     */
    public static function updateResourceFromCourseGradebook(
        $link_id,
        $course_code,
        $weight
    ) {
        $link_id = (int) $link_id;
        $courseInfo = api_get_course_info($course_code);
        if (!empty($link_id) && !empty($courseInfo)) {
            $link_id = intval($link_id);
            $courseId = $courseInfo['real_id'];
            $sql = 'UPDATE '.Database::get_main_table(TABLE_MAIN_GRADEBOOK_LINK).'
                    SET weight = '."'".api_float_val($weight)."'".'
                    WHERE c_id = "'.$courseId.'" AND id = '.$link_id;
            Database::query($sql);
        }

        return true;
    }

    /**
     * Remove a resource from the unique gradebook of a given course.
     *
     * @param    int     Link/Resource ID
     *
     * @return bool false on error, true on success
     */
    public static function remove_resource_from_course_gradebook($link_id)
    {
        if (empty($link_id)) {
            return false;
        }

        // TODO find the corresponding category (the first one for this course, ordered by ID)
        $l = Database::get_main_table(TABLE_MAIN_GRADEBOOK_LINK);
        $sql = "DELETE FROM $l WHERE id = ".(int) $link_id;
        Database::query($sql);

        return true;
    }

    /**
     * Block students.
     */
    public static function block_students()
    {
        $sessionId = api_get_session_id();
        if (empty($sessionId)) {
            if (!api_is_allowed_to_edit()) {
                api_not_allowed();
            }
        } else {
            $isCoach = api_is_coach(api_get_session_id(), api_get_course_int_id());
            if ($isCoach === false) {
                if (!api_is_allowed_to_edit()) {
                    api_not_allowed();
                }
            }
        }
    }

    /**
     * Builds an img tag for a gradebook item.
     */
    public static function build_type_icon_tag($kind, $attributes = [])
    {
        return Display::return_icon(
            self::get_icon_file_name($kind),
            ' ',
            $attributes,
            ICON_SIZE_SMALL
        );
    }

    /**
     * Returns the icon filename for a gradebook item.
     *
     * @param string $type value returned by a gradebookitem's get_icon_name()
     *
     * @return string
     */
    public static function get_icon_file_name($type)
    {
        switch ($type) {
            case 'cat':
                $icon = 'gradebook.png';
                break;
            case 'evalempty':
                $icon = 'empty_evaluation.png';
                break;
            case 'evalnotempty':
                $icon = 'no_empty_evaluation.png';
                break;
            case 'exercise':
            case LINK_EXERCISE:
                $icon = 'quiz.png';
                break;
            case 'learnpath':
            case LINK_LEARNPATH:
                $icon = 'learnpath.png';
                break;
            case 'studentpublication':
            case LINK_STUDENTPUBLICATION:
                $icon = 'works.gif';
                break;
            case 'link':
                $icon = 'link.gif';
                break;
            case 'forum':
            case LINK_FORUM_THREAD:
                $icon = 'forum.gif';
                break;
            case 'attendance':
            case LINK_ATTENDANCE:
                $icon = 'attendance.gif';
                break;
            case 'survey':
            case LINK_SURVEY:
                $icon = 'survey.gif';
                break;
            case 'dropbox':
            case LINK_DROPBOX:
                $icon = 'dropbox.gif';
                break;
            default:
                $icon = 'link.gif';
                break;
        }

        return $icon;
    }

    /**
     * Builds the course or platform admin icons to edit a category.
     *
     * @param Category $cat       category
     * @param Category $selectcat id of selected category
     *
     * @return string
     */
    public static function build_edit_icons_cat($cat, $selectcat)
    {
        $show_message = $cat->show_message_resource_delete($cat->get_course_code());
        $grade_model_id = $selectcat->get_grade_model_id();
        $selectcat = $selectcat->get_id();
        $modify_icons = null;

        if ($show_message === false) {
            $visibility_icon = ($cat->is_visible() == 0) ? 'invisible' : 'visible';
            $visibility_command = ($cat->is_visible() == 0) ? 'set_visible' : 'set_invisible';

            $modify_icons .= '<a class="view_children" data-cat-id="'.$cat->get_id().'" href="javascript:void(0);">'.
                Display::return_icon(
                    'view_more_stats.gif',
                    get_lang('Show'),
                    '',
                    ICON_SIZE_SMALL
                ).
                '</a>';

            if (!api_is_allowed_to_edit(null, true)) {
                $modify_icons .= Display::url(
                    Display::return_icon(
                        'statistics.png',
                        get_lang('List View'),
                        '',
                        ICON_SIZE_SMALL
                    ),
                    'personal_stats.php?'.http_build_query([
                        'selectcat' => $cat->get_id(),
                    ]).'&'.api_get_cidreq(),
                    [
                        'class' => 'ajax',
                        'data-title' => get_lang('List View'),
                    ]
                );
            }

            $courseParams = api_get_cidreq_params(
                $cat->get_course_code(),
                $cat->get_session_id()
            );

            if (api_is_allowed_to_edit(null, true)) {
                // Locking button
                if (api_get_setting('gradebook_locking_enabled') == 'true') {
                    if ($cat->is_locked()) {
                        if (api_is_platform_admin()) {
                            $modify_icons .= '&nbsp;<a onclick="javascript:if (!confirm(\''.addslashes(get_lang('Are you sure you want to unlock this element?')).'\')) return false;" href="'.api_get_self().'?'.api_get_cidreq().'&category_id='.$cat->get_id().'&action=unlock">'.
                                Display::return_icon('lock.png', get_lang('Unlock evaluation.'), '', ICON_SIZE_SMALL).'</a>';
                        } else {
                            $modify_icons .= '&nbsp;<a href="#">'.
                                Display::return_icon('lock_na.png', get_lang('This assessment has been locked. You cannot unlock it. If you really need to unlock it, please contact the platform administrator, explaining the reason why you would need to do that (it might otherwise be considered as fraud attempt).'), '', ICON_SIZE_SMALL).'</a>';
                        }
                        $modify_icons .= '&nbsp;<a href="gradebook_flatview.php?export_pdf=category&selectcat='.$cat->get_id().'" >'.Display::return_icon('pdf.png', get_lang('Export to PDF'), '', ICON_SIZE_SMALL).'</a>';
                    } else {
                        $modify_icons .= '&nbsp;<a onclick="javascript:if (!confirm(\''.addslashes(get_lang('Are you sure you want to lock this item? After locking this item you can\'t edit the user results. To unlock it, you need to contact the platform administrator.')).'\')) return false;" href="'.api_get_self().'?'.api_get_cidreq().'&category_id='.$cat->get_id().'&action=lock">'.
                            Display::return_icon('unlock.png', get_lang('Lock evaluation'), '', ICON_SIZE_SMALL).'</a>';
                        $modify_icons .= '&nbsp;<a href="#" >'.
                            Display::return_icon('pdf_na.png', get_lang('Export to PDF'), '', ICON_SIZE_SMALL).'</a>';
                    }
                }

                if (empty($grade_model_id) || $grade_model_id == -1) {
                    if ($cat->is_locked() && !api_is_platform_admin()) {
                        $modify_icons .= Display::return_icon(
                            'edit_na.png',
                            get_lang('Edit'),
                            '',
                            ICON_SIZE_SMALL
                        );
                    } else {
                        $modify_icons .= '<a href="gradebook_edit_cat.php?editcat='.$cat->get_id().'&'.$courseParams.'">'.
                            Display::return_icon(
                                'edit.png',
                                get_lang('Edit'),
                                '',
                                ICON_SIZE_SMALL
                            ).'</a>';
                    }
                }

                $modify_icons .= '<a href="gradebook_edit_all.php?selectcat='.$cat->get_id().'&'.$courseParams.'">'.
                    Display::return_icon(
                        'percentage.png',
                        get_lang('Weight in Report'),
                        '',
                        ICON_SIZE_SMALL
                    ).'</a>';

                $modify_icons .= '<a href="gradebook_flatview.php?selectcat='.$cat->get_id().'&'.$courseParams.'">'.
                    Display::return_icon(
                        'statistics.png',
                        get_lang('List View'),
                        '',
                        ICON_SIZE_SMALL
                    ).'</a>';
                $modify_icons .= '&nbsp;<a href="'.api_get_self().'?visiblecat='.$cat->get_id().'&'.$visibility_command.'=&selectcat='.$selectcat.'&'.$courseParams.'">'.
                    Display::return_icon(
                        $visibility_icon.'.png',
                        get_lang('Visible'),
                        '',
                        ICON_SIZE_SMALL
                    ).'</a>';

                if ($cat->is_locked() && !api_is_platform_admin()) {
                    $modify_icons .= Display::return_icon(
                        'delete_na.png',
                        get_lang('Delete all'),
                        '',
                        ICON_SIZE_SMALL
                    );
                } else {
                    $modify_icons .= '&nbsp;<a href="'.api_get_self().'?deletecat='.$cat->get_id().'&selectcat='.$selectcat.'&'.$courseParams.'" onclick="return confirmation();">'.
                        Display::return_icon(
                            'delete.png',
                            get_lang('Delete all'),
                            '',
                            ICON_SIZE_SMALL
                        ).
                        '</a>';
                }
            }

            return $modify_icons;
        }
    }

    /**
     * Builds the course or platform admin icons to edit an evaluation.
     *
     * @param Evaluation $eval      evaluation object
     * @param int        $selectcat id of selected category
     *
     * @return string
     */
    public static function build_edit_icons_eval($eval, $selectcat)
    {
        $is_locked = $eval->is_locked();
        $eval->get_course_code();
        $cat = new Category();
        $message_eval = $cat->show_message_resource_delete($eval->get_course_code());
        $courseParams = api_get_cidreq_params($eval->get_course_code(), $eval->getSessionId());

        if ($message_eval === false && api_is_allowed_to_edit(null, true)) {
            $visibility_icon = $eval->is_visible() == 0 ? 'invisible' : 'visible';
            $visibility_command = $eval->is_visible() == 0 ? 'set_visible' : 'set_invisible';
            if ($is_locked && !api_is_platform_admin()) {
                $modify_icons = Display::return_icon(
                    'edit_na.png',
                    get_lang('Edit'),
                    '',
                    ICON_SIZE_SMALL
                );
            } else {
                $modify_icons = '<a href="gradebook_edit_eval.php?editeval='.$eval->get_id().'&'.$courseParams.'">'.
                    Display::return_icon(
                        'edit.png',
                        get_lang('Edit'),
                        '',
                        ICON_SIZE_SMALL
                    ).
                    '</a>';
            }

            $modify_icons .= '&nbsp;<a href="'.api_get_self().'?visibleeval='.$eval->get_id().'&'.$visibility_command.'=&selectcat='.$selectcat.'&'.$courseParams.' ">'.
                Display::return_icon(
                    $visibility_icon.'.png',
                    get_lang('Visible'),
                    '',
                    ICON_SIZE_SMALL
                ).
                '</a>';

            if (api_is_allowed_to_edit(null, true)) {
                $modify_icons .= '&nbsp;<a href="gradebook_showlog_eval.php?visiblelog='.$eval->get_id().'&selectcat='.$selectcat.' &'.$courseParams.'">'.
                    Display::return_icon(
                        'history.png',
                        get_lang('Assessment history'),
                        '',
                        ICON_SIZE_SMALL
                    ).
                    '</a>';

                $allowStats = api_get_configuration_value('allow_gradebook_stats');
                if ($allowStats) {
                    $modify_icons .= Display::url(
                        Display::return_icon('reload.png', get_lang('Generate statistics')),
                        api_get_self().'?itemId='.$eval->get_id().'&action=generate_eval_stats&selectcat='.$selectcat.'&'.$courseParams
                    );
                }
            }

            if ($is_locked && !api_is_platform_admin()) {
                $modify_icons .= '&nbsp;'.
                    Display::return_icon(
                        'delete_na.png',
                        get_lang('Delete'),
                        '',
                        ICON_SIZE_SMALL
                    );
            } else {
                $modify_icons .= '&nbsp;<a href="'.api_get_self().'?deleteeval='.$eval->get_id().'&selectcat='.$selectcat.' &'.$courseParams.'" onclick="return confirmation();">'.
                    Display::return_icon(
                        'delete.png',
                        get_lang('Delete'),
                        '',
                        ICON_SIZE_SMALL
                    ).
                    '</a>';
            }

            return $modify_icons;
        }
    }

    /**
     * Builds the course or platform admin icons to edit a link.
     *
     * @param AbstractLink $link
     * @param int          $selectcat id of selected category
     *
     * @return string
     */
    public static function build_edit_icons_link($link, $selectcat)
    {
        $cat = new Category();
        $message_link = $cat->show_message_resource_delete($link->get_course_code());
        $is_locked = $link->is_locked();

        $modify_icons = null;

        if (!api_is_allowed_to_edit(null, true)) {
            return null;
        }

        $courseParams = api_get_cidreq_params(
            $link->get_course_code(),
            $link->get_session_id()
        );

        if ($message_link === false) {
            $visibility_icon = $link->is_visible() == 0 ? 'invisible' : 'visible';
            $visibility_command = $link->is_visible() == 0 ? 'set_visible' : 'set_invisible';

            if ($is_locked && !api_is_platform_admin()) {
                $modify_icons = Display::return_icon(
                    'edit_na.png',
                    get_lang('Edit'),
                    '',
                    ICON_SIZE_SMALL
                );
            } else {
                $modify_icons = '<a href="gradebook_edit_link.php?editlink='.$link->get_id().'&'.$courseParams.'">'.
                    Display::return_icon(
                        'edit.png',
                        get_lang('Edit'),
                        '',
                        ICON_SIZE_SMALL
                    ).
                    '</a>';
            }
            $modify_icons .= '&nbsp;<a href="'.api_get_self().'?visiblelink='.$link->get_id().'&'.$visibility_command.'=&selectcat='.$selectcat.'&'.$courseParams.' ">'.
                Display::return_icon(
                    $visibility_icon.'.png',
                    get_lang('Visible'),
                    '',
                    ICON_SIZE_SMALL
                ).
                '</a>';

            $modify_icons .= '&nbsp;<a href="gradebook_showlog_link.php?visiblelink='.$link->get_id().'&selectcat='.$selectcat.'&'.$courseParams.'">'.
                Display::return_icon(
                    'history.png',
                    get_lang('Assessment history'),
                    '',
                    ICON_SIZE_SMALL
                ).
                '</a>';

            $allowStats = api_get_configuration_value('allow_gradebook_stats');
            if ($allowStats && $link->get_type() == LINK_EXERCISE) {
                $modify_icons .= Display::url(
                    Display::return_icon('reload.png', get_lang('Generate statistics')),
                    api_get_self().'?itemId='.$link->get_id().'&action=generate_link_stats&selectcat='.$selectcat.'&'.$courseParams
                );
            }

            //If a work is added in a gradebook you can only delete the link in the work tool
            if ($is_locked && !api_is_platform_admin()) {
                $modify_icons .= '&nbsp;'.
                    Display::return_icon(
                        'delete_na.png',
                        get_lang('Delete'),
                        '',
                        ICON_SIZE_SMALL
                    );
            } else {
                $modify_icons .= '&nbsp;<a href="'.api_get_self().'?deletelink='.$link->get_id().'&selectcat='.$selectcat.' &'.$courseParams.'" onclick="return confirmation();">'.
                    Display::return_icon(
                        'delete.png',
                        get_lang('Delete'),
                        '',
                        ICON_SIZE_SMALL
                    ).
                    '</a>';
            }

            return $modify_icons;
        }
    }

    /**
     * Checks if a resource is in the unique gradebook of a given course.
     *
     * @param string $course_code   Course code
     * @param int    $resource_type Resource type (use constants defined in linkfactory.class.php)
     * @param int    $resource_id   Resource ID in the corresponding tool
     * @param int    $session_id    Session ID (optional -  0 if not defined)
     *
     * @return array false on error or array of resource
     */
    public static function isResourceInCourseGradebook(
        $course_code,
        $resource_type,
        $resource_id,
        $session_id = 0
    ) {
        $table = Database::get_main_table(TABLE_MAIN_GRADEBOOK_LINK);
        $courseInfo = api_get_course_info($course_code);
        if (empty($courseInfo)) {
            return [];
        }

        $sql = "SELECT * FROM $table l
                WHERE
                    c_id = ".$courseInfo['real_id']." AND
                    type = ".(int) $resource_type." AND
                    ref_id = ".(int) $resource_id;
        $res = Database::query($sql);

        if (Database::num_rows($res) < 1) {
            return false;
        }
        $row = Database::fetch_array($res, 'ASSOC');

        return $row;
    }

    /**
     * Return the course id.
     *
     * @param    int
     *
     * @return string
     */
    public static function get_course_id_by_link_id($id_link)
    {
        $course_table = Database::get_main_table(TABLE_MAIN_COURSE);
        $tbl_grade_links = Database::get_main_table(TABLE_MAIN_GRADEBOOK_LINK);
        $id_link = (int) $id_link;

        $sql = 'SELECT c.id FROM '.$course_table.' c
                INNER JOIN '.$tbl_grade_links.' l
                ON c.id = l.c_id
                WHERE l.id='.intval($id_link).' OR l.category_id='.intval($id_link);
        $res = Database::query($sql);
        $array = Database::fetch_array($res, 'ASSOC');

        return $array['id'];
    }

    /**
     * @param $type
     *
     * @return string
     */
    public static function get_table_type_course($type)
    {
        global $table_evaluated;

        return Database::get_course_table($table_evaluated[$type][0]);
    }

    /**
     * @param Category $cat
     * @param $users
     * @param $alleval
     * @param $alllinks
     * @param $params
     * @param null $mainCourseCategory
     *
     * @return array
     */
    public static function get_printable_data(
        $cat,
        $users,
        $alleval,
        $alllinks,
        $params,
        $mainCourseCategory = null
    ) {
        $datagen = new FlatViewDataGenerator(
            $users,
            $alleval,
            $alllinks,
            $params,
            $mainCourseCategory
        );

        $offset = isset($_GET['offset']) ? (int) $_GET['offset'] : 0;

        // step 2: generate rows: students
        $datagen->category = $cat;

        $count = (($offset + 10) > $datagen->get_total_items_count()) ? ($datagen->get_total_items_count() - $offset) : GRADEBOOK_ITEM_LIMIT;
        $header_names = $datagen->get_header_names($offset, $count, true);
        $data_array = $datagen->get_data(
            FlatViewDataGenerator::FVDG_SORT_LASTNAME,
            0,
            null,
            $offset,
            $count,
            true,
            true
        );

        $result = [];
        foreach ($data_array as $data) {
            $result[] = array_slice($data, 1);
        }
        $return = [$header_names, $result];

        return $return;
    }

    /**
     * XML-parser: handle character data.
     */
    public static function character_data($parser, $data)
    {
        global $current_value;
        $current_value = $data;
    }

    public static function overwritescore($resid, $importscore, $eval_max)
    {
        $result = Result::load($resid);
        if ($importscore > $eval_max) {
            header('Location: gradebook_view_result.php?selecteval='.Security::remove_XSS($_GET['selecteval']).'&overwritemax=');
            exit;
        }
        $result[0]->set_score($importscore);
        $result[0]->save();
        unset($result);
    }

    /**
     * register user info about certificate.
     *
     * @param int    $cat_id            The category id
     * @param int    $user_id           The user id
     * @param float  $score_certificate The score obtained for certified
     * @param string $date_certificate  The date when you obtained the certificate
     */
    public static function registerUserInfoAboutCertificate(
        $cat_id,
        $user_id,
        $score_certificate,
        $date_certificate
    ) {
        $table = Database::get_main_table(TABLE_MAIN_GRADEBOOK_CERTIFICATE);
        $cat_id = (int) $cat_id;
        $user_id = (int) $user_id;

        $sql = "SELECT COUNT(id) as count
                FROM $table gc
                WHERE gc.cat_id = $cat_id AND user_id = $user_id ";
        $rs_exist = Database::query($sql);
        $row = Database::fetch_array($rs_exist);
        if ($row['count'] == 0) {
            $params = [
                'cat_id' => $cat_id,
                'user_id' => $user_id,
                'score_certificate' => $score_certificate,
                'created_at' => $date_certificate,
            ];
            Database::insert($table, $params);
        }
    }

    /**
     * Get date of user certificate.
     *
     * @param int $cat_id  The category id
     * @param int $user_id The user id
     *
     * @return Datetime The date when you obtained the certificate
     */
    public static function get_certificate_by_user_id($cat_id, $user_id)
    {
        $table = Database::get_main_table(TABLE_MAIN_GRADEBOOK_CERTIFICATE);
        $cat_id = (int) $cat_id;
        $user_id = (int) $user_id;

        $sql = "SELECT * FROM $table
                WHERE cat_id = $cat_id AND user_id = $user_id ";

        $result = Database::query($sql);
        $row = Database::fetch_array($result, 'ASSOC');

        return $row;
    }

    /**
     * Get list of users certificates.
     *
     * @param int   $cat_id   The category id
     * @param array $userList Only users in this list
     *
     * @return array
     */
    public static function get_list_users_certificates($cat_id = null, $userList = [])
    {
        $table_certificate = Database::get_main_table(TABLE_MAIN_GRADEBOOK_CERTIFICATE);
        $table_user = Database::get_main_table(TABLE_MAIN_USER);
        $sql = 'SELECT DISTINCT u.user_id, u.lastname, u.firstname, u.username
                FROM '.$table_user.' u
                INNER JOIN '.$table_certificate.' gc
                ON u.user_id=gc.user_id ';
        if (!is_null($cat_id) && $cat_id > 0) {
            $sql .= ' WHERE cat_id='.intval($cat_id);
        }
        if (!empty($userList)) {
            $userList = array_map('intval', $userList);
            $userListCondition = implode("','", $userList);
            $sql .= " AND u.user_id IN ('$userListCondition')";
        }
        $sql .= ' ORDER BY '.(api_sort_by_first_name() ? 'u.firstname' : 'u.lastname');
        $rs = Database::query($sql);

        $list_users = [];
        while ($row = Database::fetch_array($rs)) {
            $list_users[] = $row;
        }

        return $list_users;
    }

    public static function getTotalCertificates($urlId)
    {
        $urlId = (int) $urlId;
        $table_certificate = Database::get_main_table(TABLE_MAIN_GRADEBOOK_CERTIFICATE);
        $table_user = Database::get_main_table(TABLE_MAIN_USER);
        $sql = 'SELECT DISTINCT u.user_id, u.lastname, u.firstname, u.username
                FROM '.$table_user.' u
                INNER JOIN '.$table_certificate.' gc
                ON u.user_id=gc.user_id ';
        if (!is_null($cat_id) && $cat_id > 0) {
            $sql .= ' WHERE cat_id='.intval($cat_id);
        }
        if (!empty($userList)) {
            $userList = array_map('intval', $userList);
            $userListCondition = implode("','", $userList);
            $sql .= " AND u.user_id IN ('$userListCondition')";
        }
        $sql .= ' ORDER BY '.(api_sort_by_first_name() ? 'u.firstname' : 'u.lastname');
        $rs = Database::query($sql);

        $list_users = [];
        while ($row = Database::fetch_array($rs)) {
            $list_users[] = $row;
        }

        return $list_users;
    }

    /**
     * Gets the certificate list by user id.
     *
     * @param int $user_id The user id
     * @param int $cat_id  The category id
     *
     * @return array
     */
    public static function get_list_gradebook_certificates_by_user_id(
        $user_id,
        $cat_id = null
    ) {
        $user_id = (int) $user_id;
        $table_certificate = Database::get_main_table(TABLE_MAIN_GRADEBOOK_CERTIFICATE);
        $sql = 'SELECT
                    gc.score_certificate,
                    gc.created_at,
                    gc.path_certificate,
                    gc.cat_id,
                    gc.user_id,
                    gc.id
                FROM  '.$table_certificate.' gc
                WHERE gc.user_id = "'.$user_id.'" ';
        if (!is_null($cat_id) && $cat_id > 0) {
            $sql .= ' AND cat_id='.intval($cat_id);
        }

        $rs = Database::query($sql);
        $list = [];
        while ($row = Database::fetch_array($rs)) {
            $list[] = $row;
        }

        return $list;
    }

    /**
     * @param int    $user_id
     * @param string $course_code
     * @param int    $sessionId
     * @param bool   $is_preview
     * @param bool   $hide_print_button
     *
     * @return array
     */
    public static function get_user_certificate_content(
        $user_id,
        $course_code,
        $sessionId,
        $is_preview = false,
        $hide_print_button = false
    ) {
        // Generate document HTML
        $content_html = DocumentManager::replace_user_info_into_html(
            $user_id,
            api_get_course_info($course_code),
            $sessionId,
            $is_preview
        );

        $new_content_html = isset($content_html['content']) ? $content_html['content'] : null;
        $variables = isset($content_html['variables']) ? $content_html['variables'] : null;
        $path_image = api_get_path(WEB_COURSE_PATH).api_get_course_path($course_code).'/document/images/gallery';
        $new_content_html = str_replace('../images/gallery', $path_image, $new_content_html);

        $path_image_in_default_course = api_get_path(WEB_CODE_PATH).'default_course_document';
        $new_content_html = str_replace('/main/default_course_document', $path_image_in_default_course, $new_content_html);
        $new_content_html = str_replace(SYS_CODE_PATH.'img/', api_get_path(WEB_IMG_PATH), $new_content_html);

        //add print header
        if (!$hide_print_button) {
            $print = '<style>#print_div {
                padding:4px;border: 0 none;position: absolute;top: 0px;right: 0px;
            }
            @media print {
                #print_div  {
                    display: none !important;
                }
            }
            </style>';

            $print .= Display::div(
                Display::url(
                    Display::return_icon('printmgr.gif', get_lang('Print')),
                    'javascript:void()',
                    ['onclick' => 'window.print();']
                ),
                ['id' => 'print_div']
            );
            $print .= '</html>';
            $new_content_html = str_replace('</html>', $print, $new_content_html);
        }

        return [
            'content' => $new_content_html,
            'variables' => $variables,
        ];
    }

    /**
     * @param null $course_code
     * @param int  $gradebook_model_id
     *
     * @return mixed
     */
    public static function create_default_course_gradebook(
        $course_code = null,
        $gradebook_model_id = 0
    ) {
        if (api_is_allowed_to_edit(true, true)) {
            if (!isset($course_code) || empty($course_code)) {
                $course_code = api_get_course_id();
            }
            $session_id = api_get_session_id();
            $courseInfo = api_get_course_info($course_code);

            $t = Database::get_main_table(TABLE_MAIN_GRADEBOOK_CATEGORY);
            $sql = "SELECT * FROM $t 
                    WHERE c_id = '".$courseInfo['real_id']."' ";
            if (!empty($session_id)) {
                $sql .= " AND session_id = ".$session_id;
            } else {
                $sql .= ' AND (session_id IS NULL OR session_id = 0) ';
            }
            $sql .= ' ORDER BY id ';
            $res = Database::query($sql);
            if (Database::num_rows($res) < 1) {
                //there is no unique category for this course+session combination,
                $cat = new Category();
                if (!empty($session_id)) {
                    $my_session_id = api_get_session_id();
                    $s_name = api_get_session_name($my_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(api_get_user_id());
                $cat->set_parent_id(0);
                $default_weight_setting = api_get_setting('gradebook_default_weight');
                $default_weight = isset($default_weight_setting) && !empty($default_weight_setting) ? $default_weight_setting : 100;
                $cat->set_weight($default_weight);
                $cat->set_grade_model_id($gradebook_model_id);
                $cat->set_certificate_min_score(75);

                $cat->set_visible(0);
                $cat->add();
                $category_id = $cat->get_id();
                unset($cat);
            } else {
                $row = Database::fetch_array($res);
                $category_id = $row['id'];
            }

            return $category_id;
        }

        return false;
    }

    /**
     * @param FormValidator $form
     */
    public static function load_gradebook_select_in_tool($form)
    {
        $course_code = api_get_course_id();
        $session_id = api_get_session_id();

        self::create_default_course_gradebook();

        // Cat list
        $all_categories = Category::load(
            null,
            null,
            $course_code,
            null,
            null,
            $session_id,
            false
        );
        $select_gradebook = $form->addElement(
            'select',
            'category_id',
            get_lang('Select assessment')
        );

        if (!empty($all_categories)) {
            foreach ($all_categories as $my_cat) {
                if ($my_cat->get_course_code() == api_get_course_id()) {
                    $grade_model_id = $my_cat->get_grade_model_id();
                    if (empty($grade_model_id)) {
                        if ($my_cat->get_parent_id() == 0) {
                            //$default_weight = $my_cat->get_weight();
                            $select_gradebook->addoption(get_lang('Default'), $my_cat->get_id());
                            $cats_added[] = $my_cat->get_id();
                        } else {
                            $select_gradebook->addoption($my_cat->get_name(), $my_cat->get_id());
                            $cats_added[] = $my_cat->get_id();
                        }
                    } else {
                        $select_gradebook->addoption(get_lang('Select'), 0);
                    }
                }
            }
        }
    }

    /**
     * @param FlatViewTable $flatviewtable
     * @param Category      $cat
     * @param $users
     * @param $alleval
     * @param $alllinks
     * @param array $params
     * @param null  $mainCourseCategory
     */
    public static function export_pdf_flatview(
        $flatviewtable,
        $cat,
        $users,
        $alleval,
        $alllinks,
        $params = [],
        $mainCourseCategory = null
    ) {
        // Getting data
        $printable_data = self::get_printable_data(
            $cat[0],
            $users,
            $alleval,
            $alllinks,
            $params,
            $mainCourseCategory
        );

        // HTML report creation first
        $course_code = trim($cat[0]->get_course_code());

        $displayscore = ScoreDisplay::instance();
        $customDisplays = $displayscore->get_custom_score_display_settings();

        $total = [];
        if (is_array($customDisplays) && count(($customDisplays))) {
            foreach ($customDisplays as $custom) {
                $total[$custom['display']] = 0;
            }
            $user_results = $flatviewtable->datagen->get_data_to_graph2(false);
            foreach ($user_results as $user_result) {
                $item = $user_result[count($user_result) - 1];
                $customTag = isset($item[1]) ? strip_tags($item[1]) : '';
                $total[$customTag]++;
            }
        }

        $parent_id = $cat[0]->get_parent_id();
        if (isset($cat[0]) && isset($parent_id)) {
            if ($parent_id == 0) {
                $grade_model_id = $cat[0]->get_grade_model_id();
            } else {
                $parent_cat = Category::load($parent_id);
                $grade_model_id = $parent_cat[0]->get_grade_model_id();
            }
        }

        $use_grade_model = true;
        if (empty($grade_model_id) || $grade_model_id == -1) {
            $use_grade_model = false;
        }

        if ($use_grade_model) {
            if ($parent_id == 0) {
                $title = api_strtoupper(get_lang('Average')).'<br />'.get_lang('Detailed');
            } else {
                $title = api_strtoupper(get_lang('Average')).'<br />'.$cat[0]->get_description().' - ('.$cat[0]->get_name().')';
            }
        } else {
            if ($parent_id == 0) {
                $title = api_strtoupper(get_lang('Average')).'<br />'.get_lang('Detailed');
            } else {
                $title = api_strtoupper(get_lang('Average'));
            }
        }

        $columns = count($printable_data[0]);
        $has_data = is_array($printable_data[1]) && count($printable_data[1]) > 0;

        $table = new HTML_Table(['class' => 'data_table']);
        $row = 0;
        $column = 0;
        $table->setHeaderContents($row, $column, get_lang('N°'));
        $column++;
        foreach ($printable_data[0] as $printable_data_cell) {
            if (!is_array($printable_data_cell)) {
                $printable_data_cell = strip_tags($printable_data_cell);
            }
            $table->setHeaderContents($row, $column, $printable_data_cell);
            $column++;
        }
        $row++;

        if ($has_data) {
            $counter = 1;
            foreach ($printable_data[1] as &$printable_data_row) {
                $column = 0;
                $table->setCellContents($row, $column, $counter);
                $table->updateCellAttributes($row, $column, 'align="center"');
                $column++;
                $counter++;

                foreach ($printable_data_row as $key => &$printable_data_cell) {
                    $attributes = [];
                    $attributes['align'] = 'center';
                    $attributes['style'] = null;

                    if ($key === 'name') {
                        $attributes['align'] = 'left';
                    }
                    if ($key === 'total') {
                        $attributes['style'] = 'font-weight:bold';
                    }
                    $table->setCellContents($row, $column, $printable_data_cell);
                    $table->updateCellAttributes($row, $column, $attributes);
                    $column++;
                }
                $table->updateRowAttributes($row, $row % 2 ? 'class="row_even"' : 'class="row_odd"', true);
                $row++;
            }
        } else {
            $column = 0;
            $table->setCellContents($row, $column, get_lang('No results found'));
            $table->updateCellAttributes($row, $column, 'colspan="'.$columns.'" align="center" class="row_odd"');
        }

        $pdfParams = [
            'filename' => get_lang('List View').'_'.api_get_local_time(),
            'pdf_title' => $title,
            'course_code' => $course_code,
            'add_signatures' => ['Drh', 'Teacher', 'Date'],
        ];

        $page_format = $params['orientation'] === 'landscape' ? 'A4-L' : 'A4';
        ob_start();
        $pdf = new PDF($page_format, $page_format, $pdfParams);
        $pdf->html_to_pdf_with_template($flatviewtable->return_table(), false, false, true);
        $content = ob_get_contents();
        ob_end_clean();
        echo $content;
        exit;
    }

    /**
     * @param string[] $list_values
     *
     * @return string
     */
    public static function score_badges($list_values)
    {
        $counter = 1;
        $badges = [];
        foreach ($list_values as $value) {
            $class = 'warning';
            if ($counter == 1) {
                $class = 'success';
            }
            $counter++;
            $badges[] = Display::badge($value, $class);
        }

        return Display::badge_group($badges);
    }

    /**
     * returns users within a course given by param.
     *
     * @param string $courseCode
     *
     * @deprecated use CourseManager
     *
     * @return array
     */
    public static function get_users_in_course($courseCode)
    {
        $tbl_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
        $tbl_session_course_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
        $tbl_user = Database::get_main_table(TABLE_MAIN_USER);
        $order_clause = api_sort_by_first_name() ? ' ORDER BY firstname, lastname ASC' : ' ORDER BY lastname, firstname ASC';

        $current_session = api_get_session_id();
        $courseCode = Database::escape_string($courseCode);
        $courseInfo = api_get_course_info($courseCode);
        $courseId = $courseInfo['real_id'];

        if (!empty($current_session)) {
            $sql = "SELECT user.user_id, user.username, lastname, firstname, official_code
                    FROM $tbl_session_course_user as scru 
                    INNER JOIN $tbl_user as user
                    ON (scru.user_id = user.user_id)
                    WHERE                        
                        scru.status = 0 AND
                        scru.c_id='$courseId' AND
                        session_id ='$current_session'
                    $order_clause
                    ";
        } else {
            $sql = 'SELECT user.user_id, user.username, lastname, firstname, official_code
                    FROM '.$tbl_course_user.' as course_rel_user
                    INNER JOIN '.$tbl_user.' as user
                    ON (course_rel_user.user_id = user.id)
                    WHERE
                        course_rel_user.status = '.STUDENT.' AND
                        course_rel_user.c_id = "'.$courseId.'" '.
                    $order_clause;
        }

        $result = Database::query($sql);

        return self::get_user_array_from_sql_result($result);
    }

    /**
     * @param Doctrine\DBAL\Driver\Statement|null $result
     *
     * @return array
     */
    public static function get_user_array_from_sql_result($result)
    {
        $a_students = [];
        while ($user = Database::fetch_array($result)) {
            if (!array_key_exists($user['user_id'], $a_students)) {
                $a_current_student = [];
                $a_current_student[] = $user['user_id'];
                $a_current_student[] = $user['username'];
                $a_current_student[] = $user['lastname'];
                $a_current_student[] = $user['firstname'];
                $a_current_student[] = $user['official_code'];
                $a_students['STUD'.$user['user_id']] = $a_current_student;
            }
        }

        return $a_students;
    }

    /**
     * @param array $evals
     * @param array $links
     *
     * @return array
     */
    public static function get_all_users($evals = [], $links = [])
    {
        $coursecodes = [];
        // By default add all user in course
        $coursecodes[api_get_course_id()] = '1';
        $users = self::get_users_in_course(api_get_course_id());

        foreach ($evals as $eval) {
            $coursecode = $eval->get_course_code();
            // evaluation in course
            if (isset($coursecode) && !empty($coursecode)) {
                if (!array_key_exists($coursecode, $coursecodes)) {
                    $coursecodes[$coursecode] = '1';
                    $users = array_merge($users, self::get_users_in_course($coursecode));
                }
            } else {
                // course independent evaluation
                $tbl_user = Database::get_main_table(TABLE_MAIN_USER);
                $tbl_res = Database::get_main_table(TABLE_MAIN_GRADEBOOK_RESULT);

                $sql = 'SELECT user.user_id, lastname, firstname, user.official_code
                        FROM '.$tbl_res.' as res, '.$tbl_user.' as user
                        WHERE
                            res.evaluation_id = '.intval($eval->get_id()).' AND
                            res.user_id = user.user_id
                        ';
                $sql .= ' ORDER BY lastname, firstname';
                if (api_is_western_name_order()) {
                    $sql .= ' ORDER BY firstname, lastname';
                }

                $result = Database::query($sql);
                $users = array_merge(
                    $users,
                    self::get_user_array_from_sql_result($result)
                );
            }
        }

        foreach ($links as $link) {
            // links are always in a course
            $coursecode = $link->get_course_code();
            if (!array_key_exists($coursecode, $coursecodes)) {
                $coursecodes[$coursecode] = '1';
                $users = array_merge(
                    $users,
                    self::get_users_in_course($coursecode)
                );
            }
        }

        return $users;
    }

    /**
     * Search students matching a given last name and/or first name.
     *
     * @author Bert Steppé
     */
    public static function find_students($mask = '')
    {
        // students shouldn't be here // don't search if mask empty
        if (!api_is_allowed_to_edit() || empty($mask)) {
            return null;
        }
        $mask = Database::escape_string($mask);
        $tbl_user = Database::get_main_table(TABLE_MAIN_USER);
        $tbl_cru = Database::get_main_table(TABLE_MAIN_COURSE_USER);
        $sql = 'SELECT DISTINCT user.user_id, user.lastname, user.firstname, user.email, user.official_code
                FROM '.$tbl_user.' user';
        if (!api_is_platform_admin()) {
            $sql .= ', '.$tbl_cru.' cru';
        }

        $sql .= ' WHERE user.status = '.STUDENT;
        $sql .= ' AND (user.lastname LIKE '."'%".$mask."%'";
        $sql .= ' OR user.firstname LIKE '."'%".$mask."%')";

        if (!api_is_platform_admin()) {
            $sql .= ' AND user.user_id = cru.user_id AND
                      cru.relation_type <> '.COURSE_RELATION_TYPE_RRHH.' AND
                      cru.c_id in (
                            SELECT c_id FROM '.$tbl_cru.'
                            WHERE
                                user_id = '.api_get_user_id().' AND
                                status = '.COURSEMANAGER.'
                        )
                    ';
        }

        $sql .= ' ORDER BY lastname, firstname';
        if (api_is_western_name_order()) {
            $sql .= ' ORDER BY firstname, lastname';
        }

        $result = Database::query($sql);
        $users = Database::store_result($result);

        return $users;
    }

    /**
     * @param int   $linkId
     * @param float $weight
     */
    public static function updateLinkWeight($linkId, $name, $weight)
    {
        $linkId = (int) $linkId;
        $weight = api_float_val($weight);
        $course_id = api_get_course_int_id();

        AbstractLink::add_link_log($linkId, $name);
        $table_link = Database::get_main_table(TABLE_MAIN_GRADEBOOK_LINK);

        $em = Database::getManager();
        $tbl_forum_thread = Database::get_course_table(TABLE_FORUM_THREAD);
        $tbl_attendance = Database::get_course_table(TABLE_ATTENDANCE);

        $sql = 'UPDATE '.$table_link.' 
                SET weight = '."'".Database::escape_string($weight)."'".'
                WHERE id = '.$linkId;

        Database::query($sql);

        // Update weight for attendance
        $sql = 'SELECT ref_id FROM '.$table_link.'
                WHERE id = '.$linkId.' AND type='.LINK_ATTENDANCE;

        $rs_attendance = Database::query($sql);
        if (Database::num_rows($rs_attendance) > 0) {
            $row_attendance = Database::fetch_array($rs_attendance);
            $sql = 'UPDATE '.$tbl_attendance.' SET 
                    attendance_weight ='.api_float_val($weight).'
                    WHERE c_id = '.$course_id.' AND  id = '.intval($row_attendance['ref_id']);
            Database::query($sql);
        }
        // Update weight into forum thread
        $sql = 'UPDATE '.$tbl_forum_thread.' SET 
                thread_weight = '.api_float_val($weight).'
                WHERE
                    c_id = '.$course_id.' AND
                    thread_id = (
                        SELECT ref_id FROM '.$table_link.'
                        WHERE id='.$linkId.' AND type='.LINK_FORUM_THREAD.'
                    )
                ';
        Database::query($sql);
        //Update weight into student publication(work)
        $em
            ->createQuery('
                UPDATE ChamiloCourseBundle:CStudentPublication w
                SET w.weight = :final_weight
                WHERE w.cId = :course
                    AND w.id = (
                        SELECT l.refId FROM ChamiloCoreBundle:GradebookLink l
                        WHERE l.id = :link AND l.type = :type
                    )
            ')
            ->execute([
                'final_weight' => $weight,
                'course' => $course_id,
                'link' => $linkId,
                'type' => LINK_STUDENTPUBLICATION,
            ]);
    }

    /**
     * @param int   $id
     * @param float $weight
     */
    public static function updateEvaluationWeight($id, $weight)
    {
        $table_evaluation = Database::get_main_table(TABLE_MAIN_GRADEBOOK_EVALUATION);
        $id = (int) $id;
        $evaluation = new Evaluation();
        $evaluation->addEvaluationLog($id);
        $sql = 'UPDATE '.$table_evaluation.'
               SET weight = '."'".Database::escape_string($weight)."'".'
               WHERE id = '.$id;
        Database::query($sql);
    }

    /**
     * Get the achieved certificates for a user in courses.
     *
     * @param int  $userId                       The user id
     * @param bool $includeNonPublicCertificates Whether include the non-plublic certificates
     *
     * @return array
     */
    public static function getUserCertificatesInCourses(
        $userId,
        $includeNonPublicCertificates = true
    ) {
        $userId = (int) $userId;
        $courseList = [];
        $courses = CourseManager::get_courses_list_by_user_id($userId);

        foreach ($courses as $course) {
            if (!$includeNonPublicCertificates) {
                $allowPublicCertificates = api_get_course_setting('allow_public_certificates', $course);

                if (empty($allowPublicCertificates)) {
                    continue;
                }
            }

            $category = Category::load(null, null, $course['code']);

            if (empty($category)) {
                continue;
            }

            if (!isset($category[0])) {
                continue;
            }
            /** @var Category $category */
            $category = $category[0];

            if (empty($category->getGenerateCertificates())) {
                continue;
            }

            $categoryId = $category->get_id();
            $certificateInfo = self::get_certificate_by_user_id($categoryId, $userId);

            if (empty($certificateInfo)) {
                continue;
            }

            $courseInfo = api_get_course_info_by_id($course['real_id']);
            if (empty($courseInfo)) {
                continue;
            }

            $courseList[] = [
                'course' => $courseInfo['title'],
                'score' => $certificateInfo['score_certificate'],
                'date' => api_format_date($certificateInfo['created_at'], DATE_FORMAT_SHORT),
                'link' => api_get_path(WEB_PATH)."certificates/index.php?id={$certificateInfo['id']}",
                'pdf' => api_get_path(WEB_PATH)."certificates/index.php?id={$certificateInfo['id']}&user_id={$userId}&action=export",
            ];
        }

        return $courseList;
    }

    /**
     * Get the achieved certificates for a user in course sessions.
     *
     * @param int  $userId                       The user id
     * @param bool $includeNonPublicCertificates Whether include the non-public certificates
     *
     * @return array
     */
    public static function getUserCertificatesInSessions($userId, $includeNonPublicCertificates = true)
    {
        $userId = (int) $userId;
        $sessionList = [];
        $sessions = SessionManager::get_sessions_by_user($userId, true, true);

        foreach ($sessions as $session) {
            if (empty($session['courses'])) {
                continue;
            }
            $sessionCourses = SessionManager::get_course_list_by_session_id($session['session_id']);

            if (empty($sessionCourses)) {
                continue;
            }

            foreach ($sessionCourses as $course) {
                if (!$includeNonPublicCertificates) {
                    $allowPublicCertificates = api_get_course_setting('allow_public_certificates');

                    if (empty($allowPublicCertificates)) {
                        continue;
                    }
                }

                $category = Category::load(
                    null,
                    null,
                    $course['code'],
                    null,
                    null,
                    $session['session_id']
                );

                if (empty($category)) {
                    continue;
                }

                if (!isset($category[0])) {
                    continue;
                }

                /** @var Category $category */
                $category = $category[0];

                // Don't allow generate of certifications
                if (empty($category->getGenerateCertificates())) {
                    continue;
                }

                $categoryId = $category->get_id();
                $certificateInfo = self::get_certificate_by_user_id(
                    $categoryId,
                    $userId
                );

                if (empty($certificateInfo)) {
                    continue;
                }

                $sessionList[] = [
                    'session' => $session['session_name'],
                    'course' => $course['title'],
                    'score' => $certificateInfo['score_certificate'],
                    'date' => api_format_date($certificateInfo['created_at'], DATE_FORMAT_SHORT),
                    'link' => api_get_path(WEB_PATH)."certificates/index.php?id={$certificateInfo['id']}",
                ];
            }
        }

        return $sessionList;
    }

    /**
     * @param array $courseInfo
     * @param int   $userId
     * @param array $cats
     * @param bool  $saveToFile
     * @param bool  $saveToHtmlFile
     * @param array $studentList
     * @param PDF   $pdf
     *
     * @return string
     */
    public static function generateTable(
        $courseInfo,
        $userId,
        $cats,
        $saveToFile = false,
        $saveToHtmlFile = false,
        $studentList = [],
        $pdf = null
    ) {
        $userInfo = api_get_user_info($userId);
        $model = ExerciseLib::getCourseScoreModel();
        $cat = $cats[0];
        $allcat = $cats[0]->get_subcategories(
            $userId,
            api_get_course_id(),
            api_get_session_id()
        );
        $alleval = $cats[0]->get_evaluations($userId);
        $alllink = $cats[0]->get_links($userId);

        $loadStats = [];
        if (api_get_setting('gradebook_detailed_admin_view') === 'true') {
            $loadStats = [1, 2, 3];
        } else {
            if (api_get_configuration_value('gradebook_enable_best_score') !== false) {
                $loadStats = [2];
            }
        }

        $gradebooktable = new GradebookTable(
            $cat,
            $allcat,
            $alleval,
            $alllink,
            null,
            true,
            false,
            $userId,
            $studentList,
            $loadStats
        );

        $gradebooktable->userId = $userId;

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

        $graph = '';
        if (empty($model)) {
            $graph = $gradebooktable->getGraph();
        }
        $params = [
            'pdf_title' => sprintf(get_lang('Grades from course: %s'), $courseInfo['name']),
            'session_info' => '',
            'course_info' => '',
            'pdf_date' => '',
            'course_code' => api_get_course_id(),
            'student_info' => $userInfo,
            'show_grade_generated_date' => true,
            'show_real_course_teachers' => false,
            'show_teacher_as_myself' => false,
            'orientation' => 'P',
        ];

        if (empty($pdf)) {
            $pdf = new PDF('A4', $params['orientation'], $params);
        }

        $pdf->params['student_info'] = $userInfo;
        $file = api_get_path(SYS_ARCHIVE_PATH).uniqid().'.html';

        $content =
            $table.
            $graph.
            '<br />'.get_lang('Feedback').'<br />
            <textarea class="form-control" rows="5" cols="100">&nbsp;</textarea>';

        $result = $pdf->html_to_pdf_with_template(
            $content,
            $saveToFile,
            $saveToHtmlFile,
            true
        );

        if ($saveToHtmlFile) {
            return $result;
            file_put_contents($file, $result);

            return $file;
        }

        return $file;
    }
}
