openexam.php

<?php
    // This file is part of Moodle - https://moodle.org/
    //
    // Moodle is free software: you can redistribute it and/or modify
    // it under the terms of the GNU General Public License as published by
    // the Free Software Foundation, either version 3 of the License, or
    // (at your option) any later version.
    //
    // Moodle is distributed in the hope that it will be useful,
    // but WITHOUT ANY WARRANTY; without even the implied warranty of
    // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    // GNU General Public License for more details.
    //
    // You should have received a copy of the GNU General Public License
    // along with Moodle.  If not, see <https://www.gnu.org/licenses/>.

    /**
     * openexam.php - Used to login to the exam to let the teacher signin.
     *
     * @package    plagiarism_tomagrade
     * @subpackage plagiarism
     * @copyright  2021 Tomax ltd <roy@tomax.co.il>
     * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
     */

    require_once(dirname(dirname(__FILE__)) . '/../config.php');
    require_once($CFG->libdir . '/adminlib.php');
    require_once($CFG->libdir . '/plagiarismlib.php');
    require_once($CFG->dirroot . '/plagiarism/tomagrade/lib.php');
    require_once($CFG->dirroot . '/plagiarism/tomagrade/plagiarism_form.php');
    require_login();
    defined('MOODLE_INTERNAL') || die();
    global $DB, $CFG, $USER;

    if ($CFG->version < 2011120100) {
        $context = get_context_instance(CONTEXT_SYSTEM);
    } else {
        $context = context_system::instance();
    }

    if (!isset($_GET['cmid'])) {
        echo ("<script>alert('".get_string('tomagrade_contactAdmin', 'plagiarism_tomagrade').");</script>");
        echo ("<script>window.close();</script>");
    }
    if (!isset($_GET['studentid']) && !isset($_GET['groupid']) ) {
        echo ("<script>alert('".get_string('tomagrade_contactAdmin', 'plagiarism_tomagrade')."');</script>");
        echo ("<script>window.close();</script>");
    }

    $cmid = $_GET['cmid'];
    $config = get_config('plagiarism_tomagrade');

    $isexam = false;
    $matalainfo = tomagrade_get_instance_config($cmid);
    if (isset($matalainfo->idmatchontg) &&
    $matalainfo->idmatchontg != '0' &&
    $matalainfo->idmatchontg != '' &&
    is_null($matalainfo->idmatchontg) == false) {
        $isexam = true;
    }

    $connection = new tomagrade_connection;

    if ($isexam) {
        $studentidintg = plagiarism_plugin_tomagrade::get_taodat_zaot($_GET['studentid']);
    } else {
        if (!isset($_GET['groupid'])) {
            $studentid = $_GET['studentid'];
            $studentidintg = plagiarism_plugin_tomagrade::get_user_identifier($studentid);
        } else {
            $groupid = $_GET['groupid'];
            $studentidintg = tomagrade_connection::format_group_name($groupid);
        }
    }
    $json = $connection->teacher_login($USER->id);



    $url = "https://$config->tomagrade_server.tomagrade.com/TomaGrade/Server/php/SAMLLogin.php/" .
    $json["Token"] . "/" . $json["UserID"] . "?coursename=" . $matalainfo->examid;

    header("Location: $url");
    exit;
?>