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

use ChamiloSession as Session;

/**
 * Exercise submission
 * This script allows to run an exercise. According to the exercise type, questions
 * can be on an unique page, or one per page with a Next button.
 *
 * One exercise may contain different types of answers (unique or multiple selection,
 * matching, fill in blanks, free answer, hot-spot).
 *
 * Questions are selected randomly or not.
 *
 * When the user has answered all questions and clicks on the button "Ok",
 * it goes to exercise_result.php
 *
 * Notice : This script is also used to show a question before modifying it by
 * the administrator
 *
 * @package chamilo.exercise
 *
 * @author Olivier Brouckaert
 * @author Julio Montoya <gugli100@gmail.com>
 *            Fill in blank option added (2008)
 *            Cleaning exercises (2010),
 *            Adding hotspot delineation support (2011)
 *            Adding reminder + ajax support (2011)
 * Modified by hubert.borderiou (2011-10-21 question category)
 */
require_once __DIR__.'/../inc/global.inc.php';
$current_course_tool = TOOL_QUIZ;
$this_section = SECTION_COURSES;
$debug = false;

// Notice for unauthorized people.
api_protect_course_script(true);
$origin = api_get_origin();
$is_allowedToEdit = api_is_allowed_to_edit(null, true);
$courseId = api_get_course_int_id();
$sessionId = api_get_session_id();
$glossaryExtraTools = api_get_setting('show_glossary_in_extra_tools');

$showGlossary = in_array($glossaryExtraTools, ['true', 'exercise', 'exercise_and_lp']);
if ($origin == 'learnpath') {
    $showGlossary = in_array($glossaryExtraTools, ['true', 'lp', 'exercise_and_lp']);
}
if ($showGlossary) {
    $htmlHeadXtra[] = '<script type="text/javascript" src="'.api_get_path(WEB_CODE_PATH).'glossary/glossary.js.php?add_ready=1&'.api_get_cidreq().'"></script>';
    $htmlHeadXtra[] = api_get_js('jquery.highlight.js');
}

$js = '<script>'.api_get_language_translate_html().'</script>';
$htmlHeadXtra[] = $js;

//$htmlHeadXtra[] = api_get_js('jqueryui-touch-punch/jquery.ui.touch-punch.min.js');
//$htmlHeadXtra[] = api_get_js('jquery.jsPlumb.all.js');
//$htmlHeadXtra[] = api_get_js('d3/jquery.xcolor.js');

//This library is necessary for the time control feature
//tmlHeadXtra[] = api_get_css(api_get_path(WEB_LIBRARY_PATH).'javascript/epiclock/stylesheet/jquery.epiclock.css');
//$htmlHeadXtra[] = api_get_css(api_get_path(WEB_LIBRARY_PATH).'javascript/epiclock/renderers/minute/epiclock.minute.css');
//$htmlHeadXtra[] = api_get_js('epiclock/javascript/jquery.dateformat.min.js');
//$htmlHeadXtra[] = api_get_js('epiclock/javascript/jquery.epiclock.min.js');
//$htmlHeadXtra[] = api_get_js('epiclock/renderers/minute/epiclock.minute.js');
$htmlHeadXtra[] = api_get_build_js('exercise.js');
$htmlHeadXtra[] = '<link rel="stylesheet" href="'.api_get_path(WEB_LIBRARY_JS_PATH).'hotspot/css/hotspot.css">';
$htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_JS_PATH).'hotspot/js/hotspot.js"></script>';
$htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_JS_PATH).'annotation/js/annotation.js"></script>';
if (api_get_configuration_value('quiz_prevent_copy_paste')) {
    $htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_JS_PATH).'jquery.nocopypaste.js"></script>';
}

if (api_get_setting('enable_record_audio') === 'true') {
    $htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_JS_PATH).'rtc/RecordRTC.js"></script>';
    $htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_PATH).'wami-recorder/recorder.js"></script>';
    $htmlHeadXtra[] = '<script src="'.api_get_path(WEB_LIBRARY_PATH).'wami-recorder/gui.js"></script>';
    $htmlHeadXtra[] = '<script type="text/javascript" src="'.api_get_path(WEB_LIBRARY_PATH).'swfobject/swfobject.js"></script>';
    $htmlHeadXtra[] = api_get_js('record_audio/record_audio.js');
}

$template = new Template();

// General parameters passed via POST/GET
$learnpath_id = isset($_REQUEST['learnpath_id']) ? (int) $_REQUEST['learnpath_id'] : 0;
$learnpath_item_id = isset($_REQUEST['learnpath_item_id']) ? (int) $_REQUEST['learnpath_item_id'] : 0;
$learnpath_item_view_id = isset($_REQUEST['learnpath_item_view_id']) ? (int) $_REQUEST['learnpath_item_view_id'] : 0;

$reminder = isset($_REQUEST['reminder']) ? (int) $_REQUEST['reminder'] : 0;
$remind_question_id = isset($_REQUEST['remind_question_id']) ? (int) $_REQUEST['remind_question_id'] : 0;
$exerciseId = isset($_REQUEST['exerciseId']) ? (int) $_REQUEST['exerciseId'] : 0;
$formSent = isset($_REQUEST['formSent']) ? $_REQUEST['formSent'] : null;
$exerciseResult = isset($_REQUEST['exerciseResult']) ? $_REQUEST['exerciseResult'] : null;
$exerciseResultCoordinates = isset($_REQUEST['exerciseResultCoordinates']) ? $_REQUEST['exerciseResultCoordinates'] : null;
$choice = isset($_REQUEST['choice']) ? $_REQUEST['choice'] : null;
$choice = empty($choice) ? isset($_REQUEST['choice2']) ? $_REQUEST['choice2'] : null : null;

// From submit modal
$current_question = isset($_REQUEST['num']) ? (int) $_REQUEST['num'] : null;
$currentAnswer = isset($_REQUEST['num_answer']) ? (int) $_REQUEST['num_answer'] : null;
$logInfo = [
    'tool' => TOOL_QUIZ,
    'tool_id' => $exerciseId,
    'tool_id_detail' => 0,
    'action' => $learnpath_id,
    'action_details' => $learnpath_id,
];
Event::registerLog($logInfo);

$error = '';
$exercise_attempt_table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ATTEMPT);

/*  Teacher takes an exam and want to see a preview,
    we delete the objExercise from the session in order to get the latest
    changes in the exercise */
if (api_is_allowed_to_edit(null, true) &&
    isset($_GET['preview']) && $_GET['preview'] == 1
) {
    Session::erase('objExercise');
}

// 1. Loading the $objExercise variable
/** @var \Exercise $exerciseInSession */
$exerciseInSession = Session::read('objExercise');
if (!isset($exerciseInSession) || isset($exerciseInSession) && ($exerciseInSession->id != $_GET['exerciseId'])) {
    // Construction of Exercise
    $objExercise = new Exercise($courseId);
    Session::write('firstTime', true);
    if ($debug) {
        error_log('1. Setting the $objExercise variable');
    }
    Session::erase('questionList');

    // if the specified exercise doesn't exist or is disabled
    if (!$objExercise->read($exerciseId) ||
        (!$objExercise->selectStatus() && !$is_allowedToEdit && !in_array($origin, ['learnpath', 'embeddable']))
    ) {
        if ($debug) {
            error_log('1.1. Error while reading the exercise');
        }
        unset($objExercise);
        $error = get_lang('Test not found or not visible');
    } else {
        // Saves the object into the session
        Session::write('objExercise', $objExercise);
        if ($debug) {
            error_log('1.1. $exerciseInSession was unset - set now - end');
        }
    }
} else {
    Session::write('firstTime', false);
}
//2. Checking if $objExercise is set
/** @var |Exercise $objExercise */
if (!isset($objExercise) && isset($exerciseInSession)) {
    if ($debug) {
        error_log('2. Loading $objExercise from session');
    }
    $objExercise = $exerciseInSession;
}

//3. $objExercise is not set, then return to the exercise list
if (!is_object($objExercise)) {
    if ($debug) {
        error_log('3. $objExercise was not set, kill the script');
    }
    header('Location: exercise.php');
    exit;
}

// if the user has submitted the form
$exercise_title = $objExercise->selectTitle();
$exercise_sound = $objExercise->selectSound();

// If reminder ends we jump to the exercise_reminder
if ($objExercise->review_answers) {
    if ($remind_question_id == -1) {
        header('Location: '.api_get_path(WEB_CODE_PATH).
            'exercise/exercise_reminder.php?exerciseId='.$exerciseId.'&'.api_get_cidreq());
        exit;
    }
}

$template->assign('shuffle_answers', $objExercise->random_answers);
$templateName = $template->get_template('exercise/submit.js.tpl');
$htmlHeadXtra[] = $template->fetch($templateName);

$current_timestamp = time();
$myRemindList = [];

$time_control = false;
if ($objExercise->expired_time != 0) {
    $time_control = true;
}

// Generating the time control key for the user
$current_expired_time_key = ExerciseLib::get_time_control_key(
    $objExercise->id,
    $learnpath_id,
    $learnpath_item_id
);

Session::write('duration_time_previous', [$current_expired_time_key => $current_timestamp]);
$durationTime = Session::read('duration_time');
if (!empty($durationTime) && isset($durationTime[$current_expired_time_key])) {
    Session::write(
        'duration_time_previous',
        [$current_expired_time_key => $durationTime[$current_expired_time_key]]
    );
}
Session::write('duration_time', [$current_expired_time_key => $current_timestamp]);

if ($time_control) {
    // Get the expired time of the current exercise in track_e_exercises
    $total_seconds = $objExercise->expired_time * 60;
}

$show_clock = true;
$user_id = api_get_user_id();
if ($objExercise->selectAttempts() > 0) {
    $messageReachedMax = Display::return_message(
        sprintf(get_lang('You cannot take test <b>%s</b> because you have already reached the maximum of %s attempts.'), $exercise_title, $objExercise->selectAttempts()),
        'warning',
        false
    );

    $attempt_html = '';
    $attempt_count = Event::get_attempt_count(
        $user_id,
        $exerciseId,
        $learnpath_id,
        $learnpath_item_id,
        $learnpath_item_view_id
    );

    if ($attempt_count >= $objExercise->selectAttempts()) {
        $show_clock = false;
        if (!api_is_allowed_to_edit(null, true)) {
            if ($objExercise->results_disabled == 0 && !in_array($origin, ['learnpath', 'embeddable'])) {
                // Showing latest attempt according with task BT#1628
                $exercise_stat_info = Event::getExerciseResultsByUser(
                    $user_id,
                    $exerciseId,
                    api_get_course_id(),
                    api_get_session_id()
                );

                if (!empty($exercise_stat_info)) {
                    $isQuestionsLimitReached = ExerciseLib::isQuestionsLimitPerDayReached(
                        $user_id,
                        count($objExercise->get_validated_question_list()),
                        $courseId,
                        $sessionId
                    );

                    if ($isQuestionsLimitReached) {
                        $maxQuestionsAnswered = (int) api_get_course_setting('quiz_question_limit_per_day');

                        Display::addFlash(
                            Display::return_message(
                                sprintf(get_lang('Sorry, you have reached the maximum number of questions (%s) for the day. Please try again tomorrow.'), $maxQuestionsAnswered),
                                'warning',
                                false
                            )
                        );

                        if (in_array($origin, ['learnpath', 'embeddable'])) {
                            Display::display_reduced_header();
                            Display::display_reduced_footer();
                        } else {
                            Display::display_header(get_lang('Tests'));
                            Display::display_footer();
                        }

                        exit;
                    }

                    $max_exe_id = max(array_keys($exercise_stat_info));
                    $last_attempt_info = $exercise_stat_info[$max_exe_id];
                    $attempt_html .= Display::div(
                        get_lang('Date').': '.api_get_local_time($last_attempt_info['exe_date']),
                        ['id' => '']
                    );

                    $attempt_html .= $messageReachedMax;

                    if (!empty($last_attempt_info['question_list'])) {
                        foreach ($last_attempt_info['question_list'] as $questions) {
                            foreach ($questions as $question_data) {
                                $question_id = $question_data['question_id'];
                                $marks = $question_data['marks'];

                                $question_info = Question::read($question_id);
                                $attempt_html .= Display::div(
                                    $question_info->question,
                                    ['class' => 'question_title']
                                );
                                $attempt_html .= Display::div(
                                    get_lang('Score').' '.$marks,
                                    ['id' => 'question_question_titlescore']
                                );
                            }
                        }
                    }
                    $score = ExerciseLib::show_score(
                        $last_attempt_info['score'],
                        $last_attempt_info['max_score']
                    );
                    $attempt_html .= Display::div(
                        get_lang('Score for the test').' '.$score,
                        ['id' => 'question_score']
                    );
                } else {
                    $attempt_html .= $messageReachedMax;
                }
            } else {
                $attempt_html .= $messageReachedMax;
            }
        } else {
            $attempt_html .= $messageReachedMax;
        }

        if (in_array($origin, ['learnpath', 'embeddable'])) {
            Display::display_reduced_header();
        } else {
            Display::display_header(get_lang('Tests'));
        }

        echo $attempt_html;

        if (!in_array($origin, ['learnpath', 'embeddable'])) {
            Display::display_footer();
        }
        exit;
    }
}

/* 5. Getting user exercise info (if the user took the exam before)
   generating exe_id */
$exercise_stat_info = $objExercise->get_stat_track_exercise_info(
    $learnpath_id,
    $learnpath_item_id,
    $learnpath_item_view_id
);

// Fix in order to get the correct question list.
$questionListUncompressed = $objExercise->getQuestionListWithMediasUncompressed();
Session::write('question_list_uncompressed', $questionListUncompressed);
$clock_expired_time = null;
if (empty($exercise_stat_info)) {
    $disable = api_get_configuration_value('exercises_disable_new_attempts');
    if ($disable) {
        api_not_allowed(true);
    }

    if ($debug) {
        error_log('5  $exercise_stat_info is empty ');
    }
    $total_weight = 0;
    $questionList = $objExercise->get_validated_question_list();
    foreach ($questionListUncompressed as $question_id) {
        $objQuestionTmp = Question::read($question_id);
        $total_weight += floatval($objQuestionTmp->weighting);
    }

    if ($time_control) {
        $expected_time = $current_timestamp + $total_seconds;
        if ($debug) {
            error_log('5.1. $current_timestamp '.$current_timestamp);
        }
        if ($debug) {
            error_log('5.2. $expected_time '.$expected_time);
        }

        $clock_expired_time = api_get_utc_datetime($expected_time);
        if ($debug) {
            error_log('5.3. $expected_time '.$clock_expired_time);
        }

        //Sessions  that contain the expired time
        $_SESSION['expired_time'][$current_expired_time_key] = $clock_expired_time;
        if ($debug) {
            error_log(
                '5.4. Setting the $_SESSION[expired_time]: '.$_SESSION['expired_time'][$current_expired_time_key]
            );
        }
    }

    $exe_id = $objExercise->save_stat_track_exercise_info(
        $clock_expired_time,
        $learnpath_id,
        $learnpath_item_id,
        $learnpath_item_view_id,
        $questionList,
        $total_weight
    );
    $exercise_stat_info = $objExercise->get_stat_track_exercise_info(
        $learnpath_id,
        $learnpath_item_id,
        $learnpath_item_view_id
    );

    // Send notification at the start
    if (!api_is_allowed_to_edit(null, true) &&
        !api_is_excluded_user_type()
    ) {
        $objExercise->send_mail_notification_for_exam(
            'start',
            [],
            $origin,
            $exe_id
        );
    }
    if ($debug) {
        error_log("5.5  exercise_stat_info[] exists getting exe_id $exe_id");
    }
} else {
    $exe_id = $exercise_stat_info['exe_id'];
    // Remember last question id position.
    $isFirstTime = Session::read('firstTime');

    if ($isFirstTime && $objExercise->type == ONE_PER_PAGE) {
        $resolvedQuestions = Event::getAllExerciseEventByExeId($exe_id);
        if (!empty($resolvedQuestions) &&
            !empty($exercise_stat_info['data_tracking'])
        ) {
            $last = current(end($resolvedQuestions));
            $attemptQuestionList = explode(',', $exercise_stat_info['data_tracking']);
            $count = 1;
            foreach ($attemptQuestionList as $question) {
                if ($last['question_id'] == $question) {
                    break;
                }
                $count++;
            }
            $current_question = $count;
        }
    }

    if ($debug) {
        error_log("5  exercise_stat_info[] exists getting exe_id $exe_id ");
    }
}

$saveDurationUrl = api_get_path(WEB_AJAX_PATH).'exercise.ajax.php?a=update_duration&exe_id='.$exe_id.'&'.api_get_cidreq();
$questionListInSession = Session::read('questionList');

if (!isset($questionListInSession)) {
    // Selects the list of question ID
    $questionList = $objExercise->getQuestionList();

    // Media questions.
    $media_is_activated = $objExercise->mediaIsActivated();

    // Getting order from random
    if ($media_is_activated == false &&
        (
            $objExercise->isRandom() ||
            !empty($objExercise->getRandomByCategory()) ||
            $objExercise->getQuestionSelectionType() > 2
        ) &&
        isset($exercise_stat_info) &&
        !empty($exercise_stat_info['data_tracking'])
    ) {
        $questionList = explode(',', $exercise_stat_info['data_tracking']);
    }
    Session::write('questionList', $questionList);

    if ($debug > 0) {
        error_log('$_SESSION[questionList] was set');
    }
} else {
    if (isset($objExercise) && isset($exerciseInSession)) {
        $questionList = Session::read('questionList');
    }
}
// Array to check in order to block the chat
ExerciseLib::create_chat_exercise_session($exe_id);

if ($debug) {
    error_log(
        '6. $objExercise->get_stat_track_exercise_info function called::  '.print_r(
            $exercise_stat_info,
            1
        )
    );
}

if (!empty($exercise_stat_info['questions_to_check'])) {
    $myRemindList = $exercise_stat_info['questions_to_check'];
    $myRemindList = explode(',', $myRemindList);
    $myRemindList = array_filter($myRemindList);
}

$params = "exe_id=$exe_id&exerciseId=$exerciseId&learnpath_id=$learnpath_id&learnpath_item_id=$learnpath_item_id&learnpath_item_view_id=$learnpath_item_view_id&".api_get_cidreq().'&reminder='.$reminder;
if ($debug) {
    error_log("6.1 params: ->  $params");
}

if ($reminder == 2 && empty($myRemindList)) {
    if ($debug) {
        error_log("6.2 calling the exercise_reminder.php ");
    }
    header('Location: exercise_reminder.php?'.$params);
    exit;
}

/*
 * 7. Loading Time control parameters
 * If the expired time is major that zero(0) then the expired time is compute on this time.
 */
if ($time_control) {
    if ($debug) {
        error_log('7.1. Time control is enabled');
        error_log('7.2. $current_expired_time_key  '.$current_expired_time_key);
        error_log(
            '7.3. $_SESSION[expired_time][$current_expired_time_key] '.
            $_SESSION['expired_time'][$current_expired_time_key]
        );
    }

    if (!isset($_SESSION['expired_time'][$current_expired_time_key])) {
        //Timer - Get expired_time for a student
        if (!empty($exercise_stat_info)) {
            $expired_time_of_this_attempt = $exercise_stat_info['expired_time_control'];
            if ($debug) {
                error_log('7.4 Seems that the session ends and the user want to retake the exam');
                error_log('7.5 $expired_time_of_this_attempt: '.$expired_time_of_this_attempt);
            }
            // Get the last attempt of an exercise
            $last_attempt_date = Event::getLastAttemptDateOfExercise($exercise_stat_info['exe_id']);

            /* This means that the user enters the exam but do not answer the
               first question we get the date from the track_e_exercises not from
               the track_et_attempt see #2069 */
            if (empty($last_attempt_date)) {
                $diff = $current_timestamp - api_strtotime($exercise_stat_info['start_date'], 'UTC');
                $last_attempt_date = api_get_utc_datetime(
                    api_strtotime($exercise_stat_info['start_date'], 'UTC') + $diff
                );
            } else {
                //Recalculate the time control due #2069
                $diff = $current_timestamp - api_strtotime($last_attempt_date, 'UTC');
                $last_attempt_date = api_get_utc_datetime(api_strtotime($last_attempt_date, 'UTC') + $diff);
            }

            //New expired time - it is due to the possible closure of session
            $new_expired_time_in_seconds = api_strtotime($expired_time_of_this_attempt, 'UTC') - api_strtotime($last_attempt_date, 'UTC');
            $expected_time = $current_timestamp + $new_expired_time_in_seconds;
            $clock_expired_time = api_get_utc_datetime($expected_time);

            // First we update the attempt to today
            /* How the expired time is changed into "track_e_exercises" table,
               then the last attempt for this student should be changed too */
            $sql = "UPDATE $exercise_attempt_table SET
                      tms = '".api_get_utc_datetime()."'
                    WHERE
                        exe_id = '".$exercise_stat_info['exe_id']."' AND
                        tms = '".$last_attempt_date."' ";
            Database::query($sql);

            // Sessions that contain the expired time
            $_SESSION['expired_time'][$current_expired_time_key] = $clock_expired_time;

            if ($debug) {
                error_log('7.6. $last_attempt_date: '.$last_attempt_date);
                error_log('7.7. $new_expired_time_in_seconds: '.$new_expired_time_in_seconds);
                error_log('7.8. $expected_time1: '.$expected_time);
                error_log('7.9. $clock_expired_time: '.$clock_expired_time);
                error_log('7.10. $sql: '.$sql);
                error_log('7.11. Setting the $_SESSION[expired_time]: '.$_SESSION['expired_time'][$current_expired_time_key]);
            }
        }
    } else {
        $clock_expired_time = $_SESSION['expired_time'][$current_expired_time_key];
    }
}

// Get time left for expiring time
$time_left = api_strtotime($clock_expired_time, 'UTC') - time();

/*
 * The time control feature is enable here - this feature is enable for a jquery plugin called epiclock
 * for more details of how it works see this link : http://eric.garside.name/docs.html?p=epiclock
 */
if ($time_control) { //Sends the exercise form when the expired time is finished
    $htmlHeadXtra[] = $objExercise->showTimeControlJS($time_left);
}

//in LP's is enabled the "remember question" feature?
if (!isset($_SESSION['questionList'])) {
    // selects the list of question ID
    $questionList = $objExercise->get_validated_question_list();
    if ($objExercise->isRandom() && !empty($exercise_stat_info['data_tracking'])) {
        $questionList = explode(',', $exercise_stat_info['data_tracking']);
    }
    Session::write('questionList', $questionList);
} else {
    if (isset($objExercise) && isset($_SESSION['objExercise'])) {
        $questionList = Session::read('questionList');
    }
}

if ($debug) {
    error_log('8. Question list loaded '.print_r($questionList, 1));
}

//Real question count
$question_count = 0;
if (!empty($questionList)) {
    $question_count = count($questionList);
}

if ($current_question > $question_count) {
    // If time control then don't change the current question, otherwise there will be a loop.
    // @todo
    if ($time_control == false) {
        $current_question = 0;
    }
}

if ($formSent && isset($_POST)) {
    if ($debug) {
        error_log('9. $formSent was set');
    }

    // Initializing
    if (!is_array($exerciseResult)) {
        $exerciseResult = [];
        $exerciseResultCoordinates = [];
    }

    //Only for hotspot
    if (!isset($choice) && isset($_REQUEST['hidden_hotspot_id'])) {
        $hotspot_id = (int) $_REQUEST['hidden_hotspot_id'];
        $choice = [$hotspot_id => ''];
    }

    // if the user has answered at least one question
    if (is_array($choice)) {
        if ($debug) {
            error_log('9.1. $choice is an array '.print_r($choice, 1));
        }
        // Also store hotspot spots in the session ($exerciseResultCoordinates
        // will be stored in the session at the end of this script)
        if (isset($_POST['hotspot'])) {
            $exerciseResultCoordinates = $_POST['hotspot'];
            if ($debug) {
                error_log('9.2. $_POST[hotspot] data '.print_r($exerciseResultCoordinates, 1));
            }
        }
        if ($objExercise->type == ALL_ON_ONE_PAGE) {
            // $exerciseResult receives the content of the form.
            // Each choice of the student is stored into the array $choice
            $exerciseResult = $choice;
        } else {
            // gets the question ID from $choice. It is the key of the array
            list($key) = array_keys($choice);
            // if the user didn't already answer this question
            if (!isset($exerciseResult[$key])) {
                // stores the user answer into the array
                $exerciseResult[$key] = $choice[$key];
                //saving each question
                if (!in_array($objExercise->getFeedbackType(), [EXERCISE_FEEDBACK_TYPE_DIRECT, EXERCISE_FEEDBACK_TYPE_POPUP])) {
                    $nro_question = $current_question; // - 1;
                    $questionId = $key;
                    // gets the student choice for this question
                    $choice = $exerciseResult[$questionId];
                    if (isset($exe_id)) {
                        // Manage the question and answer attempts
                        if ($debug) {
                            error_log('8.3. manage_answer exe_id: '.$exe_id.' - $questionId: '.$questionId.' Choice'.print_r($choice, 1));
                        }
                        $objExercise->manage_answer(
                            $exe_id,
                            $questionId,
                            $choice,
                            'exercise_show',
                            $exerciseResultCoordinates,
                            true,
                            false,
                            false,
                            $objExercise->propagate_neg,
                            []
                        );
                    }
                    //END of saving and qualifying
                }
            }
        }
        if ($debug) {
            error_log('9.3.  $choice is an array - end');
            error_log('9.4.  $exerciseResult '.print_r($exerciseResult, 1));
        }
    }

    // the script "exercise_result.php" will take the variable $exerciseResult from the session
    Session::write('exerciseResult', $exerciseResult);
    Session::write('exerciseResultCoordinates', $exerciseResultCoordinates);

    // if all questions on one page OR if it is the last question (only for an exercise with one question per page)
    if ($objExercise->type == ALL_ON_ONE_PAGE || $current_question >= $question_count) {
        if (api_is_allowed_to_session_edit()) {
            // goes to the script that will show the result of the exercise
            if ($objExercise->type == ALL_ON_ONE_PAGE) {
                if ($debug) {
                    error_log('10. Exercise ALL_ON_ONE_PAGE -> Redirecting to exercise_result.php');
                }
                //We check if the user attempts before sending to the exercise_result.php
                if ($objExercise->selectAttempts() > 0) {
                    $attempt_count = Event::get_attempt_count(
                        api_get_user_id(),
                        $exerciseId,
                        $learnpath_id,
                        $learnpath_item_id,
                        $learnpath_item_view_id
                    );
                    if ($attempt_count >= $objExercise->selectAttempts()) {
                        echo Display::return_message(
                            sprintf(get_lang('You cannot take test <b>%s</b> because you have already reached the maximum of %s attempts.'), $exercise_title, $objExercise->selectAttempts()),
                            'warning',
                            false
                        );
                        if (!in_array($origin, ['learnpath', 'embeddable'])) {
                            //so we are not in learnpath tool
                            echo '</div>'; //End glossary div
                            Display::display_footer();
                        } else {
                            echo '</body></html>';
                        }
                    }
                }
                header("Location: exercise_result.php?".api_get_cidreq()."&exe_id=$exe_id&learnpath_id=$learnpath_id&learnpath_item_id=$learnpath_item_id&learnpath_item_view_id=$learnpath_item_view_id");
                exit;
            } else {
                if ($debug) {
                    error_log('10. Redirecting to exercise_result.php');
                }
                header("Location: exercise_result.php?".api_get_cidreq()."&exe_id=$exe_id&learnpath_id=$learnpath_id&learnpath_item_id=$learnpath_item_id&learnpath_item_view_id=$learnpath_item_view_id");
                exit;
            }
        } else {
            if ($debug) {
                error_log('10. Redirecting to exercise_submit.php');
            }
            header("Location: exercise_submit.php?".api_get_cidreq()."&exerciseId=$exerciseId");
            exit;
        }
    }
    if ($debug) {
        error_log('11. $formSent was set - end');
    }
}

// If questionNum comes from POST and not from GET
$latestQuestionId = Event::getLatestQuestionIdFromAttempt($exe_id);

if (is_null($current_question)) {
    $current_question = 1;
    if ($latestQuestionId) {
        $current_question = $objExercise->getPositionInCompressedQuestionList($latestQuestionId);
    }
} else {
    $current_question++;
}

if ($question_count != 0) {
    if ($objExercise->type == ALL_ON_ONE_PAGE ||
        $current_question > $question_count
    ) {
        if (api_is_allowed_to_session_edit()) {
            // goes to the script that will show the result of the exercise
            if ($objExercise->type == ALL_ON_ONE_PAGE) {
                if ($debug) {
                    error_log('12. Exercise ALL_ON_ONE_PAGE -> Redirecting to exercise_result.php');
                }

                // We check if the user attempts before sending to the exercise_result.php
                if ($objExercise->selectAttempts() > 0) {
                    $attempt_count = Event::get_attempt_count(
                        api_get_user_id(),
                        $exerciseId,
                        $learnpath_id,
                        $learnpath_item_id,
                        $learnpath_item_view_id
                    );
                    if ($attempt_count >= $objExercise->selectAttempts()) {
                        Display::return_message(
                            sprintf(get_lang('You cannot take test <b>%s</b> because you have already reached the maximum of %s attempts.'), $exercise_title, $objExercise->selectAttempts()),
                            'warning',
                            false
                        );
                        if (!in_array($origin, ['learnpath', 'embeddable'])) {
                            //so we are not in learnpath tool
                            echo '</div>'; //End glossary div
                            Display::display_footer();
                        } else {
                            echo '</body></html>';
                        }
                        exit;
                    }
                }
            } else {
                if ($objExercise->review_answers) {
                    header('Location: exercise_reminder.php?'.$params);
                    exit;
                } else {
                    $certaintyQuestionPresent = false;
                    foreach ($questionList as $questionId) {
                        $question = Question::read($questionId);
                        if ($question->type == MULTIPLE_ANSWER_TRUE_FALSE_DEGREE_CERTAINTY) {
                            $certaintyQuestionPresent = true;
                            break;
                        }
                    }
                    if ($certaintyQuestionPresent) {
                        // Certainty grade question
                        // We send an email to the student before redirection to the result page
                        MultipleAnswerTrueFalseDegreeCertainty::sendQuestionCertaintyNotification(
                            $user_id, $objExercise, $exe_id
                        );
                    }

                    header("Location: exercise_result.php?"
                        .api_get_cidreq()
                        ."&exe_id=$exe_id&learnpath_id=$learnpath_id&learnpath_item_id="
                        .$learnpath_item_id
                        ."&learnpath_item_view_id=$learnpath_item_view_id"
                    );
                    exit;
                }
            }
        }
    }
} else {
    $error = get_lang('There are no questions for this exercise');
    // if we are in the case where user select random by category, but didn't choose the number of random question
    if ($objExercise->getRandomByCategory() > 0 && $objExercise->random <= 0) {
        $error .= '<br/>'.get_lang('Please select some random question');
    }
}

if (api_is_in_gradebook()) {
    $interbreadcrumb[] = [
        'url' => Category::getUrl(),
        'name' => get_lang('Assessments'),
    ];
}

$interbreadcrumb[] = [
    'url' => 'exercise.php?'.api_get_cidreq(),
    'name' => get_lang('Tests'),
];
$interbreadcrumb[] = ['url' => '#', 'name' => $objExercise->selectTitle(true)];

if (!in_array($origin, ['learnpath', 'embeddable'])) { //so we are not in learnpath tool
    if (!api_is_allowed_to_session_edit()) {
        Display::addFlash(
            Display::return_message(get_lang('The session is read only'), 'warning')
        );
    }

    Display::display_header(null, 'Tests');
} else {
    $htmlHeadXtra[] = "<style> body { background: none;} </style> ";
    Display::display_reduced_header();
    echo '<div style="height:10px">&nbsp;</div>';
}

$show_quiz_edition = $objExercise->added_in_lp();

// I'm in a preview mode
if (api_is_course_admin() && !in_array($origin, ['learnpath', 'embeddable'])) {
    echo '<div class="actions">';
    if ($show_quiz_edition == false) {
        echo '<a href="exercise_admin.php?'.api_get_cidreq().'&modifyExercise=yes&exerciseId='.$objExercise->id.'">'.
            Display::return_icon('settings.png', get_lang('Edit test name and settings'), '', ICON_SIZE_MEDIUM).'</a>';
    } else {
        echo '<a href="#">'.
            Display::return_icon('settings_na.png', get_lang('Edit test name and settings'), '', ICON_SIZE_MEDIUM).'</a>';
    }
    echo '</div>';
}

$is_visible_return = $objExercise->is_visible(
    $learnpath_id,
    $learnpath_item_id,
    $learnpath_item_view_id
);

if ($is_visible_return['value'] == false) {
    echo $is_visible_return['message'];
    if (!in_array($origin, ['learnpath', 'embeddable'])) {
        Display :: display_footer();
    }
    exit;
}

$exercise_timeover = false;
$limit_time_exists = (!empty($objExercise->start_time) || !empty($objExercise->end_time)) ? true : false;

if ($limit_time_exists) {
    $exercise_start_time = api_strtotime($objExercise->start_time, 'UTC');
    $exercise_end_time = api_strtotime($objExercise->end_time, 'UTC');
    $time_now = time();

    if (!empty($objExercise->start_time)) {
        $permission_to_start = (($time_now - $exercise_start_time) > 0) ? true : false;
    } else {
        $permission_to_start = true;
    }
    if ($_SERVER['REQUEST_METHOD'] != 'POST') {
        if (!empty($objExercise->end_time)) {
            $exercise_timeover = (($time_now - $exercise_end_time) > 0) ? true : false;
        }
    }

    if (!$permission_to_start || $exercise_timeover) {
        if (!api_is_allowed_to_edit(null, true)) {
            $message_warning = $permission_to_start ? get_lang('Time limit reached') : get_lang('The test did not start yet');
            echo Display::return_message(
                sprintf(
                    $message_warning,
                    $exercise_title,
                    $objExercise->selectAttempts()
                ),
                'warning'
            );
            if (!in_array($origin, ['learnpath', 'embeddable'])) {
                Display::display_footer();
            }
            exit;
        } else {
            $message_warning = $permission_to_start ? get_lang('Time limit reachedAdmin') : get_lang('The trainer did not allow the test to start yet');
            echo Display::return_message(
                sprintf(
                    $message_warning,
                    $exercise_title,
                    $objExercise->selectAttempts()
                ),
                'warning'
            );
        }
    }
}

// Blocking empty start times see BT#2800
global $_custom;
if (isset($_custom['exercises_hidden_when_no_start_date']) &&
    $_custom['exercises_hidden_when_no_start_date']
) {
    if (empty($objExercise->start_time)) {
        echo Display:: return_message(
            sprintf(
                get_lang('The test did not start yet'),
                $exercise_title,
                $objExercise->selectAttempts()
            ),
            'warning'
        );
        if (!in_array($origin, ['learnpath', 'embeddable'])) {
            Display::display_footer();
            exit;
        }
    }
}

// Timer control
if ($time_control) {
    echo $objExercise->returnTimeLeftDiv();
    echo '<div style="display:none" class="warning-message" id="expired-message-id">'.
        get_lang('The exercise time limit has expired').'</div>';
}

if (!in_array($origin, ['learnpath', 'embeddable'])) {
    echo '<div id="highlight-plugin" class="glossary-content">';
}

if ($reminder == 2) {
    if ($debug) {
        error_log(' $reminder == 2');
    }
    $data_tracking = $exercise_stat_info['data_tracking'];
    $data_tracking = explode(',', $data_tracking);
    $current_question = 1; //set by default the 1st question

    if (!empty($myRemindList)) {
        // Checking which questions we are going to call from the remind list
        for ($i = 0; $i < count($data_tracking); $i++) {
            for ($j = 0; $j < count($myRemindList); $j++) {
                if (!empty($remind_question_id)) {
                    if ($remind_question_id == $myRemindList[$j]) {
                        if ($remind_question_id == $data_tracking[$i]) {
                            if (isset($myRemindList[$j + 1])) {
                                $remind_question_id = $myRemindList[$j + 1];
                                $current_question = $i + 1;
                            } else {
                                // We end the remind list we go to the exercise_reminder.php please
                                $remind_question_id = -1;
                                $current_question = $i + 1; // last question
                            }
                            break 2;
                        }
                    }
                } else {
                    if ($myRemindList[$j] == $data_tracking[$i]) {
                        if (isset($myRemindList[$j + 1])) {
                            $remind_question_id = $myRemindList[$j + 1];
                            $current_question = $i + 1; // last question
                        } else {
                            // We end the remind list we go to the exercise_reminder.php please
                            $remind_question_id = -1;
                            $current_question = $i + 1; // last question
                        }
                        break 2;
                    }
                }
            }
        }
    } else {
        if ($objExercise->review_answers) {
            if ($debug) {
                error_log('. redirecting to exercise_reminder.php ');
            }
            header("Location: exercise_reminder.php?$params");
            exit;
        }
    }
}

if ($objExercise->review_answers) {
    $script_php = 'exercise_reminder.php';
} else {
    $script_php = 'exercise_result.php';
}

if (!empty($error)) {
    echo Display::return_message($error, 'error', false);
} else {
    if (!empty($exercise_sound)) {
        echo "<a 
            href=\"../document/download.php?doc_url=%2Faudio%2F".Security::remove_XSS($exercise_sound)."\" 
            target=\"_blank\">";
        echo "<img src=\"../img/sound.gif\" border=\"0\" align=\"absmiddle\" alt=", get_lang('Audio or video file')."\" /></a>";
    }
    // Get number of hotspot questions for javascript validation
    $number_of_hotspot_questions = 0;
    $onsubmit = '';
    $i = 0;
    if (!empty($questionList)) {
        foreach ($questionList as $questionId) {
            $i++;
            $objQuestionTmp = Question::read($questionId);
            // for sequential exercises

            if ($objExercise->type == ONE_PER_PAGE) {
                // if it is not the right question, goes to the next loop iteration
                if ($current_question != $i) {
                    continue;
                } else {
                    if ($objQuestionTmp->selectType() == HOT_SPOT ||
                        $objQuestionTmp->selectType() == HOT_SPOT_DELINEATION
                    ) {
                        $number_of_hotspot_questions++;
                    }
                    break;
                }
            } else {
                if ($objQuestionTmp->selectType() == HOT_SPOT ||
                    $objQuestionTmp->selectType() == HOT_SPOT_DELINEATION
                ) {
                    $number_of_hotspot_questions++;
                }
            }
        }
    }

    $saveIcon = Display::return_icon(
        'save.png',
        get_lang('Saved...'),
        [],
        ICON_SIZE_SMALL,
        false,
        true
    );

    echo '<script>
        function addExerciseEvent(elm, evType, fn, useCapture) {
            if (elm.addEventListener) {
                elm.addEventListener(evType, fn, useCapture);
                return;
            } else if (elm.attachEvent) {
                elm.attachEvent(\'on\' + evType, fn);
            } else{
                elm[\'on\'+evType] = fn;
            }            
            return;
        }
        
        var calledUpdateDuration = false;        
        function updateDuration() {
            if (calledUpdateDuration === false) {
                var saveDurationUrl = "'.$saveDurationUrl.'";
                // Logout of course just in case
                $.ajax({
                    async: false, 
                    url: saveDurationUrl,
                    success: function (data) {
                        calledUpdateDuration = true;
                        return;
                    }, 
                });
                return;
            }
        }
        
        $(function() {
            //This pre-load the save.png icon
            var saveImage = new Image();
            saveImage.src = "'.$saveIcon.'";

            // Block form submition on enter
            $(".block_on_enter").keypress(function(event) {
                return event.keyCode != 13;
            });
            
            $(".checkCalculatedQuestionOnEnter").keypress(function(event) {
                if (event.keyCode === 13) {
                    event.preventDefault();
                    var id = $(this).attr("id");
                    var parts = id.split("_");
                    var buttonId = "button_" + parts[1];
                    document.getElementById(buttonId).click();                    
                }
            });

            $(".main_question").mouseover(function() {
                //$(this).find(".exercise_save_now_button").show();
                //$(this).addClass("question_highlight");
            });

            $(".main_question").mouseout(function() {
                //$(this).find(".exercise_save_now_button").hide();
                $(this).removeClass("question_highlight");
            });

            $(".no_remind_highlight").hide();

            // if the users validates the form using return key, 
            // prevent form action and simulates click on validation button
            /*$("#exercise_form").submit(function(){
                $(".question-validate-btn").first().trigger("click");
                return false;
            });*/

            $("form#exercise_form").prepend($("#exercise-description"));
        
            $(\'button[name="previous_question_and_save"]\').on("touchstart click", function (e) {
                e.preventDefault();
                e.stopPropagation();    
                var
                    $this = $(this),
                    previousId = parseInt($this.data(\'prev\')) || 0,
                    questionId = parseInt($this.data(\'question\')) || 0;

                previous_question_and_save(previousId, questionId);
            });

            $(\'button[name="save_question_list"]\').on(\'touchstart click\', function (e) {
                e.preventDefault();
                e.stopPropagation();
                var $this = $(this);
                var questionList = $this.data(\'list\').split(",");

                save_question_list(questionList);
            });

            $(\'button[name="save_now"]\').on(\'touchstart click\', function (e) {
                e.preventDefault();
                e.stopPropagation();
                
                var
                    $this = $(this),
                    questionId = parseInt($this.data(\'question\')) || 0,
                    urlExtra = $this.data(\'url\') || null;

                save_now(questionId, urlExtra);
            });

            $(\'button[name="validate_all"]\').on(\'touchstart click\', function (e) {
                e.preventDefault();
                e.stopPropagation();
                
                validate_all();
            });
            
            // Save attempt duration
            addExerciseEvent(window, \'unload\', updateDuration , false);            
            addExerciseEvent(window, \'beforeunload\', updateDuration , false);                                    
        });

        function previous_question(question_num) {
            url = "exercise_submit.php?'.$params.'&num="+question_num;
            window.location = url;
        }

        function previous_question_and_save(previous_question_id, question_id_to_save) {
            url = "exercise_submit.php?'.$params.'&num="+previous_question_id;
            //Save the current question
            save_now(question_id_to_save, url);
        }

        function save_question_list(question_list) {
            $.each(question_list, function(key, question_id) {
                save_now(question_id, null, false);
            });

            var url = "";
            if ('.$reminder.' == 1 ) {
                url = "exercise_reminder.php?'.$params.'&num='.$current_question.'";
            } else if ('.$reminder.' == 2 ) {
                url = "exercise_submit.php?'.$params.'&num='.$current_question.'&remind_question_id='.$remind_question_id.'&reminder=2";
            } else {
                url = "exercise_submit.php?'.$params.'&num='.$current_question.'&remind_question_id='.$remind_question_id.'";
            }            
            window.location = url;
        }
        
        function redirectExerciseToResult() 
        {
            window.location = "'.$script_php.'?'.$params.'";
        }

        function save_now(question_id, url_extra, validate) {
            // 1. Normal choice inputs
            var my_choice = $(\'*[name*="choice[\'+question_id+\']"]\').serialize();
            
            // 2. Reminder checkbox
            var remind_list = $(\'*[name*="remind_list"]\').serialize();

            // 3. Hotspots
            var hotspot = $(\'*[name*="hotspot[\'+question_id+\']"]\').serialize();
            
            // 4. choice for degree of certainty
            var my_choiceDc = $(\'*[name*="choiceDegreeCertainty[\'+question_id+\']"]\').serialize();

            // Checking CkEditor
            if (question_id) {
                if (CKEDITOR.instances["choice["+question_id+"]"]) {
                    var ckContent = CKEDITOR.instances["choice["+question_id+"]"].getData();
                    my_choice = {};
                    my_choice["choice["+question_id+"]"] = ckContent;
                    my_choice = $.param(my_choice);
                }
            }
            
            if ($(\'input[name="remind_list[\'+question_id+\']"]\').is(\':checked\')) {
                $("#question_div_"+question_id).addClass("remind_highlight");
            } else {
                $("#question_div_"+question_id).removeClass("remind_highlight");
            }

            // Only for the first time
            var dataparam = "'.$params.'&type=simple&question_id="+question_id;
            dataparam += "&"+my_choice+"&"+hotspot+"&"+remind_list+"&"+my_choiceDc;
            
            $("#save_for_now_"+question_id).html(\''.
                Display::returnFontAwesomeIcon('spinner', null, true, 'fa-spin').'\');
            $.ajax({
                type:"post",
                async: false,
                url: "'.api_get_path(WEB_AJAX_PATH).'exercise.ajax.php?'.api_get_cidreq().'&a=save_exercise_by_now",
                data: dataparam,
                success: function(return_value) {
                    if (return_value == "ok") {
                        $("#save_for_now_"+question_id).html(\''.
                        Display::return_icon('save.png', get_lang('Saved...'), [], ICON_SIZE_SMALL).'\');                                                    
                    } else if (return_value == "error") {
                        $("#save_for_now_"+question_id).html(\''.
                            Display::return_icon('error.png', get_lang('Error'), [], ICON_SIZE_SMALL).'\');
                    } else if (return_value == "one_per_page") {
                        var url = "";
                        if ('.$reminder.' == 1 ) {
                            url = "exercise_reminder.php?'.$params.'&num='.$current_question.'";
                        } else if ('.$reminder.' == 2 ) {
                            url = "exercise_submit.php?'.$params.'&num='.$current_question.
                                '&remind_question_id='.$remind_question_id.'&reminder=2";
                        } else {
                            url = "exercise_submit.php?'.$params.'&num='.$current_question.
                                '&remind_question_id='.$remind_question_id.'";
                        }

                        if (url_extra) {
                            url = url_extra;
                        }

                        $("#save_for_now_"+question_id).html(\''.
                            Display::return_icon('save.png', get_lang('Saved...'), [], ICON_SIZE_SMALL).'\');

                        window.location = url;
                    }
                },
                error: function() {
                    $("#save_for_now_"+question_id).html(\''.
                        Display::return_icon('error.png', get_lang('Error'), [], ICON_SIZE_SMALL).'\');
                }
            });
        }

        function save_now_all(validate) {
            // 1. Input choice.
            var my_choice = $(\'*[name*="choice"]\').serialize();

            // 2. Reminder.
            var remind_list = $(\'*[name*="remind_list"]\').serialize();

            // 3. Hotspots.
            var hotspot = $(\'*[name*="hotspot"]\').serialize();
            
            // Question list.
            var question_list = ['.implode(',', $questionList).'];
            var free_answers = {};
            $.each(question_list, function(index, my_question_id) {
                // Checking Ckeditor
                if (my_question_id) {
                    if (CKEDITOR.instances["choice["+my_question_id+"]"]) {
                        var ckContent = CKEDITOR.instances["choice["+my_question_id+"]"].getData();
                        free_answers["free_choice["+my_question_id+"]"] = ckContent;
                    }
                }
            });

            free_answers = $.param(free_answers);
            $("#save_all_response").html(\''.Display::returnFontAwesomeIcon('spinner', null, true, 'fa-spin').'\');

            $.ajax({
                type:"post",
                async: false,
                url: "'.api_get_path(WEB_AJAX_PATH).'exercise.ajax.php?'.api_get_cidreq().'&a=save_exercise_by_now",
                data: "'.$params.'&type=all&"+my_choice+"&"+hotspot+"&"+free_answers+"&"+remind_list,
                success: function(return_value) {
                    if (return_value == "ok") {
                        if (validate == "validate") {
                            window.location = "'.$script_php.'?'.$params.'";
                        } else {
                            $("#save_all_response").html(\''.Display::return_icon('accept.png').'\');
                        }
                    } else {
                        $("#save_all_response").html(\''.Display::return_icon('wrong.gif').'\');
                    }
                }
            });
            return false;
        }

        function validate_all() {
            save_now_all("validate");
        }
    </script>';

    echo '<form id="exercise_form" method="post" action="'.
            api_get_self().'?'.api_get_cidreq().'&reminder='.$reminder.
            '&autocomplete=off&exerciseId='.$exerciseId.'" name="frm_exercise" '.$onsubmit.'>
         <input type="hidden" name="formSent" value="1" />
         <input type="hidden" name="exerciseId" value="'.$exerciseId.'" />
         <input type="hidden" name="num" value="'.$current_question.'" id="num_current_id" />
         <input type="hidden" name="num_answer" value="'.$currentAnswer.'" id="num_current_answer_id" />
         <input type="hidden" name="exe_id" value="'.$exe_id.'" />
         <input type="hidden" name="origin" value="'.$origin.'" />
         <input type="hidden" name="reminder" value="'.$reminder.'" />
         <input type="hidden" name="learnpath_id" value="'.$learnpath_id.'" />
         <input type="hidden" name="learnpath_item_id" value="'.$learnpath_item_id.'" />         
         <input type="hidden" name="learnpath_item_view_id" value="'.$learnpath_item_view_id.'" />';

    // Show list of questions
    $i = 1;
    $attempt_list = [];
    if (isset($exe_id)) {
        $attempt_list = Event::getAllExerciseEventByExeId($exe_id);
    }

    $remind_list = [];
    if (isset($exercise_stat_info['questions_to_check']) &&
        !empty($exercise_stat_info['questions_to_check'])
    ) {
        $remind_list = explode(',', $exercise_stat_info['questions_to_check']);
    }

    foreach ($questionList as $questionId) {
        // for sequential exercises
        if ($objExercise->type == ONE_PER_PAGE) {
            // if it is not the right question, goes to the next loop iteration
            if ($current_question != $i) {
                $i++;
                continue;
            } else {
                if (!in_array($objExercise->getFeedbackType(), [EXERCISE_FEEDBACK_TYPE_DIRECT, EXERCISE_FEEDBACK_TYPE_POPUP])) {
                    // if the user has already answered this question
                    if (isset($exerciseResult[$questionId])) {
                        // construction of the Question object
                        $objQuestionTmp = Question::read($questionId);
                        $questionName = $objQuestionTmp->selectTitle();
                        // destruction of the Question object
                        unset($objQuestionTmp);
                        echo Display::return_message(get_lang('You already answered the question'));
                        $i++;
                        break;
                    }
                }
            }
        }

        $user_choice = null;
        if (isset($attempt_list[$questionId])) {
            $user_choice = $attempt_list[$questionId];
        } elseif ($objExercise->getSaveCorrectAnswers()) {
            $correctAnswers = [];
            switch ($objExercise->getSaveCorrectAnswers()) {
                case 1:
                    $correctAnswers = $objExercise->getCorrectAnswersInAllAttempts(
                        $learnpath_id,
                        $learnpath_item_id
                    );
                    break;
                case 2:
                    $correctAnswers = $objExercise->getAnswersInAllAttempts(
                        $learnpath_id,
                        $learnpath_item_id,
                        false
                    );
                    break;
            }

            if (isset($correctAnswers[$questionId])) {
                $user_choice = $correctAnswers[$questionId];
            }
        }

        $remind_highlight = '';
        // Hides questions when reviewing a ALL_ON_ONE_PAGE exercise see #4542 no_remind_highlight class hide with jquery
        if ($objExercise->type == ALL_ON_ONE_PAGE &&
            isset($_GET['reminder']) && $_GET['reminder'] == 2
        ) {
            $remind_highlight = 'no_remind_highlight';
        }

        $exerciseActions = '';
        $is_remind_on = false;

        $attributes = ['id' => 'remind_list['.$questionId.']'];
        if (in_array($questionId, $remind_list)) {
            $is_remind_on = true;
            $attributes['checked'] = 1;
            $remind_question = true;
            $remind_highlight = ' remind_highlight ';
        }

        // Showing the exercise description
        if (!empty($objExercise->description)) {
            if ($objExercise->type == ONE_PER_PAGE || ($objExercise->type != ONE_PER_PAGE && $i == 1)) {
                echo Display::panelCollapse(
                    '<span>'.get_lang('Description').'</span>',
                    $objExercise->description,
                    'exercise-description',
                    [],
                    'description',
                    'exercise-collapse',
                    false,
                    true
                );
            }
        }

        echo '<div id="question_div_'.$questionId.'" class="main-question '.$remind_highlight.'" >';

        $showQuestion = true;
        $exerciseResultFromSession = Session::read('exerciseResult');
        if ($objExercise->getFeedbackType() === EXERCISE_FEEDBACK_TYPE_POPUP &&
            isset($exerciseResultFromSession[$questionId])
        ) {
            $showQuestion = false;
        }

        // Shows the question and its answers
        if ($showQuestion) {
            ExerciseLib::showQuestion(
                $objExercise,
                $questionId,
                false,
                $origin,
                $i,
                $objExercise->getHideQuestionTitle() ? false : true,
                false,
                $user_choice,
                false,
                null,
                false,
                true
            );
        } else {
            echo Display::return_message(get_lang('You already answered the question'));
        }

        // Button save and continue
        switch ($objExercise->type) {
            case ONE_PER_PAGE:
                $exerciseActions .= $objExercise->show_button(
                    $questionId,
                    $current_question,
                    [],
                    [],
                    $myRemindList
                );
                break;
            case ALL_ON_ONE_PAGE:
                if (api_is_allowed_to_session_edit()) {
                    $button = [
                        Display::button(
                            'save_now',
                            get_lang('Save and continue'),
                            ['type' => 'button', 'class' => 'btn btn-info', 'data-question' => $questionId]
                        ),
                        '<span id="save_for_now_'.$questionId.'"></span>&nbsp;',
                    ];
                    $exerciseActions .= Display::div(
                        implode(PHP_EOL, $button),
                        ['class' => 'exercise_save_now_button']
                    );
                }
                break;
        }

        // Checkbox review answers
        if ($objExercise->review_answers) {
            $remind_question_div = Display::tag(
                'label',
                Display::input(
                    'checkbox',
                    'remind_list['.$questionId.']',
                    '',
                    $attributes
                ).get_lang('Revise question later'),
                [
                    'class' => 'checkbox',
                    'for' => 'remind_list['.$questionId.']',
                ]
            );
            $exerciseActions .= Display::div(
                $remind_question_div,
                ['class' => 'exercise_save_now_button']
            );
        }
        echo Display::div($exerciseActions, ['class' => 'form-actions']);
        echo '</div>';

        $i++;
        // for sequential exercises
        if ($objExercise->type == ONE_PER_PAGE) {
            // quits the loop
            break;
        }
    }
    // end foreach()
    if ($objExercise->type == ALL_ON_ONE_PAGE) {
        $exerciseActions = $objExercise->show_button(
            $questionId,
            $current_question
        );
        echo Display::div($exerciseActions, ['class' => 'exercise_actions']);
        echo '<br>';
    }
    echo '</form>';
}
if (!in_array($origin, ['learnpath', 'embeddable'])) {
    // So we are not in learnpath tool
    echo '</div>'; //End glossary div
}
Display::display_footer();
