Kodlamadan anlayan arkadaşlar lütfen bi baksın

/**
 * JavaScript library for the quiz module.
 *
 * @package    mod
 * @subpackage quiz
 * @copyright  1999 onwards Martin Dougiamas  {@link http://moodle.com}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
M.mod_quiz = M.mod_quiz || {};
M.mod_quiz.init_attempt_form = function(Y) {
    M.core_question_engine.init_form(Y, '#responseform');
    Y.on('submit', M.mod_quiz.timer.stop, '#responseform');
    M.core_formchangechecker.init({
        formid: 'responseform'
    })
};
M.mod_quiz.init_review_form = function(Y) {
    M.core_question_engine.init_form(Y, '.questionflagsaveform');
    Y.on('submit', function(e) {
        e.halt()
    }, '.questionflagsaveform')
};
M.mod_quiz.init_comment_popup = function(Y) {
    var closebutton = Y.Node.create('<input type="button" class="btn btn-secondary" />');
    closebutton.set('value', M.util.get_string('cancel', 'moodle'));
    Y.one('#id_submitbutton').ancestor().append(closebutton);
    Y.on('click', function() {
        window.close()
    }, closebutton)
}
M.mod_quiz.timer = {
    Y: null,
    endtime: 0,
    preview: 0,
    timeoutid: null,
    init: function(Y, start, preview) {
        M.mod_quiz.timer.Y = Y;
        M.mod_quiz.timer.endtime = M.pageloadstarttime.getTime() + start * 1000;
        M.mod_quiz.timer.preview = preview;
        M.mod_quiz.timer.update();
        Y.one('#quiz-timer').setStyle('display', 'block')
    },
    stop: function(e) {
        if (M.mod_quiz.timer.timeoutid) {
            clearTimeout(M.mod_quiz.timer.timeoutid)
        }
    },
    two_digit: function(num) {
        if (num < 10) {
            return '0' + num
        } else {
            return num
        }
    },
    update: function() {
        var Y = M.mod_quiz.timer.Y;
        var secondsleft = Math.floor((M.mod_quiz.timer.endtime - new Date().getTime()) / 1000);
        if (secondsleft < 0) {
            M.mod_quiz.timer.stop(null);
            Y.one('#quiz-time-left').setContent(M.util.get_string('timesup', 'quiz'));
            var input = Y.one('input[name=timeup]');
            input.set('value', 1);
            var form = input.ancestor('form');
            if (form.one('input[name=finishattempt]')) {
                form.one('input[name=finishattempt]').set('value', 0)
            }
            M.core_formchangechecker.set_form_submitted();
            form.submit();
            return
        }
        if (secondsleft < 100) {
            Y.one('#quiz-timer').removeClass('timeleft' + (secondsleft + 2)).removeClass('timeleft' + (secondsleft + 1)).addClass('timeleft' + secondsleft)
        }
        var hours = Math.floor(secondsleft / 3600);
        secondsleft -= hours * 3600;
        var minutes = Math.floor(secondsleft / 60);
        secondsleft -= minutes * 60;
        var seconds = secondsleft;
        Y.one('#quiz-time-left').setContent(hours + ':' + M.mod_quiz.timer.two_digit(minutes) + ':' + M.mod_quiz.timer.two_digit(seconds));
        M.mod_quiz.timer.timeoutid = setTimeout(M.mod_quiz.timer.update, 100)
    }
};
M.mod_quiz.nav = M.mod_quiz.nav || {};
M.mod_quiz.nav.update_flag_state = function(attemptid, questionid, newstate) {
    var Y = M.mod_quiz.nav.Y;
    var navlink = Y.one('#quiznavbutton' + questionid);
    navlink.removeClass('flagged');
    if (newstate == 1) {
        navlink.addClass('flagged');
        navlink.one('.accesshide .flagstate').setContent(M.util.get_string('flagged', 'question'))
    } else {
        navlink.one('.accesshide .flagstate').setContent('')
    }
};
M.mod_quiz.nav.init = function(Y) {
    M.mod_quiz.nav.Y = Y;
    Y.all('#quiznojswarning').remove();
    var form = Y.one('#responseform');
    if (form) {
        function nav_to_page(pageno) {
            Y.one('#followingpage').set('value', pageno);
            var submit = form.one('input[name="next"]');
            submit.set('name', '');
            submit.getDOMNode().click()
        };
        Y.delegate('click', function(e) {
            if (this.hasClass('thispage')) {
                return
            }
            e.preventDefault();
            var pageidmatch = this.get('href').match(/page=(\d+)/);
            var pageno;
            if (pageidmatch) {
                pageno = pageidmatch[1]
            } else {
                pageno = 0
            }
            var questionidmatch = this.get('href').match(/#question-(\d+)-(\d+)/);
            if (questionidmatch) {
                form.set('action', form.get('action') + questionidmatch[0])
            }
            nav_to_page(pageno)
        }, document.body, '.qnbutton')
    }
    if (Y.one('a.endtestlink')) {
        Y.on('click', function(e) {
            e.preventDefault();
            nav_to_page(-1)
        }, 'a.endtestlink')
    }
    if (M.core_question_flags) {
        M.core_question_flags.add_listener(M.mod_quiz.nav.update_flag_state)
    }
};
M.mod_quiz.secure_window = {
    init: function(Y) {
        if (window.location.href.substring(0, 4) == 'file') {
            window.location = 'about:blank'
        }
        Y.delegate('contextmenu', M.mod_quiz.secure_window.prevent, document, '*');
        Y.delegate('mousedown', M.mod_quiz.secure_window.prevent_mouse, 'body', '*');
        Y.delegate('mouseup', M.mod_quiz.secure_window.prevent_mouse, 'body', '*');
        Y.delegate('dragstart', M.mod_quiz.secure_window.prevent, document, '*');
        Y.delegate('selectstart', M.mod_quiz.secure_window.prevent_selection, document, '*');
        Y.delegate('cut', M.mod_quiz.secure_window.prevent, document, '*');
        Y.delegate('copy', M.mod_quiz.secure_window.prevent, document, '*');
        Y.delegate('paste', M.mod_quiz.secure_window.prevent, document, '*');
        Y.on('beforeprint', function() {
            Y.one(document.body).setStyle('display', 'none')
        }, window);
        Y.on('afterprint', function() {
            Y.one(document.body).setStyle('display', 'block')
        }, window);
        Y.on('key', M.mod_quiz.secure_window.prevent, '*', 'press:67,86,88+ctrl');
        Y.on('key', M.mod_quiz.secure_window.prevent, '*', 'up:67,86,88+ctrl');
        Y.on('key', M.mod_quiz.secure_window.prevent, '*', 'down:67,86,88+ctrl');
        Y.on('key', M.mod_quiz.secure_window.prevent, '*', 'press:67,86,88+meta');
        Y.on('key', M.mod_quiz.secure_window.prevent, '*', 'up:67,86,88+meta');
        Y.on('key', M.mod_quiz.secure_window.prevent, '*', 'down:67,86,88+meta')
    },
    is_content_editable: function(n) {
        if (n.test('[contenteditable=true]')) {
            return !0
        }
        n = n.get('parentNode');
        if (n === null) {
            return !1
        }
        return M.mod_quiz.secure_window.is_content_editable(n)
    },
    prevent_selection: function(e) {
        return !1
    },
    prevent: function(e) {
        alert(M.util.get_string('functiondisabledbysecuremode', 'quiz'));
        e.halt()
    },
    prevent_mouse: function(e) {
        if (e.button == 1 && /^(INPUT|TEXTAREA|BUTTON|SELECT|LABEL|A)$/i.test(e.target.get('tagName'))) {
            return
        }
        if (e.button == 1 && M.mod_quiz.secure_window.is_content_editable(e.target)) {
            return
        }
        e.halt()
    },
    init_close_button: function(Y, url) {
        Y.on('click', function(e) {
            M.mod_quiz.secure_window.close(url, 0)
        }, '#secureclosebutton')
    },
    close: function(Y, url, delay) {
        setTimeout(function() {
            if (window.opener) {
                window.opener.document.location.reload();
                window.close()
            } else {
                window.location.href = url
            }
        }, delay * 1000)
    }
}