C:/xampp/htdocs/moodle/mod/quiz/accessrule/accessrulebase.php

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<?php
// This file is part of Moodle - http://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 <http://www.gnu.org/licenses/>.

defined('MOODLE_INTERNAL') || die();

require_once($CFG->dirroot . '/mod/quiz/locallib.php');


abstract class quiz_access_rule_base {
    protected $quiz;
    protected $quizobj;
    protected $timenow;

    public function __construct($quizobj, $timenow) {
        $this->quizobj = $quizobj;
        $this->quiz = $quizobj->get_quiz();
        $this->timenow = $timenow;
    }

    public static function make(quiz $quizobj, $timenow, $canignoretimelimits) {
        return null;
    }

    public function prevent_new_attempt($numprevattempts, $lastattempt) {
        return false;
    }

    public function prevent_access() {
        return false;
    }

    public function is_preflight_check_required($attemptid) {
        return false;
    }

    public function add_preflight_check_form_fields(mod_quiz_preflight_check_form $quizform,
            MoodleQuickForm $mform, $attemptid) {
        // Do nothing by default.
    }

    public function validate_preflight_check($data, $files, $errors, $attemptid) {
        return $errors;
    }

    public function notify_preflight_check_passed($attemptid) {
        // Do nothing by default.
    }

    public function current_attempt_finished() {
        // Do nothing by default.
    }

    public function description() {
        return '';
    }

    public function is_finished($numprevattempts, $lastattempt) {
        return false;
    }

    public function time_left($attempt, $timenow) {
        return false;
    }

    public function attempt_must_be_in_popup() {
        return false;
    }

    public function get_popup_options() {
        return array();
    }

    public function setup_attempt_page($page) {
        // Do nothing by default.
    }

    public function get_superceded_rules() {
        return array();
    }

    public static function add_settings_form_fields(
            mod_quiz_mod_form $quizform, MoodleQuickForm $mform) {
        // By default do nothing.
    }

    public static function get_browser_security_choices() {
        return array();
    }

    public static function save_settings($quiz) {
        // By default do nothing.
    }

    public static function get_settings_sql($quizid) {
        return array('', '', array());
    }

    public static function get_extra_settings($quizid) {
        return array();
    }
}