PHP quiz::get_access_manager方法代碼示例

}
if (!($quiz = $DB->get_record('quiz', array('id' => $cm->instance)))) {
    print_error('invalidcoursemodule');
}
$quizobj = new quiz($quiz, $cm, $course);
/// Check login and sesskey.
require_login($quizobj->get_courseid(), false, $quizobj->get_cm());
if (!confirm_sesskey()) {
    throw new moodle_exception('confirmsesskeybad', 'error', $quizobj->view_url());
}
/// if no questions have been set up yet redirect to edit.php
if (!$quizobj->get_question_ids() && $quizobj->has_capability('mod/quiz:manage')) {
    redirect($quizobj->edit_url());
}
/// Create an object to manage all the other (non-roles) access rules.
$accessmanager = $quizobj->get_access_manager(time());
if ($quizobj->is_preview_user() && $forcenew) {
    $accessmanager->clear_password_access();
}
/// Check capabilites.
if (!$quizobj->is_preview_user()) {
    $quizobj->require_capability('mod/quiz:attempt');
}
/// Check to see if a new preview was requested.
if ($quizobj->is_preview_user() && $forcenew) {
    /// To force the creation of a new preview, we set a finish time on the
    /// current attempt (if any). It will then automatically be deleted below
    $DB->set_field('quiz_attempts', 'timefinish', time(), array('quiz' => $quiz->id, 'userid' => $USER->id));
}
/// Look for an existing attempt.
$lastattempt = quiz_get_latest_attempt_by_user($quiz->id, $USER->id);

/**
 * Creates an object to represent a new attempt at a quiz
 *
 * Creates an attempt object to represent an attempt at the quiz by the current
 * user starting at the current time. The ->id field is not set. The object is
 * NOT written to the database.
 *
 * @param object $quizobj the quiz object to create an attempt for.
 * @param int $attemptnumber the sequence number for the attempt.
 * @param object $lastattempt the previous attempt by this user, if any. Only needed
 *         if $attemptnumber > 1 and $quiz->attemptonlast is true.
 * @param int $timenow the time the attempt was started at.
 * @param bool $ispreview whether this new attempt is a preview.
 *
 * @return object the newly created attempt object.
 */
function quiz_create_attempt(quiz $quizobj, $attemptnumber, $lastattempt, $timenow, $ispreview = false) {
    global $USER;

    $quiz = $quizobj->get_quiz();
    if ($quiz->sumgrades < 0.000005 && $quiz->grade > 0.000005) {
        throw new moodle_exception('cannotstartgradesmismatch', 'quiz',
                new moodle_url('/mod/quiz/view.php', array('q' => $quiz->id)),
                    array('grade' => quiz_format_grade($quiz, $quiz->grade)));
    }

    if ($attemptnumber == 1 || !$quiz->attemptonlast) {
        // We are not building on last attempt so create a new attempt.
        $attempt = new stdClass();
        $attempt->quiz = $quiz->id;
        $attempt->userid = $USER->id;
        $attempt->preview = 0;
        $attempt->layout = quiz_clean_layout($quiz->questions, true);
        if ($quiz->shufflequestions) {
            $attempt->layout = quiz_repaginate($attempt->layout, $quiz->questionsperpage, true);
        }
    } else {
        // Build on last attempt.
        if (empty($lastattempt)) {
            print_error('cannotfindprevattempt', 'quiz');
        }
        $attempt = $lastattempt;
    }

    $attempt->attempt = $attemptnumber;
    $attempt->timestart = $timenow;
    $attempt->timefinish = 0;
    $attempt->timemodified = $timenow;
    $attempt->state = quiz_attempt::IN_PROGRESS;

    // If this is a preview, mark it as such.
    if ($ispreview) {
        $attempt->preview = 1;
    }

    $timeclose = $quizobj->get_access_manager($timenow)->get_end_time($attempt);
    if ($timeclose === false || $ispreview) {
        $attempt->timecheckstate = null;
    } else {
        $attempt->timecheckstate = $timeclose;
    }

    return $attempt;
}