PHP quiz_access_manager::print_messages方法代码示例

print_header($title, $course->fullname, $navigation, '', '', true, $buttons, navmenu($course, $cm), false, $bodytags);
/// Print heading and tabs (if there is more than one).
$currenttab = 'info';
include 'tabs.php';
/// Print quiz name and description
echo $OUTPUT->heading(format_string($quiz->name));
if (trim(strip_tags($quiz->intro))) {
    echo $OUTPUT->box(format_module_intro('quiz', $quiz, $cm->id), 'generalbox', 'intro');
}
/// Display information about this quiz.
$messages = $accessmanager->describe_rules();
if ($quiz->attempts != 1) {
    $messages[] = get_string('gradingmethod', 'quiz', quiz_get_grading_option_name($quiz->grademethod));
}
echo $OUTPUT->box_start('quizinfo');
$accessmanager->print_messages($messages);
echo $OUTPUT->box_end();
/// Show number of attempts summary to those who can view reports.
if (has_capability('mod/quiz:viewreports', $context)) {
    if ($strattemptnum = quiz_num_attempt_summary($quiz, $cm)) {
        echo '<div class="quizattemptcounts"><a href="report.php?mode=overview&amp;id=' . $cm->id . '">' . $strattemptnum . "</a></div>\n";
    }
}
/// Guests can't do a quiz, so offer them a choice of logging in or going back.
if (isguestuser()) {
    echo $OUTPUT->confirm('<p>' . get_string('guestsno', 'quiz') . "</p>\n\n<p>" . get_string('liketologin') . "</p>\n", get_login_url(), get_referer(false));
    echo $OUTPUT->footer();
    exit;
}
/// If they are not enrolled in this course in a good enough role, tell them to enrol.
if (!($canattempt || $canpreview || $canreviewmine)) {

function prepareQuizAttempt($q)
{
    global $DB;
    if ($id) {
        if (!($cm = get_coursemodule_from_id('quiz', $id))) {
            print_error('invalidcoursemodule');
        }
        if (!($course = $DB->get_record('course', array('id' => $cm->course)))) {
            print_error('coursemisconf');
        }
        if (!($quiz = $DB->get_record('quiz', array('id' => $cm->instance)))) {
            print_error('invalidcoursemodule');
        }
    } else {
        if (!($quiz = $DB->get_record('quiz', array('id' => $q)))) {
            print_error('invalidquizid', 'quiz');
        }
        if (!($course = $DB->get_record('course', array('id' => $quiz->course)))) {
            print_error('invalidcourseid');
        }
        if (!($cm = get_coursemodule_from_instance("quiz", $quiz->id, $course->id))) {
            print_error('invalidcoursemodule');
        }
    }
    /// Check login and get context.
    require_login($course->id, false, $cm);
    $context = get_context_instance(CONTEXT_MODULE, $cm->id);
    require_capability('mod/quiz:view', $context);
    /// Cache some other capabilites we use several times.
    $canattempt = has_capability('mod/quiz:attempt', $context);
    $canreviewmine = has_capability('mod/quiz:reviewmyattempts', $context);
    $canpreview = has_capability('mod/quiz:preview', $context);
    /// Create an object to manage all the other (non-roles) access rules.
    $timenow = time();
    $accessmanager = new quiz_access_manager(new quiz($quiz, $cm, $course), $timenow, has_capability('mod/quiz:ignoretimelimits', $context, NULL, false));
    /// Print information about the student's best score for this quiz if possible.
    $moreattempts = $unfinished || !$accessmanager->is_finished($numattempts, $lastfinishedattempt);
    /// Determine if we should be showing a start/continue attempt button,
    /// or a button to go back to the course page.
    print_box_start('quizattempt');
    $buttontext = '';
    // This will be set something if as start/continue attempt button should appear.
    if (!$quiz->questions) {
        print_heading(get_string("noquestions", "quiz"));
    } else {
        if ($unfinished) {
            if ($canattempt) {
                $buttontext = get_string('continueattemptquiz', 'quiz');
            } else {
                if ($canpreview) {
                    $buttontext = get_string('continuepreview', 'quiz');
                }
            }
        } else {
            if ($canattempt) {
                $messages = $accessmanager->prevent_new_attempt($numattempts, $lastfinishedattempt);
                if ($messages) {
                    $accessmanager->print_messages($messages);
                } else {
                    if ($numattempts == 0) {
                        $buttontext = get_string('attemptquiznow', 'quiz');
                    } else {
                        $buttontext = get_string('reattemptquiz', 'quiz');
                    }
                }
            } else {
                if ($canpreview) {
                    $buttontext = get_string('previewquiznow', 'quiz');
                }
            }
        }
        // If, so far, we think a button should be printed, so check if they will be allowed to access it.
        if ($buttontext) {
            if (!$moreattempts) {
                $buttontext = '';
            } else {
                if ($canattempt && ($messages = $accessmanager->prevent_access())) {
                    $accessmanager->print_messages($messages);
                    $buttontext = '';
                }
            }
        }
    }
    /// Now actually print the appropriate button.
    if ($buttontext) {
        $accessmanager->print_start_attempt_button($canpreview, $buttontext, $unfinished);
    } else {
        print_continue($CFG->wwwroot . '/course/view.php?id=' . $course->id);
    }
    print_box_end();
}