PHP completion_info::delete_course_completion_data方法代码示例

/**
 * This function will empty a course of user data.
 * It will retain the activities and the structure of the course.
 *
 * @param object $data an object containing all the settings including courseid (without magic quotes)
 * @return array status array of array component, item, error
 */
function reset_course_userdata($data)
{
    global $CFG, $USER, $DB;
    require_once $CFG->libdir . '/gradelib.php';
    require_once $CFG->libdir . '/completionlib.php';
    require_once $CFG->dirroot . '/group/lib.php';
    $data->courseid = $data->id;
    $context = get_context_instance(CONTEXT_COURSE, $data->courseid);
    // calculate the time shift of dates
    if (!empty($data->reset_start_date)) {
        // time part of course startdate should be zero
        $data->timeshift = $data->reset_start_date - usergetmidnight($data->reset_start_date_old);
    } else {
        $data->timeshift = 0;
    }
    // result array: component, item, error
    $status = array();
    // start the resetting
    $componentstr = get_string('general');
    // move the course start time
    if (!empty($data->reset_start_date) and $data->timeshift) {
        // change course start data
        $DB->set_field('course', 'startdate', $data->reset_start_date, array('id' => $data->courseid));
        // update all course and group events - do not move activity events
        $updatesql = "UPDATE {event}\n                         SET timestart = timestart + ?\n                       WHERE courseid=? AND instance=0";
        $DB->execute($updatesql, array($data->timeshift, $data->courseid));
        $status[] = array('component' => $componentstr, 'item' => get_string('datechanged'), 'error' => false);
    }
    if (!empty($data->reset_logs)) {
        $DB->delete_records('log', array('course' => $data->courseid));
        $status[] = array('component' => $componentstr, 'item' => get_string('deletelogs'), 'error' => false);
    }
    if (!empty($data->reset_events)) {
        $DB->delete_records('event', array('courseid' => $data->courseid));
        $status[] = array('component' => $componentstr, 'item' => get_string('deleteevents', 'calendar'), 'error' => false);
    }
    if (!empty($data->reset_notes)) {
        require_once $CFG->dirroot . '/notes/lib.php';
        note_delete_all($data->courseid);
        $status[] = array('component' => $componentstr, 'item' => get_string('deletenotes', 'notes'), 'error' => false);
    }
    if (!empty($data->delete_blog_associations)) {
        require_once $CFG->dirroot . '/blog/lib.php';
        blog_remove_associations_for_course($data->courseid);
        $status[] = array('component' => $componentstr, 'item' => get_string('deleteblogassociations', 'blog'), 'error' => false);
    }
    if (!empty($data->reset_course_completion)) {
        // Delete course completion information
        $course = $DB->get_record('course', array('id' => $data->courseid));
        $cc = new completion_info($course);
        $cc->delete_course_completion_data();
        $status[] = array('component' => $componentstr, 'item' => get_string('deletecoursecompletiondata', 'completion'), 'error' => false);
    }
    $componentstr = get_string('roles');
    if (!empty($data->reset_roles_overrides)) {
        $children = get_child_contexts($context);
        foreach ($children as $child) {
            $DB->delete_records('role_capabilities', array('contextid' => $child->id));
        }
        $DB->delete_records('role_capabilities', array('contextid' => $context->id));
        //force refresh for logged in users
        mark_context_dirty($context->path);
        $status[] = array('component' => $componentstr, 'item' => get_string('deletecourseoverrides', 'role'), 'error' => false);
    }
    if (!empty($data->reset_roles_local)) {
        $children = get_child_contexts($context);
        foreach ($children as $child) {
            role_unassign_all(array('contextid' => $child->id));
        }
        //force refresh for logged in users
        mark_context_dirty($context->path);
        $status[] = array('component' => $componentstr, 'item' => get_string('deletelocalroles', 'role'), 'error' => false);
    }
    // First unenrol users - this cleans some of related user data too, such as forum subscriptions, tracking, etc.
    $data->unenrolled = array();
    if (!empty($data->unenrol_users)) {
        $plugins = enrol_get_plugins(true);
        $instances = enrol_get_instances($data->courseid, true);
        foreach ($instances as $key => $instance) {
            if (!isset($plugins[$instance->enrol])) {
                unset($instances[$key]);
                continue;
            }
            if (!$plugins[$instance->enrol]->allow_unenrol($instance)) {
                unset($instances[$key]);
            }
        }
        $sqlempty = $DB->sql_empty();
        foreach ($data->unenrol_users as $withroleid) {
            $sql = "SELECT DISTINCT ue.userid, ue.enrolid\n                      FROM {user_enrolments} ue\n                      JOIN {enrol} e ON (e.id = ue.enrolid AND e.courseid = :courseid)\n                      JOIN {context} c ON (c.contextlevel = :courselevel AND c.instanceid = e.courseid)\n                      JOIN {role_assignments} ra ON (ra.contextid = c.id AND ra.roleid = :roleid AND ra.userid = ue.userid)";
            $params = array('courseid' => $data->courseid, 'roleid' => $withroleid, 'courselevel' => CONTEXT_COURSE);
            $rs = $DB->get_recordset_sql($sql, $params);
            foreach ($rs as $ue) {
//.........这里部分代码省略.........

// Set up the page.
$PAGE->set_course($course);
$PAGE->set_url('/course/completion.php', array('id' => $course->id));
$PAGE->set_title($course->shortname);
$PAGE->set_heading($course->fullname);
$PAGE->set_pagelayout('admin');
// Create the settings form instance.
$form = new course_completion_form('completion.php?id=' . $id, array('course' => $course));
if ($form->is_cancelled()) {
    redirect($CFG->wwwroot . '/course/view.php?id=' . $course->id);
} else {
    if ($data = $form->get_data()) {
        $completion = new completion_info($course);
        // Process criteria unlocking if requested.
        if (!empty($data->settingsunlock)) {
            $completion->delete_course_completion_data();
            // Return to form (now unlocked).
            redirect($PAGE->url);
        }
        // Delete old criteria.
        $completion->clear_criteria();
        // Loop through each criteria type and run its update_config() method.
        global $COMPLETION_CRITERIA_TYPES;
        foreach ($COMPLETION_CRITERIA_TYPES as $type) {
            $class = 'completion_criteria_' . $type;
            $criterion = new $class();
            $criterion->update_config($data);
        }
        // Handle overall aggregation.
        $aggdata = array('course' => $data->id, 'criteriatype' => null);
        $aggregation = new completion_aggregation($aggdata);