public static function login_user($chatid, $groupid = 0) {
        global $DB;

        $params = self::validate_parameters(self::login_user_parameters(),
                                            array(
                                                'chatid' => $chatid,
                                                'groupid' => $groupid
                                            ));
        $warnings = array();

        // Request and permission validation.
        $chat = $DB->get_record('chat', array('id' => $params['chatid']), '*', MUST_EXIST);
        list($course, $cm) = get_course_and_cm_from_instance($chat, 'chat');

        $context = context_module::instance($cm->id);
        self::validate_context($context);

        require_capability('mod/chat:chat', $context);

        if (!empty($params['groupid'])) {
            $groupid = $params['groupid'];
            // Determine is the group is visible to user.
            if (!groups_group_visible($groupid, $course, $cm)) {
                throw new moodle_exception('notingroup');
            }
        } else {
            // Check to see if groups are being used here.
            if ($groupmode = groups_get_activity_groupmode($cm)) {
                $groupid = groups_get_activity_group($cm);
                // Determine is the group is visible to user (this is particullary for the group 0).
                if (!groups_group_visible($groupid, $course, $cm)) {
                    throw new moodle_exception('notingroup');
                }
            } else {
                $groupid = 0;
            }
        }

        // Get the unique chat session id.
        // Since we are going to use the chat via Web Service requests we set the ajax version (since it's the most similar).
        if (!$chatsid = chat_login_user($chat->id, 'ajax', $groupid, $course)) {
            throw new moodle_exception('cantlogin', 'chat');
        }

        $result = array();
        $result['chatsid'] = $chatsid;
        $result['warnings'] = $warnings;
        return $result;
    }
public static function login_user($chatid, $groupid = 0) {
        global $DB;

        $params = self::validate_parameters(self::login_user_parameters(),
                                            array(
                                                'chatid' => $chatid,
                                                'groupid' => $groupid
                                            ));
        $warnings = array();

        // Request and permission validation.
        $chat = $DB->get_record('chat', array('id' => $params['chatid']), '*', MUST_EXIST);
        list($course, $cm) = get_course_and_cm_from_instance($chat, 'chat');

        $context = context_module::instance($cm->id);
        self::validate_context($context);

        require_capability('mod/chat:chat', $context);

        if (!empty($params['groupid'])) {
            $groupid = $params['groupid'];
            // Determine is the group is visible to user.
            if (!groups_group_visible($groupid, $course, $cm)) {
                throw new moodle_exception('notingroup');
            }
        } else {
            // Check to see if groups are being used here.
            if ($groupmode = groups_get_activity_groupmode($cm)) {
                $groupid = groups_get_activity_group($cm);
                // Determine is the group is visible to user (this is particullary for the group 0).
                if (!groups_group_visible($groupid, $course, $cm)) {
                    throw new moodle_exception('notingroup');
                }
            } else {
                $groupid = 0;
            }
        }

        // Get the unique chat session id.
        // Since we are going to use the chat via Web Service requests we set the ajax version (since it's the most similar).
        if (!$chatsid = chat_login_user($chat->id, 'ajax', $groupid, $course)) {
            throw new moodle_exception('cantlogin', 'chat');
        }

        $result = array();
        $result['chatsid'] = $chatsid;
        $result['warnings'] = $warnings;
        return $result;
    }
public static function login_user ( $ chatid , $ groupid = 0 ) { global $ DB ; $ params = self :: validate_parameters ( self :: login_user_parameters ( ) , array ( 'chatid' => $ chatid , 'groupid' => $ groupid ) ) ; $ warnings = array ( ) ; // Request and permission validation. $ chat = $ DB -> get_record ( 'chat' , array ( 'id' => $ params [ 'chatid' ] ) , '*' , MUST_EXIST ) ; list ( $ course , $ cm ) = get_course_and_cm_from_instance ( $ chat , 'chat' ) ; $ context = context_module :: instance ( $ cm -> id ) ; self :: validate_context ( $ context ) ; require_capability ( 'mod/chat:chat' , $ context ) ; if ( ! empty ( $ params [ 'groupid' ] ) ) { $ groupid = $ params [ 'groupid' ] ; // Determine is the group is visible to user. if ( ! groups_group_visible ( $ groupid , $ course , $ cm ) ) { throw new moodle_exception ( 'notingroup' ) ; } } else { // Check to see if groups are being used here. if ( $ groupmode = groups_get_activity_groupmode ( $ cm ) ) { $ groupid = groups_get_activity_group ( $ cm ) ; // Determine is the group is visible to user (this is particullary for the group 0). if ( ! groups_group_visible ( $ groupid , $ course , $ cm ) ) { throw new moodle_exception ( 'notingroup' ) ; } } else { $ groupid = 0 ; } } // Get the unique chat session id. // Since we are going to use the chat via Web Service requests we set the ajax version (since it's the most similar). if ( ! $ chatsid = chat_login_user ( $ chat -> id , 'ajax' , $ groupid , $ course ) ) { throw new moodle_exception ( 'cantlogin' , 'chat' ) ; } $ result = array ( ) ; $ result [ 'chatsid' ] = $ chatsid ; $ result [ 'warnings' ] = $ warnings ; return $ result ; }
Log the current user into a chat room in the given chat.

@param int $chatid the chat instance id
@param int $groupid the user group id
@return array of warnings and the chat unique session id
@since Moodle 3.0
@throws moodle_exception
Log the current user into a chat room in the given chat .