fix(mqtt_sn): reformat some code

apps/emqx_sn/src/emqx_sn_frame.erl

@@ -269,10 +269,10 @@ message_type(Type) ->
     io_lib:format("Unknown Type ~p", [Type]).
 
 format(?SN_PUBLISH_MSG(Flags, TopicId, MsgId, Data)) ->
-    io_lib:format("mqtt_sn_message SN_PUBLISH, ~p, TopicId=~w, MsgId=~w, Payload=~w",
+    io_lib:format("mqtt_sn_message SN_PUBLISH, ~s, TopicId=~w, MsgId=~w, Payload=~w",
                   [format_flag(Flags), TopicId, MsgId, Data]);
 format(?SN_PUBACK_MSG(Flags, MsgId, ReturnCode)) ->
-    io_lib:format("mqtt_sn_message SN_PUBACK, ~p, MsgId=~w, ReturnCode=~w",
+    io_lib:format("mqtt_sn_message SN_PUBACK, ~s, MsgId=~w, ReturnCode=~w",
                   [format_flag(Flags), MsgId, ReturnCode]);
 format(?SN_PUBREC_MSG(?SN_PUBCOMP, MsgId)) ->
     io_lib:format("mqtt_sn_message SN_PUBCOMP, MsgId=~w", [MsgId]);
@@ -281,13 +281,13 @@ format(?SN_PUBREC_MSG(?SN_PUBREC, MsgId)) ->
 format(?SN_PUBREC_MSG(?SN_PUBREL, MsgId)) ->
     io_lib:format("mqtt_sn_message SN_PUBREL, MsgId=~w", [MsgId]);
 format(?SN_SUBSCRIBE_MSG(Flags, Msgid, Topic)) ->
-    io_lib:format("mqtt_sn_message SN_SUBSCRIBE, ~p, MsgId=~w, TopicId=~w",
+    io_lib:format("mqtt_sn_message SN_SUBSCRIBE, ~s, MsgId=~w, TopicId=~w",
                   [format_flag(Flags), Msgid, Topic]);
 format(?SN_SUBACK_MSG(Flags, TopicId, MsgId, ReturnCode)) ->
-    io_lib:format("mqtt_sn_message SN_SUBACK, ~p, MsgId=~w, TopicId=~w, ReturnCode=~w",
+    io_lib:format("mqtt_sn_message SN_SUBACK, ~s, MsgId=~w, TopicId=~w, ReturnCode=~w",
                   [format_flag(Flags), MsgId, TopicId, ReturnCode]);
 format(?SN_UNSUBSCRIBE_MSG(Flags, Msgid, Topic)) ->
-    io_lib:format("mqtt_sn_message SN_UNSUBSCRIBE, ~p, MsgId=~w, TopicId=~w",
+    io_lib:format("mqtt_sn_message SN_UNSUBSCRIBE, ~s, MsgId=~w, TopicId=~w",
                   [format_flag(Flags), Msgid, Topic]);
 format(?SN_UNSUBACK_MSG(MsgId)) ->
     io_lib:format("mqtt_sn_message SN_UNSUBACK, MsgId=~w", [MsgId]);

apps/emqx_sn/src/emqx_sn_gateway.erl

@@ -219,7 +219,7 @@ idle(cast, {connack, ConnAck}, State) ->
     {next_state, connected, State};
 
 idle(timeout, _Timeout, State) ->
-    stop({shutdown, idle_timeout}, State);
+    stop(idle_timeout, State);
 
 idle(EventType, EventContent, State) ->
     handle_event(EventType, EventContent, idle, State).
@@ -374,10 +374,10 @@ connected(cast, {connack, ConnAck}, State) ->
 
 connected(cast, {shutdown, Reason, Packet}, State) ->
     ok = handle_outgoing(Packet, State),
-    {stop, {shutdown, Reason}, State};
+    stop(Reason, State);
 
 connected(cast, {shutdown, Reason}, State) ->
-    {stop, {shutdown, Reason}, State};
+    stop(Reason, State);
 
 connected(cast, {close, Reason}, State) ->
     ?LOG(debug, "Force to close the socket due to ~p", [Reason], State),
@@ -614,11 +614,11 @@ handle_return({ok, NChannel}, State, AddEvents) ->
 handle_return({ok, Replies, NChannel}, State, AddEvents) ->
     {keep_state, State#state{channel = NChannel}, outgoing_events(append(Replies, AddEvents))};
 handle_return({shutdown, Reason, NChannel}, State, _AddEvents) ->
-    stop({shutdown, Reason}, State#state{channel = NChannel});
+    stop(Reason, State#state{channel = NChannel});
 handle_return({shutdown, Reason, OutPacket, NChannel}, State, _AddEvents) ->
     NState = State#state{channel = NChannel},
     ok = handle_outgoing(OutPacket, NState),
-    stop({shutdown, Reason}, NState).
+    stop(Reason, NState).
 
 outgoing_events(Actions) ->
     lists:map(fun outgoing_event/1, Actions).
@@ -772,22 +772,26 @@ goto_asleep_state(Duration, State=#state{asleep_timer = AsleepTimer}) ->
 -compile({inline, [shutdown/2, shutdown/3]}).
 shutdown(Reason, State) ->
     ?LOG(error, "shutdown due to ~p", [Reason], State),
-    stop({shutdown, Reason}, State).
+    stop(Reason, State).
 
 shutdown(Reason, Reply, State) ->
     ?LOG(error, "shutdown due to ~p", [Reason], State),
-    stop({shutdown, Reason}, Reply, State).
+    stop(Reason, Reply, State).
 
 -compile({inline, [stop/2, stop/3]}).
+stop({shutdown, Reason}, State) ->
+    stop(Reason, State);
 stop(Reason, State) ->
     case Reason of
         %% FIXME: The Will-Msg should publish when a Session terminated!
-        asleep_timeout                    -> do_publish_will(State);
+        asleep_timeout -> do_publish_will(State);
-        {shutdown, keepalive_timeout}     -> do_publish_will(State);
+        keepalive_timeout -> do_publish_will(State);
-        _                                 -> ok
+        _ -> ok
     end,
-    {stop, Reason, State}.
+    {stop, {shutdown, Reason}, State}.
 
+stop({shutdown, Reason}, Reply, State) ->
+    stop(Reason, Reply, State);
 stop(Reason, Reply, State) ->
     {stop, Reason, Reply, State}.