From 1a8b59045b8439360f0a4a4300b8bdf3819e7f3c Mon Sep 17 00:00:00 2001
From: firest <enlanubo@gmail.com>
Date: Fri, 8 Dec 2023 20:55:20 +0800
Subject: [PATCH] fix(gbt): Add unimplemented command call

---
 .../src/emqx_gbt32960_channel.erl             | 25 +++++++++++++------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/apps/emqx_gateway_gbt32960/src/emqx_gbt32960_channel.erl b/apps/emqx_gateway_gbt32960/src/emqx_gbt32960_channel.erl
index 5cb65f104..65a696a16 100644
--- a/apps/emqx_gateway_gbt32960/src/emqx_gbt32960_channel.erl
+++ b/apps/emqx_gateway_gbt32960/src/emqx_gbt32960_channel.erl
@@ -51,6 +51,8 @@
     inflight :: emqx_inflight:inflight(),
     %% Message Queue
     mqueue :: queue:queue(),
+    %% Subscriptions
+    subscriptions :: map(),
     retx_interval,
     retx_max_times,
     max_mqueue_len
@@ -115,7 +117,7 @@ stats(#channel{inflight = Inflight, mqueue = Queue}) ->
     %% XXX: A fake stats for managed by emqx_management
     [
         {subscriptions_cnt, 1},
-        {subscriptions_max, 0},
+        {subscriptions_max, 1},
         {inflight_cnt, emqx_inflight:size(Inflight)},
         {inflight_max, emqx_inflight:max_size(Inflight)},
         {mqueue_len, queue:len(Queue)},
@@ -181,6 +183,7 @@ init(
         clientinfo = ClientInfo,
         inflight = emqx_inflight:new(1),
         mqueue = queue:new(),
+        subscriptions = #{},
         timers = #{},
         conn_state = idle,
         retx_interval = RetxInterv,
@@ -370,9 +373,15 @@ handle_call(kick, _From, Channel) ->
     disconnect_and_shutdown(kicked, ok, Channel1);
 handle_call(discard, _From, Channel) ->
     disconnect_and_shutdown(discarded, ok, Channel);
+handle_call({subscribe, _Topic, _SubOpts}, _From, Channel) ->
+    reply({error, not_support}, Channel);
+handle_call({unsubscribe, _Topic}, _From, Channel) ->
+    reply({error, not_found}, Channel);
+handle_call(subscriptions, _From, Channel = #channel{subscriptions = Subscriptions}) ->
+    reply({ok, maps:to_list(Subscriptions)}, Channel);
 handle_call(Req, _From, Channel) ->
     log(error, #{msg => "unexpected_call", call => Req}, Channel),
-    reply(ignored, Channel).
+    reply({error, unexpected_call}, Channel).
 
 %%--------------------------------------------------------------------
 %% Handle cast
@@ -606,8 +615,8 @@ process_connect(
         )
     of
         {ok, #{session := Session}} ->
-            NChannel = Channel#channel{session = Session},
-            subscribe_downlink(?DEFAULT_DOWNLINK_TOPIC, Channel),
+            NChannel0 = Channel#channel{session = Session},
+            NChannel = subscribe_downlink(?DEFAULT_DOWNLINK_TOPIC, NChannel0),
             _ = upstreaming(Frame, NChannel),
             %% XXX: connection_accepted is not defined by stomp protocol
             _ = run_hooks(Ctx, 'client.connack', [ConnInfo, connection_accepted, #{}]),
@@ -854,11 +863,13 @@ subscribe_downlink(
                 #{
                     clientid := ClientId,
                     mountpoint := Mountpoint
-                }
-    }
+                },
+        subscriptions = Subscriptions
+    } = Channel
 ) ->
     {ParsedTopic, SubOpts0} = emqx_topic:parse(Topic),
     SubOpts = maps:merge(emqx_gateway_utils:default_subopts(), SubOpts0),
     MountedTopic = emqx_mountpoint:mount(Mountpoint, ParsedTopic),
     _ = emqx_broker:subscribe(MountedTopic, ClientId, SubOpts),
-    run_hooks(Ctx, 'session.subscribed', [ClientInfo, MountedTopic, SubOpts]).
+    run_hooks(Ctx, 'session.subscribed', [ClientInfo, MountedTopic, SubOpts]),
+    Channel#channel{subscriptions = Subscriptions#{MountedTopic => SubOpts}}.