fix(ds clients mgmt api): add more fields to disconnected durable sessions

Fixes https://emqx.atlassian.net/browse/EMQX-12369

apps/emqx/src/emqx_persistent_session_ds.erl

@@ -1182,7 +1182,12 @@ maybe_set_offline_info(S, Id) ->
     case emqx_cm:lookup_client({clientid, Id}) of
         [{_Key, ChannelInfo, Stats}] ->
             emqx_persistent_session_ds_state:set_offline_info(
-                #{chan_info => ChannelInfo, stats => Stats},
+                #{
+                    chan_info => ChannelInfo,
+                    stats => Stats,
+                    disconnected_at => erlang:system_time(millisecond),
+                    last_connected_to => node()
+                },
                 S
             );
         _ ->

apps/emqx_management/src/emqx_mgmt_api_clients.erl

@@ -1529,13 +1529,13 @@ do_persistent_session_query1(ResultAcc, QueryState, Iter0) ->
 
 check_for_live_and_expired(Rows) ->
     lists:filtermap(
-        fun({ClientId, Session}) ->
+        fun({ClientId, _Session}) ->
             case is_live_session(ClientId) of
                 true ->
                     false;
                 false ->
                     DSSession = emqx_persistent_session_ds_state:print_session(ClientId),
-                    {true, {ClientId, DSSession#{is_expired => is_expired(Session)}}}
+                    {true, {ClientId, DSSession}}
             end
         end,
         Rows
@@ -1755,18 +1755,32 @@ format_channel_info(undefined, {ClientId, PSInfo0 = #{}}, _Opts) ->
     format_persistent_session_info(ClientId, PSInfo0).
 
 format_persistent_session_info(
-    _ClientId, #{metadata := #{offline_info := #{chan_info := ChanInfo, stats := Stats}}} = PSInfo
+    _ClientId,
+    #{
+        metadata := #{offline_info := #{chan_info := ChanInfo, stats := Stats} = OfflineInfo} =
+            Metadata
+    } =
+        PSInfo
 ) ->
     Info0 = format_channel_info(_Node = undefined, {_Key = undefined, ChanInfo, Stats}, #{
         fields => all
     }),
-    Info0#{
-        connected => false,
-        durable => true,
-        is_persistent => true,
-        is_expired => maps:get(is_expired, PSInfo, false),
-        subscriptions_cnt => maps:size(maps:get(subscriptions, PSInfo, #{}))
-    };
+    LastConnectedToNode = maps:get(last_connected_to, OfflineInfo, undefined),
+    DisconnectedAt = maps:get(disconnected_at, OfflineInfo, undefined),
+    %% `created_at' and `connected_at' have already been formatted by this point.
+    Info = result_format_time_fun(
+        disconnected_at,
+        Info0#{
+            connected => false,
+            disconnected_at => DisconnectedAt,
+            durable => true,
+            is_persistent => true,
+            is_expired => is_expired(Metadata),
+            node => LastConnectedToNode,
+            subscriptions_cnt => maps:size(maps:get(subscriptions, PSInfo, #{}))
+        }
+    ),
+    result_format_undefined_to_null(Info);
 format_persistent_session_info(ClientId, PSInfo0) ->
     Metadata = maps:get(metadata, PSInfo0, #{}),
     {ProtoName, ProtoVer} = maps:get(protocol, Metadata),
@@ -1786,7 +1800,7 @@ format_persistent_session_info(ClientId, PSInfo0) ->
         connected_at => CreatedAt,
         durable => true,
         ip_address => IpAddress,
-        is_expired => maps:get(is_expired, PSInfo0, false),
+        is_expired => is_expired(Metadata),
         is_persistent => true,
         port => Port,
         heap_size => 0,

apps/emqx_management/test/emqx_mgmt_api_clients_SUITE.erl

@@ -581,14 +581,33 @@ t_persistent_sessions6(Config) ->
             %% Wait for session to be considered expired but not GC'ed
             ct:sleep(2_000),
             assert_single_client(O#{node => N1, clientid => ClientId, status => disconnected}),
+            N1Bin = atom_to_binary(N1),
             ?retry(
                 100,
                 20,
                 ?assertMatch(
-                    {ok, {{_, 200, _}, _, #{<<"data">> := [#{<<"is_expired">> := true}]}}},
+                    {ok,
+                        {{_, 200, _}, _, #{
+                            <<"data">> := [
+                                #{
+                                    <<"is_expired">> := true,
+                                    <<"node">> := N1Bin,
+                                    <<"disconnected_at">> := <<_/binary>>
+                                }
+                            ]
+                        }}},
                     list_request(APIPort)
                 )
             ),
+            ?assertMatch(
+                {ok,
+                    {{_, 200, _}, _, #{
+                        <<"is_expired">> := true,
+                        <<"node">> := N1Bin,
+                        <<"disconnected_at">> := <<_/binary>>
+                    }}},
+                get_client_request(APIPort, ClientId)
+            ),
 
             C2 = connect_client(#{port => Port1, clientid => ClientId}),
             disconnect_and_destroy_session(C2),