fix(bridge_api): don't mangle configs, use correct type as argument

Fixes https://emqx.atlassian.net/browse/EMQX-11412

- The wrong type was being used in a list lookup function, resulting in the automatic
transformation being called erroneously and mangling the config.
- There was a left-over workaround still around which could still mangle the config.

apps/emqx_bridge/src/emqx_bridge.erl

@@ -313,7 +313,6 @@ list() ->
     BridgeV2Bridges =
         emqx_bridge_v2:bridge_v1_list_and_transform(),
     BridgeV1Bridges ++ BridgeV2Bridges.
-%%BridgeV2Bridges = emqx_bridge_v2:list().
 
 lookup(Id) ->
     {Type, Name} = emqx_bridge_resource:parse_bridge_id(Id),

apps/emqx_bridge/src/emqx_bridge_api.erl

@@ -900,7 +900,7 @@ format_resource(
         case emqx_bridge_v2:is_bridge_v2_type(Type) of
             true ->
                 %% The defaults are already filled in
-                downgrade_raw_conf(Type, RawConf);
+                RawConf;
             false ->
                 fill_defaults(Type, RawConf)
         end,
@@ -1164,19 +1164,3 @@ upgrade_type(Type) ->
 
 downgrade_type(Type) ->
     emqx_bridge_lib:downgrade_type(Type).
-
-%% TODO: move it to callback
-downgrade_raw_conf(kafka_producer, RawConf) ->
-    rename(<<"parameters">>, <<"kafka">>, RawConf);
-downgrade_raw_conf(azure_event_hub_producer, RawConf) ->
-    rename(<<"parameters">>, <<"kafka">>, RawConf);
-downgrade_raw_conf(_Type, RawConf) ->
-    RawConf.
-
-rename(OldKey, NewKey, Map) ->
-    case maps:find(OldKey, Map) of
-        {ok, Value} ->
-            maps:remove(OldKey, maps:put(NewKey, Value, Map));
-        error ->
-            Map
-    end.

apps/emqx_bridge/src/emqx_bridge_v2.erl

@@ -1063,17 +1063,17 @@ bridge_v1_list_and_transform() ->
     Bridges = list_with_lookup_fun(fun bridge_v1_lookup_and_transform/2),
     [B || B <- Bridges, B =/= not_bridge_v1_compatible_error()].
 
-bridge_v1_lookup_and_transform(BridgeV1Type, Name) ->
+bridge_v1_lookup_and_transform(ActionType, Name) ->
+    BridgeV1Type = ?MODULE:bridge_v2_type_to_bridge_v1_type(ActionType),
     case ?MODULE:bridge_v1_is_valid(BridgeV1Type, Name) of
         true ->
-            Type = ?MODULE:bridge_v1_type_to_bridge_v2_type(BridgeV1Type),
-            case lookup(Type, Name) of
+            case lookup(ActionType, Name) of
                 {ok, #{raw_config := #{<<"connector">> := ConnectorName}} = BridgeV2} ->
-                    ConnectorType = connector_type(Type),
+                    ConnectorType = connector_type(ActionType),
                     case emqx_connector:lookup(ConnectorType, ConnectorName) of
                         {ok, Connector} ->
                             bridge_v1_lookup_and_transform_helper(
-                                BridgeV1Type, Name, Type, BridgeV2, ConnectorType, Connector
+                                BridgeV1Type, Name, ActionType, BridgeV2, ConnectorType, Connector
                             );
                         Error ->
                             Error
@@ -1089,7 +1089,7 @@ not_bridge_v1_compatible_error() ->
     {error, not_bridge_v1_compatible}.
 
 bridge_v1_lookup_and_transform_helper(
-    BridgeV1Type, BridgeName, BridgeV2Type, BridgeV2, ConnectorType, Connector
+    BridgeV1Type, BridgeName, ActionType, Action, ConnectorType, Connector
 ) ->
     ConnectorRawConfig1 = maps:get(raw_config, Connector),
     ConnectorRawConfig2 = fill_defaults(
@@ -1098,10 +1098,10 @@ bridge_v1_lookup_and_transform_helper(
         <<"connectors">>,
         emqx_connector_schema
     ),
-    BridgeV2RawConfig1 = maps:get(raw_config, BridgeV2),
-    BridgeV2RawConfig2 = fill_defaults(
-        BridgeV2Type,
-        BridgeV2RawConfig1,
+    ActionRawConfig1 = maps:get(raw_config, Action),
+    ActionRawConfig2 = fill_defaults(
+        ActionType,
+        ActionRawConfig1,
         <<"actions">>,
         emqx_bridge_v2_schema
     ),
@@ -1110,7 +1110,7 @@ bridge_v1_lookup_and_transform_helper(
             emqx_action_info:has_custom_connector_action_config_to_bridge_v1_config(BridgeV1Type)
         of
             false ->
-                BridgeV1Config1 = maps:remove(<<"connector">>, BridgeV2RawConfig2),
+                BridgeV1Config1 = maps:remove(<<"connector">>, ActionRawConfig2),
                 %% Move parameters to the top level
                 ParametersMap = maps:get(<<"parameters">>, BridgeV1Config1, #{}),
                 BridgeV1Config2 = maps:remove(<<"parameters">>, BridgeV1Config1),
@@ -1118,13 +1118,13 @@ bridge_v1_lookup_and_transform_helper(
                 emqx_utils_maps:deep_merge(ConnectorRawConfig2, BridgeV1Config3);
             true ->
                 emqx_action_info:connector_action_config_to_bridge_v1_config(
-                    BridgeV1Type, ConnectorRawConfig2, BridgeV2RawConfig2
+                    BridgeV1Type, ConnectorRawConfig2, ActionRawConfig2
                 )
         end,
-    BridgeV1Tmp = maps:put(raw_config, BridgeV1ConfigFinal, BridgeV2),
+    BridgeV1Tmp = maps:put(raw_config, BridgeV1ConfigFinal, Action),
     BridgeV1 = maps:remove(status, BridgeV1Tmp),
-    BridgeV2Status = maps:get(status, BridgeV2, undefined),
-    BridgeV2Error = maps:get(error, BridgeV2, undefined),
+    BridgeV2Status = maps:get(status, Action, undefined),
+    BridgeV2Error = maps:get(error, Action, undefined),
     ResourceData1 = maps:get(resource_data, BridgeV1, #{}),
     %% Replace id in resouce data
     BridgeV1Id = <<"bridge:", (bin(BridgeV1Type))/binary, ":", (bin(BridgeName))/binary>>,

apps/emqx_bridge/test/emqx_bridge_testlib.erl

@@ -120,6 +120,22 @@ create_bridge(Config, Overrides) ->
     ct:pal("creating bridge with config: ~p", [BridgeConfig]),
     emqx_bridge:create(BridgeType, BridgeName, BridgeConfig).
 
+list_bridges_api() ->
+    Params = [],
+    Path = emqx_mgmt_api_test_util:api_path(["bridges"]),
+    AuthHeader = emqx_mgmt_api_test_util:auth_header_(),
+    Opts = #{return_all => true},
+    ct:pal("listing bridges (via http)"),
+    Res =
+        case emqx_mgmt_api_test_util:request_api(get, Path, "", AuthHeader, Params, Opts) of
+            {ok, {Status, Headers, Body0}} ->
+                {ok, {Status, Headers, emqx_utils_json:decode(Body0, [return_maps])}};
+            Error ->
+                Error
+        end,
+    ct:pal("list bridge result: ~p", [Res]),
+    Res.
+
 create_bridge_api(Config) ->
     create_bridge_api(Config, _Overrides = #{}).
 

apps/emqx_bridge/test/emqx_bridge_v2_testlib.erl

@@ -139,6 +139,7 @@ create_bridge(Config, Overrides) ->
     ConnectorName = ?config(connector_name, Config),
     ConnectorType = ?config(connector_type, Config),
     ConnectorConfig = ?config(connector_config, Config),
+    ct:pal("creating connector with config: ~p", [ConnectorConfig]),
     {ok, _} =
         emqx_connector:create(ConnectorType, ConnectorName, ConnectorConfig),
 

apps/emqx_bridge_azure_event_hub/test/emqx_bridge_azure_event_hub_v2_SUITE.erl

@@ -368,3 +368,12 @@ t_parameters_key_api_spec(_Config) ->
     ?assert(is_map_key(<<"parameters">>, ActionProps), #{action_props => ActionProps}),
 
     ok.
+
+t_http_api_get(Config) ->
+    ?assertMatch({ok, _}, emqx_bridge_v2_testlib:create_bridge(Config)),
+    %% v1 api; no mangling of configs; has `kafka' top level config key
+    ?assertMatch(
+        {ok, {{_, 200, _}, _, [#{<<"kafka">> := _}]}},
+        emqx_bridge_testlib:list_bridges_api()
+    ),
+    ok.

apps/emqx_bridge_kafka/test/emqx_bridge_v2_kafka_producer_SUITE.erl

@@ -369,3 +369,17 @@ t_parameters_key_api_spec(_Config) ->
     ?assert(is_map_key(<<"parameters">>, ActionProps), #{action_props => ActionProps}),
 
     ok.
+
+t_http_api_get(_Config) ->
+    ConnectorName = <<"test_connector">>,
+    ActionName = <<"test_action">>,
+    ActionConfig = bridge_v2_config(<<"test_connector">>),
+    ConnectorConfig = connector_config(),
+    ?assertMatch({ok, _}, create_connector(ConnectorName, ConnectorConfig)),
+    ?assertMatch({ok, _}, create_action(ActionName, ActionConfig)),
+    %% v1 api; no mangling of configs; has `kafka' top level config key
+    ?assertMatch(
+        {ok, {{_, 200, _}, _, [#{<<"kafka">> := _}]}},
+        emqx_bridge_testlib:list_bridges_api()
+    ),
+    ok.