refactor(authn_api): add 'after related' for move api

apps/emqx/include/emqx_authentication.hrl

@@ -28,4 +28,10 @@
 %% and emqx_conf_schema for an examples
 -define(EMQX_AUTHENTICATION_SCHEMA_MODULE_PT_KEY, emqx_authentication_schema_module).
 
+%% authentication move cmd
+-define(CMD_MOVE_TOP, top).
+-define(CMD_MOVE_BOTTOM, bottom).
+-define(CMD_MOVE_BEFORE(Before), {before, Before}).
+-define(CMD_MOVE_AFTER(After), {'after', After}).
+
 -endif.

apps/emqx/src/emqx_authentication.erl

@@ -100,7 +100,7 @@
 
 -type chain_name() :: atom().
 -type authenticator_id() :: binary().
--type position() :: top | bottom | {before, authenticator_id()}.
+-type position() :: top | bottom | {before, authenticator_id()} | {'after', authenticator_id()}.
 -type authn_type() :: atom() | {atom(), atom()}.
 -type provider() :: module().
 
@@ -695,21 +695,29 @@ do_move_authenticator(ID, Authenticators, Position) ->
             {error, {not_found, {authenticator, ID}}};
         {value, Authenticator, NAuthenticators} ->
             case Position of
-                top ->
+                ?CMD_MOVE_TOP ->
                     {ok, [Authenticator | NAuthenticators]};
-                bottom ->
+                ?CMD_MOVE_BOTTOM ->
                     {ok, NAuthenticators ++ [Authenticator]};
-                {before, ID0} ->
-                    insert(Authenticator, NAuthenticators, ID0, [])
+                ?CMD_MOVE_BEFORE(RelatedID) ->
+                    insert(Authenticator, NAuthenticators, ?CMD_MOVE_BEFORE(RelatedID), []);
+                ?CMD_MOVE_AFTER(RelatedID) ->
+                    insert(Authenticator, NAuthenticators, ?CMD_MOVE_AFTER(RelatedID), [])
             end
     end.
 
-insert(_, [], ID, _) ->
-    {error, {not_found, {authenticator, ID}}};
-insert(Authenticator, [#authenticator{id = ID} | _] = Authenticators, ID, Acc) ->
-    {ok, lists:reverse(Acc) ++ [Authenticator | Authenticators]};
-insert(Authenticator, [Authenticator0 | More], ID, Acc) ->
-    insert(Authenticator, More, ID, [Authenticator0 | Acc]).
+insert(_, [], {_, RelatedID}, _) ->
+    {error, {not_found, {authenticator, RelatedID}}};
+insert(Authenticator, [#authenticator{id = RelatedID} = Related | Rest],
+       {Relative, RelatedID}, Acc) ->
+    case Relative of
+        before ->
+            {ok, lists:reverse(Acc) ++ [Authenticator, Related | Rest]};
+        'after' ->
+            {ok, lists:reverse(Acc) ++ [Related, Authenticator | Rest]}
+    end;
+insert(Authenticator, [Authenticator0 | More], {Relative, RelatedID}, Acc) ->
+    insert(Authenticator, More, {Relative, RelatedID}, [Authenticator0 | Acc]).
 
 update_chain(ChainName, UpdateFun) ->
     case ets:lookup(?CHAINS_TAB, ChainName) of

apps/emqx/src/emqx_authentication_config.erl

@@ -87,24 +87,36 @@ do_pre_config_update({update_authenticator, ChainName, AuthenticatorID, Config},
 do_pre_config_update({move_authenticator, _ChainName, AuthenticatorID, Position}, OldConfig) ->
     case split_by_id(AuthenticatorID, OldConfig) of
         {error, Reason} -> {error, Reason};
-        {ok, Part1, [Found | Part2]} ->
+        {ok, BeforeFound, [Found | AfterFound]} ->
             case Position of
-                top ->
-                    {ok, [Found | Part1] ++ Part2};
-                bottom ->
-                    {ok, Part1 ++ Part2 ++ [Found]};
-                {before, Before} ->
-                    case split_by_id(Before, Part1 ++ Part2) of
+                ?CMD_MOVE_TOP ->
+                    {ok, [Found | BeforeFound] ++ AfterFound};
+                ?CMD_MOVE_BOTTOM ->
+                    {ok, BeforeFound ++ AfterFound ++ [Found]};
+                ?CMD_MOVE_BEFORE(BeforeRelatedID) ->
+                    case split_by_id(BeforeRelatedID, BeforeFound ++ AfterFound) of
                         {error, Reason} ->
                             {error, Reason};
-                        {ok, NPart1, [NFound | NPart2]} ->
-                            {ok, NPart1 ++ [Found, NFound | NPart2]}
+                        {ok, BeforeNFound, [FoundRelated | AfterNFound]} ->
+                            {ok, BeforeNFound ++ [Found, FoundRelated | AfterNFound]}
+                    end;
+                ?CMD_MOVE_AFTER(AfterRelatedID) ->
+                    case split_by_id(AfterRelatedID, BeforeFound ++ AfterFound) of
+                        {error, Reason} ->
+                            {error, Reason};
+                        {ok, BeforeNFound, [FoundRelated | AfterNFound]} ->
+                            {ok, BeforeNFound ++ [FoundRelated, Found | AfterNFound]}
                     end
             end
     end.
 
--spec post_config_update(list(atom()), update_request(), map() | list(), emqx_config:raw_config(), emqx_config:app_envs())
-    -> ok | {ok, map()} | {error, term()}.
+-spec post_config_update(list(atom()),
+                         update_request(),
+                         map() | list(),
+                         emqx_config:raw_config(),
+                         emqx_config:app_envs()
+                        )
+                        -> ok | {ok, map()} | {error, term()}.
 post_config_update(_, UpdateReq, NewConfig, OldConfig, AppEnvs) ->
     do_post_config_update(UpdateReq, check_configs(to_list(NewConfig)), OldConfig, AppEnvs).
 
@@ -112,7 +124,8 @@ do_post_config_update({create_authenticator, ChainName, Config}, NewConfig, _Old
     NConfig = get_authenticator_config(authenticator_id(Config), NewConfig),
     _ = emqx_authentication:create_chain(ChainName),
     emqx_authentication:create_authenticator(ChainName, NConfig);
-do_post_config_update({delete_authenticator, ChainName, AuthenticatorID}, _NewConfig, OldConfig, _AppEnvs) ->
+do_post_config_update({delete_authenticator, ChainName, AuthenticatorID},
+                      _NewConfig, OldConfig, _AppEnvs) ->
     case emqx_authentication:delete_authenticator(ChainName, AuthenticatorID) of
         ok ->
             Config = get_authenticator_config(AuthenticatorID, to_list(OldConfig)),
@@ -121,14 +134,16 @@ do_post_config_update({delete_authenticator, ChainName, AuthenticatorID}, _NewCo
         {error, Reason} ->
             {error, Reason}
     end;
-do_post_config_update({update_authenticator, ChainName, AuthenticatorID, Config}, NewConfig, _OldConfig, _AppEnvs) ->
+do_post_config_update({update_authenticator, ChainName, AuthenticatorID, Config},
+                      NewConfig, _OldConfig, _AppEnvs) ->
     case get_authenticator_config(authenticator_id(Config), NewConfig) of
         {error, not_found} ->
             {error, {not_found, {authenticator, AuthenticatorID}}};
         NConfig ->
             emqx_authentication:update_authenticator(ChainName, AuthenticatorID, NConfig)
     end;
-do_post_config_update({move_authenticator, ChainName, AuthenticatorID, Position}, _NewConfig, _OldConfig, _AppEnvs) ->
+do_post_config_update({move_authenticator, ChainName, AuthenticatorID, Position},
+                      _NewConfig, _OldConfig, _AppEnvs) ->
     emqx_authentication:move_authenticator(ChainName, AuthenticatorID, Position).
 
 check_configs(Configs) ->

apps/emqx_authn/src/emqx_authn_api.erl

@@ -1060,11 +1060,17 @@ serialize_error(Reason) ->
             message => binfmt("~p", [Reason])}}.
 
 parse_position(<<"top">>) ->
-    {ok, top};
+    {ok, ?CMD_MOVE_TOP};
 parse_position(<<"bottom">>) ->
-    {ok, bottom};
+    {ok, ?CMD_MOVE_BOTTOM};
+parse_position(<<"before:">>) ->
+    {error, {invalid_parameter, position}};
+parse_position(<<"after:">>) ->
+    {error, {invalid_parameter, position}};
 parse_position(<<"before:", Before/binary>>) ->
-    {ok, {before, Before}};
+    {ok, ?CMD_MOVE_BEFORE(Before)};
+parse_position(<<"after:", After/binary>>) ->
+    {ok, ?CMD_MOVE_AFTER(After)};
 parse_position(_) ->
     {error, {invalid_parameter, position}}.