Refactor structure

src/handlers/admin/admin_handler_user_by_id.erl

@@ -0,0 +1,129 @@
+-module(admin_handler_user_by_id).
+-include("records.hrl").
+
+-export([init/2]).
+-export([user_to_json/1, convert_updates/1]).
+
+init(Req, Opts) ->
+  handle(Req, Opts).
+
+handle(Req, _Opts) ->
+  case cowboy_req:method(Req) of
+    <<"GET">> -> get_user(Req);
+    <<"PUT">> -> update_user(Req);
+    <<"DELETE">> -> delete_user(Req);
+    _ -> send_error(Req, 405, <<"Method not allowed">>)
+  end.
+
+get_user(Req) ->
+  case handler_auth:authenticate(Req) of
+    {ok, AdminId, Req1} ->
+      case is_admin(AdminId) of
+        true ->
+          UserId = cowboy_req:binding(id, Req1),
+          case core_user:get_by_id(UserId) of
+            {ok, User} ->
+              case User#user.status of
+                deleted -> send_error(Req1, 404, <<"User not found">>);
+                _ -> send_json(Req1, 200, user_to_json(User))
+              end;
+            {error, not_found} ->
+              send_error(Req1, 404, <<"User not found">>)
+          end;
+        false ->
+          send_error(Req1, 403, <<"Admin access required">>)
+      end;
+    {error, Code, Message, Req1} ->
+      send_error(Req1, Code, Message)
+  end.
+
+update_user(Req) ->
+  case handler_auth:authenticate(Req) of
+    {ok, AdminId, Req1} ->
+      case is_admin(AdminId) of
+        true ->
+          UserId = cowboy_req:binding(id, Req1),
+          {ok, Body, Req2} = cowboy_req:read_body(Req1),
+          try jsx:decode(Body, [return_maps]) of
+            Decoded when is_map(Decoded) ->
+              Updates = maps:to_list(Decoded),
+              % Преобразуем бинарные значения в атомы где нужно
+              ConvertedUpdates = convert_updates(Updates),
+              case core_user:update(UserId, ConvertedUpdates) of
+                {ok, User} ->
+                  send_json(Req2, 200, user_to_json(User));
+                {error, not_found} ->
+                  send_error(Req2, 404, <<"User not found">>);
+                {error, _} ->
+                  send_error(Req2, 500, <<"Internal server error">>)
+              end;
+            _ ->
+              send_error(Req2, 400, <<"Invalid JSON">>)
+          catch
+            _:_ -> send_error(Req2, 400, <<"Invalid JSON format">>)
+          end;
+        false ->
+          send_error(Req1, 403, <<"Admin access required">>)
+      end;
+    {error, Code, Message, Req1} ->
+      send_error(Req1, Code, Message)
+  end.
+
+convert_updates(Updates) ->
+  lists:map(fun
+              ({<<"status">>, <<"active">>}) -> {status, active};
+              ({<<"status">>, <<"frozen">>}) -> {status, frozen};
+              ({<<"status">>, <<"deleted">>}) -> {status, deleted};
+              ({<<"role">>, <<"user">>}) -> {role, user};
+              ({<<"role">>, <<"admin">>}) -> {role, admin};
+              (Other) -> Other
+            end, Updates).
+
+delete_user(Req) ->
+  case handler_auth:authenticate(Req) of
+    {ok, AdminId, Req1} ->
+      case is_admin(AdminId) of
+        true ->
+          UserId = cowboy_req:binding(id, Req1),
+          case core_user:delete(UserId) of
+            {ok, _} ->
+              send_json(Req1, 200, #{status => <<"deleted">>});
+            {error, not_found} ->
+              send_error(Req1, 404, <<"User not found">>)
+          end;
+        false ->
+          send_error(Req1, 403, <<"Admin access required">>)
+      end;
+    {error, Code, Message, Req1} ->
+      send_error(Req1, Code, Message)
+  end.
+
+is_admin(UserId) ->
+  case core_user:get_by_id(UserId) of
+    {ok, User} -> User#user.role =:= admin;
+    _ -> false
+  end.
+
+user_to_json(User) ->
+  #{
+    id => User#user.id,
+    email => User#user.email,
+    role => User#user.role,
+    status => User#user.status,
+    created_at => datetime_to_iso8601(User#user.created_at),
+    updated_at => datetime_to_iso8601(User#user.updated_at)
+  }.
+
+datetime_to_iso8601({{Year, Month, Day}, {Hour, Minute, Second}}) ->
+  iolist_to_binary(io_lib:format("~4..0B-~2..0B-~2..0BT~2..0B:~2..0B:~2..0BZ",
+    [Year, Month, Day, Hour, Minute, Second])).
+
+send_json(Req, Status, Data) ->
+  Body = jsx:encode(Data),
+  cowboy_req:reply(Status, #{<<"content-type">> => <<"application/json">>}, Body, Req),
+  {ok, Body, []}.
+
+send_error(Req, Status, Message) ->
+  Body = jsx:encode(#{error => Message}),
+  cowboy_req:reply(Status, #{<<"content-type">> => <<"application/json">>}, Body, Req),
+  {ok, Body, []}.