Stage 6

src/handlers/handler_banned_words.erl

@@ -0,0 +1,86 @@
+-module(handler_banned_words).
+-include("records.hrl").
+
+-export([init/2]).
+
+init(Req, Opts) ->
+  handle(Req, Opts).
+
+handle(Req, _Opts) ->
+  case cowboy_req:method(Req) of
+    <<"GET">> -> list_banned_words(Req);
+    <<"POST">> -> add_banned_word(Req);
+    <<"DELETE">> -> remove_banned_word(Req);
+    _ -> send_error(Req, 405, <<"Method not allowed">>)
+  end.
+
+%% GET /v1/admin/banned-words - список запрещённых слов
+list_banned_words(Req) ->
+  case handler_auth:authenticate(Req) of
+    {ok, AdminId, Req1} ->
+      case logic_moderation:list_banned_words(AdminId) of
+        {ok, Words} ->
+          send_json(Req1, 200, Words);
+        {error, access_denied} ->
+          send_error(Req1, 403, <<"Admin access required">>);
+        {error, _} ->
+          send_error(Req1, 500, <<"Internal server error">>)
+      end;
+    {error, Code, Message, Req1} ->
+      send_error(Req1, Code, Message)
+  end.
+
+%% POST /v1/admin/banned-words - добавить запрещённое слово
+add_banned_word(Req) ->
+  case handler_auth:authenticate(Req) of
+    {ok, AdminId, Req1} ->
+      {ok, Body, Req2} = cowboy_req:read_body(Req1),
+      try jsx:decode(Body, [return_maps]) of
+        #{<<"word">> := Word} ->
+          case logic_moderation:add_banned_word(AdminId, Word) of
+            {ok, _} ->
+              send_json(Req2, 201, #{word => Word, status => <<"added">>});
+            {error, already_exists} ->
+              send_error(Req2, 409, <<"Word already exists">>);
+            {error, access_denied} ->
+              send_error(Req2, 403, <<"Admin access required">>);
+            {error, _} ->
+              send_error(Req2, 500, <<"Internal server error">>)
+          end;
+        _ ->
+          send_error(Req2, 400, <<"Missing 'word' field">>)
+      catch
+        _:_ ->
+          send_error(Req2, 400, <<"Invalid JSON format">>)
+      end;
+    {error, Code, Message, Req1} ->
+      send_error(Req1, Code, Message)
+  end.
+
+%% DELETE /v1/admin/banned-words - удалить запрещённое слово
+remove_banned_word(Req) ->
+  case handler_auth:authenticate(Req) of
+    {ok, AdminId, Req1} ->
+      Word = cowboy_req:binding(word, Req1),
+      case logic_moderation:remove_banned_word(AdminId, Word) of
+        {ok, removed} ->
+          send_json(Req1, 200, #{word => Word, status => <<"removed">>});
+        {error, not_found} ->
+          send_error(Req1, 404, <<"Word not found">>);
+        {error, access_denied} ->
+          send_error(Req1, 403, <<"Admin access required">>);
+        {error, _} ->
+          send_error(Req1, 500, <<"Internal server error">>)
+      end;
+    {error, Code, Message, Req1} ->
+      send_error(Req1, Code, Message)
+  end.
+
+%% Вспомогательные функции
+send_json(Req, Status, Data) ->
+  Body = jsx:encode(Data),
+  cowboy_req:reply(Status, #{<<"content-type">> => <<"application/json">>}, Body, Req).
+
+send_error(Req, Status, Message) ->
+  Body = jsx:encode(#{error => Message}),
+  cowboy_req:reply(Status, #{<<"content-type">> => <<"application/json">>}, Body, Req).