move to correct directory

modules/CustomChatAddOns/Handler/Config.cs

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+using BotFramework.Attributes;
+using Kruzya.TelegramBot.Core.Data;
+using Kruzya.TelegramBot.Core.Extensions;
+using Kruzya.TelegramBot.Core.Handler;
+using Kruzya.TelegramBot.Core.Service;
+using Kruzya.TelegramBot.CustomChatAddOns.Data;
+using Kruzya.TelegramBot.CustomChatAddOns.Options;
+using Kruzya.TelegramBot.CustomChatAddOns.Service;
+using Telegram.Bot.Types.Enums;
+
+namespace Kruzya.TelegramBot.CustomChatAddOns.Handler
+{
+    public class Config : CommonHandler
+    {
+        private readonly CustomChatHandler _option;
+        private readonly UserService _userService;
+        private readonly InteropService _interopService;
+
+        public Config(CustomChatHandler option, UserService userService, InteropService interopService, CoreContext db) : base(db)
+        {
+            _option = option;
+            _userService = userService;
+            _interopService = interopService;
+        }
+
+        private bool IsAllowedChatType(ChatType chatType)
+        {
+            // TODO: move to class constant.
+            var allowedChatTypes = new[] { ChatType.Supergroup, ChatType.Group, ChatType.Channel };
+            return allowedChatTypes.Contains(chatType);
+        }
+
+        [ParametrizedCommand("set_custom_handler")]
+        public async Task Handle(Uri endpoint)
+        {
+            if (!IsAllowedChatType(Chat.Type))
+            {
+                return;
+            }
+
+            if (!await Bot.IsUserAdminAsync(Chat, From))
+            {
+                await Reply("Sorry, you cannot do this");
+                return;
+            }
+
+            // URLs to somewhere in local bot network should be allowed for using only super-admins.
+            // It may be bypassed via using, for example, "kitties" instead of "kitties.bot.svc.cluster.local". Maybe check resulting IP?
+            if (endpoint.Host.EndsWith(".local") && !_userService.IsUserSuper(From.Id))
+            {
+                await Reply("Sorry, you cannot do this");
+                return;
+            }
+
+            try
+            {
+                var ping = Ping.From(Message!);
+                var pong = await _interopService.PostMessage<Ping, Pong>(endpoint.ToString(), ping);
+                if (pong.Confirmation != ping.Confirmation)
+                {
+                    throw new Exception("Invalid response");
+                }
+            }
+            // catch (HttpRequestException e)
+            catch (Exception e)
+            {
+                await Reply($"Sorry, this URL cannot be set as chat webhook: {e.Message}");
+                return;
+            }
+
+            await _option.SetValueAsync(Chat.Id, endpoint.ToString());
+            await Reply("Done, configured");
+        }
+    }
+}

modules/CustomChatAddOns/Handler/MessageHandler.cs

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+using BotFramework;
+using BotFramework.Attributes;
+using Kruzya.TelegramBot.CustomChatAddOns.Data;
+using Kruzya.TelegramBot.CustomChatAddOns.Data.WebhookCommand;
+using Kruzya.TelegramBot.CustomChatAddOns.Options;
+using Kruzya.TelegramBot.CustomChatAddOns.Service;
+
+namespace Kruzya.TelegramBot.CustomChatAddOns.Handler
+{
+    public class MessageHandler : BotEventHandler
+    {
+        private readonly CustomChatHandler _option;
+        private readonly InteropService _interopService;
+
+        public MessageHandler(CustomChatHandler option, InteropService interopService)
+        {
+            _option = option;
+            _interopService = interopService;
+        }
+
+        [Message]
+        [Priority(short.MinValue + 10)]
+        public async Task DeliverMessage()
+        {
+            var message = RawUpdate.Message;
+            if (message == null)
+            {
+                return;
+            }
+
+            var url = await _option.GetValueAsync(Chat.Id);
+            if (string.IsNullOrWhiteSpace(url))
+            {
+                return;
+            }
+
+            var commands = await _interopService.PostMessage<NewMessage, List<IWebhookCommand>>(url, new() { Message = message });
+            foreach (var command in commands)
+            {
+                await command.Execute(Bot, message);
+            }
+        }
+    }
+}