Reject clan invites when IsBotAccount

Also make it possible for quite rare situation of ASF accepting invite to SteamMasterClanID if it couldn't join due to group being non-public

ArchiSteamFarm/ArchiHandler.cs

@@ -29,6 +29,7 @@
 using System.Linq;
 using System.Net;
 using System.Threading.Tasks;
+using ArchiSteamFarm.CMsgs;
 using SteamKit2;
 using SteamKit2.Internal;
 
@@ -212,6 +213,24 @@ internal sealed class ArchiHandler : ClientMsgHandler {
 			}
 		}
 
+		internal void AcceptClanInvite(ulong clanID, bool accept) {
+			if (clanID == 0) {
+				ArchiLogger.LogNullError(nameof(clanID));
+				return;
+			}
+
+			if (!Client.IsConnected) {
+				return;
+			}
+
+			ClientMsg<CMsgClientClanInviteAction> request = new ClientMsg<CMsgClientClanInviteAction>();
+
+			request.Body.ClanID = clanID;
+			request.Body.AcceptInvite = accept;
+
+			Client.Send(request);
+		}
+
 		private void HandleFSOfflineMessageNotification(IPacketMsg packetMsg) {
 			if (packetMsg == null) {
 				ArchiLogger.LogNullError(nameof(packetMsg));

ArchiSteamFarm/ArchiSteamFarm.csproj

@@ -116,6 +116,7 @@
     <Compile Include="ASF.cs" />
     <Compile Include="Bot.cs" />
     <Compile Include="BotConfig.cs" />
+    <Compile Include="CMsgs\CMsgClientClanInviteAction.cs" />
     <Compile Include="ConcurrentEnumerator.cs" />
     <Compile Include="ConcurrentHashSet.cs" />
     <Compile Include="CryptoHelper.cs" />

ArchiSteamFarm/Bot.cs

@@ -799,6 +799,15 @@ internal sealed class Bot : IDisposable {
 			return false;
 		}
 
+		private bool IsMasterClanID(ulong steamID) {
+			if (steamID != 0) {
+				return steamID == BotConfig.SteamMasterClanID;
+			}
+
+			ArchiLogger.LogNullError(nameof(steamID));
+			return false;
+		}
+
 		private static bool IsOwner(ulong steamID) {
 			if (steamID != 0) {
 				return (steamID == Program.GlobalConfig.SteamOwnerID) || (Debugging.IsDebugBuild && (steamID == SharedInfo.ArchiSteamID));
@@ -1095,10 +1104,18 @@ internal sealed class Bot : IDisposable {
 			}
 
 			foreach (SteamFriends.FriendsListCallback.Friend friend in callback.FriendList.Where(friend => friend.Relationship == EFriendRelationship.RequestRecipient)) {
-				if (IsMaster(friend.SteamID)) {
-					SteamFriends.AddFriend(friend.SteamID);
-				} else if (BotConfig.IsBotAccount) {
-					SteamFriends.RemoveFriend(friend.SteamID);
+				if (friend.SteamID.AccountType == EAccountType.Clan) {
+					if (IsMasterClanID(friend.SteamID)) {
+						ArchiHandler.AcceptClanInvite(friend.SteamID, true);
+					} else if (BotConfig.IsBotAccount) {
+						ArchiHandler.AcceptClanInvite(friend.SteamID, false);
+					}
+				} else {
+					if (IsMaster(friend.SteamID)) {
+						SteamFriends.AddFriend(friend.SteamID);
+					} else if (BotConfig.IsBotAccount) {
+						SteamFriends.RemoveFriend(friend.SteamID);
+					}
 				}
 			}
 		}

ArchiSteamFarm/CMsgs/CMsgClientClanInviteAction.cs

@@ -0,0 +1,58 @@
+/*
+    _                _      _  ____   _                           _____
+   / \    _ __  ___ | |__  (_)/ ___| | |_  ___   __ _  _ __ ___  |  ___|__ _  _ __  _ __ ___
+  / _ \  | '__|/ __|| '_ \ | |\___ \ | __|/ _ \ / _` || '_ ` _ \ | |_  / _` || '__|| '_ ` _ \
+ / ___ \ | |  | (__ | | | || | ___) || |_|  __/| (_| || | | | | ||  _|| (_| || |   | | | | | |
+/_/   \_\|_|   \___||_| |_||_||____/  \__|\___| \__,_||_| |_| |_||_|   \__,_||_|   |_| |_| |_|
+
+ Copyright 2015-2016 Łukasz "JustArchi" Domeradzki
+ Contact: JustArchi@JustArchi.net
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+					
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+*/
+
+using System.IO;
+using SteamKit2;
+using SteamKit2.Internal;
+
+namespace ArchiSteamFarm.CMsgs {
+	internal sealed class CMsgClientClanInviteAction : ISteamSerializableMessage {
+		internal bool AcceptInvite { private get; set; }
+		internal ulong ClanID { private get; set; }
+
+		void ISteamSerializable.Deserialize(Stream stream) {
+			if (stream == null) {
+				ASF.ArchiLogger.LogNullError(nameof(stream));
+				return;
+			}
+
+			BinaryReader binaryReader = new BinaryReader(stream);
+			ClanID = binaryReader.ReadUInt64();
+			AcceptInvite = binaryReader.ReadBoolean();
+		}
+
+		EMsg ISteamSerializableMessage.GetEMsg() => EMsg.ClientAcknowledgeClanInvite;
+
+		void ISteamSerializable.Serialize(Stream stream) {
+			if (stream == null) {
+				ASF.ArchiLogger.LogNullError(nameof(stream));
+				return;
+			}
+
+			BinaryWriter binaryWriter = new BinaryWriter(stream);
+			binaryWriter.Write(ClanID);
+			binaryWriter.Write(AcceptInvite);
+		}
+	}
+}

GUI/GUI.csproj

@@ -103,6 +103,9 @@
     <Compile Include="..\ArchiSteamFarm\CardsFarmer.cs">
       <Link>CardsFarmer.cs</Link>
     </Compile>
+    <Compile Include="..\ArchiSteamFarm\CMsgs\CMsgClientClanInviteAction.cs">
+      <Link>CMsgs\CMsgClientClanInviteAction.cs</Link>
+    </Compile>
     <Compile Include="..\ArchiSteamFarm\ConcurrentEnumerator.cs">
       <Link>ConcurrentEnumerator.cs</Link>
     </Compile>