Big update.

src/strategy/actions/AcceptInvitationAction.cpp

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
+ */
+
+#include "AcceptInvitationAction.h"
+#include "Event.h"
+#include "Playerbots.h"
+#include "PlayerbotSecurity.h"
+
+bool AcceptInvitationAction::Execute(Event event)
+{
+    Group* grp = bot->GetGroupInvite();
+    if (!grp)
+        return false;
+
+    Player* inviter = ObjectAccessor::FindPlayer(grp->GetLeaderGUID());
+    if (!inviter)
+        return false;
+
+    if (!botAI->GetSecurity()->CheckLevelFor(PLAYERBOT_SECURITY_INVITE, false, inviter))
+    {
+        WorldPacket data(SMSG_GROUP_DECLINE, 10);
+        data << bot->GetName();
+        inviter->SendDirectMessage(&data);
+        bot->UninviteFromGroup();
+        return false;
+    }
+
+    WorldPacket p;
+    uint32 roles_mask = 0;
+    p << roles_mask;
+    bot->GetSession()->HandleGroupAcceptOpcode(p);
+
+    if (sRandomPlayerbotMgr->IsRandomBot(bot))
+        botAI->SetMaster(inviter);
+    //else
+        //sPlayerbotDbStore->Save(botAI);
+
+    botAI->ResetStrategies();
+    botAI->ChangeStrategy("+follow,-lfg,-bg", BOT_STATE_NON_COMBAT);
+    botAI->Reset();
+
+    botAI->TellMaster("Hello");
+    return true;
+}