Core/Instance : Fix instance resetting exploit (#23263)

* Push offline players out of instance

Push offline players out of instance when reseting dungeon with a raid mode group

* Add SQL request to character

Add a SQL request to update the position of a player in a specified map

* Teleport to graveyard instead

1 files changed, 34 insertions, 0 deletions

diff --git a/src/server/game/Groups/Group.cpp b/src/server/game/Groups/Group.cpp
index 24bc91aad16..b46fe069cfb 100644
--- a/src/server/game/Groups/Group.cpp
+++ b/src/server/game/Groups/Group.cpp
@@ -2172,7 +2172,41 @@ void Group::ResetInstances(uint8 method, bool isRaid, Player* SendMsgTo)
         {
             // do not reset the instance, just unbind if others are permanently bound to it
             if (isEmpty && instanceSave->CanReset())
+            {
+                if (map && this->isRaidGroup() && map->IsDungeon() && SendMsgTo)
+                {
+                    AreaTrigger const * const instanceEntrance = sObjectMgr->GetGoBackTrigger(map->GetId());
+
+                    if (!instanceEntrance)
+                        TC_LOG_DEBUG("root", "Instance entrance not found for maps %u", map->GetId());
+                    else
+                    {
+                        WorldSafeLocsEntry const * graveyardLocation = sObjectMgr->GetClosestGraveyard(instanceEntrance->target_X, instanceEntrance->target_Y, instanceEntrance->target_Z, instanceEntrance->target_mapId, SendMsgTo->GetTeam());;
+                        uint32 const zoneId = sMapMgr->GetZoneId(graveyardLocation->map_id, graveyardLocation->x, graveyardLocation->y, graveyardLocation->z);
+
+                        for (const MemberSlot &member : this->GetMemberSlots())
+                        {
+                            if (!ObjectAccessor::FindConnectedPlayer(member.guid))
+                            {
+                                PreparedStatement *stmt = CharacterDatabase.GetPreparedStatement(CHAR_UPD_CHARACTER_POSITION_BY_MAPID);
+
+                                stmt->setFloat(0, graveyardLocation->x);
+                                stmt->setFloat(1, graveyardLocation->y);
+                                stmt->setFloat(2, graveyardLocation->z);
+                                stmt->setFloat(3, instanceEntrance->target_Orientation);
+                                stmt->setUInt32(4, graveyardLocation->map_id);
+                                stmt->setUInt32(5, zoneId);
+                                stmt->setUInt32(6, member.guid);
+                                stmt->setUInt32(7, map->GetId());
+
+                                CharacterDatabase.Execute(stmt);
+                            }
+                        }
+                    }
+                }
+
                 instanceSave->DeleteFromDB();
+            }
             else
             {
                 PreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_DEL_GROUP_INSTANCE_BY_INSTANCE);