Syncing campaign state & save files with clients (WIP)

Barotrauma/BarotraumaClient/Source/GUI/GUI.cs

@@ -497,17 +497,22 @@ namespace Barotrauma
             {
                 GameMain.Config.SettingsFrame.Draw(spriteBatch);
             }
-            
+
             DebugConsole.Draw(spriteBatch);
-            
+
             if (GUIComponent.MouseOn != null && !string.IsNullOrWhiteSpace(GUIComponent.MouseOn.ToolTip)) GUIComponent.MouseOn.DrawToolTip(spriteBatch);
-            
+
             if (!GUI.DisableHUD)
-                cursor.Draw(spriteBatch, PlayerInput.LatestMousePosition);            
+                cursor.Draw(spriteBatch, PlayerInput.LatestMousePosition);
         }
 
         public static void AddToGUIUpdateList()
         {
+            if (GUIMessageBox.VisibleBox != null)
+            {
+                GUIMessageBox.VisibleBox.AddToGUIUpdateList();
+            }
+
             if (pauseMenuOpen)
             {
                 pauseMenu.AddToGUIUpdateList();
@@ -517,11 +522,6 @@ namespace Barotrauma
             {
                 GameMain.Config.SettingsFrame.AddToGUIUpdateList();
             }
-
-            if (GUIMessageBox.VisibleBox != null)
-            {
-                GUIMessageBox.VisibleBox.AddToGUIUpdateList();
-            }            
         }
 
         public static void Update(float deltaTime)

Barotrauma/BarotraumaClient/Source/Map/Map/Map.cs

@@ -11,8 +11,6 @@ namespace Barotrauma
         private static Texture2D iceCraters;
         private static Texture2D iceCrack;
 
-        public Action<Location, LocationConnection> OnLocationSelected;
-
         public void Update(float deltaTime, Rectangle rect, float scale = 1.0f)
         {
             Vector2 rectCenter = new Vector2(rect.Center.X, rect.Center.Y);

Barotrauma/BarotraumaClient/Source/Networking/FileTransfer/FileReceiver.cs

@@ -142,14 +142,18 @@ namespace Barotrauma.Networking
 
         private List<FileTransferIn> activeTransfers;
 
-        private string downloadFolder;
+        private Dictionary<FileTransferType, string> downloadFolders = new Dictionary<FileTransferType, string>()
+        {
+            { FileTransferType.Submarine, "Submarines/Downloaded" },
+            { FileTransferType.CampaignSave, "Data/Saves/Multiplayer" }
+        };
 
         public List<FileTransferIn> ActiveTransfers
         {
             get { return activeTransfers; }
         }
 
-        public FileReceiver(string downloadFolder)
+        public FileReceiver()
         {
             if (GameMain.Server != null)
             {
@@ -157,8 +161,6 @@ namespace Barotrauma.Networking
             }
 
             activeTransfers = new List<FileTransferIn>();
-
-            this.downloadFolder = downloadFolder;
         }
         
         public void ReadMessage(NetIncomingMessage inc)
@@ -201,11 +203,13 @@ namespace Barotrauma.Networking
                     if (GameSettings.VerboseLogging)
                     {
                         DebugConsole.Log("Received file transfer initiation message: ");
-                        DebugConsole.Log("  File: "+fileName);
+                        DebugConsole.Log("  File: " + fileName);
                         DebugConsole.Log("  Size: " + fileSize);
                         DebugConsole.Log("  Sequence channel: " + inc.SequenceChannel);
                     }
 
+                    string downloadFolder = downloadFolders[(FileTransferType)fileType];
+
                     if (!Directory.Exists(downloadFolder))
                     {
                         try
@@ -214,7 +218,7 @@ namespace Barotrauma.Networking
                         }
                         catch (Exception e)
                         {
-                            DebugConsole.ThrowError("Could not start a file transfer: failed to create the folder \""+downloadFolder+"\".", e);
+                            DebugConsole.ThrowError("Could not start a file transfer: failed to create the folder \"" + downloadFolder + "\".", e);
                             return;
                         }
                     }
@@ -322,6 +326,13 @@ namespace Barotrauma.Networking
                         return false;
                     }
                     break;
+                case (byte)FileTransferType.CampaignSave:
+                    if (Path.GetExtension(fileName) != ".save")
+                    {
+                        errorMessage = "Wrong file extension ''" + Path.GetExtension(fileName) + "''! (Expected .save)";
+                        return false;
+                    }
+                    break;
             }
 
             return true;
@@ -376,6 +387,9 @@ namespace Barotrauma.Networking
                     stream.Close();
                     stream.Dispose();
                     break;
+                case FileTransferType.CampaignSave:
+                    //TODO: verify that the received file is a valid save file
+                    break;
             }
 
             return true;

Barotrauma/BarotraumaClient/Source/Networking/GameClient.cs

@@ -89,7 +89,7 @@ namespace Barotrauma.Networking
 
             entityEventManager = new ClientEntityEventManager(this);
 
-            fileReceiver = new FileReceiver("Submarines/Downloaded");
+            fileReceiver = new FileReceiver();
             fileReceiver.OnFinished += OnFileReceived;
             
             characterInfo = new CharacterInfo(Character.HumanConfigFile, name,Gender.None,null);
@@ -703,8 +703,11 @@ namespace Barotrauma.Networking
 
             Rand.SetSyncedSeed(seed);
 
-            GameMain.GameSession = new GameSession(GameMain.NetLobbyScreen.SelectedSub, "", gameMode, Mission.MissionTypes[missionTypeIndex]);
+            if (gameMode.Name != "Campaign")
-            GameMain.GameSession.StartRound(levelSeed,loadSecondSub);
+            {
+                GameMain.GameSession = new GameSession(GameMain.NetLobbyScreen.SelectedSub, "", gameMode, Mission.MissionTypes[missionTypeIndex]);
+            }
+            GameMain.GameSession.StartRound(levelSeed, loadSecondSub);
 
             if (respawnAllowed) respawnManager = new RespawnManager(this, GameMain.NetLobbyScreen.SelectedShuttle);
             
@@ -896,7 +899,16 @@ namespace Barotrauma.Networking
                                 Voting.AllowModeVoting = allowModeVoting;
                             }
                         }
+
+                        bool campaignUpdated = inc.ReadBoolean();
+                        inc.ReadPadBits();
+                        if (campaignUpdated)
+                        {
+                            MultiplayerCampaign.ClientRead(inc);
+                        }
+
                         lastSentChatMsgID = inc.ReadUInt16();
+
                         break;
                     case ServerNetObject.CHAT_MESSAGE:
                         ChatMessage.ClientRead(inc);
@@ -961,6 +973,9 @@ namespace Barotrauma.Networking
             outmsg.Write(GameMain.NetLobbyScreen.LastUpdateID);
             outmsg.Write(ChatMessage.LastID);
 
+            var campaign = GameMain.GameSession?.GameMode as MultiplayerCampaign;
+            outmsg.Write(campaign == null ? 0 : campaign.LastUpdateID);
+
             chatMsgQueue.RemoveAll(cMsg => !NetIdUtils.IdMoreRecent(cMsg.NetStateID, lastSentChatMsgID));
             for (int i = 0; i < chatMsgQueue.Count && i < ChatMessage.MaxMessagesPerPacket; i++)
             {
@@ -1038,8 +1053,8 @@ namespace Barotrauma.Networking
             msg.Write((byte)ClientPacketHeader.FILE_REQUEST);
             msg.Write((byte)FileTransferMessageType.Initiate);
             msg.Write((byte)fileType);
-            msg.Write(file);
+            if (file != null) msg.Write(file);
-            msg.Write(fileHash);
+            if (fileHash != null) msg.Write(fileHash);
             client.SendMessage(msg, NetDeliveryMethod.ReliableUnordered);
         }
 
@@ -1083,6 +1098,22 @@ namespace Barotrauma.Networking
                         textBlock.UserData = newSub;
                         textBlock.ToolTip = newSub.Description;
                     }
+                    break;
+                case FileTransferType.CampaignSave:
+                    var campaign = GameMain.GameSession?.GameMode as MultiplayerCampaign;
+                    if (campaign == null) return;
+
+                    GameMain.GameSession.SavePath = transfer.FilePath;
+                    campaign.LastSaveID = campaign.PendingSaveID;
+
+                    if (GameMain.GameSession.Submarine == null)
+                    {
+                        var gameSessionDoc = SaveUtil.LoadGameSessionDoc(GameMain.GameSession.SavePath);
+                        string subPath = Path.Combine(SaveUtil.TempPath, ToolBox.GetAttributeString(gameSessionDoc.Root, "submarine", "")) + ".sub";
+
+                        GameMain.GameSession.Submarine = new Submarine(subPath, "");
+                    }
+
                     break;
             }
         }

Barotrauma/BarotraumaClient/Source/Screens/CampaignSetupUI.cs

@@ -1,10 +1,7 @@
 using Microsoft.Xna.Framework;
 using System;
-using System.Collections.Generic;
 using System.IO;
 using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Xml.Linq;
 
 namespace Barotrauma
@@ -18,6 +15,8 @@ namespace Barotrauma
 
         private GUITextBox saveNameBox, seedBox;
 
+        private GUIButton loadGameButton;
+        
         public Action<Submarine, string, string> StartNewGame;
         public Action<string> LoadGame;
 
@@ -138,8 +137,14 @@ namespace Barotrauma
                 textBlock.UserData = saveFile;
             }
 
-            var button = new GUIButton(new Rectangle(0, 0, 100, 30), "Start", Alignment.Right | Alignment.Bottom, "", loadGameContainer);
+            loadGameButton = new GUIButton(new Rectangle(0, 0, 100, 30), "Start", Alignment.Right | Alignment.Bottom, "", loadGameContainer);
-            button.OnClicked = (btn, obj) => { LoadGame?.Invoke(saveList.SelectedData as string); return true; };
+            loadGameButton.OnClicked = (btn, obj) => 
+            {
+                if (string.IsNullOrWhiteSpace(saveList.SelectedData as string)) return false;
+                LoadGame?.Invoke(saveList.SelectedData as string);
+                return true;
+            };
+            loadGameButton.Enabled = false;
         }
 
         private bool SelectSaveFile(GUIComponent component, object obj)
@@ -154,6 +159,8 @@ namespace Barotrauma
                 return false;
             }
 
+            loadGameButton.Enabled = true;
+
             RemoveSaveFrame();
 
             string subName = ToolBox.GetAttributeString(doc.Root, "submarine", "");

Barotrauma/BarotraumaClient/Source/Screens/NetLobbyScreen.cs

@@ -1001,7 +1001,7 @@ namespace Barotrauma
 
             if (campaignContainer.Visible && campaignUI != null)
             {
-                campaignContainer.Update((float)deltaTime);
+                //campaignContainer.Update((float)deltaTime);
                 campaignUI.Update((float)deltaTime);
             }
 
@@ -1096,9 +1096,18 @@ namespace Barotrauma
 
         public void SelectMode(int modeIndex)
         {
-            modeList.Select(modeIndex, true);
+            if (modeIndex < 0 || modeIndex >= modeList.children.Count) return;
 
-            ToggleCampaignMode(SelectedMode.Name == "Campaign");
+            if (GameMain.Server != null)
+            {
+                if (((GameModePreset)modeList.children[modeIndex].UserData).Name == "Campaign")
+                {
+                    MultiplayerCampaign.StartCampaignSetup();
+                    return;
+                }
+            }
+
+            modeList.Select(modeIndex, true);            
             missionTypeBlock.Visible = SelectedMode != null && SelectedMode.Name == "Mission";
         }
 
@@ -1110,35 +1119,49 @@ namespace Barotrauma
             if (modePreset == null) return false;
             
             missionTypeBlock.Visible = modePreset.Name == "Mission";
-            
+                        
-            if (modePreset.Name == "Campaign")
+            if (GameMain.Server != null)
             {
-                MultiplayerCampaign.StartCampaignSetup();
+                //campaign selected and the campaign view has not been set up yet
-            }
+                // -> don't select the mode yet and start campaign setup
-
+                if (modePreset.Name == "Campaign" && !campaignContainer.Visible)
+                {
+                    MultiplayerCampaign.StartCampaignSetup();
+                    return false;
+                }
+            }            
+            
             lastUpdateID++;
             return true;
         }
 
         public void ToggleCampaignView(bool enabled)
         {
-            defaultModeContainer.Visible = !enabled;
-            StartButton.Visible = !enabled;
-
             campaignContainer.Visible = enabled;
+            defaultModeContainer.Visible = !enabled;
+            if (StartButton != null)
+            {
+                StartButton.Visible = !enabled;
+            }
         }
 
         public void ToggleCampaignMode(bool enabled)
         {
-            StartButton.Visible = !enabled;
-            campaignViewButton.Visible = enabled;
-
             ToggleCampaignView(enabled);
 
-            if (enabled && campaignUI == null)
+            if (enabled)
             {
-                campaignUI = new CampaignUI(GameMain.GameSession.GameMode as CampaignMode, campaignContainer);
+                if (campaignUI == null)
-                campaignUI.StartRound = () => { GameMain.Server.StartGame(); };
+                {
+                    campaignUI = new CampaignUI(GameMain.GameSession.GameMode as CampaignMode, campaignContainer);
+                    campaignUI.StartRound = () => { GameMain.Server.StartGame(); };
+                }
+                modeList.Select(2, true);
+            }
+
+            if (GameMain.Server != null)
+            {
+                lastUpdateID++;
             }
         }
 

Barotrauma/BarotraumaShared/Source/GameSession/GameModes/MultiplayerCampaign.cs

@@ -1,14 +1,34 @@
-using Microsoft.Xna.Framework;
+using Barotrauma.Networking;
+using Microsoft.Xna.Framework;
 using System;
-using System.Collections.Generic;
 using System.Linq;
-using System.Text;
 using System.Xml.Linq;
+using Lidgren.Network;
+using System.Collections.Generic;
 
 namespace Barotrauma
 {
     class MultiplayerCampaign : CampaignMode
     {
+        private UInt16 lastUpdateID;
+        public UInt16 LastUpdateID
+        {
+            get { if (GameMain.Server != null && lastUpdateID < 1) lastUpdateID++; return lastUpdateID; }
+            set { lastUpdateID = value; }
+        }
+
+        private UInt16 lastSaveID;
+        public UInt16 LastSaveID
+        {
+            get { if (GameMain.Server != null && lastSaveID < 1) lastSaveID++; return lastSaveID; }
+            set { lastSaveID = value; }
+        }
+        
+        public UInt16 PendingSaveID
+        {
+            get;
+            set;
+        }
 
         public MultiplayerCampaign(GameModePreset preset, object param) : 
             base(preset, param)
@@ -49,88 +69,123 @@ namespace Barotrauma
                 GameMain.GameSession = new GameSession(sub, saveName, GameModePreset.list.Find(g => g.Name == "Campaign"));
                 var campaign = ((MultiplayerCampaign)GameMain.GameSession.GameMode);
                 campaign.GenerateMap(mapSeed);
+                campaign.map.OnLocationSelected += (loc, connection) => { campaign.LastUpdateID++; };
+
                 setupBox.Close();
 
                 GameMain.NetLobbyScreen.ToggleCampaignMode(true);
+                
+                SaveUtil.SaveGame(GameMain.GameSession.SavePath);
+                campaign.LastSaveID++;                
             };
 
             campaignSetupUI.LoadGame = (string fileName) =>
             {
                 SaveUtil.LoadGame(fileName);
+                var campaign = ((MultiplayerCampaign)GameMain.GameSession.GameMode);
+                campaign.LastSaveID++;
+
                 setupBox.Close();
 
                 GameMain.NetLobbyScreen.ToggleCampaignMode(true);
             };
+
+            var cancelButton = new GUIButton(new Rectangle(0,0,120,30), "Cancel", Alignment.BottomLeft, "", setupBox.InnerFrame);
+            cancelButton.OnClicked += (btn, obj) =>
+            {
+                setupBox.Close();
+                int otherModeIndex = 0;
+                for (otherModeIndex = 0; otherModeIndex < GameMain.NetLobbyScreen.ModeList.children.Count; otherModeIndex++)
+                {
+                    if (GameMain.NetLobbyScreen.ModeList.children[otherModeIndex].UserData is MultiplayerCampaign) continue;
+                    break;
+                }
+
+                GameMain.NetLobbyScreen.SelectMode(otherModeIndex);
+                return true;
+            };
         }
 
 #endif
 
+        public override void Start()
+        {
+            base.Start();
+            
+            lastUpdateID++;
+        }
+
 
         public override void End(string endMessage = "")
         {
             isRunning = false;
 
-            bool success = 
+            if (GameMain.Server != null)
-                GameMain.Server.ConnectedClients.Any(c => c.inGame && c.Character != null && !c.Character.IsDead) ||
-                (GameMain.Server.Character != null && !GameMain.Server.Character.IsDead);
-
-            /*if (success)
             {
-                if (subsToLeaveBehind == null || leavingSub == null)
+                lastUpdateID++;
+
+                bool success = 
+                    GameMain.Server.ConnectedClients.Any(c => c.inGame && c.Character != null && !c.Character.IsDead) ||
+                    (GameMain.Server.Character != null && !GameMain.Server.Character.IsDead);
+
+                /*if (success)
                 {
-                    DebugConsole.ThrowError("Leaving submarine not selected -> selecting the closest one");
+                    if (subsToLeaveBehind == null || leavingSub == null)
-
-                    leavingSub = GetLeavingSub();
-
-                    subsToLeaveBehind = GetSubsToLeaveBehind(leavingSub);
-                }
-            }*/
-
-            GameMain.GameSession.EndRound("");
-
-            if (success)
-            {
-                bool atEndPosition = Submarine.MainSub.AtEndPosition;
-
-                /*if (leavingSub != Submarine.MainSub && !leavingSub.DockedTo.Contains(Submarine.MainSub))
-                {
-                    Submarine.MainSub = leavingSub;
-
-                    GameMain.GameSession.Submarine = leavingSub;
-
-                    foreach (Submarine sub in subsToLeaveBehind)
                     {
-                        MapEntity.mapEntityList.RemoveAll(e => e.Submarine == sub && e is LinkedSubmarine);
+                        DebugConsole.ThrowError("Leaving submarine not selected -> selecting the closest one");
-                        LinkedSubmarine.CreateDummy(leavingSub, sub);
+
+                        leavingSub = GetLeavingSub();
+
+                        subsToLeaveBehind = GetSubsToLeaveBehind(leavingSub);
                     }
                 }*/
 
-                if (atEndPosition)
+                GameMain.GameSession.EndRound("");
+
+                if (success)
                 {
-                    Map.MoveToNextLocation();
+                    bool atEndPosition = Submarine.MainSub.AtEndPosition;
+
+                    /*if (leavingSub != Submarine.MainSub && !leavingSub.DockedTo.Contains(Submarine.MainSub))
+                    {
+                        Submarine.MainSub = leavingSub;
+
+                        GameMain.GameSession.Submarine = leavingSub;
+
+                        foreach (Submarine sub in subsToLeaveBehind)
+                        {
+                            MapEntity.mapEntityList.RemoveAll(e => e.Submarine == sub && e is LinkedSubmarine);
+                            LinkedSubmarine.CreateDummy(leavingSub, sub);
+                        }
+                    }*/
+
+                    if (atEndPosition)
+                    {
+                        Map.MoveToNextLocation();
+                    }
+
+                    SaveUtil.SaveGame(GameMain.GameSession.SavePath);
                 }
 
-                SaveUtil.SaveGame(GameMain.GameSession.SavePath);
-            }
 
-
+                if (!success)
-            if (!success)
-            {
-               /* var summaryScreen = GUIMessageBox.VisibleBox;
-
-                if (summaryScreen != null)
                 {
-                    summaryScreen = summaryScreen.children[0];
+                   /* var summaryScreen = GUIMessageBox.VisibleBox;
-                    summaryScreen.RemoveChild(summaryScreen.children.Find(c => c is GUIButton));
 
-                    var okButton = new GUIButton(new Rectangle(-120, 0, 100, 30), "Load game", Alignment.BottomRight, "", summaryScreen);
+                    if (summaryScreen != null)
-                    okButton.OnClicked += GameMain.GameSession.LoadPrevious;
+                    {
-                    okButton.OnClicked += (GUIButton button, object obj) => { GUIMessageBox.MessageBoxes.Remove(GUIMessageBox.VisibleBox); return true; };
+                        summaryScreen = summaryScreen.children[0];
+                        summaryScreen.RemoveChild(summaryScreen.children.Find(c => c is GUIButton));
 
-                    var quitButton = new GUIButton(new Rectangle(0, 0, 100, 30), "Quit", Alignment.BottomRight, "", summaryScreen);
+                        var okButton = new GUIButton(new Rectangle(-120, 0, 100, 30), "Load game", Alignment.BottomRight, "", summaryScreen);
-                    quitButton.OnClicked += GameMain.LobbyScreen.QuitToMainMenu;
+                        okButton.OnClicked += GameMain.GameSession.LoadPrevious;
-                    quitButton.OnClicked += (GUIButton button, object obj) => { GUIMessageBox.MessageBoxes.Remove(GUIMessageBox.VisibleBox); return true; };
+                        okButton.OnClicked += (GUIButton button, object obj) => { GUIMessageBox.MessageBoxes.Remove(GUIMessageBox.VisibleBox); return true; };
-                }*/
+
+                        var quitButton = new GUIButton(new Rectangle(0, 0, 100, 30), "Quit", Alignment.BottomRight, "", summaryScreen);
+                        quitButton.OnClicked += GameMain.LobbyScreen.QuitToMainMenu;
+                        quitButton.OnClicked += (GUIButton button, object obj) => { GUIMessageBox.MessageBoxes.Remove(GUIMessageBox.VisibleBox); return true; };
+                    }*/
+                }
             }
             
             for (int i = Character.CharacterList.Count - 1; i >= 0; i--)
@@ -165,6 +220,8 @@ namespace Barotrauma
                 campaign.map.SetLocation(ToolBox.GetAttributeInt(element, "currentlocation", 0));
             }
 
+            campaign.map.OnLocationSelected += (loc, connection) => { campaign.LastUpdateID++; };
+
             //campaign.savedOnStart = true;
             return campaign;
         }
@@ -175,6 +232,73 @@ namespace Barotrauma
             modeElement.Add(new XAttribute("money", Money));            
             Map.Save(modeElement);
             element.Add(modeElement);
+
+            lastSaveID++;
         }
+
+        public void ServerWrite(NetBuffer msg, Client c)
+        {
+            System.Diagnostics.Debug.Assert(map.Locations.Count < UInt16.MaxValue);
+
+            msg.Write(lastUpdateID);
+            msg.Write(lastSaveID);
+            msg.Write(map.Seed);
+            msg.Write(map.CurrentLocationIndex == -1 ? UInt16.MaxValue : (UInt16)map.CurrentLocationIndex);
+            msg.Write(map.SelectedLocationIndex == -1 ? UInt16.MaxValue : (UInt16)map.SelectedLocationIndex);
+
+        }
+
+#if CLIENT
+        public static void ClientRead(NetBuffer msg)
+        {
+            //static because we may need to instantiate the campaign if it hasn't been done yet
+
+            UInt16 updateID         = msg.ReadUInt16();
+            UInt16 saveID           = msg.ReadUInt16();
+            string mapSeed          = msg.ReadString();
+            UInt16 currentLocIndex  = msg.ReadUInt16();
+            UInt16 selectedLocIndex = msg.ReadUInt16();
+
+            MultiplayerCampaign campaign = GameMain.GameSession?.GameMode as MultiplayerCampaign;
+            if (campaign == null)
+            {
+                string savePath = SaveUtil.CreateSavePath(SaveUtil.SaveType.Multiplayer);
+                
+                GameMain.GameSession = new GameSession(
+                    null, //TODO: set the sub (after receiving the save file?)
+                    savePath, GameModePreset.list.Find(g => g.Name == "Campaign"));
+
+                campaign = ((MultiplayerCampaign)GameMain.GameSession.GameMode);
+                campaign.GenerateMap(mapSeed);
+
+                GameMain.NetLobbyScreen.ToggleCampaignMode(true);
+            }
+            if (NetIdUtils.IdMoreRecent(campaign.lastUpdateID, updateID)) return;
+
+            //server has a newer save file
+            if (NetIdUtils.IdMoreRecent(saveID, campaign.PendingSaveID))
+            {
+                //stop any active campaign save transfers, they're outdated now
+                List<FileReceiver.FileTransferIn> saveTransfers = 
+                    GameMain.Client.FileReceiver.ActiveTransfers.FindAll(t => t.FileType == FileTransferType.CampaignSave);
+
+                foreach (var transfer in saveTransfers)
+                {
+                    GameMain.Client.FileReceiver.StopTransfer(transfer);                    
+                }
+
+                GameMain.Client.RequestFile(FileTransferType.CampaignSave, null, null);
+                campaign.PendingSaveID = saveID;
+            }
+            //we've got the latest save file
+            else if (!NetIdUtils.IdMoreRecent(saveID, campaign.lastSaveID))
+            {
+                campaign.Map.SetLocation(currentLocIndex == UInt16.MaxValue ? -1 : currentLocIndex);
+                campaign.Map.SelectLocation(selectedLocIndex == UInt16.MaxValue ? -1 : selectedLocIndex);
+                campaign.lastUpdateID = updateID;
+            }
+        }
+
+#endif
     }
 }

Barotrauma/BarotraumaShared/Source/GameSession/GameSession.cs

@@ -79,6 +79,7 @@ namespace Barotrauma
         public string SavePath
         {
             get { return savePath; }
+            set { savePath = value; }
         }
 
         public GameSession(Submarine submarine, string savePath, GameModePreset gameModePreset = null, string missionType = "")
@@ -168,7 +169,7 @@ namespace Barotrauma
                         
             this.level = level;
 
-            if (submarine==null)
+            if (submarine == null)
             {
                 DebugConsole.ThrowError("Couldn't start game session, submarine not selected");
                 return;

Barotrauma/BarotraumaShared/Source/Map/Map/Map.cs

@@ -28,6 +28,8 @@ namespace Barotrauma
 
         private LocationConnection selectedConnection;
 
+        public Action<Location, LocationConnection> OnLocationSelected;
+
         public Location CurrentLocation
         {
             get { return currentLocation; }
@@ -43,6 +45,11 @@ namespace Barotrauma
             get { return selectedLocation; }
         }
 
+        public int SelectedLocationIndex
+        {
+            get { return locations.IndexOf(selectedLocation); }
+        }
+
         public LocationConnection SelectedConnection
         {
             get { return selectedConnection; }
@@ -53,6 +60,11 @@ namespace Barotrauma
             get { return seed; }
         }
 
+        public List<Location> Locations
+        {
+            get { return locations; }
+        }
+
         public static Map Load(XElement element)
         {
             string mapSeed = ToolBox.GetAttributeString(element, "seed", "a");
@@ -342,6 +354,12 @@ namespace Barotrauma
 
         public void SetLocation(int index)
         {
+            if (index == -1)
+            {
+                currentLocation = null;
+                return;
+            }
+
             if (index < 0 || index >= locations.Count)
             {
                 DebugConsole.ThrowError("Location index out of bounds");
@@ -352,6 +370,28 @@ namespace Barotrauma
             currentLocation.Discovered = true;
         }
 
+        public void SelectLocation(int index)
+        {
+            if (index == -1)
+            {
+                selectedLocation = null;
+                selectedConnection = null;
+
+                OnLocationSelected?.Invoke(null, null);
+                return;
+            }
+
+            if (index < 0 || index >= locations.Count)
+            {
+                DebugConsole.ThrowError("Location index out of bounds");
+                return;
+            }
+
+            selectedLocation = locations[index];
+            selectedConnection = connections.Find(c => c.Locations.Contains(currentLocation) && c.Locations.Contains(selectedLocation));
+            OnLocationSelected?.Invoke(selectedLocation, selectedConnection);
+        }
+
         public void Save(XElement element)
         {
             XElement mapElement = new XElement("map");

Barotrauma/BarotraumaShared/Source/Networking/Client.cs

@@ -36,7 +36,9 @@ namespace Barotrauma.Networking
 
         public UInt16 lastSentEntityEventID = 0;
         public UInt16 lastRecvEntityEventID = 0;
-        
+
+        public UInt16 lastRecvCampaignUpdate = 0;
+
         public List<ChatMessage> chatMsgQueue = new List<ChatMessage>();
         public UInt16 lastChatMsgQueueID;
 

Barotrauma/BarotraumaShared/Source/Networking/FileTransfer/FileSender.cs

@@ -18,7 +18,7 @@ namespace Barotrauma.Networking
 
     enum FileTransferType
     {
-        Submarine
+        Submarine, CampaignSave
     }
 
     class FileSender
@@ -277,6 +277,12 @@ namespace Barotrauma.Networking
                         StartTransfer(inc.SenderConnection, FileTransferType.Submarine, requestedSubmarine.FilePath);
                     }
                     break;
+                case (byte)FileTransferType.CampaignSave:
+                    if (GameMain.GameSession != null)
+                    {
+                        StartTransfer(inc.SenderConnection, FileTransferType.CampaignSave, GameMain.GameSession.SavePath);
+                    }
+                    break;
             }
         }
 

Barotrauma/BarotraumaShared/Source/Networking/GameServer.cs

@@ -611,6 +611,8 @@ namespace Barotrauma.Networking
                         //TODO: might want to use a clever class for this
                         c.lastRecvGeneralUpdate = NetIdUtils.Clamp(inc.ReadUInt16(), c.lastRecvGeneralUpdate, GameMain.NetLobbyScreen.LastUpdateID);
                         c.lastRecvChatMsgID     = NetIdUtils.Clamp(inc.ReadUInt16(), c.lastRecvChatMsgID, c.lastChatMsgQueueID);
+
+                        c.lastRecvCampaignUpdate    = inc.ReadUInt16();
                         break;
                     case ClientNetObject.CHAT_MESSAGE:
                         ChatMessage.ServerRead(inc, c);
@@ -964,6 +966,27 @@ namespace Barotrauma.Networking
                 outmsg.Write(false);
                 outmsg.WritePadBits();
             }
+
+            var campaign = GameMain.GameSession?.GameMode as MultiplayerCampaign;
+            if (campaign != null)
+            {
+                if (NetIdUtils.IdMoreRecent(campaign.LastUpdateID, c.lastRecvCampaignUpdate))
+                {
+                    outmsg.Write(true);
+                    outmsg.WritePadBits();
+                    campaign.ServerWrite(outmsg, c);
+                }
+                else
+                {
+                    outmsg.Write(false);
+                    outmsg.WritePadBits();
+                }
+            }
+            else
+            {
+                outmsg.Write(false);
+                outmsg.WritePadBits();
+            }
             
             outmsg.Write(c.lastSentChatMsgID); //send this to client so they know which chat messages weren't received by the server
             
@@ -1128,9 +1151,7 @@ namespace Barotrauma.Networking
             
             int teamCount = 1;
             byte hostTeam = 1;
-
+            
-            string levelSeed = GameMain.NetLobbyScreen.LevelSeed;
-
             MultiplayerCampaign campaign = GameMain.GameSession?.GameMode as MultiplayerCampaign;
         
             //don't instantiate a new gamesession if we're playing a campaign
@@ -1310,7 +1331,7 @@ namespace Barotrauma.Networking
 
             msg.Write(seed);
 
-            msg.Write(GameMain.NetLobbyScreen.LevelSeed);
+            msg.Write(GameMain.GameSession.Level.Seed);
 
             msg.Write((byte)GameMain.NetLobbyScreen.MissionTypeIndex);
 

Barotrauma/BarotraumaShared/Source/Utils/SaveUtil.cs

@@ -40,10 +40,19 @@ namespace Barotrauma
 
             try
             {
-                if (Submarine.MainSub != null && Submarine.Loaded.Contains(Submarine.MainSub))
+                string subPath = Path.Combine(tempPath, Submarine.MainSub.Name + ".sub");
+                if (Submarine.MainSub != null)
                 {
-                    Submarine.MainSub.FilePath = Path.Combine(tempPath, Submarine.MainSub.Name + ".sub");
+                    if (Submarine.Loaded.Contains(Submarine.MainSub))
-                    Submarine.MainSub.SaveAs(Submarine.MainSub.FilePath);
+                    {
+                        Submarine.MainSub.FilePath = subPath;
+                        Submarine.MainSub.SaveAs(Submarine.MainSub.FilePath);
+                    }
+                    else
+                    {
+                        File.Copy(Submarine.MainSub.FilePath, subPath);
+                        Submarine.MainSub.FilePath = subPath;
+                    }
                 }
             }
             catch (Exception e)
@@ -79,8 +88,8 @@ namespace Barotrauma
             XDocument doc = ToolBox.TryLoadXml(Path.Combine(TempPath, "gamesession.xml"));
 
             string subPath = Path.Combine(TempPath, ToolBox.GetAttributeString(doc.Root, "submarine", "")) + ".sub";
-            Submarine selectedMap = new Submarine(subPath, "");
+            Submarine selectedSub = new Submarine(subPath, "");
-            GameMain.GameSession = new GameSession(selectedMap, filePath, doc);
+            GameMain.GameSession = new GameSession(selectedSub, filePath, doc);
         }
 
         public static XDocument LoadGameSessionDoc(string filePath)