From be59b9526871964a8432d41ea901ad4719de5953 Mon Sep 17 00:00:00 2001
From: UnknownShadow200 <unknownshadow200@gmail.com>
Date: Thu, 9 Jun 2016 22:14:05 +1000
Subject: [PATCH] Keep all .lvl.prev files in a separate levels/prev directory.

---
 Levels/Level.cs        | 17 ++++++++---------
 Levels/LevelInfo.cs    |  4 ++++
 Server/Server.Tasks.cs | 24 ++++++++++++++++++++++++
 Server/Server.cs       |  1 +
 4 files changed, 37 insertions(+), 9 deletions(-)

diff --git a/Levels/Level.cs b/Levels/Level.cs
index 1502200e2..eab2d36a3 100644
--- a/Levels/Level.cs
+++ b/Levels/Level.cs
@@ -541,16 +541,17 @@ public void Save(bool Override = false, bool clearPhysics = false)
             {
                 if (!Directory.Exists("levels")) Directory.CreateDirectory("levels");
                 if (!Directory.Exists("levels/level properties")) Directory.CreateDirectory("levels/level properties");
-
-                if (changed || !File.Exists(path) || Override || (physicschanged && clearPhysics))
-                {
+                if (!Directory.Exists("levels/prev")) Directory.CreateDirectory("levels/prev");
+                
+                if (changed || !File.Exists(path) || Override || (physicschanged && clearPhysics)) {
                     if (clearPhysics)
                         ClearPhysics();
                     
                     if (File.Exists(path)) {
-                        if (File.Exists(path + ".prev"))
-                            File.Delete(path + ".prev");
-                        File.Copy(path, path + ".prev");
+                    	string prevPath = LevelInfo.PrevPath(name);
+                    	if (File.Exists(prevPath))
+                            File.Delete(prevPath);
+                        File.Copy(path, prevPath, true);
                         File.Delete(path);
                     }
                     LvlFile.Save(this, path + ".backup");
@@ -560,9 +561,7 @@ public void Save(bool Override = false, bool clearPhysics = false)
                     Server.s.Log(string.Format("SAVED: Level \"{0}\". ({1}/{2}/{3})", name, players.Count,
                                                PlayerInfo.Online.Count, Server.players));
                     changed = false;
-                }
-                else
-                {
+                } else {
                     Server.s.Log("Skipping level save for " + name + ".");
                 }
             } catch (Exception e) {
diff --git a/Levels/LevelInfo.cs b/Levels/LevelInfo.cs
index 97514f494..2dd9ecfd0 100644
--- a/Levels/LevelInfo.cs
+++ b/Levels/LevelInfo.cs
@@ -88,6 +88,10 @@ public static string LevelPath(string name) {
             return "levels/" + name.ToLower() + ".lvl";
         }
         
+        public static string PrevPath(string name) {
+            return "levels/prev/" + name.ToLower() + ".lvl.prev";
+        }
+        
         public static string BackupPath(string name, string backup) {
             return Server.backupLocation + "/" + name + "/" + backup + "/" + name + ".lvl";
         }
diff --git a/Server/Server.Tasks.cs b/Server/Server.Tasks.cs
index 85952278f..9a2888c71 100644
--- a/Server/Server.Tasks.cs
+++ b/Server/Server.Tasks.cs
@@ -112,6 +112,30 @@ static void AutoLoadLineProcessor(string key, string value) {
                 }
             }
         }
+		
+        void MovePreviousLevelFiles() {
+            if (!Directory.Exists("levels")) return;
+            try {
+                string[] files = Directory.GetFiles("levels", "*.prev");
+                if (files.Length == 0) return;
+                if (!Directory.Exists("levels/prev"))
+                    Directory.CreateDirectory("levels/prev");
+                
+                foreach (string file in files) {
+                    string name = Path.GetFileName(file);
+                    string newFile = "levels/prev/" + name;
+                    
+                    try {
+                        File.Move(file, newFile);
+                    } catch (Exception ex) {
+                        Server.s.Log("Error while trying to move .lvl.prev file");
+                        Server.ErrorLog(ex);
+                    }
+                }
+            } catch (Exception ex) {
+                Server.ErrorLog(ex);
+            }
+        }
         
         void SetupSocket() {
             Log("Creating listening socket on port " + port + "... ");
diff --git a/Server/Server.cs b/Server/Server.cs
index 903b5b5b9..f9015a8f3 100644
--- a/Server/Server.cs
+++ b/Server/Server.cs
@@ -479,6 +479,7 @@ public void Start() {
             Plugin.Load();
             ml.Queue(LoadPlayerLists);
             ml.Queue(LoadAutoloadCommands);
+            ml.Queue(MovePreviousLevelFiles);
             ml.Queue(SetupSocket);
 
             ml.Queue(InitTimers);