Use detected Steam locations, update launch options

GCMM/MainForm.cs

@@ -26,6 +26,7 @@ namespace GCMM
         private readonly ModInfo gcipa = new ModInfo { Author = "modtainers", Name = "GCIPA" };
         private readonly ModInfo gcmm = new ModInfo { Author = "NorbiPeti", Name = "GCMM" };
         private DateTime lastGameUpdateTime;
+        private string steamPath;
         private const string defaultInfo = @"
 Gamecraft Mod Manager
 
@@ -64,7 +65,27 @@ You may also want to verify the game's files by right clicking the game in Steam
             mods.Clear(); //This method may get called twice when ran from the command line
             UpdateButton(installbtn, false);
             modinfobox.Text = defaultInfo;
-            GetSteamLocationAndUser(); //TODO: If user is null then start Steam
+            var (steamPath, user) = GetSteamLocationAndUser(); //TODO: If user is 0 then start Steam
+            if (steamPath != null)
+                this.steamPath = steamPath;
+            else
+            {
+                MessageBox.Show("Steam not found! If you have Steam installed, please report this to ExMods.\n\nThe Steam install is checked to autodetect where the game is installed and to optionally configure auto-patching.", "Steam not found");
+                status.Text = "Status: Steam not found";
+                return;
+            }
+            if (Settings.Default.SteamUserID == 0 && Settings.Default.AutoLaunch)
+            {
+                if (MessageBox.Show("Do you want GCMM to change the game's launch settings so it can ensure the game is patched?\n\n" +
+                    "If you say yes, GCMM will do a quick check before the game is launched and patches if necessary. " +
+                    "This way you (hopefully) won't see crashes after a Gamecraft update.\n\n" +
+                    "Note that this also means that if you (re)move GCMM without disabling this in the settings then you won't be able to launch Gamecraft.",
+                    "GCMM auto-patching", MessageBoxButtons.YesNo) == DialogResult.Yes)
+                    DetectConfigLocationAndAutoStart(steamPath, ref user);
+                else
+                    Settings.Default.AutoLaunch = false;
+                Settings.Default.Save();
+            }
             if (string.IsNullOrWhiteSpace(Settings.Default.GamePath) || GetExe() == null)
             {
                 Settings.Default.GamePath = GetGameFolder();
@@ -82,34 +103,6 @@ You may also want to verify the game's files by right clicking the game in Steam
             DeleteEmptyPluginsDir(out bool pexists, out bool dexists);
             if (!pexists && dexists)
                 unpatched.Checked = true; //It will call the event but that won't do anything
-            if(Settings.Default.AutoLaunch && string.IsNullOrWhiteSpace(Settings.Default.SteamConfigFileForAutoLaunch))
-            {
-                string path = @"C:\Program Files (x86)\Steam\userdata";
-                if(MessageBox.Show("Do you want GCMM to change the game's launch settings so it can ensure the game is patched?\n\n" +
-                    "If you say yes, GCMM will do a quick check before the game is launched and updates if necessary. " +
-                    "This way you (hopefully) won't see crashes after a Gamecraft update.\n\n" +
-                    "Note that this also means that if you (re)move GCMM without disabling this then you won't be able to launch Gamecraft.",
-                    "GCMM auto-patching", MessageBoxButtons.YesNo)==DialogResult.Yes)
-                {
-                    var dirs = Directory.GetDirectories(path);
-                    var goodPaths = (from dir in dirs
-                                     where File.Exists(dir + @"\config\localconfig.vdf")
-                                     select dir + @"\config\localconfig.vdf").ToArray();
-                    if (goodPaths.Length != 1)
-                        path = SelectSteamConfigFile();
-                    else
-                        path = goodPaths[0];
-                    //if (path is not null)
-                    if (path != null)
-                    {
-                        Settings.Default.SteamConfigFileForAutoLaunch = path;
-                        UpdateSteamConfigToAutoStart(true);
-                    }
-                    else
-                        Settings.Default.AutoLaunch = false;
-                    Settings.Default.Save();
-                }
-            }
             await RefreshEverything();
         }
 

GCMM/MainUtils.cs

@@ -36,7 +36,7 @@ namespace GCMM
         { //TODO
             string libs;
             if (Environment.OSVersion.Platform == PlatformID.Win32NT)
-                libs = Settings.Default.SteamConfigFileForAutoLaunch + @"\steamapps\libraryfolders.vdf"; //TODO: Not the Steam folder anymore!
+                libs = Settings.Default.SteamUserID + @"\steamapps\libraryfolders.vdf"; //TODO: Not the Steam folder anymore!
             else
                 return null;
             foreach (var line in File.ReadAllLines(libs).Concat(new[] {@"C:\Program Files (x86)\Steam\"}))
@@ -68,23 +68,48 @@ namespace GCMM
             return Directory.GetParent(ofd.FileName).FullName;
         }
 
-        public string SelectSteamConfigFile()
+        public (string, int) AskForSteamLogin()
         {
-            MessageBox.Show("Please select your Steam config location in the next dialog. It's at Steam\\userdata\\<YourID>\\config\\localconfig.vdf");
-            var ofd = new OpenFileDialog();
-            ofd.Filter = "Steam config|localconfig.vdf";
-            ofd.Title = "Steam config location (Steam\\userdata\\<YourID>\\config\\localconfig.vdf)";
-            ofd.InitialDirectory = @"C:\Program Files (x86)\Steam\\userdata\"; //TODO
-            ofd.CheckFileExists = true;
-            ofd.ShowDialog();
-            if (string.IsNullOrWhiteSpace(ofd.FileName))
-                return null;
-            return ofd.FileName;
+            while (MessageBox.Show("Couid not find your Steam configuration to set launch options.\n\n" +
+                "Please make sure you are logged into Steam and click Retry or click Cancel to skip setting this up.",
+                "Steam config not found", MessageBoxButtons.RetryCancel) != DialogResult.Cancel)
+            {
+                var ret = GetSteamLocationAndUser();
+                if (ret != (null, 0))
+                    return ret;
+            }
+            return (null, 0);
         }
 
-        private void UpdateSteamConfigToAutoStart(bool autoLaunch)
+        private bool UpdateOrGetSteamConfigToAutoStart(bool? autoLaunch)
         {
-            //TODO
+            var regex = new Regex(@"(\t{6}""LaunchOptions""\t+"")(.*)("")");
+            string path = steamPath + @"\userdata\" + Settings.Default.SteamUserID + @"\config\localconfig.vdf";
+            var lines = File.ReadAllLines(path);
+            bool shouldMatch = false;
+            bool ret = false;
+            for (int i = 0; i < lines.Length; i++)
+            {
+                if (lines[i] == "\t\t\t\t\t\"1078000\"")
+                    shouldMatch = true; //Found the game
+                else if(shouldMatch)
+                {
+                    var match = regex.Match(lines[i]);
+                    if (!match.Success)
+                        continue;
+                    if (autoLaunch.HasValue)
+                    {
+                        if (autoLaunch.Value)
+                            lines[i] = match.Groups[1].Value + Application.ExecutablePath + " -start %command%" + match.Groups[3].Value;
+                        else
+                            lines[i] = match.Groups[1].Value + match.Groups[2].Value;
+                        File.WriteAllLines(path, lines);
+                    }
+                    ret = match.Groups[2].Value.Contains("GCMM.exe");
+                    break;
+                }
+            }
+            return ret;
         }
 
         private (string, int) GetSteamLocationAndUser()
@@ -92,9 +117,42 @@ namespace GCMM
             if (Environment.OSVersion.Platform != PlatformID.Win32NT) return (null, 0);
             using (var key = Registry.CurrentUser.OpenSubKey(@"Software\Valve\Steam\ActiveProcess"))
             {
-                string path = Directory.GetParent((string)key.GetValue("SteamClientDll")).FullName;
-                return (path, (int)key.GetValue("ActiveUser"));
+                string path = (string)key?.GetValue("SteamClientDll");
+                path = path != null ? Directory.GetParent(path).FullName : null;
+                return (path, (int)(key.GetValue("ActiveUser") ?? 0));
+            }
+        }
+
+        private void DetectConfigLocationAndAutoStart(string steamPath, ref int user)
+        {
+            string path = steamPath + @"\userdata";
+            if (user == 0)
+            {
+                var dirs = Directory.GetDirectories(path);
+                var goodPaths = (from dir in dirs
+                                 where File.Exists(dir + @"\config\localconfig.vdf")
+                                 select dir).ToArray();
+                if (goodPaths.Length != 1)
+                {
+                    (_, user) = AskForSteamLogin();
+                    path += user;
+                }
+                else
+                {
+                    path = goodPaths[0];
+                    user = int.Parse(Path.GetFileName(path));
+                }
+            }
+            else
+                path += user;
+            path += @"\config\localconfig.vdf";
+            if (path != null && user != 0 && File.Exists(path))
+            {
+                Settings.Default.SteamUserID = user;
+                UpdateOrGetSteamConfigToAutoStart(true);
             }
+            else
+                Settings.Default.AutoLaunch = false;
         }
 
         private void CheckStartGame(object sender, EventArgs e)

GCMM/Properties/Settings.Designer.cs

@@ -73,13 +73,13 @@ namespace GCMM.Properties {
         
         [global::System.Configuration.UserScopedSettingAttribute()]
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
-        [global::System.Configuration.DefaultSettingValueAttribute("")]
-        public string SteamConfigFileForAutoLaunch {
+        [global::System.Configuration.DefaultSettingValueAttribute("0")]
+        public int SteamUserID {
             get {
-                return ((string)(this["SteamConfigFileForAutoLaunch"]));
+                return ((int)(this["SteamUserID"]));
             }
             set {
-                this["SteamConfigFileForAutoLaunch"] = value;
+                this["SteamUserID"] = value;
             }
         }
         

GCMM/Properties/Settings.settings

@@ -14,8 +14,8 @@
     <Setting Name="NeedsUpdate" Type="System.Boolean" Scope="User">
       <Value Profile="(Default)">True</Value>
     </Setting>
-    <Setting Name="SteamConfigFileForAutoLaunch" Type="System.String" Scope="User">
-      <Value Profile="(Default)" />
+    <Setting Name="SteamUserID" Type="System.Int32" Scope="User">
+      <Value Profile="(Default)">0</Value>
     </Setting>
     <Setting Name="AutoLaunch" Type="System.Boolean" Scope="User">
       <Value Profile="(Default)">True</Value>