Add initial cleaning functions, to be improved.

Penumbra/Collections/Manager/CollectionStorage.cs

@@ -194,12 +194,16 @@ public class CollectionStorage : IReadOnlyList<ModCollection>, IDisposable, ISer
     }
 
     /// <summary> Remove all settings for not currently-installed mods from the given collection. </summary>
-    public void CleanUnavailableSettings(ModCollection collection)
+    public int CleanUnavailableSettings(ModCollection collection)
     {
-        var any = collection.Settings.Unused.Count > 0;
-        ((Dictionary<string, ModSettings.SavedSettings>)collection.Settings.Unused).Clear();
-        if (any)
+        var count = collection.Settings.Unused.Count;
+        if (count > 0)
+        {
+            ((Dictionary<string, ModSettings.SavedSettings>)collection.Settings.Unused).Clear();
             _saveService.QueueSave(new ModCollectionSave(_modStorage, collection));
+        }
+
+        return count;
     }
 
     /// <summary> Remove a specific setting for not currently-installed mods from the given collection. </summary>

Penumbra/Services/CleanupService.cs

@@ -0,0 +1,74 @@
+using OtterGui.Services;
+using Penumbra.Collections.Manager;
+using Penumbra.Mods.Manager;
+
+namespace Penumbra.Services;
+
+public class CleanupService(SaveService saveService, ModManager mods, CollectionManager collections) : IService
+{
+    public void CleanUnusedLocalData()
+    {
+        var usedFiles = mods.Select(saveService.FileNames.LocalDataFile).ToHashSet();
+        foreach (var file in saveService.FileNames.LocalDataFiles.ToList())
+        {
+            try
+            {
+                if (!file.Exists || usedFiles.Contains(file.FullName))
+                    continue;
+
+                file.Delete();
+                Penumbra.Log.Information($"[CleanupService] Deleted unused local data file {file.Name}.");
+            }
+            catch (Exception ex)
+            {
+                Penumbra.Log.Error($"[CleanupService] Failed to delete unused local data file {file.Name}:\n{ex}");
+            }
+        }
+    }
+
+    public void CleanBackupFiles()
+    {
+        foreach (var file in mods.BasePath.EnumerateFiles("group_*.json.bak", SearchOption.AllDirectories))
+        {
+            try
+            {
+                if (!file.Exists)
+                    continue;
+
+                file.Delete();
+                Penumbra.Log.Information($"[CleanupService] Deleted group backup file {file.FullName}.");
+            }
+            catch (Exception ex)
+            {
+                Penumbra.Log.Error($"[CleanupService] Failed to delete group backup file {file.FullName}:\n{ex}");
+            }
+        }
+
+        foreach (var file in Directory.EnumerateFiles(saveService.FileNames.ConfigDirectory, "*.json.bak", SearchOption.AllDirectories))
+        {
+            try
+            {
+                if (!File.Exists(file))
+                    continue;
+
+                File.Delete(file);
+                Penumbra.Log.Information($"[CleanupService] Deleted config backup file {file}.");
+            }
+            catch (Exception ex)
+            {
+                Penumbra.Log.Error($"[CleanupService] Failed to delete config backup file {file}:\n{ex}");
+            }
+        }
+    }
+
+    public void CleanupAllUnusedSettings()
+    {
+        foreach (var collection in collections.Storage)
+        {
+            var count = collections.Storage.CleanUnavailableSettings(collection);
+            if (count > 0)
+                Penumbra.Log.Information(
+                    $"[CleanupService] Removed {count} unused settings from collection {collection.Identity.AnonymizedName}.");
+        }
+    }
+}

Penumbra/UI/Tabs/SettingsTab.cs

@@ -49,6 +49,7 @@ public class SettingsTab : ITab, IUiService
     private readonly CrashHandlerService         _crashService;
     private readonly MigrationSectionDrawer      _migrationDrawer;
     private readonly CollectionAutoSelector      _autoSelector;
+    private readonly CleanupService              _cleanupService;
 
     private int _minimumX = int.MaxValue;
     private int _minimumY = int.MaxValue;
@@ -60,7 +61,7 @@ public class SettingsTab : ITab, IUiService
         CharacterUtility characterUtility, ResidentResourceManager residentResources, ModExportManager modExportManager, HttpApi httpApi,
         DalamudSubstitutionProvider dalamudSubstitutionProvider, FileCompactor compactor, DalamudConfigService dalamudConfig,
         IDataManager gameData, PredefinedTagManager predefinedTagConfig, CrashHandlerService crashService,
-        MigrationSectionDrawer migrationDrawer, CollectionAutoSelector autoSelector)
+        MigrationSectionDrawer migrationDrawer, CollectionAutoSelector autoSelector, CleanupService cleanupService)
     {
         _pluginInterface             = pluginInterface;
         _config                      = config;
@@ -84,6 +85,7 @@ public class SettingsTab : ITab, IUiService
         _crashService         = crashService;
         _migrationDrawer      = migrationDrawer;
         _autoSelector         = autoSelector;
+        _cleanupService       = cleanupService;
     }
 
     public void DrawHeader()
@@ -789,9 +791,13 @@ public class SettingsTab : ITab, IUiService
         DrawWaitForPluginsReflection();
         DrawEnableHttpApiBox();
         DrawEnableDebugModeBox();
+        ImGui.Separator();
         DrawReloadResourceButton();
         DrawReloadFontsButton();
+        ImGui.Separator();
+        DrawCleanupButtons();
         ImGui.NewLine();
+
     }
 
     private void DrawCrashHandler()
@@ -982,6 +988,29 @@ public class SettingsTab : ITab, IUiService
             _fontReloader.Reload();
     }
 
+    private void DrawCleanupButtons()
+    {
+        var enabled = _config.DeleteModModifier.IsActive();
+        if (ImUtf8.ButtonEx("Clear Unused Local Mod Data Files"u8,
+                "Delete all local mod data files that do not correspond to currently installed mods."u8, default, !enabled))
+            _cleanupService.CleanUnusedLocalData();
+        if (!enabled)
+            ImUtf8.HoverTooltip($"Hold {_config.DeleteModModifier} while clicking to delete files.");
+
+        if (ImUtf8.ButtonEx("Clear Backup Files"u8,
+                "Delete all backups of .json configuration files in your configuration folder and all backups of mod group files in your mod directory."u8,
+                default, !enabled))
+            _cleanupService.CleanBackupFiles();
+        if (!enabled)
+            ImUtf8.HoverTooltip($"Hold {_config.DeleteModModifier} while clicking to delete files.");
+
+        if (ImUtf8.ButtonEx("Clear All Unused Settings"u8,
+                "Remove all mod settings in all of your collections that do not correspond to currently installed mods."u8, default, !enabled))
+            _cleanupService.CleanupAllUnusedSettings();
+        if (!enabled)
+            ImUtf8.HoverTooltip($"Hold {_config.DeleteModModifier} while clicking to remove settings.");
+    }
+
     /// <summary> Draw a checkbox that toggles the dalamud setting to wait for plugins on open. </summary>
     private void DrawWaitForPluginsReflection()
     {