Add a cache cleaner

Bloxstrap/Resources/Strings.resx

@@ -1407,4 +1407,19 @@ Defaulting to {1}.</value>
   <data name="Menu.FastFlagEditor.AllowlistInformation" xml:space="preserve">
     <value>Due to the [Fast Flag allowlist update]({0}), most custom Fast Flags will have no effect on the Roblox player.</value>
   </data>
+  <data name="Menu.Behaviour.CleanRobloxCache.Clean" xml:space="preserve">
+    <value>Clean</value>
+  </data>
+  <data name="Menu.Behaviour.CleanRobloxCache.Description" xml:space="preserve">
+    <value>Deletes all files in Roblox's cache directories to free up disk space. Games will temporarily load slower after this!</value>
+  </data>
+  <data name="Menu.Behaviour.CleanRobloxCache.Title" xml:space="preserve">
+    <value>Clean Roblox cache</value>
+  </data>
+  <data name="Dialog.CacheCleaner.Cleaned" xml:space="preserve">
+    <value>Successfully cleaned the cache.</value>
+  </data>
+  <data name="Dialog.CacheCleaner.FailedToClean" xml:space="preserve">
+    <value>Failed to clean the cache!</value>
+  </data>
 </root>

Bloxstrap/UI/Elements/Settings/Pages/BootstrapperPage.xaml

@@ -43,5 +43,11 @@
             </controls:OptionControl.Style>
             <ui:ToggleSwitch IsChecked="{Binding ForceRobloxReinstallation, Mode=TwoWay}" />
         </controls:OptionControl>
+
+        <controls:OptionControl
+            Header="{x:Static resources:Strings.Menu_Behaviour_CleanRobloxCache_Title}"
+            Description="{x:Static resources:Strings.Menu_Behaviour_CleanRobloxCache_Description}">
+            <ui:Button Icon="Delete48" Content="{x:Static resources:Strings.Menu_Behaviour_CleanRobloxCache_Clean}" Command="{Binding CleanRobloxCacheCommand}" Appearance="Danger" />
+        </controls:OptionControl>
     </StackPanel>
 </ui:UiPage>

Bloxstrap/UI/ViewModels/Settings/BehaviourViewModel.cs

@@ -1,4 +1,9 @@
-namespace Bloxstrap.UI.ViewModels.Settings
+using System.Linq;
+using System.Windows;
+using System.Windows.Input;
+using CommunityToolkit.Mvvm.Input;
+
+namespace Bloxstrap.UI.ViewModels.Settings
 {
     public class BehaviourViewModel : NotifyPropertyChangedViewModel
     {
@@ -21,5 +26,79 @@ public bool ForceRobloxReinstallation
             get => App.State.Prop.ForceReinstall || IsRobloxInstallationMissing;
             set => App.State.Prop.ForceReinstall = value;
         }
+
+        public ICommand CleanRobloxCacheCommand => new RelayCommand(CleanRobloxCache);
+
+        private void CleanRobloxCache()
+        {
+            const string LOG_IDENT = "BehaviourViewModel::CleanRobloxCache";
+
+            IEnumerable<FileInfo> files = Enumerable.Empty<FileInfo>();
+            IEnumerable<string> dirs = Enumerable.Empty<string>();
+
+            // all the cache folders i know of
+            string robloxTempFolder = Path.Combine(Path.GetTempPath(), "Roblox");
+            string robloxStorageFolder = Path.Combine(Paths.LocalAppData, "Roblox\\rbx-storage");
+            string dbFile = Path.Combine(Paths.LocalAppData, "Roblox\\rbx-storage.db"); // the other "rbx-storage" files are irrelevant
+
+            if (Directory.Exists(robloxTempFolder))
+            {
+                files = files.Concat(new DirectoryInfo(robloxTempFolder).GetFiles("*", SearchOption.AllDirectories));
+                dirs = dirs.Concat(Directory.GetDirectories(robloxTempFolder));
+            }
+
+            if (Directory.Exists(robloxStorageFolder))
+            {
+                files = files.Concat(new DirectoryInfo(robloxStorageFolder).GetFiles("*", SearchOption.AllDirectories));
+                dirs = dirs.Concat(Directory.GetDirectories(robloxStorageFolder));
+            }
+
+            if (File.Exists(dbFile))
+                files = files.Concat(new[] { new FileInfo(dbFile) });
+
+            if (!files.Any() && !dirs.Any())
+            {
+                Frontend.ShowMessageBox(Strings.Dialog_CacheCleaner_Cleaned, MessageBoxImage.Information);
+                return;
+            }
+
+            try
+            {
+                foreach (FileInfo file in files)
+                {
+                    try
+                    {
+                        file.Delete();
+                    }
+                    catch (Exception ex)
+                    {
+                        App.Logger.WriteLine(LOG_IDENT, $"Failed to delete file '{file.Name}'!");
+                        App.Logger.WriteException(LOG_IDENT, ex);
+                    }
+                }
+
+                // why not delete the folders aswell
+                foreach (string dir in dirs)
+                {
+                    try
+                    {
+                        Directory.Delete(dir, true);
+                    }
+                    catch (Exception ex)
+                    {
+                        App.Logger.WriteLine(LOG_IDENT, $"Failed to delete directory '{Path.GetFileName(dir)}'!");
+                        App.Logger.WriteException(LOG_IDENT, ex);
+                    }
+                }
+
+                Frontend.ShowMessageBox(Strings.Dialog_CacheCleaner_Cleaned, MessageBoxImage.Information);
+            }
+            catch (Exception ex)
+            {
+                App.Logger.WriteLine(LOG_IDENT, "Failed to clean the cache!");
+                App.Logger.WriteException(LOG_IDENT, ex);
+                Frontend.ShowMessageBox(Strings.Dialog_CacheCleaner_FailedToClean, MessageBoxImage.Error);
+            }
+        }
     }
 }