Support deleting plugin settings when uninstalling plugins

Flow.Launcher.Core/Plugin/PluginManager.cs

@@ -439,7 +439,7 @@ public static bool PluginModified(string uuid)
         public static void UpdatePlugin(PluginMetadata existingVersion, UserPlugin newVersion, string zipFilePath)
         {
             InstallPlugin(newVersion, zipFilePath, checkModified:false);
-            UninstallPlugin(existingVersion, removeSettings:false, checkModified:false);
+            UninstallPlugin(existingVersion, removePluginFromSettings:false, removePluginSettings:false, checkModified: false);
             _modifiedPlugins.Add(existingVersion.ID);
         }
 
@@ -454,9 +454,9 @@ public static void InstallPlugin(UserPlugin plugin, string zipFilePath)
         /// <summary>
         /// Uninstall a plugin.
         /// </summary>
-        public static void UninstallPlugin(PluginMetadata plugin, bool removeSettings = true)
+        public static void UninstallPlugin(PluginMetadata plugin, bool removePluginFromSettings = true, bool removePluginSettings = false)
         {
-            UninstallPlugin(plugin, removeSettings, true);
+            UninstallPlugin(plugin, removePluginFromSettings, removePluginSettings, true);
         }
 
         #endregion
@@ -529,19 +529,38 @@ internal static void InstallPlugin(UserPlugin plugin, string zipFilePath, bool c
             }
         }
 
-        internal static void UninstallPlugin(PluginMetadata plugin, bool removeSettings, bool checkModified)
+        internal static void UninstallPlugin(PluginMetadata plugin, bool removePluginFromSettings, bool removePluginSettings, bool checkModified)
         {
             if (checkModified && PluginModified(plugin.ID))
             {
                 throw new ArgumentException($"Plugin {plugin.Name} has been modified");
             }
 
-            if (removeSettings)
+            if (removePluginFromSettings)
             {
                 Settings.Plugins.Remove(plugin.ID);
                 AllPlugins.RemoveAll(p => p.Metadata.ID == plugin.ID);
             }
 
+            if (removePluginSettings)
+            {
+                var assemblyLoader = new PluginAssemblyLoader(plugin.ExecuteFilePath);
+                var assembly = assemblyLoader.LoadAssemblyAndDependencies();
+                var assemblyName = assembly.GetName().Name;
+
+                // if user want to remove the plugin settings, we cannot call save method for the plugin json storage instance of this plugin
+                // so we need to remove it from the api instance
+                var method = API.GetType().GetMethod("RemovePluginSettings");
+                var pluginJsonStorage = method?.Invoke(API, new object[] { assemblyName });
+
+                // if there exists a json storage for current plugin, we need to delete the directory path
+                if (pluginJsonStorage != null)
+                {
+                    var deleteMethod = pluginJsonStorage.GetType().GetMethod("DeleteDirectory");
+                    deleteMethod?.Invoke(pluginJsonStorage, null);
+                }
+            }
+
             // Marked for deletion. Will be deleted on next start up
             using var _ = File.CreateText(Path.Combine(plugin.PluginDirectory, "NeedDelete.txt"));
 

Flow.Launcher.Infrastructure/Storage/PluginJsonStorage.cs

@@ -3,14 +3,17 @@
 
 namespace Flow.Launcher.Infrastructure.Storage
 {
-    public class PluginJsonStorage<T> :JsonStorage<T> where T : new()
+    public class PluginJsonStorage<T> : JsonStorage<T> where T : new()
     {
+        // Use assembly name to check which plugin is using this storage
+        public readonly string AssemblyName;
+
         public PluginJsonStorage()
         {
             // C# related, add python related below
             var dataType = typeof(T);
-            var assemblyName = dataType.Assembly.GetName().Name;
-            DirectoryPath = Path.Combine(DataLocation.DataDirectory(), DirectoryName, Constant.Plugins, assemblyName);
+            AssemblyName = dataType.Assembly.GetName().Name;
+            DirectoryPath = Path.Combine(DataLocation.DataDirectory(), DirectoryName, Constant.Plugins, AssemblyName);
             Helper.ValidateDirectory(DirectoryPath);
 
             FilePath = Path.Combine(DirectoryPath, $"{dataType.Name}{FileSuffix}");
@@ -20,6 +23,13 @@ public PluginJsonStorage(T data) : this()
         {
             Data = data;
         }
+
+        public void DeleteDirectory()
+        {
+            if (Directory.Exists(DirectoryPath))
+            {
+                Directory.Delete(DirectoryPath, true);
+            }
+        }
     }
 }
-

Flow.Launcher/PublicAPIInstance.cs

@@ -189,6 +189,23 @@ public void LogException(string className, string message, Exception e,
 
         private readonly ConcurrentDictionary<Type, object> _pluginJsonStorages = new();
 
+        public object RemovePluginSettings(string assemblyName)
+        {
+            foreach (var keyValuePair in _pluginJsonStorages)
+            {
+                var key = keyValuePair.Key;
+                var value = keyValuePair.Value;
+                var name = value.GetType().GetField("AssemblyName")?.GetValue(value)?.ToString();
+                if (name == assemblyName)
+                {
+                    _pluginJsonStorages.Remove(key, out var pluginJsonStorage);
+                    return pluginJsonStorage;
+                }
+            }
+
+            return null;
+        }
+
         /// <summary>
         /// Save plugin settings.
         /// </summary>

Plugins/Flow.Launcher.Plugin.PluginsManager/Languages/en.xaml

@@ -15,6 +15,8 @@
     <system:String x:Key="plugin_pluginsmanager_installing_plugin">Installing Plugin</system:String>
     <system:String x:Key="plugin_pluginsmanager_install_from_web">Download and install {0}</system:String>
     <system:String x:Key="plugin_pluginsmanager_uninstall_title">Plugin Uninstall</system:String>
+    <system:String x:Key="plugin_pluginsmanager_keep_plugin_settings_title">Keep plugin settings</system:String>
+    <system:String x:Key="plugin_pluginsmanager_keep_plugin_settings_subtitle">Do you want to keep the settings of the plugin for the next usage?</system:String>
     <system:String x:Key="plugin_pluginsmanager_install_success_restart">Plugin {0} successfully installed. Restarting Flow, please wait...</system:String>
     <system:String x:Key="plugin_pluginsmanager_install_errormetadatafile">Unable to find the plugin.json metadata file from the extracted zip file.</system:String>
     <system:String x:Key="plugin_pluginsmanager_install_error_duplicate">Error: A plugin which has the same or greater version with {0} already exists.</system:String>
@@ -37,13 +39,13 @@
     <system:String x:Key="plugin_pluginsmanager_update_success_restart">Plugin {0} successfully updated. Restarting Flow, please wait...</system:String>
     <system:String x:Key="plugin_pluginsmanager_install_unknown_source_warning_title">Installing from an unknown source</system:String>
     <system:String x:Key="plugin_pluginsmanager_install_unknown_source_warning">You are installing this plugin from an unknown source and it may contain potential risks!{0}{0}Please ensure you understand where this plugin is from and that it is safe.{0}{0}Would you like to continue still?{0}{0}(You can switch off this warning via settings)</system:String>
-    
+
     <system:String x:Key="plugin_pluginsmanager_install_success_no_restart">Plugin {0} successfully installed. Please restart Flow.</system:String>
     <system:String x:Key="plugin_pluginsmanager_uninstall_success_no_restart">Plugin {0} successfully uninstalled. Please restart Flow.</system:String>
     <system:String x:Key="plugin_pluginsmanager_update_success_no_restart">Plugin {0} successfully updated. Please restart Flow.</system:String>
     <system:String x:Key="plugin_pluginsmanager_update_all_success_no_restart">{0} plugins successfully updated. Please restart Flow.</system:String>
     <system:String x:Key="plugin_pluginsmanager_plugin_modified_error">Plugin {0} has already been modified. Please restart Flow before making any further changes.</system:String>
-   
+
     <!--  Plugin Infos  -->
     <system:String x:Key="plugin_pluginsmanager_plugin_name">Plugins Manager</system:String>
     <system:String x:Key="plugin_pluginsmanager_plugin_description">Management of installing, uninstalling or updating Flow Launcher plugins</system:String>

Plugins/Flow.Launcher.Plugin.PluginsManager/PluginsManager.cs

@@ -682,7 +682,11 @@ private void Uninstall(PluginMetadata plugin)
         {
             try
             {
-                PluginManager.UninstallPlugin(plugin, removeSettings: true);
+                var removePluginSettings = Context.API.ShowMsgBox(
+                    Context.API.GetTranslation("plugin_pluginsmanager_keep_plugin_settings_subtitle"),
+                    Context.API.GetTranslation("plugin_pluginsmanager_keep_plugin_settings_title"),
+                    button: MessageBoxButton.YesNo) == MessageBoxResult.No;
+                PluginManager.UninstallPlugin(plugin, removePluginFromSettings: true, removePluginSettings: removePluginSettings);
             }
             catch (ArgumentException e)
             {