feat(PluginManager): add DeleteConfiguration() and UI

Dalamud/Configuration/PluginConfigurations.cs

@@ -60,6 +60,22 @@ namespace Dalamud.Configuration
                 });
         }
 
+        /// <summary>
+        /// Delete the configuration file and folder for the specified plugin.
+        /// This will throw an <see cref="IOException"/> if the plugin did not correctly close its handles.
+        /// </summary>
+        /// <param name="pluginName">The name of the plugin.</param>
+        public void Delete(string pluginName)
+        {
+            var directory = this.GetDirectoryPath(pluginName);
+            if (directory.Exists)
+                directory.Delete(true);
+
+            var file = this.GetConfigFile(pluginName);
+            if (file.Exists)
+                file.Delete();
+        }
+
         /// <summary>
         /// Get plugin directory.
         /// </summary>

Dalamud/Interface/Internal/Windows/PluginInstallerWindow.cs

@@ -692,6 +692,25 @@ namespace Dalamud.Interface.Internal.Windows
 
                 ImGui.Unindent();
             }
+
+            if (ImGui.BeginPopupContextItem("InstalledItemContextMenu"))
+            {
+                if (ImGui.Selectable(Locs.PluginContext_DeletePluginConfig))
+                {
+                    Log.Debug($"Deleting config for {plugin.Manifest.InternalName}");
+
+                    Task.Run(() => this.dalamud.PluginManager.DeleteConfiguration(plugin))
+                        .ContinueWith(task =>
+                        {
+                            // There is no need to set as Complete for an individual plugin installation
+                            this.installStatus = OperationStatus.Idle;
+
+                            this.DisplayErrorContinuation(task, Locs.ErrorModal_DeleteConfigFail(plugin.Name));
+                        });
+                }
+
+                ImGui.EndPopup();
+            }
         }
 
         private void DrawPluginControlButton(LocalPlugin plugin)
@@ -1125,6 +1144,8 @@ namespace Dalamud.Interface.Internal.Windows
 
             public static string PluginContext_HidePlugin => Loc.Localize("InstallerHidePlugin", "Hide from installer");
 
+            public static string PluginContext_DeletePluginConfig => Loc.Localize("InstallerDeletePluginConfig", "Delete configuration data & reload");
+
             #endregion
 
             #region Plugin body
@@ -1199,6 +1220,8 @@ namespace Dalamud.Interface.Internal.Windows
 
             public static string ErrorModal_SingleUpdateFail(string name) => Loc.Localize("InstallerSingleUpdateFail", "Failed to update plugin {0}.").Format(name);
 
+            public static string ErrorModal_DeleteConfigFail(string name) => Loc.Localize("InstallerDeleteConfigFail", "Failed to reset the plugin {0}.\n\nThe plugin may not support this action. You can try deleting the configuration manually while the game is shut down - please see the FAQ.").Format(name);
+
             public static string ErrorModal_EnableFail(string name) => Loc.Localize("InstallerEnableFail", "Failed to enable plugin {0}.").Format(name);
 
             public static string ErrorModal_DisableFail(string name) => Loc.Localize("InstallerDisableFail", "Failed to disable plugin {0}.").Format(name);

Dalamud/Plugin/Internal/PluginManager.cs

@@ -8,7 +8,7 @@ using System.IO.Compression;
 using System.Linq;
 using System.Net;
 using System.Reflection;
-using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 
 using CheapLoc;
@@ -713,6 +713,32 @@ namespace Dalamud.Plugin.Internal
             return updateStatus;
         }
 
+        /// <summary>
+        /// Update a single plugin, provided a valid <see cref="AvailablePluginUpdate"/>.
+        /// </summary>
+        /// <param name="metadata">The available plugin update.</param>
+        /// <param name="notify">Whether to notify that installed plugins have changed afterwards.</param>
+        /// <param name="dryRun">Whether or not to actually perform the update, or just indicate success.</param>
+        /// <returns>The status of the update.</returns>
+        public void DeleteConfiguration(LocalPlugin plugin)
+        {
+            if (plugin.State == PluginState.InProgress)
+                throw new Exception("Cannot delete configuration for a loading/unloading plugin");
+
+            if (plugin.IsLoaded)
+                plugin.Unload();
+
+            // Let's wait so any handles on files in plugin configurations can be closed
+            Thread.Sleep(500);
+
+            this.PluginConfigs.Delete(plugin.Name);
+
+            Thread.Sleep(500);
+
+            // Let's indicate "installer" here since this is supposed to be a fresh install
+            plugin.Load(PluginLoadReason.Installer);
+        }
+
         /// <summary>
         /// Print to chat any plugin updates and whether they were successful.
         /// </summary>