DolphinQt: Implement "Purge Game List Cache"

This is a missing feature from DolphinWX.

Source/Core/DolphinQt/GameList/GameList.cpp

@@ -89,6 +89,11 @@ GameList::GameList(QWidget* parent) : QStackedWidget(parent)
           [this] { m_grid_proxy->invalidate(); });
 }
 
+void GameList::PurgeCache()
+{
+  m_model->PurgeCache();
+}
+
 void GameList::MakeListView()
 {
   m_list = new QTableView(this);

Source/Core/DolphinQt/GameList/GameList.h

@@ -41,6 +41,8 @@ public:
 
   void resizeEvent(QResizeEvent* event) override;
 
+  void PurgeCache();
+
 signals:
   void GameSelected();
   void NetPlayHost(const QString& game_id);

Source/Core/DolphinQt/GameList/GameListModel.cpp

@@ -362,3 +362,8 @@ void GameListModel::DeleteTag(const QString& name)
 
   Settings::GetQSettings().setValue(QStringLiteral("gamelist/tags"), m_tag_list);
 }
+
+void GameListModel::PurgeCache()
+{
+  m_tracker.PurgeCache();
+}

Source/Core/DolphinQt/GameList/GameListModel.h

@@ -75,6 +75,8 @@ public:
   void NewTag(const QString& name);
   void DeleteTag(const QString& name);
 
+  void PurgeCache();
+
 private:
   // Index in m_games, or -1 if it isn't found
   int FindGame(const std::string& path) const;

Source/Core/DolphinQt/GameList/GameTracker.cpp

@@ -75,6 +75,9 @@ GameTracker::GameTracker(QObject* parent) : QFileSystemWatcher(parent)
           });
       QueueOnObject(this, [this] { Settings::Instance().NotifyMetadataRefreshComplete(); });
       break;
+    case CommandType::PurgeCache:
+      m_cache.Clear(UICommon::GameFileCache::DeleteOnDisk::Yes);
+      break;
     }
   });
 
@@ -322,3 +325,9 @@ void GameTracker::LoadGame(const QString& path)
       m_cache.Save();
   }
 }
+
+void GameTracker::PurgeCache()
+{
+  m_load_thread.EmplaceItem(Command{CommandType::PurgeCache, {}});
+  RefreshAll();
+}

Source/Core/DolphinQt/GameList/GameTracker.h

@@ -41,6 +41,7 @@ public:
   void AddDirectory(const QString& dir);
   void RemoveDirectory(const QString& dir);
   void RefreshAll();
+  void PurgeCache();
 
 signals:
   void GameLoaded(const std::shared_ptr<const UICommon::GameFile>& game);
@@ -70,7 +71,8 @@ private:
     RemoveDirectory,
     UpdateDirectory,
     UpdateFile,
-    UpdateMetadata
+    UpdateMetadata,
+    PurgeCache
   };
 
   struct Command

Source/Core/DolphinQt/MainWindow.cpp

@@ -385,6 +385,7 @@ void MainWindow::ConnectMenuBar()
   // View
   connect(m_menu_bar, &MenuBar::ShowList, m_game_list, &GameList::SetListView);
   connect(m_menu_bar, &MenuBar::ShowGrid, m_game_list, &GameList::SetGridView);
+  connect(m_menu_bar, &MenuBar::PurgeGameListCache, m_game_list, &GameList::PurgeCache);
   connect(m_menu_bar, &MenuBar::ToggleSearch, m_search_bar, &SearchBar::Toggle);
 
   connect(m_menu_bar, &MenuBar::ColumnVisibilityToggled, m_game_list,

Source/Core/DolphinQt/MenuBar.cpp

@@ -457,6 +457,8 @@ void MenuBar::AddViewMenu()
   AddShowPlatformsMenu(view_menu);
   AddShowRegionsMenu(view_menu);
 
+  view_menu->addSeparator();
+  view_menu->addAction(tr("Purge Game List Cache"), this, &MenuBar::PurgeGameListCache);
   view_menu->addSeparator();
   view_menu->addAction(tr("Search"), this, &MenuBar::ToggleSearch,
                        QKeySequence(QStringLiteral("Ctrl+F")));

Source/Core/DolphinQt/MenuBar.h

@@ -90,6 +90,7 @@ signals:
   // View
   void ShowList();
   void ShowGrid();
+  void PurgeGameListCache();
   void ToggleSearch();
   void ColumnVisibilityToggled(const QString& row, bool visible);
   void GameListPlatformVisibilityToggled(const QString& row, bool visible);

Source/Core/UICommon/GameFileCache.cpp

@@ -58,8 +58,11 @@ size_t GameFileCache::GetSize() const
   return m_cached_files.size();
 }
 
-void GameFileCache::Clear()
+void GameFileCache::Clear(DeleteOnDisk delete_on_disk)
 {
+  if (delete_on_disk != DeleteOnDisk::No)
+    File::Delete(m_path);
+
   m_cached_files.clear();
 }
 

Source/Core/UICommon/GameFileCache.h

@@ -24,13 +24,19 @@ std::vector<std::string> FindAllGamePaths(const std::vector<std::string>& direct
 class GameFileCache
 {
 public:
+  enum class DeleteOnDisk
+  {
+    No = 0,
+    Yes = 1,
+  };
+
   GameFileCache();  // Uses the default path
   explicit GameFileCache(std::string path);
 
   void ForEach(std::function<void(const std::shared_ptr<const GameFile>&)> f) const;
 
   size_t GetSize() const;
-  void Clear();
+  void Clear(DeleteOnDisk delete_on_disk);
 
   // Returns nullptr if the file is invalid.
   std::shared_ptr<const GameFile> AddOrGet(const std::string& path, bool* cache_changed);