1 files changed, 12 insertions, 4 deletions
diff --git a/launcher/modplatform/atlauncher/ATLPackInstallTask.h b/launcher/modplatform/atlauncher/ATLPackInstallTask.h
index f55873e9..a7124d59 100644
--- a/launcher/modplatform/atlauncher/ATLPackInstallTask.h
+++ b/launcher/modplatform/atlauncher/ATLPackInstallTask.h
@@ -46,10 +46,16 @@
 #include "minecraft/PackProfile.h"
 #include "meta/Version.h"
 
-#include <nonstd/optional>
+#include <optional>
 
 namespace ATLauncher {
 
+enum class InstallMode {
+    Install,
+    Reinstall,
+    Update,
+};
+
 class UserInteractionSupport {
 
 public:
@@ -75,7 +81,7 @@ class PackInstallTask : public InstanceTask
 Q_OBJECT
 
 public:
-    explicit PackInstallTask(UserInteractionSupport *support, QString packName, QString version);
+    explicit PackInstallTask(UserInteractionSupport *support, QString packName, QString version, InstallMode installMode = InstallMode::Install);
     virtual ~PackInstallTask(){}
 
     bool canAbort() const override { return true; }
@@ -99,6 +105,7 @@ private:
     bool createLibrariesComponent(QString instanceRoot, std::shared_ptr<PackProfile> profile);
     bool createPackComponent(QString instanceRoot, std::shared_ptr<PackProfile> profile);
 
+    void deleteExistingFiles();
     void installConfigs();
     void extractConfigs();
     void downloadMods();
@@ -117,6 +124,7 @@ private:
     NetJob::Ptr jobPtr;
     QByteArray response;
 
+    InstallMode m_install_mode;
     QString m_pack_name;
     QString m_pack_safe_name;
     QString m_version_name;
@@ -131,8 +139,8 @@ private:
     Meta::VersionPtr minecraftVersion;
     QMap<QString, Meta::VersionPtr> componentsToInstall;
 
-    QFuture<nonstd::optional<QStringList>> m_extractFuture;
-    QFutureWatcher<nonstd::optional<QStringList>> m_extractFutureWatcher;
+    QFuture<std::optional<QStringList>> m_extractFuture;
+    QFutureWatcher<std::optional<QStringList>> m_extractFutureWatcher;
 
     QFuture<bool> m_modExtractFuture;
     QFutureWatcher<bool> m_modExtractFutureWatcher;