feat: remove existing mod when updating/redownloading it

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/minecraft/mod/Mod.cpp

@@ -183,9 +183,12 @@ auto Mod::details() const -> const ModDetails&
 auto Mod::name() const -> QString
 {
     auto d_name = details().name;
-    if (!d_name.isEmpty()) {
+    if (!d_name.isEmpty())
         return d_name;
-    }
+
+    if (status() != ModStatus::NoMetadata)
+        return metadata()->name;
+
     return m_name;
 }
 

launcher/minecraft/mod/ModFolderModel.cpp

@@ -356,6 +356,20 @@ bool ModFolderModel::installMod(const QString &filename)
     return false;
 }
 
+bool ModFolderModel::uninstallMod(const QString& filename, bool preserve_metadata)
+{
+
+    for(auto mod : allMods()){
+        if(mod.fileinfo().fileName() == filename){
+            auto index_dir = indexDir();
+            mod.destroy(index_dir, preserve_metadata);
+            return true;
+        }
+    }
+
+    return false;
+}
+
 bool ModFolderModel::setModStatus(const QModelIndexList& indexes, ModStatusAction enable)
 {
     if(interaction_disabled) {

launcher/minecraft/mod/ModFolderModel.h

@@ -118,6 +118,8 @@ public:
      */
     bool installMod(const QString& filename);
 
+    bool uninstallMod(const QString& filename, bool preserve_metadata = false);
+
     /// Deletes all the selected mods
     bool deleteMods(const QModelIndexList &indexes);
 

launcher/minecraft/mod/tasks/LocalModUpdateTask.cpp

@@ -44,6 +44,11 @@ void LocalModUpdateTask::executeTask()
 {
     setStatus(tr("Updating index for mod:\n%1").arg(m_mod.name));
 
+    auto old_metadata = Metadata::get(m_index_dir, m_mod.name);
+    if (old_metadata.isValid()) {
+        emit hasOldMod(old_metadata.name, old_metadata.filename);
+    }
+
     auto pw_mod = Metadata::create(m_index_dir, m_mod, m_mod_version);
     Metadata::update(m_index_dir, pw_mod);
 

launcher/minecraft/mod/tasks/LocalModUpdateTask.h

@@ -37,6 +37,9 @@ class LocalModUpdateTask : public Task {
     //! Entry point for tasks.
     void executeTask() override;
 
+   signals:
+    void hasOldMod(QString name, QString filename);
+
    private:
     QDir m_index_dir;
     ModPlatform::IndexedPack& m_mod;