5 files changed, 29 insertions, 2 deletions
diff --git a/launcher/minecraft/mod/ShaderPack.cpp b/launcher/minecraft/mod/ShaderPack.cpp
index 6a9641de..2c094f26 100644
--- a/launcher/minecraft/mod/ShaderPack.cpp
+++ b/launcher/minecraft/mod/ShaderPack.cpp
@@ -22,7 +22,7 @@
 
 #include "ShaderPack.h"
 
-#include "minecraft/mod/tasks/LocalShaderPackParseTask.h"
+#include <QRegularExpression>
 
 void ShaderPack::setPackFormat(ShaderPackFormat new_format)
 {
@@ -35,3 +35,8 @@ bool ShaderPack::valid() const
 {
     return m_pack_format != ShaderPackFormat::INVALID;
 }
+
+bool ShaderPack::applyFilter(QRegularExpression filter) const
+{
+    return valid() && Resource::applyFilter(filter);
+}
diff --git a/launcher/minecraft/mod/ShaderPack.h b/launcher/minecraft/mod/ShaderPack.h
index ec0f9404..d07c124b 100644
--- a/launcher/minecraft/mod/ShaderPack.h
+++ b/launcher/minecraft/mod/ShaderPack.h
@@ -54,6 +54,7 @@ class ShaderPack : public Resource {
     void setPackFormat(ShaderPackFormat new_format);
 
     bool valid() const override;
+    [[nodiscard]] bool applyFilter(QRegularExpression filter) const override;
 
    protected:
     mutable QMutex m_data_lock;
diff --git a/launcher/minecraft/mod/ShaderPackFolderModel.h b/launcher/minecraft/mod/ShaderPackFolderModel.h
index 44ed37a4..186d0213 100644
--- a/launcher/minecraft/mod/ShaderPackFolderModel.h
+++ b/launcher/minecraft/mod/ShaderPackFolderModel.h
@@ -1,6 +1,9 @@
 #pragma once
 
 #include "ResourceFolderModel.h"
+#include "minecraft/mod/ShaderPack.h"
+#include "minecraft/mod/tasks/BasicFolderLoadTask.h"
+#include "minecraft/mod/tasks/LocalShaderPackParseTask.h"
 
 class ShaderPackFolderModel : public ResourceFolderModel {
     Q_OBJECT
@@ -9,4 +12,14 @@ class ShaderPackFolderModel : public ResourceFolderModel {
     explicit ShaderPackFolderModel(const QString& dir, BaseInstance* instance) : ResourceFolderModel(QDir(dir), instance) {}
 
     virtual QString id() const override { return "shaderpacks"; }
+
+    [[nodiscard]] Task* createUpdateTask() override
+    {
+        return new BasicFolderLoadTask(m_dir, [](QFileInfo const& entry) { return makeShared<ShaderPack>(entry); });
+    }
+
+    [[nodiscard]] Task* createParseTask(Resource& resource) override
+    {
+        return new LocalShaderPackParseTask(m_next_resolution_ticket, static_cast<ShaderPack&>(resource));
+    }
 };
diff --git a/launcher/ui/MainWindow.cpp b/launcher/ui/MainWindow.cpp
index 64873ebb..1202c331 100644
--- a/launcher/ui/MainWindow.cpp
+++ b/launcher/ui/MainWindow.cpp
@@ -363,7 +363,7 @@ MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent), ui(new Ui::MainWi
     // Shouldn't have to use lambdas here like this, but if I don't, the compiler throws a fit.
     // Template hell sucks...
     connect(APPLICATION->accounts().get(), &AccountList::defaultAccountChanged, [this] { defaultAccountChanged(); });
-    connect(APPLICATION->accounts().get(), &AccountList::listChanged, [this] { repopulateAccountsMenu(); });
+    connect(APPLICATION->accounts().get(), &AccountList::listChanged, [this] { defaultAccountChanged(); });
 
     // Show initial account
     defaultAccountChanged();
diff --git a/launcher/ui/pages/instance/ModFolderPage.cpp b/launcher/ui/pages/instance/ModFolderPage.cpp
index 69c34daf..625d3793 100644
--- a/launcher/ui/pages/instance/ModFolderPage.cpp
+++ b/launcher/ui/pages/instance/ModFolderPage.cpp
@@ -206,6 +206,14 @@ void ModFolderPage::installMods()
 
 void ModFolderPage::updateMods()
 {
+    if (m_instance->typeName() != "Minecraft")
+        return;  // this is a null instance or a legacy instance
+
+    auto profile = static_cast<MinecraftInstance*>(m_instance)->getPackProfile();
+    if (!profile->getModLoaders().has_value()) {
+        QMessageBox::critical(this, tr("Error"), tr("Please install a mod loader first!"));
+        return;
+    }
     auto selection = m_filterModel->mapSelectionToSource(ui->treeView->selectionModel()->selection()).indexes();
 
     auto mods_list = m_model->selectedMods(selection);