some little refactor, deleting assets

utils/CMakeLists.txt

@@ -0,0 +1,14 @@
+# SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+set(HEADERS
+    finalaction.h
+    helpers.h
+)
+
+set(SOURCES
+    finalaction.cpp
+    helpers.cpp
+)
+
+target_sources(magpie PRIVATE ${SOURCES})

utils/finalaction.cpp

@@ -0,0 +1,13 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "finalaction.h"
+
+FinalAction::FinalAction(const std::function<void()>& action):
+    action(action)
+{}
+
+FinalAction::~FinalAction() {
+    action();
+}
+

utils/finalaction.h

@@ -0,0 +1,22 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <functional>
+
+class FinalAction {
+public:
+    FinalAction(const std::function<void()>& action);
+    ~FinalAction();
+
+    FinalAction() = delete;
+    FinalAction(const FinalAction&) = delete;
+    FinalAction(FinalAction&&) = delete;
+    FinalAction& operator = (const FinalAction&) = delete;
+    FinalAction& operator = (FinalAction&&) = delete;
+
+private:
+    std::function<void()> action;
+};
+

utils/helpers.cpp

@@ -0,0 +1,5 @@
+//SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "helpers.h"
+

utils/helpers.h

@@ -0,0 +1,17 @@
+//SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <QVariant>
+#include <stdexcept>
+
+#define UNUSED(X) (void)(X)
+
+template <class T>
+const T& qast(const QVariant& variant) {
+    if (variant.userType() == qMetaTypeId<T>())
+        return *reinterpret_cast<const T*>(variant.data());
+
+    throw std::runtime_error("An usuccessfull qast");
+}