vibed a cached downloader for images

include/services/notificationController.hpp

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <memory>
+#include <vector>
+
+#include "gdkmm/monitor.h"
+class NotificationController {
+    static std::shared_ptr<NotificationController> instance;
+
+  public:
+    static std::shared_ptr<NotificationController> getInstance() {
+        if (!NotificationController::instance) {
+            NotificationController::instance = std::shared_ptr<NotificationController>(new NotificationController());
+        }
+        return NotificationController::instance;
+    }
+
+    void showSpotifyNotification(const std::string &title, const std::string &message, const std::string &artwork_url);
+    void showNotificationOnAllMonitors(const std::string &title, const std::string &message);
+  private:
+    NotificationController();
+    std::vector<std::shared_ptr<Gdk::Monitor>> activeMonitors;
+};