Code cleanup part 2: Huge ass refactor edition

src/device_notification_client.rs

@@ -0,0 +1,56 @@
+use windows::{
+    Win32::{
+        Media::Audio::{
+            IMMNotificationClient, IMMNotificationClient_Impl,
+        },
+    },
+};
+
+#[windows::core::implement(IMMNotificationClient)]
+pub(crate) struct DeviceNotificationClient {
+    pub(crate) callback: Box<dyn Fn(&windows::core::PCWSTR)>
+}
+
+impl Drop for DeviceNotificationClient {
+    fn drop(&mut self) {
+        println!("DNC drop");
+    }
+}
+
+impl IMMNotificationClient_Impl for DeviceNotificationClient {
+    fn OnDeviceStateChanged(
+        &self,
+        _pwstrdeviceid: &windows::core::PCWSTR,
+        _dwnewstate: u32,
+    ) -> windows::core::Result<()> {
+        Ok(())
+    }
+
+    fn OnDeviceAdded(&self, pwstrdeviceid: &windows::core::PCWSTR) -> windows::core::Result<()> {
+        (self.callback)(pwstrdeviceid);
+        Ok(())
+    }
+
+    fn OnDeviceRemoved(&self, _pwstrdeviceid: &windows::core::PCWSTR) -> windows::core::Result<()> {
+        println!("OnDeviceRemoved");
+        // TODO: Remove device and all its sessions
+        Ok(())
+    }
+
+    fn OnDefaultDeviceChanged(
+        &self,
+        _flow: windows::Win32::Media::Audio::EDataFlow,
+        _role: windows::Win32::Media::Audio::ERole,
+        _pwstrdefaultdeviceid: &windows::core::PCWSTR,
+    ) -> windows::core::Result<()> {
+        Ok(())
+    }
+
+    fn OnPropertyValueChanged(
+        &self,
+        _pwstrdeviceid: &windows::core::PCWSTR,
+        _key: &windows::Win32::UI::Shell::PropertiesSystem::PROPERTYKEY,
+    ) -> windows::core::Result<()> {
+        Ok(())
+    }
+}