feat: remove state and let rust handle

src-tauri/src/commands.rs

@@ -41,16 +41,28 @@ impl AppState {
     }
 }
 
+#[derive(serde::Serialize)]
+pub struct DSP408Snapshot {
+    pub state: types::DSPState,
+    pub meters: types::Meters,
+    pub mode: types::DSPMode,
+}
+
 #[tauri::command]
 pub fn create_dsp408(
     state: State<AppState>,
     ip: String,
     port: u16,
     device_id: u8,
+    demo: bool,
 ) -> Result<u64, String> {
     let ip = IpAddr::from_str(&ip).map_err(|e| e.to_string())?;
 
-    let dsp = DSP408::new(ip, port, device_id).map_err(|e| e.to_string())?;
+    let dsp = if demo {
+        DSP408::new_demo()
+    } else {
+        DSP408::new(ip, port, device_id).map_err(|e| e.to_string())?
+    };
 
     let mut next_id = state.next_id.lock().map_err(|e| e.to_string())?;
 
@@ -81,6 +93,20 @@ pub async fn remove_dsp408(state: State<'_, AppState>, id: u64) -> Result<(), St
     Ok(())
 }
 
+#[tauri::command]
+pub async fn get_dsp_snapshot(
+    state: State<'_, AppState>,
+    id: u64,
+) -> Result<DSP408Snapshot, String> {
+    state.with_device_mut(id, |device| {
+        Ok(DSP408Snapshot {
+            state: device.dsp.state().clone(),
+            meters: device.dsp.meters().clone(),
+            mode: device.dsp.mode(),
+        })
+    })
+}
+
 #[tauri::command]
 pub async fn connect_dsp408(state: State<'_, AppState>, id: u64) -> Result<(), String> {
     state.with_device_mut(id, |device| device.dsp.connect().map_err(|e| e.to_string()))
@@ -99,7 +125,7 @@ pub async fn get_dsp_state(
     id: u64,
 ) -> Result<dsp_thomann::dsp408::types::DSPState, String> {
     state.with_device_mut(id, |device| {
-        let dsp_state = device.dsp.state().map_err(|e| e.to_string())?;
+        let dsp_state = device.dsp.state();
 
         Ok(dsp_state.clone())
     })

src-tauri/src/lib.rs

@@ -11,6 +11,7 @@ pub fn run() {
         .invoke_handler(tauri::generate_handler![
             commands::create_dsp408,
             commands::remove_dsp408,
+            commands::get_dsp_snapshot,
             commands::get_dsp_state,
             commands::connect_dsp408,    // 0x10
             commands::disconnect_dsp408, // 0x11