Started to factor out DbusRegistry from Endpoint

kordophoned/src/dbus/endpoint.rs

@@ -1,5 +1,5 @@
 use log::info;
-use std::sync::Arc;
+use std::sync::{Arc, Mutex};
 
 use dbus::{
     channel::{MatchingReceiver, Sender},
@@ -9,6 +9,72 @@ use dbus::{
 };
 use dbus_crossroads::Crossroads;
 
+#[derive(Clone)]
+pub struct DbusRegistry {
+    connection: Arc<SyncConnection>,
+    crossroads: Arc<Mutex<Crossroads>>,
+    message_handler_started: Arc<Mutex<bool>>,
+}
+
+impl DbusRegistry {
+    pub fn new(connection: Arc<SyncConnection>) -> Self {
+        let mut cr = Crossroads::new();
+        // Enable async support for the crossroads instance.
+        // (Currently irrelevant since dbus generates sync code)
+        cr.set_async_support(Some((
+            connection.clone(),
+            Box::new(|x| {
+                tokio::spawn(x);
+            }),
+        )));
+
+        Self {
+            connection,
+            crossroads: Arc::new(Mutex::new(cr)),
+            message_handler_started: Arc::new(Mutex::new(false)),
+        }
+    }
+
+    pub fn register_object<T, F, R>(&self, path: &str, implementation: T, register_fn: F)
+    where
+        T: Send + Clone + 'static,
+        F: Fn(&mut Crossroads) -> R,
+        R: IntoIterator<Item = dbus_crossroads::IfaceToken<T>>,
+    {
+        let dbus_path = String::from(path);
+        
+        let mut cr = self.crossroads.lock().unwrap();
+        let tokens: Vec<_> = register_fn(&mut cr).into_iter().collect();
+        cr.insert(dbus_path, &tokens, implementation);
+        
+        // Start message handler if not already started
+        let mut handler_started = self.message_handler_started.lock().unwrap();
+        if !*handler_started {
+            let crossroads_clone = self.crossroads.clone();
+            self.connection.start_receive(
+                MatchRule::new_method_call(),
+                Box::new(move |msg, conn| {
+                    let mut cr = crossroads_clone.lock().unwrap();
+                    cr.handle_message(msg, conn).is_ok()
+                }),
+            );
+            *handler_started = true;
+            info!(target: "dbus", "Started D-Bus message handler");
+        }
+
+        info!(target: "dbus", "Registered object at {} with {} interfaces", path, tokens.len());
+    }
+
+    pub fn send_signal<S>(&self, path: &str, signal: S) -> Result<u32, ()>
+    where
+        S: dbus::message::SignalArgs + dbus::arg::AppendAll,
+    {
+        let message = signal.to_emit_message(&Path::new(path).unwrap());
+        self.connection.send(message)
+    }
+}
+
+// Keep the old Endpoint struct for backward compatibility during transition
 #[derive(Clone)]
 pub struct Endpoint<T: Send + Clone + 'static> {
     connection: Arc<SyncConnection>,