Add network-layer multiplayer disconnect handling

rc_multiplayer/src/disconnect.rs

@@ -0,0 +1,29 @@
+pub struct ClientDisconnecter {
+    msg_router: tokio::sync::mpsc::Sender<crate::matches::GameMessage>,
+}
+
+pub(super) fn handler(init_ctx: &crate::InitConfig) -> ClientDisconnecter {
+    ClientDisconnecter::new(init_ctx)
+}
+
+impl ClientDisconnecter {
+    fn new(init_ctx: &crate::InitConfig) -> Self {
+        Self {
+            msg_router: init_ctx.matches_chann.clone(),
+        }
+    }
+}
+
+#[async_trait::async_trait]
+impl crate::DisconnectHandler for ClientDisconnecter {
+    async fn handle(&self, _peer: &std::sync::Arc<literustlib_server::Connection<crate::PacketData>>, user: &crate::UserData) {
+        if let Some(user_info) = user.user().await {
+            crate::events::log_channel_send_failure(self.msg_router.send(crate::matches::GameMessage::EndConnection {
+                user_id: user_info.user_id(),
+                is_unregister: false,
+            }).await);
+        } else {
+            log::error!("Failed to handle disconnect for unknown user");
+        }
+    }
+}