Add server for game data (implement login sequence)

rc_services_room/src/operations/maintenancer.rs

@@ -0,0 +1,28 @@
+use std::collections::HashMap;
+
+use polariton_server::operations::{Operation, OperationCode};
+
+pub struct MaintenanceModeTeller;
+
+impl Operation for MaintenanceModeTeller {
+    type State = ();
+    type User = crate::UserTy;
+
+    fn handle(&self, _: polariton::operation::ParameterTable, _: &mut Self::State, _: &Self::User) -> polariton::operation::OperationResponse {
+        let mut resp_params = HashMap::new();
+        resp_params.insert(20 /* is in maintenance mode? */, polariton::operation::Typed::Bool(false.into()));
+        resp_params.insert(19 /* maintenace mode message */, polariton::operation::Typed::Str("OpenJam's servers are currently undergoing maintenance".into()));
+        polariton::operation::OperationResponse {
+            code: 20,
+            return_code: 0,
+            message: polariton::operation::Typed::Null,
+            params: resp_params.into(),
+        }
+    }
+}
+
+impl OperationCode for MaintenanceModeTeller {
+    fn op_code() -> u8 {
+        20
+    }
+}