feat(network): add selectable privacy-preserving discovery

network/connection_route.gd

@@ -3,22 +3,65 @@ extends RefCounted
 
 enum Kind {
 	DIRECT,
+	DISCOVERY_DIRECT,
+	DISCOVERY_RELAY,
 }
 
 var kind: Kind = Kind.DIRECT
 var direct_endpoint: ConnectionEndpoint
 var display_description: String = ""
+var discovery_room_id: String = ""
 
 
 static func direct(endpoint: ConnectionEndpoint) -> ConnectionRoute:
 	var route := ConnectionRoute.new()
 	route.kind = Kind.DIRECT
 	route.direct_endpoint = endpoint
+	route.display_description = "direct server" if endpoint != null else ""
+	return route
+
+
+static func discovery_direct(
+	endpoint: ConnectionEndpoint,
+	room_id: String,
+	room_name: String,
+) -> ConnectionRoute:
+	var route := ConnectionRoute.new()
+	route.kind = Kind.DISCOVERY_DIRECT
+	route.direct_endpoint = endpoint
+	route.discovery_room_id = room_id
+	var cleaned_name := room_name.strip_edges()
 	route.display_description = (
-		endpoint.normalized_display if endpoint != null else ""
+		cleaned_name if not cleaned_name.is_empty() else "public room"
 	)
 	return route
 
 
+static func discovery_relay(
+	endpoint: ConnectionEndpoint,
+	room_id: String,
+	room_name: String,
+) -> ConnectionRoute:
+	var route := discovery_direct(endpoint, room_id, room_name)
+	route.kind = Kind.DISCOVERY_RELAY
+	return route
+
+
 func is_valid() -> bool:
-	return kind == Kind.DIRECT and direct_endpoint != null and direct_endpoint.is_valid()
+	return (
+		kind in [Kind.DIRECT, Kind.DISCOVERY_DIRECT, Kind.DISCOVERY_RELAY]
+		and direct_endpoint != null
+		and direct_endpoint.is_valid()
+		and (
+			kind == Kind.DIRECT
+			or not discovery_room_id.is_empty()
+		)
+	)
+
+
+func is_discovery_join() -> bool:
+	return kind in [Kind.DISCOVERY_DIRECT, Kind.DISCOVERY_RELAY]
+
+
+func is_relay() -> bool:
+	return kind == Kind.DISCOVERY_RELAY