implements sending

src/service/repository.vala

@@ -59,6 +59,14 @@ public class Repository : Object
 
         return returned_messages;
     }
+
+    public string send_message(string conversation_guid, string message) throws Error {
+        if (dbus_repository == null) {
+            throw new Error(1337, 1, "Repository not connected");
+        }
+
+        return dbus_repository.send_message(conversation_guid, message);
+    }
     
     private async void connect_to_dbus() {
         bool connected = false;