Introduce MaybeError type

src/helpers.rs

@@ -10,4 +10,14 @@ macro_rules! push_error {
     ($e:expr) => {
         $crate::navigation::RootMessage::PushNotification($crate::notification::NotificationRequest::Error($e))
     }
+}
+
+#[inline(always)]
+pub fn into_result<R, E>(option: Option<R>, error: E) -> Result<R, E>{
+    if let Some(r) = option {
+        Ok(r)
+    }
+    else {
+        Err(error)
+    }
 }