Introduce MaybeError type

src/pages/repetition.rs

@@ -6,7 +6,7 @@ use crate::data::entities::{CardStatistics, DeckSettings, WordData};
 use crate::data_provider::voice::get_voice;
 use crate::navigation::Page::PreviousPage;
 use crate::navigation::{KeyPressedPage, NavigatedPage, Page, RootMessage};
-use crate::notification::NotificationData;
+use crate::notification::{MaybeError, NotificationData};
 use crate::styling::*;
 use crate::{push_error, push_error_task};
 use chrono::Local;
@@ -337,7 +337,7 @@ pub enum RepetitionMessage {
 async fn play_sound(
     sink: Arc<Option<MixerDeviceSink>>,
     text: String,
-) -> Result<(), NotificationData> {
+) -> MaybeError {
     let data = get_voice(text.as_str()).await?;
     spawn_blocking(move || {
         if let Some(sink) = sink.as_ref()
@@ -347,6 +347,6 @@ async fn play_sound(
         }
     })
     .await
-    .unwrap();
+    .expect("Playing sound failed");
     Ok(())
 }