Introduce MaybeError type

src/data_provider/settings.rs

@@ -1,4 +1,4 @@
-use crate::notification::NotificationData;
+use crate::notification::{MaybeError, NotificationData};
 use crate::notification::NotificationData::{DbLoadError, DbSaveError};
 use iced::futures::StreamExt;
 use rusqlite::Connection;
@@ -22,7 +22,7 @@ pub fn set_setting(
     key: String,
     value: String,
     connection: &Connection,
-) -> Result<(), NotificationData> {
+) -> MaybeError {
     let current = get_settings_list(connection)?;
     if current.contains(&key) {
         update_settings(key, value, connection)?;
@@ -33,7 +33,7 @@ pub fn set_setting(
     Ok(())
 }
 
-pub fn delete_settings(key: String, connection: &Connection) -> Result<(), NotificationData> {
+pub fn delete_settings(key: String, connection: &Connection) -> MaybeError {
     connection
         .execute("DELETE FROM settings WHERE id = ?1", (&key,))
         .map_err(|_| DbSaveError)?;
@@ -44,7 +44,7 @@ fn create_settings(
     key: String,
     value: String,
     connection: &Connection,
-) -> Result<(), NotificationData> {
+) -> MaybeError {
     connection
         .execute(
             "INSERT into settings (id, value) VALUES (?1, ?2)",
@@ -58,7 +58,7 @@ fn update_settings(
     key: String,
     value: String,
     connection: &Connection,
-) -> Result<(), NotificationData> {
+) -> MaybeError {
     connection
         .execute(
             "update settings