src/app.rs

@@ -95,7 +95,7 @@ pub fn fill_state(state: &mut AppState) {
     let setting = load_settings(&state.connection);
 
     state.dictionary = list;
-    state.decks = sets;
+    state.decks = sets.unwrap_or_default();
     state.word_groups = groups;
     state.sync_data = setting
 }

src/data_provider/card_sets.rs

@@ -2,11 +2,13 @@ use crate::core::srs::OrderMode;
 
 use crate::data::entities::DeckSettings;
 use rusqlite::Connection;
+use crate::notification::NotificationData;
+use crate::notification::NotificationData::{DbLoadError, DbSaveError};
 
-pub fn load_sets(connection: &Connection) -> Vec<DeckSettings> {
+pub fn load_sets(connection: &Connection) -> Result<Vec<DeckSettings>, NotificationData> {
     let mut stmt = connection
         .prepare("SELECT id, name, forward, backward, filter FROM card_set")
-        .unwrap();
+        .expect("Failed to prepare state query");
     let iter = stmt
         .query_map([], |row| {
             Ok(DeckSettings {
@@ -19,17 +21,17 @@ pub fn load_sets(connection: &Connection) -> Vec<DeckSettings> {
                 open_mode: OrderMode::Default,
             })
         })
-        .unwrap();
+        .map_err(|_| DbLoadError)?;
 
     let mut buffer = vec![];
-    for word in iter {
-        buffer.push(word.unwrap());
+    for word in iter.filter_map(|result| result.ok()) {
+        buffer.push(word);
     }
 
-    buffer
+    Ok(buffer)
 }
 
-pub fn add_set(set: &mut DeckSettings, connection: &Connection) {
+pub fn add_set(set: &mut DeckSettings, connection: &Connection) -> Result<(), NotificationData> {
     let index : u32 = connection
         .query_row(
             "INSERT INTO card_set (name, forward, backward, filter) VALUES (?1, ?2, ?3, ?4) RETURNING id",
@@ -41,14 +43,15 @@ pub fn add_set(set: &mut DeckSettings, connection: &Connection) {
             ),
             |row| row.get(0)
         )
-        .unwrap();
+        .map_err(|_| DbSaveError)?;
 
     set.id = index.into();
+    Ok(())
 }
 
-pub fn update_deck(set: &mut DeckSettings, connection: &Connection) {
+pub fn update_deck(set: &mut DeckSettings, connection: &Connection) -> Result<(), NotificationData> {
     if !set.id.is_valid() {
-        add_set(set, connection);
+        add_set(set, connection)?;
     } else {
         connection
             .execute(
@@ -61,15 +64,17 @@ pub fn update_deck(set: &mut DeckSettings, connection: &Connection) {
                     &set.id
                 ),
             )
-            .unwrap();
+            .map_err(|_| DbSaveError)?;
     }
+    Ok(())
 }
 
-pub fn delete_set(set: &DeckSettings, connection: &Connection) {
+pub fn delete_set(set: &DeckSettings, connection: &Connection) -> Result<(), NotificationData> {
     if !set.id.is_valid() {
-        return;
+        return Err(DbSaveError);
     }
     connection
         .execute("DELETE FROM card_set WHERE id = ?1", (&set.id,))
-        .unwrap();
+        .map_err(|_| DbSaveError)?;
+    Ok(())
 }

src/navigation.rs

@@ -77,7 +77,8 @@ pub enum RootMessage {
     None,
     UpdateData,
 }
-
+#[allow(clippy::enum_variant_names)]
+#[allow(clippy::large_enum_variant)]
 pub enum Page {
     Selector(SelectorState),
     Quiz(QuizState),

src/notification.rs

@@ -157,6 +157,12 @@ impl NotificationManager {
             NotificationData::WebApiUnavailable => {
                 text!("Не получается подключиться к Api")
             }
+            NotificationData::DbSaveError => {
+                text!("Не получается сохранить данные")
+            }
+            NotificationData::DbLoadError => {
+                text!("Не получается загрузить данные")
+            }
         }
         .width(Fill)
         .into()
@@ -179,4 +185,6 @@ pub enum NotificationData {
     OpenFileError,
     VoiceVoxUnavailable,
     WebApiUnavailable,
+    DbSaveError,
+    DbLoadError,
 }

src/pages/repetition_settings.rs

@@ -1,8 +1,10 @@
-
+use crate::app::AppState;
+use crate::data::entities::DeckSettings;
 use crate::data_provider::card_sets::{delete_set, update_deck};
 use crate::data_provider::card_stats::{delete_stats, load_stats_of_deck};
 use crate::navigation::Page::PreviousPage;
 use crate::navigation::{NavigatedPage, Page, RootMessage};
+use crate::notification::NotificationRequest;
 use crate::pages::repetition_settings::RepetitionSettingsMessage::*;
 use crate::styling::*;
 use iced::widget::button::danger;
@@ -10,12 +12,10 @@ use iced::widget::text_input::Catalog;
 use iced::widget::{button, column, row, scrollable, space, text, text_input};
 use iced::{Element, Task};
 use iced_core::Length::Fill;
-use iced_core::{Padding, Theme, color};
+use iced_core::{color, Padding, Theme};
 use parking_lot::Mutex;
 use std::sync::Arc;
 use std::time::Duration;
-use crate::app::AppState;
-use crate::data::entities::DeckSettings;
 
 pub struct RepetitionSettingsState {
     set: DeckSettings,
@@ -61,7 +61,9 @@ impl NavigatedPage<RepetitionSettingsMessage> for RepetitionSettingsState {
             Back => {}
             Save => {
                 let mut state = self.state.lock();
-                update_deck(&mut self.set, &state.connection);
+                if let Err(e) = update_deck(&mut self.set, &state.connection) {
+                    return Task::done(RootMessage::PushNotification(NotificationRequest::Error(e)));
+                }
                 if self.filter_changed {
                     update_deck_stats(&self.set, &state);
                 }
@@ -95,7 +97,10 @@ impl NavigatedPage<RepetitionSettingsMessage> for RepetitionSettingsState {
                     });
                 }
                 let mut state = self.state.lock();
-                delete_set(&self.set, &state.connection);
+                if let Err(e) = delete_set(&self.set, &state.connection) {
+                    return Task::done(RootMessage::PushNotification(NotificationRequest::Error(e)));
+                }
+
                 state.decks.remove(self.index);
                 return Task::done(RootMessage::RepetitionSettings(Back));
             }

src/pages/repetitions.rs

@@ -27,6 +27,7 @@ use iced_core::svg::Handle;
 use parking_lot::Mutex;
 use std::ops::Deref;
 use std::sync::Arc;
+use crate::notification::NotificationRequest;
 
 #[derive(Clone)]
 pub struct RepetitionsState {
@@ -146,7 +147,9 @@ impl NavigatedPage<RepetitionsMessage> for RepetitionsState {
                 let mut deck = self.selected_deck().unwrap().clone();
                 let mut state = self.state.lock();
                 {
-                    update_deck(&mut deck.general_settings, &state.connection);
+                    if let Err(e) = update_deck(&mut deck.general_settings, &state.connection){
+                        return Task::done(RootMessage::PushNotification(NotificationRequest::Error(e)))
+                    }
                     if let Some(index) = deck.index {
                         state.decks[index] = deck.general_settings.clone();
                     } else {