Added Undo button in delete snackbar

Author: tb-rules10

lib/Api/torrent_api.dart

@@ -17,6 +17,8 @@ import 'package:flood_mobile/Services/file_folder_nester.dart';
 import 'package:flood_mobile/l10n/l10n.dart';
 
 class TorrentApi {
+  static List<int>? undoDeletes;
+
   // Gets list of torrents
   static Stream<List<TorrentModel>> getAllTorrents(
       {required BuildContext context}) async* {
@@ -245,7 +247,7 @@ class TorrentApi {
       String url =
           BlocProvider.of<ApiBloc>(context, listen: false).state.baseUrl +
               ApiEndpoints.deleteTorrent;
-      print('---DELETE TORRENT---');
+      print('---STARTING DELETE---');
       print(url);
       Response response;
       Dio dio = new Dio();
@@ -260,6 +262,9 @@ class TorrentApi {
       mp['deleteData'] = deleteWithData;
       String rawBody = json.encode(mp);
       print(rawBody);
+      await Future.delayed(Duration(seconds: 4));
+      if (undoDeletes == id) return;
+      print('---DELETING TORRENT---');
       response = await dio.post(
         url,
         data: rawBody,
@@ -274,6 +279,14 @@ class TorrentApi {
       print('--ERROR IN TORRENT DELETE--');
       print(error.toString());
     }
+    undoDeletes = null;
+  }
+
+  static Future<void> undoDelete({
+    required List<int> id,
+  }) async {
+    print('---UNDO DELETE---');
+    undoDeletes = id;
   }
 
   static Stream<Map<String, dynamic>> getTorrentContent({

lib/Pages/widgets/delete_torrent_sheet.dart

@@ -4,6 +4,9 @@ import 'package:flood_mobile/Blocs/theme_bloc/theme_bloc.dart';
 import 'package:flood_mobile/Model/torrent_model.dart';
 import 'package:flood_mobile/Pages/widgets/flood_snackbar.dart';
 import 'package:flood_mobile/l10n/l10n.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+
+import '../../Blocs/home_screen_bloc/home_screen_bloc.dart';
 
 class DeleteTorrentSheet extends StatefulWidget {
   final int themeIndex;
@@ -118,6 +121,21 @@ class _DeleteTorrentSheetState extends State<DeleteTorrentSheet> {
                   ),
                   child: ElevatedButton(
                     onPressed: () {
+                      final homeScreenBloc =
+                          BlocProvider.of<HomeScreenBloc>(context);
+                      List<TorrentModel> torrentList =
+                          homeScreenBloc.state.torrentList;
+
+                      List<TorrentModel> remainingTorrents = torrentList
+                          .where((torrent) => !widget.torrents.any(
+                              (deletedTorrent) => deletedTorrent == torrent))
+                          .toList();
+
+                      final SetTorrentListEvent setTorrentListEvent =
+                          SetTorrentListEvent(
+                              newTorrentList: remainingTorrents);
+                      homeScreenBloc.add(setTorrentListEvent);
+
                       List<String> hashes = [];
                       widget.torrents.forEach((element) {
                         hashes.add(element.hash);
@@ -132,7 +150,13 @@ class _DeleteTorrentSheetState extends State<DeleteTorrentSheet> {
                       final deleteTorrentSnackBar = addFloodSnackBar(
                           SnackbarType.caution,
                           context.l10n.torrent_delete_snackbar,
-                          context.l10n.button_dismiss);
+                          context.l10n.button_dismiss,
+                          undoText: context.l10n.button_undo, undoFunction: () {
+                        final SetTorrentListEvent setTorrentListEvent =
+                            SetTorrentListEvent(newTorrentList: torrentList);
+                        homeScreenBloc.add(setTorrentListEvent);
+                        TorrentApi.undoDelete(id: widget.indexes);
+                      });
 
                       ScaffoldMessenger.of(context).clearSnackBars();
                       ScaffoldMessenger.of(context)

lib/Pages/widgets/flood_snackbar.dart

@@ -9,15 +9,18 @@ enum SnackbarType {
 SnackBar addFloodSnackBar(
   SnackbarType snackbarType,
   String title,
-  String ctaText,
-) {
+  String ctaText, {
+  String? undoText,
+  VoidCallback? undoFunction,
+}) {
   return SnackBar(
     backgroundColor: snackbarType == SnackbarType.success
         ? Colors.greenAccent
         : snackbarType == SnackbarType.information
             ? Colors.lightBlueAccent
             : Colors.orange,
     content: Row(
+      mainAxisAlignment: MainAxisAlignment.spaceBetween,
       children: [
         Icon(
           snackbarType == SnackbarType.success
@@ -29,7 +32,7 @@ SnackBar addFloodSnackBar(
           size: 20,
         ),
         SizedBox(
-          width: 8,
+          width: undoText == null ? 8 : 12,
         ),
         Expanded(
           child: Text(
@@ -41,6 +44,27 @@ SnackBar addFloodSnackBar(
             ),
           ),
         ),
+        Visibility(
+          visible: undoText != null,
+          child: Row(
+            children: [
+              SizedBox(
+                width: 8,
+              ),
+              TextButton(
+                onPressed: undoFunction,
+                child: Text(
+                  undoText ?? "Undo",
+                  overflow: TextOverflow.ellipsis,
+                  maxLines: 2,
+                  style: TextStyle(
+                    color: Colors.white,
+                  ),
+                ),
+              ),
+            ],
+          ),
+        )
       ],
     ),
     action: SnackBarAction(

lib/l10n/arb/app_ar.arb

@@ -326,5 +326,6 @@
     "tag_selection_heading": "تفضيلات محدد الوسوم",
     "single_selection_radio_button": "اختيار واحد",
     "multi_selection_radio_button": "اختيار متعدد",
-    "show_progress_bar_option": "عرض شريط التقدم"
+    "show_progress_bar_option": "عرض شريط التقدم",
+    "button_undo": "تراجع" 
 }

lib/l10n/arb/app_cs.arb

@@ -326,5 +326,6 @@
     "tag_selection_heading": "Předvolba výběru značek",
     "single_selection_radio_button": "Jednoduchý výběr",
     "multi_selection_radio_button": "Více výběrů",
-    "show_progress_bar_option": "Zobrazovat pruh postupu"
+    "show_progress_bar_option": "Zobrazovat pruh postupu",
+    "button_undo": "Zpět" 
 }

lib/l10n/arb/app_de.arb

@@ -325,5 +325,6 @@
     "sort_by_upload_speed": "Upload-Geschwindigkeit",
     "sort_by_file_size": "Dateigröße",
     "login_field_tooltip_message": "URL für Ihre Flood-Instanz (lokal, seedbox...)",
-    "sort_by_percent_completed": "Prozent abgeschlossen","show_progress_bar_option": "Fortschrittsbalken anzeigen"
+    "sort_by_percent_completed": "Prozent abgeschlossen","show_progress_bar_option": "Fortschrittsbalken anzeigen",
+    "button_undo": "Rückgängig" 
 }

lib/l10n/arb/app_en.arb

@@ -340,6 +340,7 @@
    "tag_selection_heading": "Tag Selector Preference",
    "single_selection_radio_button":"Single Selection",
    "multi_selection_radio_button":"Multi Selection",
-   "show_progress_bar_option":"Show Progress Bar"
+   "show_progress_bar_option":"Show Progress Bar",
+    "button_undo": "Undo" 
 }
 

lib/l10n/arb/app_es.arb

@@ -326,5 +326,6 @@
     "tag_selection_heading": "Preferencia del selector de etiquetas",
     "single_selection_radio_button": "Selección única",
     "multi_selection_radio_button": "Selección múltiple",
-    "show_progress_bar_option": "Mostrar barra de progreso"
+    "show_progress_bar_option": "Mostrar barra de progreso",
+    "button_undo": "Deshacer" 
 }

lib/l10n/arb/app_fi.arb

@@ -326,5 +326,6 @@
     "tag_selection_heading": "Tunnistevalitsimen asetukset",
     "single_selection_radio_button": "Yksittäinen valinta",
     "multi_selection_radio_button": "Useita valintoja",
-    "show_progress_bar_option": "Näytä edistymispalkki"
+    "show_progress_bar_option": "Näytä edistymispalkki",
+    "button_undo": "Kumoa" 
 }

lib/l10n/arb/app_fr.arb

@@ -327,5 +327,6 @@
     "tag_selection_heading": "Préférence du sélecteur de balises",
     "single_selection_radio_button": "Sélection unique",
     "multi_selection_radio_button": "Sélection multiple",
-    "show_progress_bar_option": "Afficher la barre de progression"
+    "show_progress_bar_option": "Afficher la barre de progression",
+    "button_undo": "Annuler" 
 }