add option to download online subtitles

- button appears for downloaded and local entries
- added app logging class

lib/l10n/app_en.arb

@@ -145,6 +145,7 @@
   "check_for_update": "Check for update",
   "share_app_logs": "Share app logs",
   "no_app_logs": "No log.txt available!",
+  "failed": "Failed!",
   "n_days_ago": "{days} days ago",
   "today": "Today",
   "yesterday": "Yesterday",

lib/l10n/generated/app_localizations.dart

@@ -945,6 +945,12 @@ abstract class AppLocalizations {
   /// **'No log.txt available!'**
   String get no_app_logs;
 
+  /// No description provided for @failed.
+  ///
+  /// In en, this message translates to:
+  /// **'Failed!'**
+  String get failed;
+
   /// No description provided for @n_days_ago.
   ///
   /// In en, this message translates to:

lib/l10n/generated/app_localizations_ar.dart

@@ -440,6 +440,9 @@ class AppLocalizationsAr extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return 'منذ $days أيام';

lib/l10n/generated/app_localizations_as.dart

@@ -442,6 +442,9 @@ class AppLocalizationsAs extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return '$days দিনৰ আগতে';

lib/l10n/generated/app_localizations_de.dart

@@ -444,6 +444,9 @@ class AppLocalizationsDe extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return 'Vor $days Tagen';

lib/l10n/generated/app_localizations_en.dart

@@ -442,6 +442,9 @@ class AppLocalizationsEn extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return '$days days ago';

lib/l10n/generated/app_localizations_es.dart

@@ -446,6 +446,9 @@ class AppLocalizationsEs extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return 'hace $days días';

lib/l10n/generated/app_localizations_fr.dart

@@ -448,6 +448,9 @@ class AppLocalizationsFr extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return 'Il y a $days jours';

lib/l10n/generated/app_localizations_hi.dart

@@ -442,6 +442,9 @@ class AppLocalizationsHi extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return '$days दिन पहले';

lib/l10n/generated/app_localizations_id.dart

@@ -446,6 +446,9 @@ class AppLocalizationsId extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return '$days Hari yang Lalu';

lib/l10n/generated/app_localizations_it.dart

@@ -446,6 +446,9 @@ class AppLocalizationsIt extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return '$days giorni fa';

lib/l10n/generated/app_localizations_pt.dart

@@ -446,6 +446,9 @@ class AppLocalizationsPt extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return '$days dias atrás';

lib/l10n/generated/app_localizations_ru.dart

@@ -447,6 +447,9 @@ class AppLocalizationsRu extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return '$days дней назад';

lib/l10n/generated/app_localizations_th.dart

@@ -442,6 +442,9 @@ class AppLocalizationsTh extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return '$days วันที่แล้ว';

lib/l10n/generated/app_localizations_tr.dart

@@ -442,6 +442,9 @@ class AppLocalizationsTr extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return '$days gün önce';

lib/l10n/generated/app_localizations_zh.dart

@@ -434,6 +434,9 @@ class AppLocalizationsZh extends AppLocalizations {
   @override
   String get no_app_logs => 'No log.txt available!';
 
+  @override
+  String get failed => 'Failed!';
+
   @override
   String n_days_ago(Object days) {
     return '$days天前';

lib/modules/anime/anime_player_view.dart

@@ -1355,6 +1355,7 @@ mp.register_script_message('call_button_${button.id}_long', button${button.id}lo
                     await subtitlesSearchraggableMenu(
                           context,
                           chapter: widget.episode,
+                          isLocal: widget.isLocal,
                         )
                         as ImdbSubtitle?;
                 if (subtitle != null && context.mounted) {

lib/modules/anime/widgets/search_subtitles.dart

@@ -2,17 +2,30 @@ import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:mangayomi/eval/model/m_bridge.dart';
 import 'package:mangayomi/models/chapter.dart';
 import 'package:mangayomi/modules/widgets/custom_extended_image_provider.dart';
 import 'package:mangayomi/modules/widgets/error_text.dart';
 import 'package:mangayomi/modules/widgets/progress_center.dart';
+import 'package:mangayomi/providers/l10n_providers.dart';
+import 'package:mangayomi/providers/storage_provider.dart';
 import 'package:mangayomi/services/fetch_subtitles.dart';
+import 'package:mangayomi/services/http/m_client.dart';
+import 'package:mangayomi/services/http/rhttp/src/model/settings.dart';
 import 'package:mangayomi/utils/extensions/build_context_extensions.dart';
+import 'package:mangayomi/utils/extensions/string_extensions.dart';
+import 'package:mangayomi/utils/log/logger.dart';
+import 'package:path/path.dart' as path;
 import 'package:super_sliver_list/super_sliver_list.dart';
 
 class SubtitlesWidgetSearch extends ConsumerStatefulWidget {
   final Chapter chapter;
-  const SubtitlesWidgetSearch({required this.chapter, super.key});
+  final bool isLocal;
+  const SubtitlesWidgetSearch({
+    required this.chapter,
+    required this.isLocal,
+    super.key,
+  });
 
   @override
   ConsumerState<SubtitlesWidgetSearch> createState() =>
@@ -296,6 +309,12 @@ class _SubtitlesWidgetSearchState extends ConsumerState<SubtitlesWidgetSearch> {
                           ),
                       ],
                     ),
+                    if (isSubtitles && widget.isLocal)
+                      OutlinedButton.icon(
+                        onPressed: () async => _downloadSubtitle(index),
+                        label: Text(context.l10n.download),
+                        icon: Icon(Icons.download_outlined),
+                      ),
                   ],
                 ),
               ],
@@ -308,11 +327,71 @@ class _SubtitlesWidgetSearchState extends ConsumerState<SubtitlesWidgetSearch> {
       },
     );
   }
+
+  Future<void> _downloadSubtitle(int index) async {
+    botToast(context.l10n.started);
+    try {
+      final subtitle = subtitles![index];
+      final storageProvider = StorageProvider();
+      final chapterDirectory = (await storageProvider.getMangaChapterDirectory(
+        widget.chapter,
+      ))!;
+      final subtitleFile = File(
+        path.join(
+          '${chapterDirectory.path}_subtitles',
+          '${subtitle.language}.srt',
+        ),
+      );
+      final client = MClient.httpClient(
+        settings: const ClientSettings(
+          throwOnStatusCode: false,
+          tlsSettings: TlsSettings(verifyCertificates: false),
+        ),
+      );
+      await subtitleFile.create(recursive: true);
+      final response = await _withRetry(
+        () => client.get(Uri.parse(subtitle.url ?? '')),
+      );
+      if (response.statusCode != 200) {
+        AppLogger.log(
+          'Warning: Failed to download subtitle file: ${subtitle.language}',
+        );
+        return;
+      }
+      AppLogger.log('Subtitle file downloaded: ${subtitle.language}');
+      await subtitleFile.writeAsBytes(response.bodyBytes);
+      if (context.mounted) {
+        botToast(context.l10n.finished(""));
+      }
+    } catch (e) {
+      AppLogger.log("Failed to download subtitle:", logLevel: LogLevel.error);
+      AppLogger.log(e.toString(), logLevel: LogLevel.error);
+      if (context.mounted) {
+        botToast(context.l10n.failed);
+      }
+      rethrow;
+    }
+  }
+
+  Future<T> _withRetry<T>(Future<T> Function() operation) async {
+    int attempts = 0;
+    while (true) {
+      try {
+        attempts++;
+        return await operation();
+      } catch (e) {
+        if (attempts >= 3) {
+          AppLogger.log("Request retries failed", logLevel: LogLevel.error);
+        }
+      }
+    }
+  }
 }
 
 subtitlesSearchraggableMenu(
   BuildContext context, {
   required Chapter chapter,
+  required bool isLocal,
 }) async {
   var padding = MediaQuery.of(context).padding;
   return await showDialog(
@@ -352,7 +431,7 @@ subtitlesSearchraggableMenu(
                   ],
                 ),
               ),
-              SubtitlesWidgetSearch(chapter: chapter),
+              SubtitlesWidgetSearch(chapter: chapter, isLocal: isLocal),
             ],
           ),
         ),