Add feature to download all comics in a folder

lib/foundation/local.dart

@@ -365,10 +365,10 @@ class LocalManager with ChangeNotifier {
     return files.map((e) => "file://${e.path}").toList();
   }
 
-  Future<bool> isDownloaded(String id, ComicType type, int ep) async {
+  Future<bool> isDownloaded(String id, ComicType type, [int? ep]) async {
     var comic = find(id, type);
     if (comic == null) return false;
-    if (comic.chapters == null) return true;
+    if (comic.chapters == null || ep == null) return true;
     return comic.downloadedChapters
         .contains(comic.chapters!.keys.elementAt(ep-1));
   }

lib/network/download.dart

@@ -76,11 +76,14 @@ class ImagesDownloadTask extends DownloadTask with _TransferSpeedMixin {
   @override
   ComicType get comicType => ComicType(source.key.hashCode);
 
+  String? comicTitle;
+
   ImagesDownloadTask({
     required this.source,
     required this.comicId,
     this.comic,
     this.chapters,
+    this.comicTitle,
   });
 
   @override
@@ -379,7 +382,7 @@ class ImagesDownloadTask extends DownloadTask with _TransferSpeedMixin {
   int get speed => currentSpeed;
 
   @override
-  String get title => comic?.title ?? "Loading...";
+  String get title => comic?.title ?? comicTitle ??  "Loading...";
 
   @override
   Map<String, dynamic> toJson() {

lib/pages/favorites/favorites_page.dart

@@ -9,7 +9,9 @@ import 'package:venera/foundation/appdata.dart';
 import 'package:venera/foundation/comic_source/comic_source.dart';
 import 'package:venera/foundation/comic_type.dart';
 import 'package:venera/foundation/favorites.dart';
+import 'package:venera/foundation/local.dart';
 import 'package:venera/foundation/res.dart';
+import 'package:venera/network/download.dart';
 import 'package:venera/utils/io.dart';
 import 'package:venera/utils/translations.dart';
 

lib/pages/favorites/local_favorites_page.dart

@@ -105,7 +105,7 @@ class _LocalFavoritesPageState extends State<_LocalFavoritesPage> {
                         },
                       ).then(
                         (value) {
-                          if(mounted) {
+                          if (mounted) {
                             setState(() {});
                           }
                         },
@@ -128,13 +128,40 @@ class _LocalFavoritesPageState extends State<_LocalFavoritesPage> {
                     text: "Update Comics Info".tl,
                     onClick: () {
                       updateComicsInfo(widget.folder).then((newComics) {
-                        if(mounted) {
+                        if (mounted) {
                           setState(() {
                             comics = newComics;
                           });
                         }
                       });
                     }),
+                MenuEntry(
+                    icon: Icons.update,
+                    text: "Download All".tl,
+                    onClick: () async {
+                      int count = 0;
+                      for (var c in comics) {
+                        if (await LocalManager().isDownloaded(c.id, c.type)) {
+                          continue;
+                        }
+                        var comicSource = c.type.comicSource;
+                        if (comicSource == null) {
+                          continue;
+                        }
+                        LocalManager().addTask(ImagesDownloadTask(
+                          source: comicSource,
+                          comicId: c.id,
+                          comic: null,
+                          comicTitle: c.name,
+                        ));
+                        count++;
+                      }
+                      context.showMessage(
+                          message: "Added @count comics to download queue."
+                              .tlParams({
+                        "count": count.toString(),
+                      }));
+                    }),
               ],
             ),
           ],
@@ -219,7 +246,8 @@ class _ReorderComicsPageState extends State<_ReorderComicsPage> {
             e.author,
             e.tags,
             "${e.time} | ${comicSource?.name ?? "Unknown"}",
-            comicSource?.key ?? (e.type == ComicType.local ?  "local" : "Unknown"),
+            comicSource?.key ??
+                (e.type == ComicType.local ? "local" : "Unknown"),
             null,
             null,
           ),