local comic reading

lib/foundation/local.dart

@@ -6,6 +6,7 @@ import 'package:path_provider/path_provider.dart';
 import 'package:sqlite3/sqlite3.dart';
 import 'package:venera/foundation/comic_source/comic_source.dart';
 import 'package:venera/foundation/comic_type.dart';
+import 'package:venera/utils/io.dart';
 
 import 'app.dart';
 
@@ -137,12 +138,12 @@ class LocalManager with ChangeNotifier {
   }
 
   String findValidId(ComicType type) {
-    final res = _db.select('''
+    final res = _db.select(
+      '''
       SELECT id FROM comics WHERE comic_type = ? 
       ORDER BY CAST(id AS INTEGER) DESC
       LIMIT 1;
-      '''
+      '''[type.value],
-      [type.value],
     );
     if (res.isEmpty) {
       return '1';
@@ -229,4 +230,40 @@ class LocalManager with ChangeNotifier {
     }
     return LocalComic.fromRow(res.first);
   }
+
+  Future<List<String>> getImages(String id, ComicType type, int ep) async {
+    var comic = find(id, type) ?? (throw "Comic Not Found");
+    var directory = Directory(FilePath.join(path, comic.directory));
+    if (comic.chapters != null) {
+      var cid = comic.chapters!.keys.elementAt(ep - 1);
+      directory = Directory(FilePath.join(directory.path, cid));
+    }
+    var files = <File>[];
+    await for (var entity in directory.list()) {
+      if (entity is File) {
+        if (entity.absolute.path.replaceFirst(path, '').substring(1) ==
+            comic.cover) {
+          continue;
+        }
+        files.add(entity);
+      }
+    }
+    files.sort((a, b) {
+      var ai = int.tryParse(a.name.split('.').first);
+      var bi = int.tryParse(b.name.split('.').first);
+      if(ai != null && bi != null) {
+        return ai.compareTo(bi);
+      }
+      return a.name.compareTo(b.name);
+    });
+    return files.map((e) => "file://${e.path}").toList();
+  }
+
+  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;
+    var eid = comic.chapters!.keys.elementAt(ep);
+    return Directory(FilePath.join(path, comic.directory, eid)).exists();
+  }
 }

lib/pages/comic_page.dart

@@ -462,7 +462,7 @@ abstract mixin class _ComicPageActions {
   void read([int? ep, int? page]) {
     App.rootContext.to(
       () => Reader(
-        source: comicSource,
+        type: comic.comicType,
         cid: comic.id,
         name: comic.title,
         chapters: comic.chapters,

lib/pages/reader/images.dart

@@ -21,7 +21,26 @@ class _ReaderImagesState extends State<_ReaderImages> {
   void load() async {
     if (inProgress) return;
     inProgress = true;
-    var res = await context.reader.widget.source.loadComicPages!(
+    if (context.reader.type == ComicType.local ||
+        (await LocalManager().isDownloaded(
+            context.reader.cid, context.reader.type, context.reader.chapter))) {
+      try {
+        var images = await LocalManager().getImages(
+            context.reader.cid, context.reader.type, context.reader.chapter);
+        setState(() {
+          context.reader.images = images;
+          context.reader.isLoading = false;
+          inProgress = false;
+        });
+      } catch (e) {
+        setState(() {
+          error = e.toString();
+          context.reader.isLoading = false;
+          inProgress = false;
+        });
+      }
+    } else {
+      var res = await context.reader.type.comicSource!.loadComicPages!(
         context.reader.widget.cid,
         context.reader.widget.chapters?.keys
             .elementAt(context.reader.chapter - 1),
@@ -39,6 +58,7 @@ class _ReaderImagesState extends State<_ReaderImages> {
           inProgress = false;
         });
       }
+    }
     context.readerScaffold.update();
   }
 
@@ -196,13 +216,18 @@ class _GalleryModeState extends State<_GalleryMode>
 }
 
 ImageProvider _createImageProvider(int page, BuildContext context) {
+  var imageKey = context.reader.images![page-1];
+  if(imageKey.startsWith('file://')) {
+    return FileImage(File(imageKey.replaceFirst("file://", '')));
+  } else {
     return ReaderImageProvider(
-    context.reader.images![page - 1],
+      imageKey,
-    context.reader.widget.source.key,
+      context.reader.type.comicSource!.key,
       context.reader.cid,
       context.reader.eid,
     );
   }
+}
 
 void _precacheImage(int page, BuildContext context) {
   precacheImage(

lib/pages/reader/reader.dart

@@ -10,9 +10,11 @@ import 'package:photo_view/photo_view_gallery.dart';
 import 'package:venera/components/components.dart';
 import 'package:venera/foundation/app.dart';
 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/history.dart';
 import 'package:venera/foundation/image_provider/reader_image.dart';
+import 'package:venera/foundation/local.dart';
+import 'package:venera/utils/io.dart';
 import 'package:venera/utils/translations.dart';
 import 'package:window_manager/window_manager.dart';
 
@@ -32,7 +34,7 @@ extension _ReaderContext on BuildContext {
 class Reader extends StatefulWidget {
   const Reader({
     super.key,
-    required this.source,
+    required this.type,
     required this.cid,
     required this.name,
     required this.chapters,
@@ -41,7 +43,7 @@ class Reader extends StatefulWidget {
     this.initialChapter,
   });
 
-  final ComicSource source;
+  final ComicType type;
 
   final String cid;
 
@@ -72,6 +74,8 @@ class _ReaderState extends State<Reader> with _ReaderLocation, _ReaderWindow {
   @override
   int get maxPage => images?.length ?? 1;
 
+  ComicType get type => widget.type;
+
   String get cid => widget.cid;
 
   String get eid => widget.chapters?.keys.elementAt(chapter - 1) ?? '0';