Feat: Image favorites (#126)

* feat: 增加图片收藏

* feat: 主体图片收藏页面实现

* feat: 点击打开大图浏览

* feat: 数据结构变更

* feat: 基本完成

* feat: 翻译与bug修复

* feat: 实机测试和问题修复

* feat: jm导入, pica历史记录nhentai有问题, 一键反转

* fix: 大小写不一致, 一个htManga, 一个htmanga

* feat: 拉取收藏优化

* feat: 改成以ep为准

* feat: 兜底一些可能报错场景

* chore: 没有用到

* feat: 尽量保证和网络收藏顺序一致

* feat: 支持显示热点tag

* feat: 支持双击收藏, 不过此时禁止放大图片

* fix: 自动塞封面逻辑完善, 切换快速收藏图片立刻生效

* Refactor

* fix updateValue

* feat: 双击功能提示

* fix: 被确定取消收藏的才删除

* Refactor ImageFavoritesPage

* translate author

* feat: 功能提示改到dialog中

* fix text editing

* fix text editing

* feat: 功能提示放到邮件或长按菜单中

* fix: 修复tag过滤不生效问题

* Improve image loading

* The default value of quickCollectImage should be false.

* Refactor DragListener

* Refactor ImageFavoriteItem & ImageFavoritePhotoView

* Refactor

* Fix `ImageFavoriteManager.has`

* Fix UI

* Improve UI

---------

Co-authored-by: nyne <me@nyne.dev>

lib/foundation/appdata.dart

@@ -143,6 +143,7 @@ class _Settings with ChangeNotifier {
     'quickFavorite': null,
     'enableTurnPageByVolumeKey': true,
     'enableClockAndBatteryInfoInReader': true,
+    'quickCollectImage': 'No', // No, DoubleTap, Swipe
     'authorizationRequired': false,
     'onClickFavorite': 'viewDetail', // viewDetail, read
     'enableDnsOverrides': false,
@@ -179,4 +180,4 @@ const _defaultCustomImageProcessing = '''
 async function processImage(image, cid, eid) {
     return image;
 }
-''';
+''';

lib/foundation/comic_source/favorites.dart

@@ -10,6 +10,10 @@ class FavoriteData {
 
   final bool multiFolder;
 
+  // 这个收藏时间新旧顺序, 是为了最小成本同步远端的收藏, 只拉取远程最新收藏的漫画, 就不需要全拉取一遍了
+  // 如果为 null, 当做从新到旧
+  final bool? isOldToNewSort;
+
   final Future<Res<List<Comic>>> Function(int page, [String? folder])?
       loadComic;
 
@@ -44,6 +48,7 @@ class FavoriteData {
     this.addFolder,
     this.allFavoritesId,
     this.addOrDelFavorite,
+    this.isOldToNewSort,
   });
 }
 

lib/foundation/comic_source/models.dart

@@ -73,7 +73,8 @@ class Comic {
     this.sourceKey,
     this.maxPage,
     this.language,
-  ): favoriteId = null, stars = null;
+  )   : favoriteId = null,
+        stars = null;
 
   Map<String, dynamic> toJson() {
     return {
@@ -231,6 +232,34 @@ class ComicDetails with HistoryMixin {
   String get id => comicId;
 
   ComicType get comicType => ComicType(sourceKey.hashCode);
+
+  /// Convert tags map to plain list
+  List<String> get plainTags {
+    var res = <String>[];
+    tags.forEach((key, value) {
+      res.addAll(value.map((e) => "$key:$e"));
+    });
+    return res;
+  }
+
+  /// Find the first author tag
+  String? findAuthor() {
+    var authorNamespaces = [
+      "author",
+      "authors",
+      "artist",
+      "artists",
+      "作者",
+      "画师"
+    ];
+    for (var entry in tags.entries) {
+      if (authorNamespaces.contains(entry.key.toLowerCase()) &&
+          entry.value.isNotEmpty) {
+        return entry.value.first;
+      }
+    }
+    return null;
+  }
 }
 
 class ArchiveInfo {
@@ -242,4 +271,4 @@ class ArchiveInfo {
       : title = json["title"],
         description = json["description"],
         id = json["id"];
-}
+}

lib/foundation/comic_source/parser.dart

@@ -193,7 +193,7 @@ class ComicSourceParser {
       login = (account, pwd) async {
         try {
           await JsEngine().runCode("""
-          ComicSource.sources.$_key.account.login(${jsonEncode(account)}, 
+          ComicSource.sources.$_key.account.login(${jsonEncode(account)},
           ${jsonEncode(pwd)})
         """);
           var source = ComicSource.find(_key!)!;
@@ -502,9 +502,9 @@ class ComicSourceParser {
       try {
         var res = await JsEngine().runCode("""
           ComicSource.sources.$_key.categoryComics.load(
-            ${jsonEncode(category)}, 
-            ${jsonEncode(param)}, 
-            ${jsonEncode(options)}, 
+            ${jsonEncode(category)},
+            ${jsonEncode(param)},
+            ${jsonEncode(options)},
             ${jsonEncode(page)}
           )
         """);
@@ -618,6 +618,7 @@ class ComicSourceParser {
     if (!_checkExists("favorites")) return null;
 
     final bool multiFolder = _getValue("favorites.multiFolder");
+    final bool? isOldToNewSort = _getValue("favorites.isOldToNewSort");
 
     Future<Res<T>> retryZone<T>(Future<Res<T>> Function() func) async {
       if (!ComicSource.find(_key!)!.isLogged) {
@@ -770,6 +771,7 @@ class ComicSourceParser {
       addFolder: addFolder,
       deleteFolder: deleteFolder,
       addOrDelFavorite: addOrDelFavFunc,
+      isOldToNewSort: isOldToNewSort,
     );
   }
 

lib/foundation/consts.dart

@@ -1,6 +1,17 @@
+/// If window width is less than this value, it is considered as mobile.
 const changePoint = 600;
 
+/// If window width is less than this value, it is considered as tablet.
+///
+/// If it is more than this value, it is considered as desktop.
 const changePoint2 = 1300;
 
+/// Default user agent for http requests.
 const webUA =
-    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36";
+    "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36";
+
+/// Pages for all comics is started from this value.
+const firstPage = 1;
+
+/// Chapters for all comics is started from this value.
+const firstChapter = 1;

lib/foundation/context.dart

@@ -36,6 +36,8 @@ extension Navigation on BuildContext {
 
   Brightness get brightness => Theme.of(this).brightness;
 
+  bool get isDarkMode => brightness == Brightness.dark;
+
   void showMessage({required String message}) {
     showToast(message: message, context: this);
   }

lib/foundation/history.dart

@@ -1,12 +1,23 @@
 import 'dart:async';
+import 'dart:convert';
+import 'dart:isolate';
+import 'dart:math';
 
+import 'package:flutter/foundation.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart' show ChangeNotifier;
 import 'package:sqlite3/sqlite3.dart';
 import 'package:venera/foundation/comic_source/comic_source.dart';
 import 'package:venera/foundation/comic_type.dart';
+import 'package:venera/foundation/image_provider/image_favorites_provider.dart';
+import 'package:venera/foundation/log.dart';
+import 'package:venera/utils/ext.dart';
 import 'package:venera/utils/translations.dart';
 
 import 'app.dart';
+import 'consts.dart';
+
+part "image_favorites.dart";
 
 typedef HistoryType = ComicType;
 
@@ -37,7 +48,7 @@ class History implements Comic {
 
   @override
   String cover;
-  
+
   int ep;
 
   int page;
@@ -201,7 +212,12 @@ class HistoryManager with ChangeNotifier {
 
   Map<String, bool>? _cachedHistory;
 
+  bool isInitialized = false;
+
   Future<void> init() async {
+    if (isInitialized) {
+      return;
+    }
     _db = sqlite3.open("${App.dataPath}/history.db");
 
     _db.execute("""
@@ -220,6 +236,8 @@ class HistoryManager with ChangeNotifier {
       """);
 
     notifyListeners();
+    ImageFavoriteManager().init();
+    isInitialized = true;
   }
 
   /// add history. if exists, update time.
@@ -275,7 +293,7 @@ class HistoryManager with ChangeNotifier {
   }
 
   History? findSync(String id, ComicType type) {
-    if(_cachedHistory == null) {
+    if (_cachedHistory == null) {
       updateCache();
     }
     if (!_cachedHistory!.containsKey(id)) {

lib/foundation/image_favorites.dart

@@ -0,0 +1,535 @@
+part of "history.dart";
+
+class ImageFavorite {
+  final String eid;
+  final String id; // 漫画id
+  final int ep;
+  final String epName;
+  final String sourceKey;
+  String imageKey;
+  int page;
+  bool? isAutoFavorite;
+
+  ImageFavorite(
+    this.page,
+    this.imageKey,
+    this.isAutoFavorite,
+    this.eid,
+    this.id,
+    this.ep,
+    this.sourceKey,
+    this.epName,
+  );
+
+  Map<String, dynamic> toJson() {
+    return {
+      'page': page,
+      'imageKey': imageKey,
+      'isAutoFavorite': isAutoFavorite,
+      'eid': eid,
+      'id': id,
+      'ep': ep,
+      'sourceKey': sourceKey,
+      'epName': epName,
+    };
+  }
+
+  ImageFavorite.fromJson(Map<String, dynamic> json)
+      : page = json['page'],
+        imageKey = json['imageKey'],
+        isAutoFavorite = json['isAutoFavorite'],
+        eid = json['eid'],
+        id = json['id'],
+        ep = json['ep'],
+        sourceKey = json['sourceKey'],
+        epName = json['epName'];
+
+  ImageFavorite copyWith({
+    int? page,
+    String? imageKey,
+    bool? isAutoFavorite,
+    String? eid,
+    String? id,
+    int? ep,
+    String? sourceKey,
+    String? epName,
+  }) {
+    return ImageFavorite(
+      page ?? this.page,
+      imageKey ?? this.imageKey,
+      isAutoFavorite ?? this.isAutoFavorite,
+      eid ?? this.eid,
+      id ?? this.id,
+      ep ?? this.ep,
+      sourceKey ?? this.sourceKey,
+      epName ?? this.epName,
+    );
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return other is ImageFavorite &&
+        other.id == id &&
+        other.sourceKey == sourceKey &&
+        other.page == page &&
+        other.eid == eid &&
+        other.ep == ep;
+  }
+
+  @override
+  int get hashCode => Object.hash(id, sourceKey, page, eid, ep);
+}
+
+class ImageFavoritesEp {
+  // 小心拷贝等多章节的可能更新章节顺序
+  String eid;
+  final int ep;
+  int maxPage;
+  String epName;
+  List<ImageFavorite> imageFavorites;
+
+  ImageFavoritesEp(
+      this.eid, this.ep, this.imageFavorites, this.epName, this.maxPage);
+
+  // 是否有封面
+  bool get isHasFirstPage {
+    return imageFavorites[0].page == firstPage;
+  }
+
+  // 是否都有imageKey
+  bool get isHasImageKey {
+    return imageFavorites.every((e) => e.imageKey != "");
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'eid': eid,
+      'ep': ep,
+      'maxPage': maxPage,
+      'epName': epName,
+      'imageFavorites': imageFavorites.map((e) => e.toJson()).toList(),
+    };
+  }
+}
+
+class ImageFavoritesComic {
+  final String id;
+  final String title;
+  String subTitle;
+  String author;
+  final String sourceKey;
+
+  // 不一定是真的这本漫画的所有页数, 如果是多章节的时候
+  int maxPage;
+  List<String> tags;
+  List<String> translatedTags;
+  final DateTime time;
+  List<ImageFavoritesEp> imageFavoritesEp;
+  final Map<String, dynamic> other;
+
+  ImageFavoritesComic(
+    this.id,
+    this.imageFavoritesEp,
+    this.title,
+    this.sourceKey,
+    this.tags,
+    this.translatedTags,
+    this.time,
+    this.author,
+    this.other,
+    this.subTitle,
+    this.maxPage,
+  );
+
+  // 是否都有imageKey
+  bool get isAllHasImageKey {
+    return imageFavoritesEp
+        .every((e) => e.imageFavorites.every((j) => j.imageKey != ""));
+  }
+
+  int get maxPageFromEp {
+    int temp = 0;
+    for (var e in imageFavoritesEp) {
+      temp += e.maxPage;
+    }
+    return temp;
+  }
+
+  // 是否都有封面
+  bool get isAllHasFirstPage {
+    return imageFavoritesEp.every((e) => e.isHasFirstPage);
+  }
+
+  Iterable<ImageFavorite> get images sync*{
+    for (var e in imageFavoritesEp) {
+      yield* e.imageFavorites;
+    }
+  }
+
+  @override
+  bool operator ==(Object other) {
+    return other is ImageFavoritesComic &&
+        other.id == id &&
+        other.sourceKey == sourceKey;
+  }
+
+  @override
+  int get hashCode => Object.hash(id, sourceKey);
+
+  factory ImageFavoritesComic.fromRow(Row r) {
+    var tempImageFavoritesEp = jsonDecode(r["image_favorites_ep"]);
+    List<ImageFavoritesEp> finalImageFavoritesEp = [];
+    tempImageFavoritesEp.forEach((i) {
+      List<ImageFavorite> temp = [];
+      i["imageFavorites"].forEach((j) {
+        temp.add(ImageFavorite(
+          j["page"],
+          j["imageKey"],
+          j["isAutoFavorite"],
+          i["eid"],
+          r["id"],
+          i["ep"],
+          r["source_key"],
+          i["epName"],
+        ));
+      });
+      finalImageFavoritesEp.add(ImageFavoritesEp(
+          i["eid"], i["ep"], temp, i["epName"], i["maxPage"] ?? 1));
+    });
+    return ImageFavoritesComic(
+      r["id"],
+      finalImageFavoritesEp,
+      r["title"],
+      r["source_key"],
+      r["tags"].split(","),
+      r["translated_tags"].split(","),
+      DateTime.fromMillisecondsSinceEpoch(r["time"]),
+      r["author"],
+      jsonDecode(r["other"]),
+      r["sub_title"],
+      r["max_page"],
+    );
+  }
+}
+
+class ImageFavoriteManager with ChangeNotifier {
+  Database get _db => HistoryManager()._db;
+
+  List<ImageFavoritesComic> get comics => getAll();
+
+  static ImageFavoriteManager? _cache;
+
+  ImageFavoriteManager._();
+
+  factory ImageFavoriteManager() => (_cache ??= ImageFavoriteManager._());
+
+  /// 检查表image_favorites是否存在, 不存在则创建
+  void init() {
+    _db.execute("CREATE TABLE IF NOT EXISTS image_favorites ("
+        "id TEXT,"
+        "title TEXT NOT NULL,"
+        "sub_title TEXT,"
+        "author TEXT,"
+        "tags TEXT,"
+        "translated_tags TEXT,"
+        "time int,"
+        "max_page int,"
+        "source_key TEXT NOT NULL,"
+        "image_favorites_ep TEXT NOT NULL,"
+        "other TEXT NOT NULL,"
+        "PRIMARY KEY (id,source_key)"
+        ");");
+  }
+
+  // 做排序和去重的操作
+  void addOrUpdateOrDelete(ImageFavoritesComic favorite, [bool notify = true]) {
+    // 没有章节了就删掉
+    if (favorite.imageFavoritesEp.isEmpty) {
+      _db.execute("""
+      delete from image_favorites
+      where id == ? and source_key == ?;
+    """, [favorite.id, favorite.sourceKey]);
+    } else {
+      // 去重章节
+      List<ImageFavoritesEp> tempImageFavoritesEp = [];
+      for (var e in favorite.imageFavoritesEp) {
+        int index = tempImageFavoritesEp.indexWhere((i) {
+          return i.ep == e.ep;
+        });
+        // 再做一层保险, 防止出现ep为0的脏数据
+        if (index == -1 && e.ep > 0) {
+          tempImageFavoritesEp.add(e);
+        }
+      }
+      tempImageFavoritesEp.sort((a, b) => a.ep.compareTo(b.ep));
+      List<dynamic> finalImageFavoritesEp =
+          jsonDecode(jsonEncode(tempImageFavoritesEp));
+      for (var e in tempImageFavoritesEp) {
+        List<Map> finalImageFavorites = [];
+        int epIndex = tempImageFavoritesEp.indexOf(e);
+        for (ImageFavorite j in e.imageFavorites) {
+          int index =
+              finalImageFavorites.indexWhere((i) => i["page"] == j.page);
+          if (index == -1 && j.page > 0) {
+            // isAutoFavorite 为 null 不写入数据库, 同时只保留需要的属性, 避免增加太多重复字段在数据库里
+            if (j.isAutoFavorite != null) {
+              finalImageFavorites.add({
+                "page": j.page,
+                "imageKey": j.imageKey,
+                "isAutoFavorite": j.isAutoFavorite
+              });
+            } else {
+              finalImageFavorites.add({"page": j.page, "imageKey": j.imageKey});
+            }
+          }
+        }
+        finalImageFavorites.sort((a, b) => a["page"].compareTo(b["page"]));
+        finalImageFavoritesEp[epIndex]["imageFavorites"] = finalImageFavorites;
+      }
+      if (tempImageFavoritesEp.isEmpty) {
+        throw "Error: No ImageFavoritesEp";
+      }
+      _db.execute("""
+      insert or replace into image_favorites(id, title, sub_title, author, tags, translated_tags, time, max_page, source_key, image_favorites_ep, other)
+      values(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?);
+    """, [
+        favorite.id,
+        favorite.title,
+        favorite.subTitle,
+        favorite.author,
+        favorite.tags.join(","),
+        favorite.translatedTags.join(","),
+        favorite.time.millisecondsSinceEpoch,
+        favorite.maxPage,
+        favorite.sourceKey,
+        jsonEncode(finalImageFavoritesEp),
+        jsonEncode(favorite.other)
+      ]);
+    }
+    if (notify) {
+      notifyListeners();
+    }
+  }
+
+  bool has(String id, String sourceKey, String eid, int page, int ep) {
+    var comic = find(id, sourceKey);
+    if (comic == null) {
+      return false;
+    }
+    var epIndex = comic.imageFavoritesEp.where((e) => e.eid == eid).firstOrNull;
+    if (epIndex == null) {
+      return false;
+    }
+    return epIndex.imageFavorites.any((e) => e.page == page && e.ep == ep);
+  }
+
+  List<ImageFavoritesComic> getAll([String? keyword]) {
+    ResultSet res;
+    if (keyword == null || keyword == "") {
+      res = _db.select("select * from image_favorites;");
+    } else {
+      res = _db.select(
+        """
+    select * from image_favorites
+    WHERE title LIKE ?
+    OR sub_title LIKE ?
+    OR LOWER(tags) LIKE LOWER(?)
+    OR LOWER(translated_tags) LIKE LOWER(?)
+    OR author LIKE ?;
+    """,
+        ['%$keyword%', '%$keyword%', '%$keyword%', '%$keyword%', '%$keyword%'],
+      );
+    }
+    try {
+      return res.map((e) => ImageFavoritesComic.fromRow(e)).toList();
+    } catch (e, stackTrace) {
+      Log.error("Unhandled Exception", e.toString(), stackTrace);
+      return [];
+    }
+  }
+
+  void deleteImageFavorite(Iterable<ImageFavorite> imageFavoriteList) {
+    if (imageFavoriteList.isEmpty) {
+      return;
+    }
+    for (var i in imageFavoriteList) {
+      ImageFavoritesProvider.deleteFromCache(i);
+    }
+    var comics = <ImageFavoritesComic>{};
+    for (var i in imageFavoriteList) {
+      var comic = comics
+              .where((c) => c.id == i.id && c.sourceKey == i.sourceKey)
+              .firstOrNull ??
+          find(i.id, i.sourceKey);
+      if (comic == null) {
+        continue;
+      }
+      var ep = comic.imageFavoritesEp.firstWhereOrNull((e) => e.ep == i.ep);
+      if (ep == null) {
+        continue;
+      }
+      ep.imageFavorites.remove(i);
+      if (ep.imageFavorites.isEmpty) {
+        comic.imageFavoritesEp.remove(ep);
+      }
+      comics.add(comic);
+    }
+    for (var i in comics) {
+      addOrUpdateOrDelete(i, false);
+    }
+    notifyListeners();
+  }
+
+  int get length {
+    var res = _db.select("select count(*) from image_favorites;");
+    return res.first.values.first! as int;
+  }
+
+  List<ImageFavoritesComic> search(String keyword) {
+    if (keyword == "") {
+      return [];
+    }
+    return getAll(keyword);
+  }
+
+  static Future<ImageFavoritesComputed> computeImageFavorites() {
+    var token = ServicesBinding.rootIsolateToken!;
+    var count = ImageFavoriteManager().length;
+    if (count == 0) {
+      return Future.value(ImageFavoritesComputed([], [], []));
+    } else if (count > 100) {
+      return Isolate.run(() async {
+        BackgroundIsolateBinaryMessenger.ensureInitialized(token);
+        await App.init();
+        await HistoryManager().init();
+        return _computeImageFavorites();
+      });
+    } else {
+      return Future.value(_computeImageFavorites());
+    }
+  }
+
+  static ImageFavoritesComputed _computeImageFavorites() {
+    const maxLength = 20;
+
+    var comics = ImageFavoriteManager().getAll();
+    // 去掉这些没有意义的标签
+    const List<String> exceptTags = [
+      '連載中',
+      '',
+      'translated',
+      'chinese',
+      'sole male',
+      'sole female',
+      'original',
+      'doujinshi',
+      'manga',
+      'multi-work series',
+      'mosaic censorship',
+      'dilf',
+      'bbm',
+      'uncensored',
+      'full censorship'
+    ];
+
+    Map<String, int> tagCount = {};
+    Map<String, int> authorCount = {};
+    Map<ImageFavoritesComic, int> comicImageCount = {};
+    Map<ImageFavoritesComic, int> comicMaxPages = {};
+
+    for (var comic in comics) {
+      for (var tag in comic.tags) {
+        String finalTag = tag;
+        tagCount[finalTag] = (tagCount[finalTag] ?? 0) + 1;
+      }
+
+      if (comic.author != "") {
+        String finalAuthor = comic.author;
+        authorCount[finalAuthor] =
+            (authorCount[finalAuthor] ?? 0) + comic.images.length;
+      }
+      // 小于10页的漫画不统计
+      if (comic.maxPageFromEp < 10) {
+        continue;
+      }
+      comicImageCount[comic] =
+          (comicImageCount[comic] ?? 0) + comic.images.length;
+      comicMaxPages[comic] = (comicMaxPages[comic] ?? 0) + comic.maxPageFromEp;
+    }
+
+    // 按数量排序标签
+    List<String> sortedTags = tagCount.keys.toList()
+      ..sort((a, b) => tagCount[b]!.compareTo(tagCount[a]!));
+
+    // 按数量排序作者
+    List<String> sortedAuthors = authorCount.keys.toList()
+      ..sort((a, b) => authorCount[b]!.compareTo(authorCount[a]!));
+
+    // 按收藏数量排序漫画
+    List<MapEntry<ImageFavoritesComic, int>> sortedComicsByNum =
+        comicImageCount.entries.toList()
+          ..sort((a, b) => b.value.compareTo(a.value));
+
+    validateTag(String tag) {
+      if (tag.startsWith("Category:")) {
+        return false;
+      }
+      return !exceptTags.contains(tag.split(":").last.toLowerCase()) &&
+          !tag.isNum;
+    }
+
+    return ImageFavoritesComputed(
+      sortedTags
+          .where(validateTag)
+          .map((tag) => TextWithCount(tag, tagCount[tag]!))
+          .take(maxLength)
+          .toList(),
+      sortedAuthors
+          .map((author) => TextWithCount(author, authorCount[author]!))
+          .take(maxLength)
+          .toList(),
+      sortedComicsByNum
+          .map((comic) => TextWithCount(comic.key.title, comic.value))
+          .take(maxLength)
+          .toList(),
+    );
+  }
+
+  ImageFavoritesComic? find(String id, String sourceKey) {
+    var row = _db.select("""
+    select * from image_favorites
+    where id == ? and source_key == ?;
+    """, [id, sourceKey]);
+    if (row.isEmpty) {
+      return null;
+    }
+    return ImageFavoritesComic.fromRow(row.first);
+  }
+}
+
+class TextWithCount {
+  final String text;
+  final int count;
+
+  const TextWithCount(this.text, this.count);
+}
+
+class ImageFavoritesComputed {
+  /// 基于收藏的标签数排序
+  final List<TextWithCount> tags;
+
+  /// 基于收藏的作者数排序
+  final List<TextWithCount> authors;
+
+  /// 基于喜欢的图片数排序
+  final List<TextWithCount> comics;
+
+  /// 计算后的图片收藏数据
+  const ImageFavoritesComputed(
+    this.tags,
+    this.authors,
+    this.comics,
+  );
+
+  bool get isEmpty => tags.isEmpty && authors.isEmpty && comics.isEmpty;
+}

lib/foundation/image_provider/base_image_provider.dart

@@ -6,6 +6,7 @@ import 'dart:ui';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:venera/foundation/cache_manager.dart';
+import 'package:venera/foundation/log.dart';
 
 abstract class BaseImageProvider<T extends BaseImageProvider<T>>
     extends ImageProvider<T> {
@@ -126,10 +127,11 @@ abstract class BaseImageProvider<T extends BaseImageProvider<T>>
         }
         rethrow;
       }
-    } catch (e) {
+    } catch (e, s) {
       scheduleMicrotask(() {
         PaintingBinding.instance.imageCache.evict(key);
       });
+      Log.error("Image Loading", e, s);
       rethrow;
     } finally {
       chunkEvents.close();

lib/foundation/image_provider/image_favorites_provider.dart

@@ -0,0 +1,146 @@
+import 'dart:async' show Future, StreamController;
+import 'dart:io';
+import 'package:crypto/crypto.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:venera/foundation/app.dart';
+import 'package:venera/foundation/comic_source/comic_source.dart';
+import 'package:venera/foundation/comic_type.dart';
+import 'package:venera/foundation/local.dart';
+import 'package:venera/network/images.dart';
+import 'package:venera/utils/io.dart';
+import '../history.dart';
+import 'base_image_provider.dart';
+import 'image_favorites_provider.dart' as image_provider;
+
+class ImageFavoritesProvider
+    extends BaseImageProvider<image_provider.ImageFavoritesProvider> {
+  /// Image provider for imageFavorites
+  const ImageFavoritesProvider(this.imageFavorite);
+
+  final ImageFavorite imageFavorite;
+
+  int get page => imageFavorite.page;
+
+  String get sourceKey => imageFavorite.sourceKey;
+
+  String get cid => imageFavorite.id;
+
+  String get eid => imageFavorite.eid;
+
+  @override
+  Future<Uint8List> load(StreamController<ImageChunkEvent>? chunkEvents) async {
+    var imageKey = imageFavorite.imageKey;
+    var localImage = await getImageFromLocal();
+    if (localImage != null) {
+      return localImage;
+    }
+    var cacheImage = await readFromCache();
+    if (cacheImage != null) {
+      return cacheImage;
+    }
+    var gotImageKey = false;
+    if (imageKey == "") {
+      imageKey = await getImageKey();
+      gotImageKey = true;
+    }
+    Uint8List image;
+    try {
+      image = await getImageFromNetwork(imageKey, chunkEvents);
+    } catch (e) {
+      if (gotImageKey) {
+        rethrow;
+      } else {
+        imageKey = await getImageKey();
+        image = await getImageFromNetwork(imageKey, chunkEvents);
+      }
+    }
+    await writeToCache(image);
+    return image;
+  }
+
+  Future<void> writeToCache(Uint8List image) async {
+    var fileName = md5.convert(key.codeUnits).toString();
+    var file = File(FilePath.join(App.cachePath, 'image_favorites', fileName));
+    if (!file.existsSync()) {
+      file.createSync(recursive: true);
+    }
+    await file.writeAsBytes(image);
+  }
+
+  Future<Uint8List?> readFromCache() async {
+    var fileName = md5.convert(key.codeUnits).toString();
+    var file = File(FilePath.join(App.cachePath, 'image_favorites', fileName));
+    if (!file.existsSync()) {
+      return null;
+    }
+    return await file.readAsBytes();
+  }
+
+  /// Delete a image favorite cache
+  static Future<void> deleteFromCache(ImageFavorite imageFavorite) async {
+    var fileName = md5.convert(imageFavorite.imageKey.codeUnits).toString();
+    var file = File(FilePath.join(App.cachePath, 'image_favorites', fileName));
+    if (file.existsSync()) {
+      await file.delete();
+    }
+  }
+
+  Future<Uint8List?> getImageFromLocal() async {
+    var localComic =
+        LocalManager().find(sourceKey, ComicType.fromKey(sourceKey));
+    if (localComic == null) {
+      return null;
+    }
+    var epIndex = localComic.chapters?.keys.toList().indexOf(eid) ?? -1;
+    if (epIndex == -1 && localComic.hasChapters) {
+      return null;
+    }
+    var images = await LocalManager().getImages(
+      sourceKey,
+      ComicType.fromKey(sourceKey),
+      epIndex,
+    );
+    var data = await File(images[page]).readAsBytes();
+    return data;
+  }
+
+  Future<Uint8List> getImageFromNetwork(
+      String imageKey, StreamController<ImageChunkEvent>? chunkEvents) async {
+    await for (var progress
+        in ImageDownloader.loadComicImage(imageKey, sourceKey, cid, eid)) {
+      if (chunkEvents != null) {
+        chunkEvents.add(ImageChunkEvent(
+          cumulativeBytesLoaded: progress.currentBytes,
+          expectedTotalBytes: progress.totalBytes,
+        ));
+      }
+      if (progress.imageBytes != null) {
+        return progress.imageBytes!;
+      }
+    }
+    throw "Error: Empty response body.";
+  }
+
+  Future<String> getImageKey() async {
+    String sourceKey = imageFavorite.sourceKey;
+    String cid = imageFavorite.id;
+    String eid = imageFavorite.eid;
+    var page = imageFavorite.page;
+    var comicSource = ComicSource.find(sourceKey);
+    if (comicSource == null) {
+      throw "Error: Comic source not found.";
+    }
+    var res = await comicSource.loadComicPages!(cid, eid);
+    return res.data[page - 1];
+  }
+
+  @override
+  Future<ImageFavoritesProvider> obtainKey(ImageConfiguration configuration) {
+    return SynchronousFuture(this);
+  }
+
+  @override
+  String get key =>
+      "ImageFavorites ${imageFavorite.imageKey}@${imageFavorite.sourceKey}@${imageFavorite.id}@${imageFavorite.eid}";
+}

lib/foundation/image_provider/local_favorite_image.dart

@@ -22,7 +22,7 @@ class LocalFavoriteImageProvider
   static void delete(String id, int intKey) {
     var fileName = (id + intKey.toString()).hashCode.toString();
     var file = File(FilePath.join(App.dataPath, 'favorite_cover', fileName));
-    if(file.existsSync()) {
+    if (file.existsSync()) {
       file.delete();
     }
   }
@@ -42,7 +42,7 @@ class LocalFavoriteImageProvider
         cumulativeBytesLoaded: progress.currentBytes,
         expectedTotalBytes: progress.totalBytes,
       ));
-      if(progress.imageBytes != null) {
+      if (progress.imageBytes != null) {
         var data = progress.imageBytes!;
         await file.writeAsBytes(data);
         return data;
@@ -52,7 +52,8 @@ class LocalFavoriteImageProvider
   }
 
   @override
-  Future<LocalFavoriteImageProvider> obtainKey(ImageConfiguration configuration) {
+  Future<LocalFavoriteImageProvider> obtainKey(
+      ImageConfiguration configuration) {
     return SynchronousFuture(this);
   }
 

lib/foundation/local.dart

@@ -36,6 +36,8 @@ class LocalComic with HistoryMixin implements Comic {
   /// chapter id is the name of the directory in `LocalManager.path/$directory`
   final Map<String, String>? chapters;
 
+  bool get hasChapters => chapters != null;
+
   /// relative path to the cover image
   @override
   final String cover;
@@ -119,6 +121,8 @@ class LocalComic with HistoryMixin implements Comic {
               ep: 0,
               page: 0,
             ),
+        author: subtitle,
+        tags: tags,
       ),
     );
   }
@@ -266,7 +270,7 @@ class LocalManager with ChangeNotifier {
   String findValidId(ComicType type) {
     final res = _db.select(
       '''
-      SELECT id FROM comics WHERE comic_type = ? 
+      SELECT id FROM comics WHERE comic_type = ?
       ORDER BY CAST(id AS INTEGER) DESC
       LIMIT 1;
       ''',
@@ -318,8 +322,8 @@ class LocalManager with ChangeNotifier {
   List<LocalComic> getComics(LocalSortType sortType) {
     var res = _db.select('''
       SELECT * FROM comics
-      ORDER BY 
-        ${sortType.value == 'name' ? 'title' : 'created_at'} 
+      ORDER BY
+        ${sortType.value == 'name' ? 'title' : 'created_at'}
         ${sortType.value == 'time_asc' ? 'ASC' : 'DESC'}
       ;
     ''');
@@ -361,7 +365,7 @@ class LocalManager with ChangeNotifier {
 
   LocalComic? findByName(String name) {
     final res = _db.select('''
-      SELECT * FROM comics 
+      SELECT * FROM comics
       WHERE title = ? OR directory = ?;
     ''', [name, name]);
     if (res.isEmpty) {
@@ -385,7 +389,7 @@ class LocalManager with ChangeNotifier {
     }
     var comic = find(id, type) ?? (throw "Comic Not Found");
     var directory = Directory(comic.baseDir);
-    if (comic.chapters != null) {
+    if (comic.hasChapters) {
       var cid =
           ep is int ? comic.chapters!.keys.elementAt(ep - 1) : (ep as String);
       directory = Directory(FilePath.join(directory.path, cid));