基础epub阅读功能

2026-06-27 11:20:27 +08:00
parent 02242089e8
commit 5acbc3a602
18 changed files with 980 additions and 330 deletions
--- a/lib/utils/reader/book_annotation_dao.dart
+++ b/lib/utils/reader/book_annotation_dao.dart
@@ -0,0 +1,117 @@
+import 'package:sqflite/sqflite.dart';
+import '../../models/book_annotation.dart';
+import '../database_helper.dart';
+
+/// 书籍批注数据访问对象
+class BookAnnotationDao {
+  final DatabaseHelper _dbHelper = DatabaseHelper.instance;
+
+  Future<Database> get _db async => await _dbHelper.database;
+
+  /// 插入批注，返回插入的 id
+  Future<int> insert(BookAnnotation annotation) async {
+    final db = await _db;
+    return await db.insert('book_annotations', annotation.toMap()..remove('id'));
+  }
+
+  /// 更新批注
+  Future<void> update(BookAnnotation annotation) async {
+    final db = await _db;
+    await db.update(
+      'book_annotations',
+      annotation.toMap(),
+      where: 'id = ?',
+      whereArgs: [annotation.id],
+    );
+  }
+
+  /// 保存（有 id 则更新，无 id 则插入）
+  Future<BookAnnotation> save(BookAnnotation annotation) async {
+    if (annotation.id != null) {
+      await update(annotation);
+      return annotation;
+    }
+    final id = await insert(annotation);
+    return annotation.copyWith(id: id);
+  }
+
+  /// 根据 id 删除
+  Future<void> deleteById(int id) async {
+    final db = await _db;
+    await db.delete('book_annotations', where: 'id = ?', whereArgs: [id]);
+  }
+
+  /// 根据 CFI 删除（用于删除高亮/下划线）
+  Future<void> deleteByCfi(String bookId, String cfi) async {
+    final db = await _db;
+    await db.delete(
+      'book_annotations',
+      where: 'book_id = ? AND cfi = ?',
+      whereArgs: [bookId, cfi],
+    );
+  }
+
+  /// 查询某本书的所有批注
+  Future<List<BookAnnotation>> getByBookId(String bookId) async {
+    final db = await _db;
+    final maps = await db.query(
+      'book_annotations',
+      where: 'book_id = ?',
+      whereArgs: [bookId],
+      orderBy: 'created_at DESC',
+    );
+    return maps.map((m) => BookAnnotation.fromMap(m)).toList();
+  }
+
+  /// 查询某本书的某种类型批注
+  Future<List<BookAnnotation>> getByBookIdAndType(String bookId, String type) async {
+    final db = await _db;
+    final maps = await db.query(
+      'book_annotations',
+      where: 'book_id = ? AND type = ?',
+      whereArgs: [bookId, type],
+      orderBy: 'created_at DESC',
+    );
+    return maps.map((m) => BookAnnotation.fromMap(m)).toList();
+  }
+
+  /// 查询某本书的所有书签
+  Future<List<BookAnnotation>> getBookmarks(String bookId) async {
+    return getByBookIdAndType(bookId, 'bookmark');
+  }
+
+  /// 查询某本书的所有高亮/下划线
+  Future<List<BookAnnotation>> getAnnotations(String bookId) async {
+    final db = await _db;
+    final maps = await db.query(
+      'book_annotations',
+      where: "book_id = ? AND type IN ('highlight', 'underline')",
+      whereArgs: [bookId],
+      orderBy: 'created_at DESC',
+    );
+    return maps.map((m) => BookAnnotation.fromMap(m)).toList();
+  }
+
+  /// 根据 id 查询
+  Future<BookAnnotation?> getById(int id) async {
+    final db = await _db;
+    final maps = await db.query(
+      'book_annotations',
+      where: 'id = ?',
+      whereArgs: [id],
+      limit: 1,
+    );
+    if (maps.isEmpty) return null;
+    return BookAnnotation.fromMap(maps.first);
+  }
+
+  /// 获取某本书的批注数量
+  Future<int> getCount(String bookId) async {
+    final db = await _db;
+    final result = await db.rawQuery(
+      'SELECT COUNT(*) as cnt FROM book_annotations WHERE book_id = ?',
+      [bookId],
+    );
+    return Sqflite.firstIntValue(result) ?? 0;
+  }
+}