generated from dellevin/template
118 lines
3.3 KiB
Dart
118 lines
3.3 KiB
Dart
import 'package:sqflite/sqflite.dart';
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import '../../models/book_annotation.dart';
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import '../database_helper.dart';
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/// 书籍批注数据访问对象
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class BookAnnotationDao {
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final DatabaseHelper _dbHelper = DatabaseHelper.instance;
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Future<Database> get _db async => await _dbHelper.database;
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/// 插入批注，返回插入的 id
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Future<int> insert(BookAnnotation annotation) async {
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final db = await _db;
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return await db.insert('book_annotations', annotation.toMap()..remove('id'));
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}
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/// 更新批注
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Future<void> update(BookAnnotation annotation) async {
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final db = await _db;
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await db.update(
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'book_annotations',
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annotation.toMap(),
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where: 'id = ?',
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whereArgs: [annotation.id],
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);
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}
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/// 保存（有 id 则更新，无 id 则插入）
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Future<BookAnnotation> save(BookAnnotation annotation) async {
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if (annotation.id != null) {
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await update(annotation);
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return annotation;
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}
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final id = await insert(annotation);
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return annotation.copyWith(id: id);
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}
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/// 根据 id 删除
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Future<void> deleteById(int id) async {
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final db = await _db;
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await db.delete('book_annotations', where: 'id = ?', whereArgs: [id]);
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}
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/// 根据 CFI 删除（用于删除高亮/下划线）
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Future<void> deleteByCfi(String bookId, String cfi) async {
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final db = await _db;
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await db.delete(
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'book_annotations',
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where: 'book_id = ? AND cfi = ?',
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whereArgs: [bookId, cfi],
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);
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}
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/// 查询某本书的所有批注
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Future<List<BookAnnotation>> getByBookId(String bookId) async {
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final db = await _db;
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final maps = await db.query(
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'book_annotations',
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where: 'book_id = ?',
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whereArgs: [bookId],
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orderBy: 'created_at DESC',
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);
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return maps.map((m) => BookAnnotation.fromMap(m)).toList();
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}
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/// 查询某本书的某种类型批注
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Future<List<BookAnnotation>> getByBookIdAndType(String bookId, String type) async {
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final db = await _db;
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final maps = await db.query(
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'book_annotations',
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where: 'book_id = ? AND type = ?',
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whereArgs: [bookId, type],
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orderBy: 'created_at DESC',
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);
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return maps.map((m) => BookAnnotation.fromMap(m)).toList();
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}
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/// 查询某本书的所有书签
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Future<List<BookAnnotation>> getBookmarks(String bookId) async {
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return getByBookIdAndType(bookId, 'bookmark');
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}
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/// 查询某本书的所有高亮/下划线
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Future<List<BookAnnotation>> getAnnotations(String bookId) async {
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final db = await _db;
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final maps = await db.query(
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'book_annotations',
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where: "book_id = ? AND type IN ('highlight', 'underline')",
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whereArgs: [bookId],
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orderBy: 'created_at DESC',
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);
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return maps.map((m) => BookAnnotation.fromMap(m)).toList();
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}
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/// 根据 id 查询
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Future<BookAnnotation?> getById(int id) async {
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final db = await _db;
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final maps = await db.query(
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'book_annotations',
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where: 'id = ?',
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whereArgs: [id],
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limit: 1,
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);
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if (maps.isEmpty) return null;
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return BookAnnotation.fromMap(maps.first);
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}
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/// 获取某本书的批注数量
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Future<int> getCount(String bookId) async {
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final db = await _db;
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final result = await db.rawQuery(
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'SELECT COUNT(*) as cnt FROM book_annotations WHERE book_id = ?',
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[bookId],
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);
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return Sqflite.firstIntValue(result) ?? 0;
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}
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}
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