基础功能

lib/utils/movie_dao.dart

@@ -0,0 +1,81 @@
+import 'package:sqflite/sqflite.dart';
+import '../models/data_models.dart';
+import 'database_helper.dart';
+
+/// 影视数据访问对象
+class MovieDao {
+  final DatabaseHelper _dbHelper = DatabaseHelper.instance;
+
+  // 获取所有影视记录
+  Future<List<Movie>> getAllMovies() async {
+    final db = await _dbHelper.database;
+    final List<Map<String, dynamic>> maps = await db.query('movies');
+
+    return List.generate(maps.length, (i) {
+      return Movie(
+        id: maps[i]['id'].toString(),
+        title: maps[i]['title'],
+        poster: maps[i]['poster'],
+        rating: maps[i]['rating']?.toDouble(),
+        year: maps[i]['year'],
+        status: maps[i]['status'],
+        watchDate: maps[i]['watch_date'] != null 
+            ? DateTime.parse(maps[i]['watch_date']) 
+            : null,
+        note: maps[i]['note'],
+      );
+    });
+  }
+
+  // 根据状态筛选影视记录
+  Future<List<Movie>> getMoviesByStatus(String status) async {
+    final db = await _dbHelper.database;
+    final List<Map<String, dynamic>> maps = await db.query(
+      'movies',
+      where: 'status = ?',
+      whereArgs: [status],
+    );
+
+    return List.generate(maps.length, (i) {
+      return Movie(
+        id: maps[i]['id'].toString(),
+        title: maps[i]['title'],
+        poster: maps[i]['poster'],
+        rating: maps[i]['rating']?.toDouble(),
+        year: maps[i]['year'],
+        status: maps[i]['status'],
+        watchDate: maps[i]['watch_date'] != null 
+            ? DateTime.parse(maps[i]['watch_date']) 
+            : null,
+        note: maps[i]['note'],
+      );
+    });
+  }
+
+  // 添加影视记录
+  Future<int> insertMovie(Movie movie) async {
+    final db = await _dbHelper.database;
+    return await db.insert('movies', movie.toJson());
+  }
+
+  // 更新影视记录
+  Future<int> updateMovie(Movie movie) async {
+    final db = await _dbHelper.database;
+    return await db.update(
+      'movies',
+      movie.toJson(),
+      where: 'id = ?',
+      whereArgs: [movie.id],
+    );
+  }
+
+  // 删除影视记录
+  Future<int> deleteMovie(String id) async {
+    final db = await _dbHelper.database;
+    return await db.delete(
+      'movies',
+      where: 'id = ?',
+      whereArgs: [id],
+    );
+  }
+}