基础功能

lib/utils/database_helper.dart

@@ -0,0 +1,81 @@
+import 'package:sqflite/sqflite.dart';
+import 'package:path/path.dart';
+
+/// 数据库帮助类 - 管理数据库的创建和版本控制
+class DatabaseHelper {
+  static final DatabaseHelper instance = DatabaseHelper._init();
+  static Database? _database;
+
+  DatabaseHelper._init();
+
+  Future<Database> get database async {
+    if (_database != null) return _database!;
+    _database = await _initDB('mooknote.db');
+    return _database!;
+  }
+
+  Future<Database> _initDB(String filePath) async {
+    final dbPath = await getDatabasesPath();
+    final path = join(dbPath, filePath);
+
+    return await openDatabase(
+      path,
+      version: 1,
+      onCreate: _createDB,
+    );
+  }
+
+  // 创建数据库表
+  Future<void> _createDB(Database db, int version) async {
+    const idType = 'INTEGER PRIMARY KEY AUTOINCREMENT';
+    const textType = 'TEXT NOT NULL';
+    const integerType = 'INTEGER NOT NULL';
+    const booleanType = 'INTEGER NOT NULL';
+
+    // 影视表
+    await db.execute('''
+      CREATE TABLE movies (
+        id $idType,
+        title $textType,
+        poster TEXT,
+        rating REAL,
+        year INTEGER,
+        status $textType,
+        watch_date TEXT,
+        note TEXT
+      )
+    ''');
+
+    // 书籍表
+    await db.execute('''
+      CREATE TABLE books (
+        id $idType,
+        title $textType,
+        author TEXT,
+        cover TEXT,
+        rating REAL,
+        status $textType,
+        read_date TEXT,
+        note TEXT
+      )
+    ''');
+
+    // 笔记表
+    await db.execute('''
+      CREATE TABLE notes (
+        id $idType,
+        title $textType,
+        content $textType,
+        tags TEXT,
+        created_at $textType,
+        updated_at $textType
+      )
+    ''');
+  }
+
+  // 关闭数据库
+  Future close() async {
+    final db = await instance.database;
+    db.close();
+  }
+}