project_telephony/lib/base/DBManager.dart

import 'dart:io';

import 'package:flustars/flustars.dart';
import 'package:path_provider/path_provider.dart';
import 'package:project_telephony/model/send_number_model.dart';
import 'package:sqflite/sqflite.dart';
import 'package:path/path.dart';

class DBManager {
  /// 数据库名
  final String _dbName = "dbName";

  /// 数据库版本
  final int _version = 1;

  static final DBManager _instance = DBManager._();

  factory DBManager() {
    return _instance;
  }

  DBManager._();

  static Database? _db;

  Future<Database> get db async {
    return _db ??= await _initDB();
  }

  /// 初始化数据库
  Future<Database> _initDB() async {
    Directory directory = await getApplicationDocumentsDirectory();
    String path = join(directory.path, _dbName);
    return await openDatabase(
      path,
      version: _version,
      onCreate: _onCreate,
      onUpgrade: _onUpgrade,
    );
  }

  /// 创建表
  Future _onCreate(Database db, int version) async {
    const String sql = """
    CREATE TABLE SendNumber(
      id INTEGER primary key AUTOINCREMENT,
      sendNumber TEXT,
      createdAt datetime
    )
    """;
    return await db.execute(sql);
  }

  /// 更新表
  Future _onUpgrade(Database db, int oldVersion, int newVersion) async {}

  /// 保存数据
  Future saveData(SendNumber sendNumber) async {
    Database database = await db;
    return await database.insert("SendNumber", sendNumber.toJson());
  }

  /// 使用SQL保存数据
  Future saveDataBySQL(SendNumber sendNumber) async {
    const String sql = """
    INSERT INTO SendNumber(sendNumber,createdAt) values(?,?)
    """;
    Database database = await db;
    return await database.rawInsert(sql, [sendNumber.sendNumber, sendNumber.createdAt]);
  }

  /// 查询全部数据
  Future<List<SendNumber>?> findAll() async {
    Database? database = await db;
    List<Map<String, Object?>> result = await database.query("SendNumber");
    if (result.isNotEmpty) {
      return result.map((e) => SendNumber.fromJson(e)).toList();
    } else {
      return [];
    }
  }

  ///条件查询
  Future<List<SendNumber>?> find(String sendNumber) async {
    Database database = await db;
    List<Map<String, Object?>> result =
    await database.query("SendNumber", where: "sendNumber=?", whereArgs: [sendNumber]);
    if (result.isNotEmpty) {
      return result.map((e) => SendNumber.fromJson(e)).toList();
    } else {
      return [];
    }
  }

  /// 修改
  Future<int> update(SendNumber sendNumber) async {
    Database database = await db;
    sendNumber.createdAt = DateUtil.formatDate(DateTime.now());
    int count =
    await database.update("SendNumber", sendNumber.toJson(), where: "sendNumber=?", whereArgs: [sendNumber.sendNumber]);
    return count;
  }
}