timemanager/lib/model/timer_entry.dart

const String tableTimerEntry = 'timer_entry'; // 表名

// 数据库表结构
class TimerEntryFields {
  static const String id = '_id';
  static const String name = 'name';
  static const String createdAt = 'createdAt';
  static const String endAt = 'endAt';
  static const String isActive = 'isActive';
  static const String stopWatch = 'stopWatch';

  static final List<String> values = [
    /// Add all fields
    id, name, createdAt, endAt, isActive, stopWatch
  ];
}

class TimerEntry {
  int? id; // 计时器ID
  String name; // 计时器名称
  Stopwatch? stopwatch; // 计时器
  bool isActice; // 计时器是否在计时
  DateTime createdAt; // 计时器创建时间
  DateTime? endAt; // 计时器结束时间

  // 构造函数
  TimerEntry({required this.name})
      : stopwatch = Stopwatch(),
        isActice = false,
        createdAt = DateTime.now(),
        endAt = DateTime.now();

  bool get isActive => isActice;

  num get stopWatch => stopWatch;

  // 开始计时
  void start() {
    stopwatch!.start();
    isActice = true;
  }

  // 暂停计时
  void pause() {
    stopwatch!.stop();
    isActice = false;
  }

  // 停止计时
  void stop() {
    stopwatch!.stop();
    isActice = false;
    endAt = DateTime.now();
  }

  // 重置计时
  void reset() {
    stopwatch!.reset();
    isActice = false;
    endAt = null;
  }

  // 复制计时器
  TimerEntry copy({
    int? id,
    String? name,
    DateTime? createdAt,
    DateTime? endAt,
    bool? isActive,
    Stopwatch? stopwatch,
  }) =>
      TimerEntry(
        name: name ?? this.name,
      )
        ..id = id ?? this.id
        ..createdAt = createdAt ?? this.createdAt
        ..endAt = endAt ?? this.endAt
        ..isActice = isActive ?? this.isActice
        ..stopwatch = stopwatch ?? this.stopwatch;

  // fromJson
  static TimerEntry fromJson(Map<String, Object?> json) {
    return TimerEntry(
      name: json[TimerEntryFields.name] as String,
    )
      ..id = json[TimerEntryFields.id] as int?
      ..createdAt = DateTime.parse(json[TimerEntryFields.createdAt] as String)
      ..endAt = json[TimerEntryFields.endAt] == null
          ? null
          : DateTime.parse(json[TimerEntryFields.endAt] as String)
      ..isActice = json[TimerEntryFields.isActive] == 1 ? true : false
      ..stopwatch = Stopwatch();
  }

  // toJson
  Map<String, Object?> toJson() {
    return {
      TimerEntryFields.id: id,
      TimerEntryFields.name: name,
      TimerEntryFields.createdAt: createdAt.toIso8601String(),
      TimerEntryFields.endAt: endAt?.toIso8601String(),
      TimerEntryFields.isActive: isActice ? 1 : 0,
      TimerEntryFields.stopWatch: stopwatch!.elapsed.inMilliseconds,
    };
  }
}