flutter_server_box/lib/data/model/server/cpu_status.dart

get initOneTimeCpuStatus => OneTimeCpuStatus(
      'cpu',
      0,
      0,
      0,
      0,
      0,
      0,
      0,
    );
get initCpuStatus => CpuStatus(
      [initOneTimeCpuStatus],
      [initOneTimeCpuStatus],
      '',
    );

class CpuStatus {
  List<OneTimeCpuStatus> _pre;
  List<OneTimeCpuStatus> _now;
  String temp;
  CpuStatus(this._pre, this._now, this.temp);

  double usedPercent({int coreIdx = 0}) {
    if (_now.length != _pre.length) return 0;
    final idleDelta = _now[coreIdx].idle - _pre[coreIdx].idle;
    final totalDelta = _now[coreIdx].total - _pre[coreIdx].total;
    final used = idleDelta / totalDelta;
    return used.isNaN ? 0 : 100 - used * 100;
  }

  void update(List<OneTimeCpuStatus> newStatus, String newTemp) {
    _pre = _now;
    _now = newStatus;
    temp = newTemp;
  }

  int get coresCount => _now.length;

  int get totalDelta => _now[0].total - _pre[0].total;

  double get user {
    if (_now.length != _pre.length) return 0;
    final delta = _now[0].user - _pre[0].user;
    final used = delta / totalDelta;
    return used.isNaN ? 0 : used * 100;
  }

  double get sys {
    if (_now.length != _pre.length) return 0;
    final delta = _now[0].sys - _pre[0].sys;
    final used = delta / totalDelta;
    return used.isNaN ? 0 : used * 100;
  }

  double get nice {
    if (_now.length != _pre.length) return 0;
    final delta = _now[0].nice - _pre[0].nice;
    final used = delta / totalDelta;
    return used.isNaN ? 0 : used * 100;
  }

  double get iowait {
    if (_now.length != _pre.length) return 0;
    final delta = _now[0].iowait - _pre[0].iowait;
    final used = delta / totalDelta;
    return used.isNaN ? 0 : used * 100;
  }

  double get idle => 100 - usedPercent();
}

///
/// Code generated by jsonToDartModel https://ashamp.github.io/jsonToDartModel/
///
class OneTimeCpuStatus {
/*
{
  "user": 0,
  "sys": 0,
  "nice": 0,
  "idel": 0,
  "wa": 0,
  "hi": 0,
  "si": 0,
  "st": 0
} 
*/
  late String id;
  late int user;
  late int sys;
  late int nice;
  late int idle;
  late int iowait;
  late int irq;
  late int softirq;

  OneTimeCpuStatus(
    this.id,
    this.user,
    this.sys,
    this.nice,
    this.idle,
    this.iowait,
    this.irq,
    this.softirq,
  );

  int get total => user + sys + nice + idle + iowait + irq + softirq;
}