<?php

namespace app\store\model;

use think\Model;

/**
 * 设备模型
 * Class DeviceModel
 * @package app\store\model
 */
class DeviceModel extends Model
{
    // 设置表名
    protected $name = 'device';
    
    // 设置主键
    protected $pk = 'id';
    
    // 自动时间戳
    protected $autoWriteTimestamp = false;
    
    /**
     * 根据设备IMEI获取设备信息
     * @param string $deviceImei 设备IMEI
     * @return array|null
     */
    public static function getByDeviceImei($deviceImei)
    {
        return self::where('deviceImei', $deviceImei)
            ->where('deleteTime', 0)
            ->find();
    }
    
    /**
     * 检查设备是否在线
     * @param int $deviceId 设备ID
     * @return bool
     */
    public static function isOnline($deviceId)
    {
        $device = self::where('id', $deviceId)
            ->where('deleteTime', 0)
            ->find();
        
        return $device && $device['alive'] == 1;
    }
}