public static Message ConvertFrom(byte[] buffer)
{
if (!Validate(buffer))
{
Log(buffer);
return(null);
}
var length = buffer.ReadShort(2);
string key = Unity.GetDeviceNumber(buffer, 4);
DeviceInfo device = DeviceCache.Current.Get(key);
if (device == null)
{
device = new DeviceInfo();
device.OrgId = 0;
device.ModelCode = 0;
device.KindCode = 0;
device.DeviceNumber = key;
device.OnLineTime = DateTime.Now;
device.DeviceStatus = 1;
device.SoftwareVersion = "00000000";// Unity.GetMechineVersion(buffer, 15);
}
var messageType = buffer[13];// (short)(BitConverter.ToInt16(buffer, 12) >> 8);
var msg = new Message()
{
Length = length,
Type = messageType,
Device = device
};
if (messageType == (short)MessageType.Beep)
{
return(msg);
}
msg.Key = buffer[14];
if (messageType == (short)MessageType.Login)
{
if (device.PkId == 0)
{
device.SoftwareVersion = Unity.GetMechineVersion(buffer, 15);
DeviceCache.Current.Set(device);
}
}
int KEY_LENGTH = 1;
var dataLength = length - PAKAGE_FLAG_LENGTH;
if (dataLength > 0)
{
dataLength -= KEY_LENGTH;
if (messageType == (short)MessageType.Detail || messageType == 160)
{
msg.Currency = Unity.GetCurrency(buffer, 15, msg.Key);
if (msg.Device != null)
{
msg.Currency.OrgId = msg.Device.OrgId;
msg.Currency.DeviceKindCode = msg.Device.KindCode;
msg.Currency.DeviceModelCode = msg.Device.ModelCode;
msg.Currency.DeviceNumber = msg.Device.DeviceNumber;
}
}
else
{
var index = 15;
if (messageType == (short)MessageType.DownLoadBlackTable)
{
dataLength += KEY_LENGTH;
index -= KEY_LENGTH;
}
var data = new byte[dataLength];
Array.Copy(buffer, index, data, 0, dataLength);
msg.Datas = data;
}
}
return(msg);
}