public static INxtpRequest Create(Client Client, byte Version, byte[] Data, int DataSize)
{
foreach (Type type in GetTypes())
{
INxtpRequest creator = null;
INxtpRequest request = null;
try
{
creator = (INxtpRequest)Activator.CreateInstance(type);
}
catch
{
// Any error means this class can't handle the protocol,
// so try the next class
}
try
{
bool testMode = false;
if (creator != null && Data != null && DataSize == 4)
{
var text = (Encoding.ASCII.GetString(Data, 0, 4) ?? "").Trim().ToUpper();
testMode = text == "TEST";
}
if (creator != null && (testMode || creator.Version == Version))
{
request = creator.Deserialize(Client, Data, DataSize);
}
}
catch
{
// Any error means this is the correct class for the protocol,
// but we had an error handling it, so return immediately
return(null);
}
return(request);
}
// No classes can handle the protocol
return(null);
}
public virtual INxtpRequest Deserialize(Client Client, byte[] Data, int DataSize)
{
INxtpRequest rv = null;
// Explicitly check for test mode
bool testMode = false;
if (Data != null && Data.Length >= 4 && DataSize == 4)
{
var text = (Encoding.ASCII.GetString(Data, 0, 4) ?? "").Trim().ToUpper();
testMode = text == "TEST";
}
// Test mode always validates
if (testMode)
{
foreach (var tz in TimeZoneInfo.GetSystemTimeZones())
{
string id = tz.Id;
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
TZConvert.TryIanaToWindows(tz.Id, out id);
}
if (id == "GMT Standard Time")
{
this.TimeZoneCode = id.Replace(" ", "");
this.ZoneInfo = tz;
return(this);
}
}
}
// Must be at least one byte for version
if (Data == null || Data.Length <= 0 || Data.Length < DataSize || Data[0] != Version)
{
return(rv);
}
// Must be at least three bytes excluding payload
if (Data.Length < 3)
{
return(rv);
}
// Must be three bytes longer than payload
int payloadLength = Data[1];
int dataLength = payloadLength + 3;
if (DataSize < dataLength)
{
return(rv);
}
// Checksum for all bytes except last must match last byte
byte cs = ChecksumSeed;
for (int i = 0; i < dataLength - 1; i++)
{
cs ^= Data[i];
}
if (Data[dataLength - 1] != cs)
{
return(rv);
}
// Get timezone and see if it is in the current server list
string zone = (Encoding.ASCII.GetString(Data, 2, payloadLength) ?? "").Replace(" ", "").Trim().ToLower();
zone = TimezoneList.ResolveAlias(zone);
if (string.IsNullOrWhiteSpace(zone))
{
return(rv);
}
TimeZoneInfo zoneMatched = null;
var zones = TimeZoneInfo.GetSystemTimeZones();
if (zone == "phoebustime")
{
var rnd = new Random();
int i = rnd.Next(0, zones.Count);
this.TimeZoneCode = zone;
this.ZoneInfo = zones[i];
return(this);
}
foreach (var tz in zones)
{
string id = tz.Id;
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
TZConvert.TryIanaToWindows(tz.Id, out id);
}
if (zone == id.Replace(" ", "").ToLower())
{
zoneMatched = tz;
break;
}
}
if (zoneMatched == null)
{
return(rv);
}
// Passed validation, set timezone
this.Client = Client;
this.TimeZoneCode = zone;
this.ZoneInfo = zoneMatched;
return(this);
}
