public void ProcessRequest(HttpContext context)
{
try
{
if (uint.TryParse(MinimumAcceptedMatchScore, out _minimumAcceptedMatchScore) == false)
{
_minimumAcceptedMatchScore = 30;
}
Resource newResource = FHIRUtilities.StreamToFHIR(new StreamReader(context.Request.InputStream));
_biometics = (Media)newResource;
// TODO send to biometric match engine. If found, add patient reference to FHIR message.
// convert FHIR fingerprint message (_biometics) to AFIS template class
Template probe = ConvertFHIR.FHIRToTemplate(_biometics);
dbMinutia = new FingerPrintMatchDatabase(_databaseDirectory, _backupDatabaseDirectory, _minimumAcceptedMatchScore);
try
{
dbMinutia.LateralityCode = (FHIRUtilities.LateralitySnoMedCode)probe.NoID.LateralitySnoMedCode;
dbMinutia.CaptureSite = (FHIRUtilities.CaptureSiteSnoMedCode)probe.NoID.CaptureSiteSnoMedCode;
}
catch { }
MinutiaResult minutiaResult = dbMinutia.SearchPatients(probe);
if (minutiaResult != null)
{
if (minutiaResult.NoID != null && minutiaResult.NoID.Length > 0)
{
// Fingerprint found in database
// check if patient is already pending.
MongoDBWrapper dbwrapper = new MongoDBWrapper(NoIDMongoDBAddress, SparkMongoDBAddress);
string currentStatus = dbwrapper.GetCurrentStatus(minutiaResult.NoID);
if (currentStatus.ToLower() != "pending")
{
_responseText = minutiaResult.NoID; //TODO: for now, it returns the localNoID. should return a FHIR response.
}
else
{
_responseText = "pending";
}
LogUtilities.LogEvent(_responseText);
}
else
{
_responseText = "No local database match.";
LogUtilities.LogEvent(_responseText);
}
}
else
{
_responseText = "No local database match.";
LogUtilities.LogEvent(_responseText);
}
dbMinutia.Dispose();
LogUtilities.LogEvent("After dbMinutia.Dispose();");
}
catch (Exception ex)
{
_exception = ex;
_responseText = ex.Message;
}
context.Response.Write(_responseText);
context.Response.End();
}
private void OnCaptured(CaptureResult captureResult)
{
// Check capture quality and throw an error if poor or incomplete capture.
if (!biometricDevice.CheckCaptureResult(captureResult))
{
return;
}
Constants.CaptureQuality quality = captureResult.Quality;
if ((int)quality != 0)
{
Quality = (int)quality;
PoorCaputure(quality, new EventArgs());
return;
}
currentCapture = new SourceAFIS.Simple.Person();
Fingerprint newFingerPrint = new Fingerprint();
foreach (Fid.Fiv fiv in captureResult.Data.Views)
{
newFingerPrint.AsBitmap = ImageUtilities.CreateBitmap(fiv.RawImage, fiv.Width, fiv.Height);
}
currentCapture.Fingerprints.Add(newFingerPrint);
Afis.Extract(currentCapture);
Template tmpCurrent = newFingerPrint.GetTemplate();
if (FingerCaptured != null)
{
FingerCaptured(newFingerPrint, new EventArgs());
}
_capturedFingerprints.Add(newFingerPrint);
if (_minutiaCaptureController.MatchFound == false)
{
if (_minutiaCaptureController.AddMinutiaTemplateProbe(tmpCurrent) == true)
{
// Good pair found.
bestFingerprint1 = newFingerPrint;
bestFingerprint2 = _capturedFingerprints[_minutiaCaptureController.OtherBestFingerprintItem];
if (NewBestMatchFound != null)
{
NewBestMatchFound(bestFingerprint2, new EventArgs());
}
}
else
{
// Good fingerprint pairs not found yet. Try again.
return;
}
}
// Lookup minitia pair in database.
// If found, show NoID
// If not found, save minutia pair in database with new NoID.
// probe is set, search database for match.
Template Template1 = bestFingerprint1.GetTemplate();
Template Template2 = bestFingerprint2.GetTemplate();
MinutiaResult idFound = IdentifyFinger(tmpCurrent);
if ((idFound != null && idFound.NoID.Length > 0))
{
// Fingerprint found in database
Score = idFound.Score;
if (DatabaseMatchFound != null)
{
DatabaseMatchFound(newFingerPrint, new EventArgs());
}
if (NoID.Length == 0)
{
NoID = idFound.NoID;
}
else if (NoID.Length > 0 && NoID != idFound.NoID)
{
//critical error! create false assert here.
NoID = idFound.NoID;
if (DatabaseMatchError != null)
{
DatabaseMatchError(newFingerPrint, new EventArgs());
}
}
}
else
{
// Not found in database
Score = 0;
if (DoesNotMatch != null)
{
DoesNotMatch(newFingerPrint, new EventArgs());
}
if (NoID.Length == 0)
{
Template1.NoID.LocalNoID = Guid.NewGuid().ToString();
Template2.NoID = Template1.NoID;
dbMinutia.AddTemplate(Template1);
dbMinutia.AddTemplate(Template2);
// trigger event NewPatientAdded
}
}
}
public FHIRMessageRouter(HttpContext context)
{
try
{
if (uint.TryParse(MinimumAcceptedMatchScore, out _minimumAcceptedMatchScore) == false)
{
_minimumAcceptedMatchScore = 30;
}
Resource newResource = FHIRUtilities.StreamToFHIR(new StreamReader(context.Request.InputStream));
switch (newResource.TypeName.ToLower())
{
case "patient":
//if new patient. TODO: check meta for NoID status
SessionQueue seq = new SessionQueue();
_patient = (Patient)newResource;
string sessionID = "";
if (_patient.Identifier.Count > 0)
{
foreach (Identifier id in _patient.Identifier)
{
if (id.System.ToString().ToLower().Contains("session") == true)
{
sessionID = id.Value.ToString();
}
}
}
Patient ptSaved = (Patient)SendPatientToSparkServer();
if (ptSaved == null)
{
_responseText = "Error sending Patient FHIR message to the Spark FHIR endpoint. " + ExceptionString;
return;
}
string LocalNoID = ptSaved.Id.ToString();
//TODO: make this an atomic transaction.
// delete the FHIR message from Spark if there is an error in the minutia.
//TODO check for existing patient and expire old messages for the patient.
if (_patient.Photo.Count > 0)
{
dbMinutia = new FingerPrintMatchDatabase(_databaseDirectory, _backupDatabaseDirectory, _minimumAcceptedMatchScore);
foreach (var minutia in _patient.Photo)
{
byte[] byteMinutias = minutia.Data;
Stream stream = new MemoryStream(byteMinutias);
Media media = (Media)FHIRUtilities.StreamToFHIR(new StreamReader(stream));
// Save minutias for matching.
Template fingerprintTemplate = ConvertFHIR.FHIRToTemplate(media);
fingerprintTemplate.NoID.LocalNoID = LocalNoID;
try
{
dbMinutia.LateralityCode = (FHIRUtilities.LateralitySnoMedCode)fingerprintTemplate.NoID.LateralitySnoMedCode;
dbMinutia.CaptureSite = (FHIRUtilities.CaptureSiteSnoMedCode)fingerprintTemplate.NoID.CaptureSiteSnoMedCode;
}
catch { }
if (dbMinutia.AddTemplate(fingerprintTemplate) == false)
{
_responseText = "Error adding a fingerprint to the match database.";
}
}
dbMinutia.Dispose();
_responseText = "Successful.";
}
break;
case "media":
_biometics = (Media)newResource;
// TODO send to biometric match engine. If found, add patient reference to FHIR message.
// convert FHIR fingerprint message (_biometics) to AFIS template class
Template probe = ConvertFHIR.FHIRToTemplate(_biometics);
dbMinutia = new FingerPrintMatchDatabase(_databaseDirectory, _backupDatabaseDirectory, _minimumAcceptedMatchScore);
try
{
dbMinutia.LateralityCode = (FHIRUtilities.LateralitySnoMedCode)probe.NoID.LateralitySnoMedCode;
dbMinutia.CaptureSite = (FHIRUtilities.CaptureSiteSnoMedCode)probe.NoID.CaptureSiteSnoMedCode;
}
catch { }
MinutiaResult minutiaResult = dbMinutia.SearchPatients(probe);
if (minutiaResult != null)
{
if (minutiaResult.NoID != null && minutiaResult.NoID.Length > 0)
{
// Fingerprint found in database
_responseText = minutiaResult.NoID; //TODO: for now, it returns the localNoID. should return a FHIR response.
}
else
{
_responseText = "No local database match.";
}
}
else
{
_responseText = "No local database match.";
}
dbMinutia.Dispose();
if (!(SendBiometicsToSparkServer()))
{
_responseText = "Error sending Biometric Media FHIR message to the Spark FHIR endpoint. " + ExceptionString;
}
break;
default:
_responseText = newResource.TypeName.ToLower() + " not supported.";
break;
}
}
catch (Exception ex)
{
_responseText = "Error in FHIRMessageRouter::FHIRMessageRouter: " + ex.Message;
}
}
private void OnCaptured(CaptureResult captureResult)
{
// Check capture quality and throw an error if bad.
if (!biometricDevice.CheckCaptureResult(captureResult))
{
return;
}
bool match = false;
float score = 0;
Afis.Threshold = 70;
currentCapture = new SourceAFIS.Simple.Person();
Fingerprint newFingerPrint = new Fingerprint();
foreach (Fid.Fiv fiv in captureResult.Data.Views)
{
newFingerPrint.AsBitmap = ImageUtilities.CreateBitmap(fiv.RawImage, fiv.Width, fiv.Height);
}
currentCapture.Fingerprints.Add(newFingerPrint);
Afis.Extract(currentCapture);
Template tmpCurrent = newFingerPrint.GetTemplate();
if (!(bestCapture == null))
{
score = Afis.Verify(currentCapture, bestCapture);
match = (score > Afis.Threshold);
}
else if ((bestCapture == null) && !(previousCapture == null))
{
score = Afis.Verify(currentCapture, previousCapture);
match = (score > Afis.Threshold);
}
if (FingerCaptured != null)
{
FingerCaptured(tmpCurrent, new EventArgs());
}
if (match)
{
Template tmp;
if (!(bestCapture == null))
{
tmp = bestCapture.Fingerprints[0].GetTemplate();
if (tmpCurrent.Minutiae.Length >= tmp.Minutiae.Length)
{
bestCapture = currentCapture;
}
}
else if (!(previousCapture == null))
{
tmp = previousCapture.Fingerprints[0].GetTemplate();
if (tmp.Minutiae.Length > tmpCurrent.Minutiae.Length)
{
bestCapture = previousCapture;
}
else
{
bestCapture = currentCapture;
}
}
tmp = bestCapture.Fingerprints[0].GetTemplate();
MinutiaResult idFound = IdentifyFinger(tmp);
if ((fGoodPairFound == false) && (patientNoID.NoID.Length == 0) && (idFound.NoID.Length == 0))
{
tmp.NoID.LocalNoID = "NoID" + nextID;
dbMinutia.AddTemplate(tmp);
patientNoID = idFound;
nextID++;
}
else if ((fGoodPairFound == true) && (patientNoID.NoID.Length > 0) && (idFound.NoID.Length == 0))
{
if (DatabaseMatchError != null)
{
DatabaseMatchError(tmpCurrent, new EventArgs());
}
}
else
{
if (DatabaseMatchFound != null)
{
DatabaseMatchFound(tmpCurrent, new EventArgs());
}
}
if (fGoodPairFound == false)
{
fGoodPairFound = true;
if (GoodPairFound != null)
{
GoodPairFound(tmp, new EventArgs());
}
}
}
previousCapture = currentCapture;
}
