public IActionResult FillPrescription(string transID)
{
ViewBag.DoctorName = HttpContext.Session.GetString(Globals.currentUserName);
if (HttpContext.Session.GetString(Globals.currentDSPriK) == null || HttpContext.Session.GetString(Globals.currentDAPriK) == null)
{
return(RedirectToAction("Login"));
}
else if (HttpContext.Session.GetString(Globals.currentPSPubK) == null || HttpContext.Session.GetString(Globals.currentPAPubK) == null)
{
return(RedirectToAction("PatientLookUp"));
}
else
{
Assets <PatientCredAssetData> userAsset = _bigChainDbService.GetPatientAssetFromID(HttpContext.Session.GetString(Globals.currentPPHN));
var patientSignPublicKey = HttpContext.Session.GetString(Globals.currentPSPubK);
PatientCredMetadata userMetadata = _bigChainDbService.GetMetadataFromAssetPublicKey <PatientCredMetadata>(userAsset.id, patientSignPublicKey);
var patientInfo = userAsset.data.Data;
patientInfo.FingerprintData = null;
var doctorSignPrivateKey = HttpContext.Session.GetString(Globals.currentDSPriK);
var doctorAgreePrivateKey = HttpContext.Session.GetString(Globals.currentDAPriK);
var doctorSignPublicKey = EncryptionService.getSignPublicKeyStringFromPrivate(doctorSignPrivateKey);
var prescriptionData = _bigChainDbService.GetMetaDataAndAssetFromTransactionId <string, PrescriptionMetadata>(transID);
var hashedKey = prescriptionData.metadata.AccessList[doctorSignPublicKey];
var dataDecryptionKey = EncryptionService.getDecryptedEncryptionKey(hashedKey, doctorAgreePrivateKey);
var data = EncryptionService.getDecryptedAssetData(prescriptionData.data.Data, dataDecryptionKey);
var viewModel = new FillPrescriptionViewModel()
{
PatientAsset = patientInfo,
PatientMetadata = userMetadata,
PrescriptionData = new PrescriptionFullData
{
assetData = JsonConvert.DeserializeObject <Prescription>(data),
Metadata = prescriptionData.metadata.data,
transID = prescriptionData.transID,
assetID = prescriptionData.id
}
};
TempData["viewModel"] = JsonConvert.SerializeObject(viewModel);
return(View(viewModel));
}
}
public IActionResult FillPrescription(FillPrescriptionViewModel fillPrescriptionViewModel)
{
// Get's the Doctor's information for current session
ViewBag.DoctorName = HttpContext.Session.GetString(Globals.currentUserName);
var oldViewModel = JsonConvert.DeserializeObject <FillPrescriptionViewModel>(TempData["viewModel"] as string);
fillPrescriptionViewModel.PrescriptionData = oldViewModel.PrescriptionData;
fillPrescriptionViewModel.PatientAsset = oldViewModel.PatientAsset;
fillPrescriptionViewModel.PatientMetadata = oldViewModel.PatientMetadata;
TempData["viewModel"] = JsonConvert.SerializeObject(fillPrescriptionViewModel);
if (!ModelState.IsValid)
{
return(View(fillPrescriptionViewModel));
}
string PHN = HttpContext.Session.GetString(Globals.currentPPHN);
string patientSignPublicKey = HttpContext.Session.GetString(Globals.currentPSPubK);
string keyword = fillPrescriptionViewModel.PatientKeyword;
// Searches for a patient with the specified PHN
Assets <UserCredAssetData> userAsset = _bigChainDbService.GetUserAssetFromTypeID(AssetType.Patient, PHN);
if (userAsset == null)
{
ModelState.AddModelError("", "Could not find a patient profile with PHN: " + PHN);
return(View(fillPrescriptionViewModel));
}
// Send request to the Client Computer to authenticate with fingerprint
int numScans = 1;
List <Image> fpList = FingerprintService.authenticateFP("24.84.225.22", numScans); // DEBUG: Jacob's Computer
// Check if fingerprint data is valid
if (fpList.Count < numScans)
{
ModelState.AddModelError("", "Something went wrong with the fingerprint scan, try again.");
return(View(fillPrescriptionViewModel));
}
Image fpImg = fpList[0];
// Decrypt the patient's fingerprint data stored in the Blockchain
byte[] dbFpData = null;
string patientSignPrivateKey, patientAgreePrivateKey;
List <string> dbList = userAsset.data.Data.FingerprintData;
List <Image> dbfpList = new List <Image>();
try
{
foreach (string db in dbList)
{
EncryptionService.decryptFingerprintData(PHN, keyword, db, out dbFpData);
dbfpList.Add(FingerprintService.byteToImg(dbFpData));
}
EncryptionService.getPrivateKeyFromIDKeyword(PHN, keyword, userAsset.data.Data.PrivateKeys, out patientSignPrivateKey, out patientAgreePrivateKey);
}
catch
{
ModelState.AddModelError("", "Keyword may be incorrect");
return(View(fillPrescriptionViewModel));
}
// Compare the scanned fingerprint with the one saved in the database
if (!FingerprintService.compareFP(fpImg, dbfpList))
{
ModelState.AddModelError("", "The fingerprint did not match, try again.");
return(View(fillPrescriptionViewModel));
}
var prescriptionData = _bigChainDbService.GetMetaDataAndAssetFromTransactionId <string, PrescriptionMetadata>
(fillPrescriptionViewModel.PrescriptionData.transID);
var oldMetadata = prescriptionData.metadata;
if (fillPrescriptionViewModel.PrescriptionData.assetData.EndDate.CompareTo(DateTime.Now) < 0)
{
ModelState.AddModelError("", "The Prescription seems to have expired. Cannot fill this prescription.");
return(View(fillPrescriptionViewModel));
}
if (fillPrescriptionViewModel.PrescriptionData.Metadata.RefillRemaining < fillPrescriptionViewModel.QtyFilled)
{
ModelState.AddModelError("", "Connot issue more than remaining refills.");
}
MetaDataSaved <PrescriptionMetadata> newMetadata = oldMetadata;
newMetadata.data.LastIssueQty = fillPrescriptionViewModel.QtyFilled;
newMetadata.data.LastIssueDate = DateTime.Now;
newMetadata.data.RefillRemaining = fillPrescriptionViewModel.PrescriptionData.Metadata.RefillRemaining - fillPrescriptionViewModel.QtyFilled;
_bigChainDbService.SendTransferTransactionToDataBase <PrescriptionMetadata>(fillPrescriptionViewModel.PrescriptionData.assetID,
newMetadata, patientSignPrivateKey, patientSignPublicKey, fillPrescriptionViewModel.PrescriptionData.transID);
return(RedirectToAction("PatientRecords"));
}
