// Let's request the conformance statement from the SMART on FHIR API server and
// find out the endpoint URLs for the authorization server
//public ActionResult FraminghamCalculator(CernerFullConnectionInformationViewModel cfcivm) //Models.ViewModels.Patient viewPatient)
public FraminghamCalculatorViewModel FraminghamCalculator(CernerFullConnectionInformationViewModel cfcivm) //Models.ViewModels.Patient viewPatient)
{
ViewBag.Message = "Framingham Calculator";
var client = new FhirClient(cfcivm.ServiceUrl)
{
PreferredFormat = ResourceFormat.Json
};;
client.OnBeforeRequest += (object sender, BeforeRequestEventArgs e) =>
{
e.RawRequest.Headers.Add("Authorization", "Bearer " + cfcivm.AccessToken);
};
var identity = ResourceIdentity.Build("Patient", cfcivm.PatientId);
Hl7.Fhir.Model.Patient viewPatient = client.Read <Hl7.Fhir.Model.Patient>(identity);
//Get those values we don't know how to retrive yet.
FraminghamCalculatorPatient Fcp = PhillFCM(0);
Fcp.LastName = viewPatient.Name[viewPatient.Name.Count - 1].FamilyElement[0].ToString();
Fcp.FirstName = viewPatient.Name[viewPatient.Name.Count - 1].GivenElement[0].ToString();
Fcp.Gender = viewPatient.Gender.ToString();
Fcp.Age = Convert.ToDateTime(viewPatient.BirthDate).Age();
#region Get HDL
//Now we get some real data like the HDL
FraminghamCalculator fc = new FraminghamCalculator(Fcp);
fc.FhirClient = client;
string loinc_hdl = "2085-9";
string loinc_ldl = "13457-7";
string loinc_Cholesterol_Total = "9830-1";
string loinc_cholesterol = "2093-3";
string loinc_Triglycerides = "2571-8";
string loinc_SystolicBP = "8480-6";
string loinc_DiastolicBP = "8462-4";
BloodPressureValue bpv = fc.GetLatestBloodPressureValue(cfcivm.PatientId, loinc_SystolicBP);
CholesterolValue cv_hdl = fc.GetLatestCholesterolValue(cfcivm.PatientId, loinc_hdl);
CholesterolValue cv_total = fc.GetLatestCholesterolValue(cfcivm.PatientId, loinc_cholesterol);
#endregion Get HDL
Fcp.SystolicBP = (int)bpv.Value;
Fcp.HDL = (int)cv_hdl.Value;
Fcp.TotalCholesterol = (int)cv_total.Value;
FraminghamCalculatorViewModel vm = new FraminghamCalculatorViewModel();
vm.FraminghamScore = fc.DoCalculation();
vm.FCM = Fcp;
return(vm);
}
public BloodPressureValue GetLatestBloodPressureValue(string patientId, string loinc_BloodPressureType)
{
//Loinc code is made up of the url to the source as well as the code number itself.
string loinc_path = loinc_Url + loinc_BloodPressureType;
var query = new string[] { string.Format("patient={0}", patientId), string.Format("code={0}", loinc_path) };
var myObservations = FhirClient.Search <Observation>(query);
List <BloodPressureValue> valuesList = new List <BloodPressureValue>();
//Here we get all of the selected observations they'll let us have.
// Fhir is supposed to use pagination so we should only get a limited set of what's available.
// I'm assuming, for some reason, that the first ones to show up are the latest ones.
foreach (Bundle.EntryComponent entry in myObservations.Entry)
{
BloodPressureValue bloodPressureValue = new BloodPressureValue();
Observation myObservation = (Hl7.Fhir.Model.Observation)entry.Resource;
var myComponents = myObservation.Component;
//We have the observation entry. Now we have to pull the Systolic value out of that.
foreach (var myCode in myComponents)
{
if (myCode.Code.Coding.FirstOrDefault <Coding>().Code.ToString() == loinc_BloodPressureType)
{
SimpleQuantity mySimpleQuantity = (Hl7.Fhir.Model.SimpleQuantity)myCode.Value;
var bpValue = mySimpleQuantity.Value;
bloodPressureValue.Value = bpValue;
bloodPressureValue.IssuedDate = myObservation.Issued.Value.DateTime;
bloodPressureValue.BloodPressureType = loinc_BloodPressureType;
valuesList.Add(bloodPressureValue);
}
valuesList.Add(bloodPressureValue);
}
}
//Sort by the issued date so the most recent is on the top and then select that one.
return(valuesList.OrderByDescending(a => a.IssuedDate).FirstOrDefault());
}
