private static async Task RuleDataAsync(FhirR4Client fhirClient)
{
var srchParams = new SearchParams()
.Where("title=All Labs")
.LimitTo(10)
.SummaryOnly()
.OrderBy("title",
SortOrder.Descending);
var bundle = fhirClient.Search <FhirModel4.List>(srchParams);
var list = bundle.Entry.FirstOrDefault()?.Resource as FhirModel4.List;
if (list != null)
{
var listResource = fhirClient.Read <FhirModel4.List>(ResourceIdentity.Build("List", list.Id));
Console.WriteLine($"List Summary Narrative: {listResource.Text.Div}");
var tasks = new List <Task <FhirModel4.Patient> >();
foreach (var entryComponent in listResource.Entry)
{
var resourceReference = entryComponent.Item;
tasks.Add(fhirClient.ReadAsync <FhirModel4.Patient>(resourceReference.Url));
}
await Task.WhenAll(tasks);
foreach (var task in tasks)
{
var patient = task.Result;
Console.WriteLine(
$"NAME: {patient.Name[ 0 ].Given.FirstOrDefault()} {patient.Name[ 0 ].Family.FirstOrDefault()}");
}
}
}
private static void FetchClaims(FhirR4Client fhirClient, string [] query)
{
var result = fhirClient.Search <FhirModel4.Claim>(query, null, 50);
Console.WriteLine($"total claims = " + result.Total);
while (result != null)
{
foreach (var e in result.Entry)
{
var claim = (FhirModel4.Claim)e.Resource;
var diagnosis = (claim.Diagnosis.FirstOrDefault()?.Diagnosis as FhirModel.CodeableConcept)?.Coding.FirstOrDefault()?.Code;
Console.WriteLine(
$"Claim Diagnosis: { diagnosis }");
var service = (claim.Item.FirstOrDefault()?.ProductOrService as FhirModel.CodeableConcept)?.Coding.FirstOrDefault()?.Code;
Console.WriteLine($"Service: { service }");
var status = claim.Status;
if (status != null)
{
Console.WriteLine(
$"Claim Status: {((FhirModel.FinancialResourceStatusCodes)status).GetLiteral() }");
}
}
Console.WriteLine("Fetching more results...");
result = fhirClient.Continue(result);
}
Console.WriteLine("No more claims.");
}
static void Main(string[] args)
{
/*
* Authentication requirements to obtain an access token:
*
* - see https://fhir.docs.careevolution.com/overview/authentication.html
*
* The example code below illustrates how to:
*
* using FhirClient:
* 1. search for patients
* 2. post a resource (DiagnosticReport) for an existing patient
* 3. use a FHIR transaction( http://hl7.org/fhir/R4/http.html#transaction ) to POST a FHIR bundle containing
* a DiagnosticReport resource + its Patient resource.
* 4. read a patient resource, search for claims. search for diagnostic reports and read contained observations
* 5. async calls to get rule data and patients
*
* using HttpClient and json string:
* 1. POST the DiagnosticReport resource json string to FhirEndpoint .../api/fhir/DiagnosticReport
*
*/
var fhirEndPoint = FhirServer + "api/fhir-r4";
var fhirClient = new FhirR4Client(fhirEndPoint);
var conformance = fhirClient.Metadata();
var tokenEndpoint = conformance.Rest[0].Security.Extension[0].Extension.FirstOrDefault(e => e.Url.Equals("token"))?.Value;
var accessToken = AccessTokenHelper.GetAccessToken(FhirServer, tokenEndpoint?.ToString());
fhirClient.OnBeforeRequest += (object sender, BeforeRequestEventArgs eventArgs) =>
{
eventArgs.RawRequest.Headers.Add("Authorization", $"Bearer {accessToken}");
};
fhirClient.OnAfterResponse += (object sender, AfterResponseEventArgs e) =>
{
Console.WriteLine("Received response with status: " + e.RawResponse.StatusCode);
};
var patients = GetPatients(fhirClient, "TestFhirPost");
PostDiagnosticReportForExistingPatient(fhirClient, patients);
var patient = PostDiagnosticReportForNewPatient(fhirClient);
PostJsonReport(accessToken, fhirEndPoint, patient.Id);
PatientData(fhirClient);
RuleDataAsync(fhirClient).Wait();
Console.WriteLine("All done.");
Console.ReadLine();
}
private static List <FhirModel4.Patient> GetPatients(FhirR4Client fhirClient, string family)
{
var srch = new SearchParams()
.Where($"family={family}")
.LimitTo(20)
.SummaryOnly()
.OrderBy("birthdate",
SortOrder.Descending);
var bundle = fhirClient.Search <FhirModel4.Patient>(srch);
return(bundle.Entry.Select(b => b.Resource as FhirModel4.Patient).ToList());
}
private static void PostDiagnosticReportForExistingPatient(FhirR4Client fhirClient, List <FhirModel4.Patient> patients)
{
foreach (var patient in patients)
{
var writeable = patient.Identifier.Any(i => i.System == FhirIdSystem);
if (!writeable)
{
continue;
}
var report = CreateReport(DateTimeOffset.Now);
report.Subject = new FhirModel.ResourceReference
{
Reference = "Patient/" + patient.Id
};
var createdReport = fhirClient.Create(report);
Console.WriteLine($"Diagnostic Report Posted. New Resource Reference = DiagnosticReport/" + createdReport.Id);
}
}
// post via fhir rest client using bundle transaction returns location url with newly created ID's.
private static FhirModel4.Patient PostDiagnosticReportForNewPatient(FhirR4Client fhirClient)
{
var patientIdentifier = Guid.NewGuid().ToString();
var patient = CreatePatient(patientIdentifier);
var report = CreateReport(DateTimeOffset.Now);
// create bundle transaction
var bundle = new FhirModel4.Bundle {
Type = FhirModel.BundleType.Transaction
};
var patientEntry = CreateTransactionBundleEntry(patient, "Patient", FhirModel.HTTPVerb.POST);
report.Subject = new FhirModel.ResourceReference(patientEntry.FullUrl);
var reportEntry = CreateTransactionBundleEntry(report, "DiagnosticReport", FhirModel.HTTPVerb.POST);
bundle.Entry.Add(patientEntry);
bundle.Entry.Add(reportEntry);
var bundleResponse = fhirClient.Transaction(bundle);
foreach (var bundleResponseEntry in bundleResponse.Entry)
{
Console.WriteLine("response status = " + bundleResponseEntry.Response.Status);
Console.WriteLine("location = " + bundleResponseEntry.Response.Location);
var resource = fhirClient.Get(bundleResponseEntry.Response.Location);
if (resource is FhirModel4.Patient)
{
patient = (FhirModel4.Patient)resource;
}
else if (resource is FhirModel4.DiagnosticReport)
{
report = (FhirModel4.DiagnosticReport)resource;
}
}
return(patient);
}
private static void FetchDiagnosticReports(FhirR4Client fhirClient, string[] query)
{
var result = fhirClient.Search <FhirModel4.DiagnosticReport>(query, null, 50);
Console.WriteLine($"total reports = " + result.Total);
while (result != null)
{
foreach (var e in result.Entry)
{
var report = (FhirModel4.DiagnosticReport)e.Resource;
Console.WriteLine($"Report LastUpdated: {report.Meta.LastUpdated}");
Console.WriteLine($"Report Status: {report.Status}");
Console.WriteLine($"Report Category: {report.Category.FirstOrDefault()?.Coding.FirstOrDefault()?.Display}");
var observations = report.Result;
foreach (var resourceReference in observations)
{
var resource = fhirClient.Read <FhirModel4.Observation>(resourceReference.Url);
Console.WriteLine($"Observation date: {resource.Effective}");
if (resource.Value is FhirModel.Quantity)
{
var value = (FhirModel.Quantity)resource.Value;
Console.WriteLine($"Observation value: {value.Value}");
Console.WriteLine($"Observation units: {value.Unit}");
}
else
{
Console.WriteLine($"Observation value: {(( FhirModel.FhirString )resource.Value ).Value}");
}
}
}
Console.WriteLine("Fetching more results...");
result = fhirClient.Continue(result);
}
Console.WriteLine("No more reports.");
}
private static void PatientData(FhirR4Client fhirClient)
{
// search for patient as we don't have a patient ID
var patients = GetPatients(fhirClient, "JEPPESEN");
if (!patients.Any())
{
return;
}
var patientResource = fhirClient.Read <FhirModel4.Patient>(ResourceIdentity.Build("Patient", patients.FirstOrDefault()?.Id));
Console.WriteLine($" patient name =" + patientResource.Name.FirstOrDefault());
Console.WriteLine($" patient birthdate =" + patientResource.BirthDate);
Console.WriteLine($" patient gender =" + patientResource.Gender);
var query = new string[] { $"patient._id={patientResource.Id}" };
FetchClaims(fhirClient, query);
FetchDiagnosticReports(fhirClient, query);
}
