Create app.py

app.py

@@ -0,0 +1,92 @@
+import streamlit as st
+import pandas as pd
+from fhirclient import client
+from fhir.resources import (patient as fhirpatient, 
+                            observation as fhirobservation)
+
+import settings
+
+#pip install fhir.resources fhirclient
+
+from fhirclient.models import (client as fhirclient, 
+                               bundle as fhirbundle, 
+                               patient as fhirpatient)
+
+settings = {
+    'app_id': 'my_app',
+    'api_base': 'https://hapi.fhir.org/baseR4',
+    'redirect_uri': 'http://localhost:8000/callback',
+    'scope': 'launch/patient openid fhirUser',
+    'client_secret': 'my_app_secret'
+}
+
+
+def bmi_calculator(height, weight):
+    bmi = weight / ((height/100)**2)
+    return bmi
+
+def get_patient_data(client):
+    patient = fhirpatient.Patient.read('self', client.server)
+    
+    # Get the patient's weight and height observations
+    weight_obs = client.server.request(fhirobservation.Observation
+                                        .where({'subject': f'Patient/{patient.id}', 
+                                                'code': '29463-7'}))
+    height_obs = client.server.request(fhirobservation.Observation
+                                        .where({'subject': f'Patient/{patient.id}', 
+                                                'code': '8302-2'}))
+    
+    # Get the latest weight and height values
+    weight = float(weight_obs.entry[-1].resource.valueQuantity.value)
+    height = float(height_obs.entry[-1].resource.valueQuantity.value)
+    
+    return height, weight
+
+smart = client.FHIRClient(settings=settings.settings)
+
+st.title("BMI Calculator")
+
+if smart.ready:
+    st.write("SMART on FHIR connection successful!")
+    st.write("Loading patient data...")
+    height, weight = get_patient_data(smart)
+    st.write("Patient height:", height, "cm")
+    st.write("Patient weight:", weight, "kg")
+    st.write("Calculating BMI...")
+    bmi = bmi_calculator(height, weight)
+    st.write("Your BMI is:", round(bmi, 2))
+    
+    if bmi < 18.5:
+        st.write("You are underweight.")
+    elif bmi >= 18.5 and bmi < 25:
+        st.write("You have a healthy weight.")
+    elif bmi >= 25 and bmi < 30:
+        st.write("You are overweight.")
+    else:
+        st.write("You are obese.")
+else:
+    st.write("SMART on FHIR connection failed. Please check your app settings.")
+
+
+st.markdown("""
+There are several public SMART on FHIR test servers available that allow for public access:
+
+## HAPI FHIR Public Test Server: 
+This is a free, public test server that allows users to test their FHIR apps. 
+The server is available at the following 
+URL: 
+https://hapi.fhir.org/baseR4
+
+## SMART Health IT Sandbox: This is a free, public sandbox environment that allows users to test their SMART on FHIR apps. 
+The sandbox is available at the following 
+URL: 
+https://sandbox.smarthealthit.org
+
+## Argonaut Project Test Server: This is a public test server that is maintained by the Argonaut Project, 
+an initiative to accelerate the development and adoption of FHIR. 
+The server is available at the following 
+URL: 
+http://argonaut.healthintersections.com.au
+
+
+""")