code cleanup, use SDK.

Author: JAMES FUQIAN

README.md

@@ -25,12 +25,11 @@ Running the Back-end & Front-end
 
 Once Docker and Python are Installed then do the following:
 
-    copy server/src/configs/sample_config.py -> server/src/configs/config.py
+    cp server/sample-bluebutton-config.py server/.bluebutton-config.py
 
-Make sure to replace the clientId and clientSecret variables within the config file with
-the ones you were provided, for your application, when you created your Blue Button Sandbox account.
-
-    copy server/src/prestart/env/sandbox.sample.env -> server/src/prestart/env/development.env
+Make sure to replace the client_id and client_secret variables within the config file with
+the ones you were provided, for your application, when you created your Blue Button Sandbox account,
+the supported environments are SANDBOX or PRODUCTION.
 
     docker-compose up -d
 
@@ -51,9 +50,9 @@ data would be:  BBUser29999 (PWD: PW29999!) or BBUser29998 (PWD: PW29998!)
 
 Development
 -----------
-Read the DEVELOPER NOTES found in the code to understand the application
-and where you will need to make adjustments/changes as well as some 
-suggestions for best practices.
+Read the comments in the code to understand the application and where
+you will need to make adjustments/changes as well as some suggestions
+for best practices.
 
 Debugging server component
 --------------------------

server/Dockerfile

@@ -5,17 +5,16 @@ LABEL description="Demo of a Medicare claims data sample app"
 
 WORKDIR /server
 
-COPY ["./src/configs/sample_config.py", "./src/configs/config.py"]
-COPY ["./src/prestart/env/sandbox.sample.env","./src/prestart/env/development.env"]
+# COPY ["./src/configs/sample_config.py", "./src/configs/config.py"]
+# COPY ["./src/prestart/env/sandbox.sample.env","./src/prestart/env/development.env"]
 
 COPY . . 
 
-RUN pip install pipenv
-RUN pip install debugpy
+RUN pip install pipenv debugpy ./cms_bluebutton_sdk-1.0.0-py3-none-any.whl
 RUN pipenv install --system --deploy --ignore-pipfile
 
-ENV ENV "development"
+# ENV ENV "development"
 
 EXPOSE 3001
 
-CMD ["sh", "-c", "python -m debugpy --listen 0.0.0.0:5678 run.py --ENV ${ENV}"]
+CMD ["sh", "-c", "python -m debugpy --listen 0.0.0.0:5678 app.py"]

server/Pipfile

@@ -5,10 +5,6 @@ name = "pypi"
 
 [packages]
 flask = "*"
-requests = "*"
-argparse = "*"
-requests-toolbelt = "*"
-python-dotenv = "*"
 
 [dev-packages]
 

server/Pipfile.lock

@@ -0,0 +1,99 @@
+import os
+
+from flask import redirect, request, Flask
+from cms_bluebutton.cms_bluebutton import BlueButton
+
+
+app = Flask(__name__)
+bb = BlueButton()
+
+# This is where medicare.gov beneficiary associated
+# with the current logged in app user,
+# in real app, this could be the app specific
+# accoount management system
+loggedInUser = {
+    'authToken': None,
+    'eobData': None
+}
+
+auth_data = bb.generate_auth_data()
+
+# AuthorizationToken holds access grant info:
+# access token, expire in, expire at, token type, scope, refreh token, etc.
+# it is associated with current logged in user in real app,
+# check SDK python docs for more details.
+
+auth_token = None
+
+
+@app.route('/api/authorize/authurl', methods=['GET'])
+def get_auth_url():
+    redirect_url = bb.generate_authorize_url(auth_data)
+    return redirect_url
+
+
+@app.route('/api/bluebutton/callback/', methods=['GET'])
+def authorization_callback():
+    request_query = request.args
+    code = request_query.get('code')
+    state = request_query.get('state')
+
+    auth_token = bb.get_authorization_token(auth_data, code, state)
+
+    # correlate app user with medicare bene
+    loggedInUser['authToken'] = auth_token
+
+    config = {
+        "auth_token": auth_token,
+        "params": {},
+        "url": "to be overriden"
+    }
+
+    # result = {}
+
+    try:
+        # search eob
+
+        eob_data = bb.get_explaination_of_benefit_data(config)
+
+        # fhir search response could contain large number of resources,
+        # by default they are chunked into pages of 10 resources each,
+        # the response above might be the 1st page of EOBs, it is in
+        # the format of a FHIR bundle resource with a link section where
+        # page navigation urls such as 'first', 'last', 'self', 'next',
+        # 'previous' might present depending on the current page.
+        # Use bb.get_pages(data, config) to get all the pages
+
+        auth_token = eob_data['auth_token']
+        loggedInUser['authToken'] = auth_token
+        loggedInUser['eobData'] = eob_data['response'].json()
+    except Exception as ex:
+        print(ex)
+
+    return redirect(get_fe_redirect_url())
+
+
+@app.route('/api/data/benefit', methods=['GET'])
+def get_patient_eob():
+    """
+    * this function is used directly by the front-end to
+    * retrieve eob data from the logged in user from within the mocked DB
+    * This would be replaced by a persistence service layer for whatever
+    *  DB you would choose to use
+    """
+    if loggedInUser and loggedInUser.get('eobData'):
+        return loggedInUser.get('eobData')
+    else:
+        return {}
+
+
+def get_fe_redirect_url():
+    '''
+    helper to figure out the correct front end redirect url per context
+    '''
+    is_selenium = os.getenv('SELENIUM_TESTS', 'False').lower() in ('true')
+    return 'http://client:3000' if is_selenium else 'http://localhost:3000'
+
+
+if __name__ == '__main__':
+    app.run(debug=True, host='0.0.0.0', port=3001)

server/app.py

@@ -0,0 +1,12 @@
+{
+    "environment": "SANDBOX",
+    "client_id": "<client_id>",
+    "client_secret": "<client_secret>",
+    "callback_url": "http://localhost:3001/api/bluebutton/callback/",
+    "version": 2,
+    "retry_settings": {
+        "total": 3,
+        "backoff_factor": 5,
+        "status_forcelist": [500, 502, 503, 504]
+    }
+}