Merge branch 'feature/WP3_first_integration' into 'master'

Developed server side API connection to Service Data (WP3)

See merge request caimira/caimira!453

app-config/calculator-app/app.sh

@@ -23,6 +23,9 @@ if [[ "$APP_NAME" == "calculator-app" ]]; then
 
     export "EXTRA_PAGES"="$EXTRA_PAGES"
 
+    export "DATA_SERVICE_CLIENT_EMAIL"="$DATA_SERVICE_CLIENT_EMAIL"
+    export "DATA_SERVICE_CLIENT_PASSWORD"="$DATA_SERVICE_CLIENT_PASSWORD"
+
     echo "Starting the caimira webservice with: python -m caimira.apps.calculator ${args[@]}"
     python -m caimira.apps.calculator "${args[@]}"
 elif [[ "$APP_NAME" == "caimira-voila" ]]; then

caimira/apps/calculator/__init__.py

@@ -19,7 +19,6 @@
 import uuid
 import zlib
 
-
 import jinja2
 import loky
 from tornado.web import Application, RequestHandler, StaticFileHandler
@@ -29,6 +28,7 @@
 from . import markdown_tools
 from . import model_generator
 from .report_generator import ReportGenerator, calculate_report_data
+from .data_service import DataService
 from .user import AuthenticatedUser, AnonymousUser
 
 # The calculator version is based on a combination of the model version and the
@@ -38,12 +38,13 @@
 # calculator version. If the calculator needs to make breaking changes (e.g. change
 # form attributes) then it can also increase its MAJOR version without needing to
 # increase the overall CAiMIRA version (found at ``caimira.__version__``).
-__version__ = "4.11"
+__version__ = "4.12"
 
 LOG = logging.getLogger(__name__)
-
+    
 
 class BaseRequestHandler(RequestHandler):
+
     async def prepare(self):
         """Called at the beginning of a request before  `get`/`post`/etc."""
 
@@ -104,7 +105,17 @@ async def post(self) -> None:
             from pprint import pprint
             pprint(requested_model_config)
             start = datetime.datetime.now()
-
+
+        # Data Service API Integration
+        data_service: DataService = self.settings["data_service"]
+        try:
+            access_token = await data_service.login()
+            service_data = await data_service.fetch(access_token)
+        except Exception as err:
+            error_message = f"Something went wrong with the data service: {str(err)}"
+            LOG.error(error_message, exc_info=True)
+            self.send_error(500, reason=error_message)
+
         try:
             form = model_generator.FormData.from_dict(requested_model_config)
         except Exception as err:
@@ -417,6 +428,11 @@ def make_app(
     )
     template_environment.globals['get_url']=get_root_url
     template_environment.globals['get_calculator_url']=get_root_calculator_url
+
+    data_service_credentials = {
+        'data_service_client_email': os.environ.get('DATA_SERVICE_CLIENT_EMAIL', None),
+        'data_service_client_password': os.environ.get('DATA_SERVICE_CLIENT_PASSWORD', None),
+    }
 
     if debug:
         tornado.log.enable_pretty_logging()
@@ -435,6 +451,9 @@ def make_app(
         arve_client_secret=os.environ.get('ARVE_CLIENT_SECRET', None),
         arve_api_key=os.environ.get('ARVE_API_KEY', None),
 
+        # Data Service Integration
+        data_service = DataService(data_service_credentials), 
+
         # Process parallelism controls. There is a balance between serving a single report
         # requests quickly or serving multiple requests concurrently.
         # The defaults are: handle one report at a time, and allow parallelism

caimira/apps/calculator/data_service.py

@@ -0,0 +1,58 @@
+import dataclasses
+import json
+import logging
+
+from tornado.httpclient import AsyncHTTPClient, HTTPRequest
+
+LOG = logging.getLogger(__name__)
+
+
+@dataclasses.dataclass
+class DataService():
+    '''
+    Responsible for establishing a connection to a 
+    database through a REST API by handling authentication 
+    and fetching data. It utilizes the Tornado web framework
+    for asynchronous HTTP requests.
+    '''
+    # Credentials used for authentication
+    credentials: dict
+
+    # Host URL for the CAiMIRA Data Service API
+    host: str = 'https://caimira-data-api.app.cern.ch'
+
+    async def login(self):
+        client_email = self.credentials["data_service_client_email"]
+        client_password = self.credentials['data_service_client_password']
+
+        if (client_email == None or client_password == None):
+            # If the credentials are not defined, an exception is raised.
+            raise Exception("DataService credentials not set")
+
+        http_client = AsyncHTTPClient()
+        headers = {'Content-type': 'application/json'}
+        json_body = { "email": f"{client_email}", "password": f"{client_password}"}
+
+        response = await http_client.fetch(HTTPRequest(
+            url=self.host + '/login',
+            method='POST',
+            headers=headers,
+            body=json.dumps(json_body),
+        ),
+        raise_error=True)
+
+        return json.loads(response.body)['access_token']
+
+    async def fetch(self, access_token: str):
+        http_client = AsyncHTTPClient()
+        headers = {'Authorization': f'Bearer {access_token}'}
+
+        response = await http_client.fetch(HTTPRequest(
+            url=self.host + '/data',
+            method='GET',
+            headers=headers,
+        ),
+        raise_error=True)
+
+        return json.loads(response.body)
+

caimira/tests/test_data_service.py

@@ -0,0 +1,87 @@
+from dataclasses import dataclass
+
+import unittest
+from unittest.mock import patch, MagicMock
+from tornado.httpclient import HTTPError
+
+from caimira.apps.calculator.data_service import DataService
+
+@dataclass
+class MockResponse:
+    body: str
+
+class DataServiceTests(unittest.TestCase):
+    def setUp(self):
+        # Set up any necessary test data or configurations
+        self.credentials = {
+            "data_service_client_email": "[email protected]",
+            "data_service_client_password": "password123"
+        }
+        self.data_service = DataService(self.credentials)
+
+    @patch('caimira.apps.calculator.data_service.AsyncHTTPClient')
+    async def test_login_successful(self, mock_http_client):
+        # Mock successful login response
+        mock_response = MockResponse('{"access_token": "dummy_token"}')
+        mock_fetch = MagicMock(return_value=mock_response)
+        mock_http_client.return_value.fetch = mock_fetch
+
+        # Call the login method
+        access_token = await self.data_service.login()
+
+        # Assert that the access token is returned correctly
+        self.assertEqual(access_token, "dummy_token")
+
+        # Verify that the fetch method was called with the expected arguments
+        mock_fetch.assert_called_once_with(
+            url='https://caimira-data-api.app.cern.ch/login',
+            method='POST',
+            headers={'Content-type': 'application/json'},
+            body='{"email": "[email protected]", "password": "password123"}'
+        )
+
+    @patch('caimira.apps.calculator.data_service.AsyncHTTPClient')
+    async def test_login_error(self, mock_http_client):
+        # Mock login error response
+        mock_fetch = MagicMock(side_effect=HTTPError(500))
+        mock_http_client.return_value.fetch = mock_fetch
+
+        # Call the login method
+        access_token = await self.data_service.login()
+
+        # Assert that the login method returns None in case of an error
+        self.assertIsNone(access_token)
+
+    @patch('caimira.apps.calculator.data_service.AsyncHTTPClient')
+    async def test_fetch_successful(self, mock_http_client):
+        # Mock successful fetch response
+        mock_response = MockResponse('{"data": "dummy_data"}')
+        mock_fetch = MagicMock(return_value=mock_response)
+        mock_http_client.return_value.fetch = mock_fetch
+
+        # Call the fetch method with a mock access token
+        access_token = "dummy_token"
+        data = await self.data_service.fetch(access_token)
+
+        # Assert that the data is returned correctly
+        self.assertEqual(data, {"data": "dummy_data"})
+
+        # Verify that the fetch method was called with the expected arguments
+        mock_fetch.assert_called_once_with(
+            url='https://caimira-data-api.app.cern.ch/data',
+            method='GET',
+            headers={'Authorization': 'Bearer dummy_token'}
+        )
+
+    @patch('caimira.apps.calculator.data_service.AsyncHTTPClient')
+    async def test_fetch_error(self, mock_http_client):
+        # Mock fetch error response
+        mock_fetch = MagicMock(side_effect=HTTPError(404))
+        mock_http_client.return_value.fetch = mock_fetch
+
+        # Call the fetch method with a mock access token
+        access_token = "dummy_token"
+        data = await self.data_service.fetch(access_token)
+
+        # Assert that the fetch method returns None in case of an error
+        self.assertIsNone(data)