added server-side endpoint for CO2Data

caimira/apps/calculator/__init__.py

@@ -26,7 +26,7 @@ from tornado.httpclient import AsyncHTTPClient, HTTPRequest
 import tornado.log
 
 from . import markdown_tools
-from . import model_generator
+from . import model_generator, co2_model_generator
 from .report_generator import ReportGenerator, calculate_report_data
 from .user import AuthenticatedUser, AnonymousUser
 
@@ -340,7 +340,40 @@ class GenericExtraPage(BaseRequestHandler):
             active_page=self.active_page,
             text_blocks=template_environment.globals["common_text"]
         ))
+        
 
+class CO2Data(BaseRequestHandler):
+    def check_xsrf_cookie(self):
+        """
+        This request handler implements a stateless API that returns report data in JSON format.
+        Thus, XSRF cookies are disabled by overriding base class implementation of this method with a pass statement.
+        """
+        pass
+    
+    async def post(self) -> None:
+        requested_model_config = tornado.escape.json_decode(self.request.body)
+        
+        try:
+            form = co2_model_generator.CO2FormData.from_dict(requested_model_config)
+        except Exception as err:
+            if self.settings.get("debug", False):
+                import traceback
+                print(traceback.format_exc())
+            response_json = {'code': 400, 'error': f'Your request was invalid {html.escape(str(err))}'}
+            self.set_status(400)
+            self.finish(json.dumps(response_json))
+            return
+
+        executor = loky.get_reusable_executor(
+            max_workers=self.settings['handler_worker_pool_size'],
+            timeout=300,
+        )
+        report_task = executor.submit(
+            co2_model_generator.CO2FormData.build_model, form,
+        )
+        report: str = await asyncio.wrap_future(report_task)
+        self.finish(dict(report.CO2_fit_params()))
+     
 
 def get_url(app_root: str, relative_path: str = '/'):
         return app_root.rstrip('/') + relative_path.rstrip('/')
@@ -363,6 +396,7 @@ def make_app(
     base_urls: typing.List = [
         (get_root_url(r'/?'), LandingPage),
         (get_root_calculator_url(r'/?'), CalculatorForm),
+        (get_root_calculator_url(r'/co2-fit/'), CO2Data),
         (get_root_calculator_url(r'/report'), ConcentrationModel),
         (get_root_url(r'/static/(.*)'), StaticFileHandler, {'path': static_dir}),
         (get_root_calculator_url(r'/static/(.*)'), StaticFileHandler, {'path': calculator_static_dir}),