Code styles

@doc.summary('Update engagement by ID')
    @doc.consumes(EngagementUpdateBody, location='body')
    @doc.consumes(XClientHeader, location='header')
    @last_modified('match_info', 'engagement_id')
    async def patch(self, request, engagement_id):
        """HTTP PATCH method for Engagement update.

        Args:
            request (sanic.request.Request): Request object that should contain X-Client header.
            engagement_id (str): String representation of the MongoDB engagement
            document id.

        Returns:
            sanic.response.HTTPResponse object with engagement document data:
                {
                    "data": {"isUpdated": True or False},
                    "response_datetime": "2019-01-24T11:35:02.078577",
                    "status": "success"
                }

        Raises:
            sanic.exceptions.InvalidUsage: If request doesn't contains X-Client header.

        """
        try:
            await parser.parse(EngagementUpdateSchema(strict=True), request, locations=('headers', "json"))
        except Exception as e:
            print(e)

        controller = request.app.controllers.EngagementsController
        is_update_template = request.json.get('uploadTemplateId')
        is_with_option_wizard = 'entities' in request.json
        user_data = await self.get_session_data(request)
        user_id = user_data.get("useracct_id")
        force_update = util.strtobool(request.args.get('force_update', 'False'))
        if is_update_template or force_update or not is_with_option_wizard:
            result = await controller.patch_upload_template_by_engagement(request, engagement_id, user_id=user_id)
        else:
            if not request.json.get('entities'):
                raise BadRequestError("The field 'entities' is empty - there is must be at least one entity")
            result = await controller.patch_engagement_by_id(request, engagement_id)
        return self.get_response(result)




@doc.summary('Update engagement by ID')
    @doc.consumes(EngagementUpdateBody, location='body')
    @doc.consumes(XClientHeader, location='header')
    @last_modified('match_info', 'engagement_id')
    async def patch(self, request, engagement_id):
        """HTTP PATCH method for Engagement update.

        Args:
            request (sanic.request.Request): Request object that should contain X-Client header.
            engagement_id (str): String representation of the MongoDB engagement
            document id.

        Returns:
            sanic.response.HTTPResponse object with engagement document data:
                {
                    "data": {"isUpdated": True or False},
                    "response_datetime": "2019-01-24T11:35:02.078577",
                    "status": "success"
                }

        Raises:
            sanic.exceptions.InvalidUsage: If request doesn't contains X-Client header.

        """
        try:
            await parser.parse(EngagementUpdateSchema(strict=True),
                               request,
                               locations=('headers', "json"))
        except Exception as e:
            print(e)

        controller = request.app.controllers.EngagementsController
        request_data = await self.get_session_data(request)
        user_id = request_data.get("useracct_id")

        if not self.is_update_engagement(request_data):
            result = await controller.patch_upload_template_by_engagement(
                request,
                engagement_id,
                user_id=user_id
            )
        else:
            result = await controller.patch_engagement_by_id(request, engagement_id)

        return self.get_response(result)

    @staticmethod
    def is_update_engagement(request_data: dict) -> bool:
        is_with_optional_wizard = "entities" in request_data
        is_upload_template = request_data.get("uploadTemplateId", False)
        force_update = util.strtobool(request_data.get("force_update", "False"))

        if is_upload_template or force_update or not is_with_optional_wizard:
            return False

        if not request_data.get('entities'):
            raise BadRequestError(
                "The field 'entities' is empty - there is must be at least one entity"
            )

        return True