def on_before_transform_resource()

in samtranslator/plugins/application/serverless_app_plugin.py [0:0]

• 32 lines of code
• 9 McCabe index (conditional complexity)

    def on_before_transform_resource(self, logical_id, resource_type, resource_properties):  # type: ignore[no-untyped-def]
        """
        Hook method that gets called before "each" SAM resource gets processed

        Replaces the ApplicationId and Semantic Version pairs with a TemplateUrl.

        :param string logical_id: Logical ID of the resource being processed
        :param string resource_type: Type of the resource being processed
        :param dict resource_properties: Properties of the resource
        """

        if not self._resource_is_supported(resource_type):  # type: ignore[no-untyped-call]
            return

        # Sanitize properties
        self._check_for_dictionary_key(logical_id, resource_properties, [self.LOCATION_KEY])  # type: ignore[no-untyped-call]

        # If location isn't a dictionary, don't modify the resource.
        if not isinstance(resource_properties[self.LOCATION_KEY], dict):
            resource_properties[self.TEMPLATE_URL_KEY] = resource_properties[self.LOCATION_KEY]
            return

        # If it is a dictionary, check for other required parameters
        self._check_for_dictionary_key(  # type: ignore[no-untyped-call]
            logical_id, resource_properties[self.LOCATION_KEY], [self.APPLICATION_ID_KEY, self.SEMANTIC_VERSION_KEY]
        )

        app_id = resource_properties[self.LOCATION_KEY].get(self.APPLICATION_ID_KEY)
        app_id = sam_expect(app_id, logical_id, "ApplicationId").to_not_be_none()

        if isinstance(app_id, dict):
            raise InvalidResourceException(
                logical_id,
                "Property 'ApplicationId' cannot be resolved. Only FindInMap "
                "and Ref intrinsic functions are supported.",
            )

        semver = resource_properties[self.LOCATION_KEY].get(self.SEMANTIC_VERSION_KEY)

        if not semver:
            raise InvalidResourceException(logical_id, "Property 'SemanticVersion' cannot be blank.")

        if isinstance(semver, dict):
            raise InvalidResourceException(
                logical_id,
                "Property 'SemanticVersion' cannot be resolved. Only FindInMap "
                "and Ref intrinsic functions are supported.",
            )

        key = self._make_app_key(app_id, semver)

        # Throw any resource exceptions saved from the before_transform_template event
        if isinstance(self._applications[key], InvalidResourceException):
            raise self._applications[key]

        # validation does not resolve an actual template url
        if not self._validate_only:
            resource_properties[self.TEMPLATE_URL_KEY] = self._applications[key]