load_matlib

class LoadMatlib(load.LoaderPlugin):
    """Load material library files with Material Library"""

    label = "Load Material Library"
    product_base_types = {"matlib"}
    product_types = product_base_types
    representations = {"*"}
    extensions = {"mat"}
    order = -9
    icon = "code-fork"
    color = "white"

    def load(self, context, name, namespace, data):
        """Load the material library file into the scene and containerise it."""
        file_path = self.filepath_from_context(context)
        folder_name = context["folder"]["name"]
        namespace = unique_namespace(
            name + "_",
            prefix=f"{folder_name}_",
            suffix="_",
        )
        rt.sme.OpenMtlLib(file_path)
        return containerise(
            name,
            [],
            context,
            namespace=namespace,
            loader=self.__class__.__name__,
            additional_data={"matlib_filepath": file_path}
        )

    def remove(self, container):
        """Remove the material library from the scene and clean up the container."""
        matlib_filepath = container["matlib_filepath"]
        if matlib_filepath:
            rt.sme.CloseMtlLib(matlib_filepath)
        container_node = rt.getNodeByName(container["instance_node"])
        remove_container_data(container_node)