# -----------------------------------------------------------------------------.
# MIT License

# Copyright (c) 2024 pycolorbar developers
#
# This file is part of pycolorbar.

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in all
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#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# -----------------------------------------------------------------------------.
"""Utility functions for settings module."""


def get_auxiliary_categories(dictionary):
    """Retrieve list of categories keys from a cmap or colorbar dictionary."""
    if "auxiliary" in dictionary:
        categories = dictionary["auxiliary"].get("category", [])
        if isinstance(categories, str):
            categories = [categories]
        return categories
    return []
