"""Helper for file-related functions."""

from os import path


class FileHelper:
    """File Helper utility class."""

    @staticmethod
    def _get_extension(file_path: str) -> str:
        """Get file extension from file."""
        return path.splitext(file_path)[1]

    @staticmethod
    def _file_info() -> dict[str, dict[str, str]]:
        """Return a dictionary mapping extension to Content Type."""
        return {
            "wav": {"content_type": "audio/wav"},
            "flac": {"content_type": "audio/flac"},
        }

    @staticmethod
    def get_file_data_from_asset(asset_file: str) -> dict[str, str]:
        """Return file extension, content type from an asset."""
        file_ext = FileHelper._get_extension(asset_file)[1:]
        content_type = FileHelper._file_info()[file_ext]["content_type"]
        return {"file_ext": file_ext, "content_type": content_type}