tools.py

from pathlib import Path

WAVELENGTHS = {"Mo": 0.71, "Ag": 0.59, "Cu": 1.54}
known_sources = [key for key in WAVELENGTHS.keys()]


def set_output_directory(args):
    """
    set the output directory based on the given input arguments

    Parameters
    ----------
    args argparse.Namespace
        the arguments from the parser

    Returns
    -------
    pathlib.PosixPath that contains the full path of the output directory

    it is determined as follows:
    If user provides an output directory, use it.
    Otherwise, we set it to the current directory if nothing is provided.
    We then create the directory if it does not exist.

    """
    output_dir = Path(args.output_directory).resolve() if args.output_directory else Path.cwd().resolve()
    output_dir.mkdir(parents=True, exist_ok=True)
    return output_dir


def _expand_user_input(args):
    """
    Expands the list of inputs by adding files from file lists and wildcards.

    Parameters
    ----------
    args argparse.Namespace
        the arguments from the parser

    Returns
    -------
    the arguments with the modified input list

    """
    file_list_inputs = [input_name for input_name in args.input if "file_list" in input_name]
    for file_list_input in file_list_inputs:
        with open(file_list_input, "r") as f:
            file_inputs = [input_name.strip() for input_name in f.readlines()]
        args.input.extend(file_inputs)
        args.input.remove(file_list_input)
    wildcard_inputs = [input_name for input_name in args.input if "*" in input_name]
    for wildcard_input in wildcard_inputs:
        input_files = [str(file) for file in Path(".").glob(wildcard_input) if "file_list" not in file.name]
        args.input.extend(input_files)
        args.input.remove(wildcard_input)
    return args


def set_input_lists(args):
    """
    Set input directory and files.

    It takes cli inputs, checks if they are files or directories and creates
    a list of files to be processed which is stored in the args Namespace.

    Parameters
    ----------
    args argparse.Namespace
        the arguments from the parser

    Returns
    -------
    args argparse.Namespace

    """

    input_paths = []
    args = _expand_user_input(args)
    for input_name in args.input:
        input_path = Path(input_name).resolve()
        if input_path.exists():
            if input_path.is_file():
                input_paths.append(input_path)
            elif input_path.is_dir():
                input_files = input_path.glob("*")
                input_files = [
                    file.resolve() for file in input_files if file.is_file() and "file_list" not in file.name
                ]
                input_paths.extend(input_files)
            else:
                raise FileNotFoundError(
                    f"Cannot find {input_name}. Please specify valid input file(s) or directories."
                )
        else:
            raise FileNotFoundError(f"Cannot find {input_name}.")
    setattr(args, "input_paths", list(set(input_paths)))
    return args


def set_wavelength(args):
    """
    Set the wavelength based on the given input arguments

    Parameters
    ----------
    args argparse.Namespace
        the arguments from the parser

    Returns
    -------
        float: the wavelength value

    we raise an ValueError if the input wavelength is non-positive
    or if the input anode_type is not one of the known sources

    """
    if args.wavelength is not None and args.wavelength <= 0:
        raise ValueError(
            "No valid wavelength. Please rerun specifying a known anode_type or a positive wavelength."
        )
    if not args.wavelength and args.anode_type and args.anode_type not in WAVELENGTHS:
        raise ValueError(
            f"Anode type not recognized. Please rerun specifying an anode_type from {*known_sources, }."
        )

    if args.wavelength:
        return args.wavelength
    elif args.anode_type:
        return WAVELENGTHS[args.anode_type]
    else:
        return WAVELENGTHS["Mo"]


def _load_key_value_pair(s):
    items = s.split("=")
    key = items[0].strip()
    if len(items) > 1:
        value = "=".join(items[1:])
    return (key, value)


def load_user_metadata(args):
    """
    Load user metadata into the provided argparse Namespace, raise ValueError if in incorrect format

    Parameters
    ----------
    args argparse.Namespace
        the arguments from the parser

    Returns
    -------
    the updated argparse Namespace with user metadata inserted as key-value pairs

    """

    reserved_keys = vars(args).keys()

    if args.user_metadata:
        for item in args.user_metadata:
            if "=" not in item:
                raise ValueError(
                    "Please provide key-value pairs in the format key=value. "
                    "For more information, use `labpdfproc --help.`"
                )
            key, value = _load_key_value_pair(item)
            if key in reserved_keys:
                raise ValueError(f"{key} is a reserved name.  Please rerun using a different key name. ")
            if hasattr(args, key):
                raise ValueError(f"Please do not specify repeated keys: {key}. ")
            setattr(args, key, value)
    delattr(args, "user_metadata")
    return args