mwparserfromhell/mwparserfromhell/utils.py

# Copyright (C) 2012-2020 Ben Kurtovic <ben.kurtovic@gmail.com>
#
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# furnished to do so, subject to the following conditions:
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"""
This module contains accessory functions for other parts of the library. Parser
users generally won't need stuff from here.
"""

__all__ = ["parse_anything"]

def parse_anything(value, context=0, skip_style_tags=False):
    """Return a :class:`.Wikicode` for *value*, allowing multiple types.

    This differs from :meth:`.Parser.parse` in that we accept more than just a
    string to be parsed. Strings, bytes, integers (converted to strings),
    ``None``, existing :class:`.Node` or :class:`.Wikicode` objects, as well
    as an iterable of these types, are supported. This is used to parse input
    on-the-fly by various methods of :class:`.Wikicode` and others like
    :class:`.Template`, such as :meth:`wikicode.insert() <.Wikicode.insert>`
    or setting :meth:`template.name <.Template.name>`.

    Additional arguments are passed directly to :meth:`.Parser.parse`.
    """
    # pylint: disable=cyclic-import,import-outside-toplevel
    from .nodes import Node
    from .parser import Parser
    from .smart_list import SmartList
    from .wikicode import Wikicode

    if isinstance(value, Wikicode):
        return value
    if isinstance(value, Node):
        return Wikicode(SmartList([value]))
    if isinstance(value, str):
        return Parser().parse(value, context, skip_style_tags)
    if isinstance(value, bytes):
        return Parser().parse(value.decode("utf8"), context, skip_style_tags)
    if isinstance(value, int):
        return Parser().parse(str(value), context, skip_style_tags)
    if value is None:
        return Wikicode(SmartList())
    if hasattr(value, "read"):
        return parse_anything(value.read(), context, skip_style_tags)
    try:
        nodelist = SmartList()
        for item in value:
            nodelist += parse_anything(item, context, skip_style_tags).nodes
        return Wikicode(nodelist)
    except TypeError as exc:
        error = ("Needs string, Node, Wikicode, file, int, None, or "
                 "iterable of these, but got {0}: {1}")
        raise ValueError(error.format(type(value).__name__, value)) from exc