mwparserfromhell/mwparserfromhell/utils.py

#
# Copyright (C) 2012-2020 Ben Kurtovic <ben.kurtovic@gmail.com>
#
# 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:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

"""
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:
        raise ValueError(f"Needs string, Node, Wikicode, file, int, None, or "
                         f"iterable of these, but got {type(value).__name__}: "
                         f"{value}") from exc