101 lines
2.7 KiB
Python
101 lines
2.7 KiB
Python
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from __future__ import annotations
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import logging
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import os
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from typing import ClassVar
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class TypeData:
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def __init__(self, default_type, as_type) -> None:
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self.default_type = default_type
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self.as_type = as_type
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def __repr__(self) -> str:
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return f"{self.__class__.__name__}(base={self.default_type}, as={self.as_type})"
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def convert(self, value):
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return self.default_type(value)
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class BoolType(TypeData):
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BOOLEAN_STATES: ClassVar[dict[str, bool]] = {
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"1": True,
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"yes": True,
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"true": True,
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"on": True,
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"0": False,
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"no": False,
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"false": False,
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"off": False,
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}
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def convert(self, value):
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if value.lower() not in self.BOOLEAN_STATES:
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msg = f"Not a boolean: {value}"
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raise ValueError(msg)
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return self.BOOLEAN_STATES[value.lower()]
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class NoneType(TypeData):
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def convert(self, value):
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if not value:
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return None
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return str(value)
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class ListType(TypeData):
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def _validate(self):
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"""no op."""
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def convert(self, value, flatten=True): # noqa: ARG002, FBT002
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values = self.split_values(value)
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result = []
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for a_value in values:
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sub_values = a_value.split(os.pathsep)
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result.extend(sub_values)
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return [self.as_type(i) for i in result]
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def split_values(self, value):
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"""
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Split the provided value into a list.
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First this is done by newlines. If there were no newlines in the text,
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then we next try to split by comma.
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"""
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if isinstance(value, (str, bytes)):
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# Use `splitlines` rather than a custom check for whether there is
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# more than one line. This ensures that the full `splitlines()`
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# logic is supported here.
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values = value.splitlines()
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if len(values) <= 1:
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values = value.split(",")
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values = filter(None, [x.strip() for x in values])
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else:
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values = list(value)
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return values
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def convert(value, as_type, source):
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"""Convert the value as a given type where the value comes from the given source."""
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try:
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return as_type.convert(value)
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except Exception as exception:
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logging.warning("%s failed to convert %r as %r because %r", source, value, as_type, exception)
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raise
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_CONVERT = {bool: BoolType, type(None): NoneType, list: ListType}
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def get_type(action):
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default_type = type(action.default)
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as_type = default_type if action.type is None else action.type
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return _CONVERT.get(default_type, TypeData)(default_type, as_type)
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__all__ = [
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"convert",
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"get_type",
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]
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