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"""Pathable parsers module"""
from typing import Any
from typing import Hashable
from typing import List
from typing import Union
from pathable.types import PartType
SEPARATOR = "/"
def parse_parts(parts: List[PartType], sep: str = SEPARATOR) -> List[Hashable]:
"""Parse (filter and split) path parts."""
parsed: List[Hashable] = []
it = reversed(parts)
for part in it:
if isinstance(part, int):
parsed.append(part)
continue
if not part:
continue
if sep in part:
for x in reversed(part.split(sep)):
if x and x != ".":
parsed.append(x)
else:
if part and part != ".":
parsed.append(part)
parsed.reverse()
return parsed
def parse_args(args: List[Any], sep: str = SEPARATOR) -> List[Hashable]:
"""Canonicalize path constructor arguments."""
parts: List[PartType] = []
for a in args:
if hasattr(a, "parts"):
parts += a.parts
else:
if isinstance(a, bytes):
a = a.decode("ascii")
if isinstance(a, str):
parts.append(a)
elif isinstance(a, int):
parts.append(a)
else:
raise TypeError(
"argument should be a text object or a Path "
"object returning text, binary not %r" % type(a)
)
return parse_parts(parts, sep)
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