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import urllib
import warnings
from collections.abc import Callable
from typing import Any, Union
import pystac
from pystac_client.errors import IgnoredResultWarning
Modifiable = Union[
pystac.Collection, pystac.Item, pystac.ItemCollection, dict[Any, Any]
]
def call_modifier(
modifier: Callable[[Modifiable], None] | None, obj: Modifiable
) -> None:
"""Calls the user's modifier and validates that the result is None."""
if modifier is None:
return None
result = modifier(obj)
if result is not None and result is not obj:
warnings.warn(
f"modifier '{modifier}' returned a result that's being ignored. "
"You should ensure that 'modifier' is operating in-place and use "
"a function that returns 'None' or silence this warning.",
IgnoredResultWarning,
)
def urljoin(href: str, name: str) -> str:
"""Joins a path onto an existing href, respecting query strings, etc."""
url = urllib.parse.urlparse(href)
path = url.path
if not path.endswith("/"):
path += "/"
return urllib.parse.urlunparse(url._replace(path=path + name))
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