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"""UUID."""
# standard
import re
from typing import Union
from uuid import UUID
# local
from .utils import validator
@validator
def uuid(value: Union[str, UUID], /):
"""Return whether or not given value is a valid UUID-v4 string.
This validator is based on [WTForms UUID validator][1].
[1]: https://github.com/wtforms/wtforms/blob/master/src/wtforms/validators.py#L539
Examples:
>>> uuid('2bc1c94f-0deb-43e9-92a1-4775189ec9f8')
# Output: True
>>> uuid('2bc1c94f 0deb-43e9-92a1-4775189ec9f8')
# Output: ValidationError(func=uuid, ...)
Args:
value:
UUID string or object to validate.
Returns:
(Literal[True]): If `value` is a valid UUID.
(ValidationError): If `value` is an invalid UUID.
"""
if not value:
return False
if isinstance(value, UUID):
return True
try:
return UUID(value) or re.match(
r"^[0-9a-fA-F]{8}-([0-9a-fA-F]{4}-){3}[0-9a-fA-F]{12}$", value
)
except ValueError:
return False