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slug.py
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30 lines (22 loc) · 730 Bytes
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"""Slug."""
# standard
import re
# local
from .utils import validator
@validator
def slug(value: str, /):
"""Validate whether or not given value is valid slug.
Valid slug can contain only lowercase alphanumeric characters and hyphens.
It starts and ends with these lowercase alphanumeric characters.
Examples:
>>> slug('my-slug-2134')
True
>>> slug('my.slug')
ValidationError(func=slug, args={'value': 'my.slug'})
Args:
value: Slug string to validate.
Returns:
(Literal[True]): If `value` is a valid slug.
(ValidationError): If `value` is an invalid slug.
"""
return re.match(r"^[a-z0-9]+(?:-[a-z0-9]+)*$", value) if value else False