src/postorius/forms/validators.py

   1 import uuid
   2
   3 from django.core.exceptions import ValidationError
   4 from django.core.validators import validate_email
   5 from django.utils.translation import gettext_lazy as _
   6
   7
   8 def validate_uuid_or_email(input_value):
   9     """Check if the value is a valid email or UUID.
  10
  11     This is useful to determine if a given input is a user identifier in
  12     Mailman 3 API 3.1+, where, user identifiers are either UUID or email.
  13
  14     :param input_value: The value to validate.
  15     :type input_value: str
  16     :returns: input_value
  17     :rtype: str
  18     :raises ValidationError: If the value is either a UUID, not an email.
  19     """
  20
  21     try:
  22         validate_email(input_value)
  23     except ValidationError:
  24         is_email = False
  25     else:
  26         is_email = True
  27
  28     is_uuid = False
  29     if not is_email:
  30         try:
  31             uuid.UUID(input_value)
  32         except ValueError:
  33             is_uuid = False
  34         else:
  35             is_uuid = True
  36
  37     if not any([is_email, is_uuid]):
  38         raise ValidationError(
  39             _('Invalid: "{0}" should be either email or UUID').format(
  40                 input_value),
  41             params={'value': input_value},
  42             code='invalid')
  43     return input_value