from django.core.exceptions import ValidationError
from django.core.validators import RegexValidator
from django.utils.translation import gettext_lazy as _

class usernameValidator(RegexValidator):

    def __init__(self, inverse_match=None, flags=None):
        regex = r"^[A-Za-zåäöÅÄÖ][A-Za-z0-9åäöÅÄÖ_]{2,34}$"
        message = _("Username is invalid. username must be between 3 and 35 characters long and start with a character between a-ö all other characters can be a-ö, 0-9 or _")
        code = "invalid_username"
        super(usernameValidator, self).__init__(regex=regex, message=message, code=code, inverse_match=inverse_match, flags=flags)