from django.utils.timezone import now

from django.utils.translation import gettext_lazy as _

from django.contrib.auth.models import Group

from django.core.validators import MaxLengthValidator

from django.core.validators import MaxLengthValidator, FileExtensionValidator

from django.contrib.auth import get_user_model

from django.contrib.contenttypes.models import ContentType

from .slugify import set_slug

from .utils import (

    cached, upto, static, syntaxer, get_aspect,

    hash_verify, gpg_verify, sha1,

    hash_verify, gpg_verify, sha1, signature_valid_types,

    MimeType, FileEx

)

from .video_url import video_detect

    owner = BooleanField(_('Permission'), choices=OWNS, default=True)

    owner_name = CharField(_('Owner\'s Name'), max_length=128, **NULL)

    signature = FileField(_('Signature/Checksum'), **upto('sigs'))

    signature = FileField(_('Signature/Checksum'), validators=[FileExtensionValidator(signature_valid_types())], **upto('sigs'))

    verified = BooleanField(_('Verified Signature'), default=False)

    mirror = BooleanField(default=False)

    embed = BooleanField(default=False)

        """Returns a banner image icon"""

        return self.icon('banner')

def signature_valid_types():

    """Return a list of valid signature types"""

    return {'sig'} | hashlib.algorithms_available

def hash_verify(sig_type, sig, data):

    """Verify the signature against the data (for example md5)"""

    sig.file.open()