"""
Database models for the badges app
"""


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


def validate_badge_image(image):
    """
    Validates that a particular image is small enough to be a badge and square.
    """
    if image.width != image.height:
        raise ValidationError(_("The badge image must be square."))
    if not image.size < (250 * 1024):
        raise ValidationError(_("The badge image file size must be less than 250KB."))


def validate_lowercase(string):
    """
    Validates that a string is lowercase.
    """
    if not string.islower():
        raise ValidationError(_("This value must be all lowercase."))