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

def validate_stream_url(value, protocols=['rtmp://', 'srt://']):
    # Make sure that the URL uses one of the allowed protocols
    if not any([value.startswith(protocol) for protocol in protocols]):
        raise ValidationError(
            _('Invalid URL: %(value)s. Must start with one of the following: %(protocols)s'),
            params={'value': value, 'protocols': ', '.join(protocols)},
        )

    # TODO: Add more validation here

    return value