""" template filters """
from django import template


register = template.Library()


@register.filter(name="book_description")
def get_book_description(book):
    """use the work's text if the book doesn't have it"""
    return book.description or book.parent_work.description


@register.simple_tag(takes_context=False)
def get_book_file_links(book):
    """links for a book"""
    return book.file_links.filter(domain__status="approved")