apps/dictionary/models.py

   1 # -*- coding: utf-8 -*-
   2 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   3 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   4 #
   5 from django.db import models
   6 from celery.task import task
   7 from sortify import sortify
   8
   9 from catalogue.models import Book
  10
  11
  12 class Note(models.Model):
  13     """Represents a single annotation from a book."""
  14     book = models.ForeignKey(Book)
  15     anchor = models.CharField(max_length=64)
  16     html = models.TextField()
  17     sort_key = models.CharField(max_length=128, db_index=True)
  18
  19     class Meta:
  20         ordering = ['sort_key']
  21
  22
  23 @task(ignore_result=True)
  24 def build_notes(book):
  25     Note.objects.filter(book=book).delete()
  26     if book.html_file:
  27         from librarian import html
  28         for anchor, text_str, html_str in html.extract_annotations(book.html_file.path):
  29             Note.objects.create(book=book, anchor=anchor,
  30                                html=html_str,
  31                                sort_key=sortify(text_str).strip()[:128])
  32
  33 def notes_from_book(sender, instance, **kwargs):
  34     build_notes.delay(instance)
  35 Book.html_built.connect(notes_from_book)