mygpo/pubsub/models.py

   1
   2
   3 from django.db import models
   4
   5 from mygpo.podcasts.models import Podcast
   6 from mygpo.core.models import UpdateInfoModel
   7
   8
   9 class SubscriptionError(Exception):
  10     pass
  11
  12
  13 class HubSubscription(UpdateInfoModel):
  14     """ A client-side PubSubHubbub subscription
  15
  16     https://code.google.com/p/pubsubhubbub/ """
  17
  18     SUBSCRIBE = 'subscribe'
  19     UNSUBSCRIBE = 'unsubscribe'
  20
  21     MODE_CHOICES = (
  22         (SUBSCRIBE, 'subscribe'),
  23         (UNSUBSCRIBE, 'unsubscribe'),
  24     )
  25
  26     # podcast to which the subscription belongs
  27     podcast = models.ForeignKey(Podcast, on_delete=models.PROTECT)
  28
  29     # the topic of the subscription, ie the URL that was subscribed at the hub
  30     topic_url = models.CharField(max_length=2048, unique=True)
  31
  32     # the URL of the hub
  33     hub_url = models.CharField(max_length=1000)
  34
  35     # a token to verify the authenticity of the hub
  36     verify_token = models.CharField(max_length=32)
  37
  38     # the last mode that was requested, either subscribe or unsubscribe
  39     mode = models.CharField(
  40         choices=MODE_CHOICES,
  41         max_length=max(map(len, [mode for mode, name in MODE_CHOICES])),
  42         blank=True,
  43     )
  44
  45     # indicates whether the last mode change has already been verified
  46     verified = models.BooleanField(default=False)