mygpo/pubsub/models.py

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