src/messaging/states.py

   1 from datetime import timedelta
   2 from django.utils.timezone import now
   3 from django.utils.translation import ugettext_lazy as _
   4 from .recipient import Recipient
   5
   6
   7 class State:
   8     allow_negative_offset = False
   9     context_fields = []
  10
  11
  12     def __init__(self, offset=0, time=None):
  13         self.time = time or now()
  14         if isinstance(offset, int):
  15             offset = timedelta(offset)
  16         self.offset = offset
  17
  18     def get_recipients(self):
  19         return [
  20             Recipient(
  21                 hash_value=self.get_hash_value(obj),
  22                 email=self.get_email(obj),
  23                 context=self.get_context(obj),
  24             )
  25             for obj in self.get_objects()
  26         ]
  27
  28     def get_objects(self):
  29         raise NotImplemented
  30
  31     def get_hash_value(self, obj):
  32         return str(obj.pk)
  33
  34     def get_email(self, obj):
  35         return obj.email
  36
  37     def get_context(self, obj):
  38         ctx = {
  39             obj._meta.model_name: obj,
  40         }
  41         return ctx
  42
  43
  44 class ClubMembershipExpiring(State):
  45     slug = 'club-membership-expiring'
  46     allow_negative_offset = True
  47     name = _('club membership expiring')
  48
  49     def get_objects(self):
  50         from club.models import Schedule
  51         return Schedule.objects.filter(
  52                 is_active=True,
  53                 expires_at__lt=self.time - self.offset
  54             )
  55
  56     def get_hashed_value(self, obj):
  57         return '%s:%s' % (obj.pk, obj.expires_at.isoformat())
  58
  59 class ClubPaymentUnfinished(State):
  60     slug = 'club-payment-unfinished'
  61     name = _('club payment unfinished')
  62
  63     def get_objects(self):
  64         from club.models import Schedule
  65         return Schedule.objects.filter(
  66                 payuorder=None,
  67                 started_at__lt=self.time - self.offset,
  68             )
  69
  70
  71 states = [
  72     ClubMembershipExpiring,
  73     ClubPaymentUnfinished,
  74 ]
  75