gremmie@1: """Models for the bulletins app.
gremmie@1: Bulletins allow the sited admins to display and manage important notices for the website.
gremmie@1: """
gremmie@1: 
gremmie@1: import datetime
gremmie@1: from django.db import models
gremmie@1: from django.db.models import Q
bgneal@54: from django.core.cache import cache
gremmie@1: 
gremmie@1: 
gremmie@1: class BulletinManager(models.Manager):
bgneal@54:     """Manager for the Bulletin model."""
gremmie@1: 
bgneal@54:     def get_current(self):
bgneal@54:         now = datetime.datetime.now()
bgneal@54:         return self.filter(
bgneal@54:                 Q(is_enabled=True),
bgneal@54:                 Q(start_date__lte=now),
bgneal@54:                 Q(end_date__isnull=True) | Q(end_date__gte=now))
gremmie@1: 
gremmie@1: 
gremmie@1: class Bulletin(models.Model):
bgneal@54:     """Model to represent site bulletins."""
bgneal@54:     title = models.CharField(max_length=200)
bgneal@54:     text = models.TextField()
bgneal@54:     start_date = models.DateTimeField(db_index=True,
bgneal@54:             help_text='Start date for when the bulletin will be active.',)
bgneal@54:     end_date = models.DateTimeField(blank=True, null=True, db_index=True,
bgneal@54:             help_text='End date for the bulletin. Leave blank to keep it open-ended.')
bgneal@54:     is_enabled = models.BooleanField(default=True, db_index=True,
bgneal@54:             help_text='Check to allow the bulletin to be viewed on the site.')
gremmie@1: 
bgneal@54:     objects = BulletinManager()
gremmie@1: 
bgneal@54:     class Meta:
bgneal@54:         ordering = ('-start_date', )
gremmie@1: 
bgneal@54:     def __unicode__(self):
bgneal@54:         return self.title
bgneal@54: 
bgneal@54:     def save(self, force_insert=False, force_update=False):
bgneal@54:         super(Bulletin, self).save(force_insert, force_update)
bgneal@54:         cache.delete('home_bulletins')
bgneal@54: 
bgneal@54: