from django.db import models


class MailingListGroup(models.Model):
    groupname = models.CharField(max_length=64, null=False, blank=False)
    sortkey = models.IntegerField(null=False, default=10)

    purge_urls = ('/community/lists/', )

    @property
    def negid(self):
        return -self.id

    def __str__(self):
        return self.groupname

    class Meta:
        ordering = ('sortkey', )


class MailingList(models.Model):
    group = models.ForeignKey(MailingListGroup, null=False, on_delete=models.CASCADE)
    listname = models.CharField(max_length=64, null=False, blank=False, unique=True)
    active = models.BooleanField(null=False, default=False)
    description = models.TextField(null=False, blank=True)
    shortdesc = models.TextField(null=False, blank=True)

    purge_urls = ('/community/lists/', )

    @property
    def maybe_shortdesc(self):
        if self.shortdesc:
            return self.shortdesc
        return self.listname

    def __str__(self):
        return self.listname

    class Meta:
        ordering = ('listname', )