from django.contrib.auth import get_user_model from django.db import models from django.utils.translation import gettext as _ from djmoney.models.fields import MoneyField class CreatedModifiedAbstract(models.Model): modified = models.DateTimeField( auto_now=True, verbose_name=_("modified"), ) created = models.DateTimeField( auto_now_add=True, verbose_name=_("created"), ) class Meta: abstract = True class Organization(CreatedModifiedAbstract): """ This holds the data of the organization that someone is a member of. It is possible that we'll create more advanced features here. """ name = models.CharField( verbose_name=_("name"), max_length=64, ) def __str__(self): return self.name class Meta: verbose_name = _("organization") verbose_name_plural = _("organizations") class Membership(CreatedModifiedAbstract): """ A user remains a member of an organization even though the subscription is unpaid or renewed. This just changes the status/permissions etc. of the membership, thus we need to track subscription creation, expiry, renewals etc. and ensure that the membership is modified accordingly. This expresses some """ organization = models.ForeignKey(Organization, on_delete=models.PROTECT) user = models.ForeignKey(get_user_model(), on_delete=models.PROTECT) can_vote = models.BooleanField( default=False, verbose_name=_("can vote"), help_text=_( "Indicates that the user has a democratic membership of the " "organization." ) ) def __str__(self): return _("{} is a member of {}").format( self.user.get_full_name(), self.organization.name, ) class Meta: verbose_name = _("membership") verbose_name_plural = _("memberships") class SubscriptionType(CreatedModifiedAbstract): """ Properties of subscriptions are stored here. Should of course not be edited after subscriptions are created. """ organization = models.ForeignKey(Organization, on_delete=models.PROTECT) name = models.CharField( verbose_name=_("name"), max_length=64, ) fee = MoneyField( max_digits=16, decimal_places=2, ) fee_vat = MoneyField( max_digits=16, decimal_places=2, default=0, ) duration = models.PositiveSmallIntegerField( default=1, choices=[(1, _("annual"))], verbose_name=_("duration"), ) class Meta: verbose_name = _("subscription type") verbose_name_plural = _("subscription types") class Subscription(CreatedModifiedAbstract): """ To not confuse other types of subscriptions, one can be a *subscribed* member of an organization, meaning that they are paying etc. A subscription does not track payment, this is done in the accounting app. """ subscription_type = models.ForeignKey( SubscriptionType, related_name='memberships', verbose_name=_("subscription type"), on_delete=models.PROTECT, ) user = models.ForeignKey(get_user_model(), on_delete=models.PROTECT) active = models.BooleanField( default=False, verbose_name=_("active"), help_text=_("Automatically set by payment system.") ) starts = models.DateField() ends = models.DateField() renewed_subscription = models.ForeignKey( 'self', null=True, blank=True, verbose_name=_("renewed subscription"), on_delete=models.PROTECT, ) class Meta: verbose_name = _("subscription") verbose_name_plural = _("subscriptions")