Sith/club/models.py

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from django.db import models
from django.core import validators
from django.conf import settings
from django.utils.translation import ugettext_lazy as _
from django.core.exceptions import ValidationError
from django.core.urlresolvers import reverse
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from core.models import User, MetaGroup, Group
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from subscription.models import Subscriber
# Create your models here.
class Club(models.Model):
"""
The Club class, made as a tree to allow nice tidy organization
"""
name = models.CharField(_('name'), max_length=30)
parent = models.ForeignKey('Club', related_name='children', null=True, blank=True)
unix_name = models.CharField(_('unix name'), max_length=30, unique=True,
validators=[
validators.RegexValidator(
r'^[a-z0-9][a-z0-9._-]*[a-z0-9]$',
_('Enter a valid unix name. This value may contain only '
'letters, numbers ./-/_ characters.')
),
],
error_messages={
'unique': _("A club with that unix name already exists."),
},
)
address = models.CharField(_('address'), max_length=254)
# email = models.EmailField(_('email address'), unique=True) # This should, and will be generated automatically
owner_group = models.ForeignKey(Group, related_name="owned_club",
default=settings.AE_GROUPS['root']['id'])
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edit_groups = models.ManyToManyField(Group, related_name="editable_club", blank=True)
view_groups = models.ManyToManyField(Group, related_name="viewable_club", blank=True)
def check_loop(self):
"""Raise a validation error when a loop is found within the parent list"""
objs = []
cur = self
while cur.parent is not None:
if cur in objs:
raise ValidationError(_('You can not make loops in clubs'))
objs.append(cur)
cur = cur.parent
def clean(self):
self.check_loop()
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def save(self):
super(Club, self).save()
MetaGroup(name=self.unix_name+"-board").save()
MetaGroup(name=self.unix_name+"-members").save()
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse('club:club_view', kwargs={'club_id': self.id})
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def is_owned_by(self, user):
"""
Method to see if that object can be super edited by the given user
"""
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if user.is_in_group(settings.AE_GROUPS['board']['name']):
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return True
return False
def can_be_edited_by(self, user):
"""
Method to see if that object can be edited by the given user
"""
ms = self.get_membership_for(user)
if ms is not None and ms.role >= 7:
return True
return False
def can_be_viewed_by(self, user):
"""
Method to see if that object can be seen by the given user
"""
sub = Subscriber.objects.filter(pk=user.pk).first()
if sub is None:
return False
return sub.is_subscribed()
def get_membership_for(self, user):
"""
Returns the current membership the given user
"""
return self.members.filter(user=user.id).filter(end_date=None).first()
class Membership(models.Model):
"""
The Membership class makes the connection between User and Clubs
Both Users and Clubs can have many Membership objects:
- a user can be a member of many clubs at a time
- a club can have many members at a time too
A User is currently member of all the Clubs where its Membership has an end_date set to null/None.
Otherwise, it's a past membership kept because it can be very useful to see who was in which Club in the past.
"""
user = models.ForeignKey(User, related_name="membership", null=False, blank=False)
club = models.ForeignKey(Club, related_name="members", null=False, blank=False)
start_date = models.DateField(_('start date'), auto_now=True)
end_date = models.DateField(_('end date'), null=True, blank=True)
role = models.IntegerField(_('role'), choices=sorted(settings.CLUB_ROLES.items()),
default=sorted(settings.CLUB_ROLES.items())[0][0])
description = models.CharField(_('description'), max_length=30, null=False, blank=True)
def clean(self):
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sub = Subscriber.objects.filter(pk=self.user.pk).first()
if sub is None or not sub.is_subscribed():
raise ValidationError(_('User must be subscriber to take part to a club'))
if Membership.objects.filter(user=self.user).filter(club=self.club).filter(end_date=None).exists():
raise ValidationError(_('User is already member of that club'))
def __str__(self):
return self.club.name+' - '+self.user.username+' - '+settings.CLUB_ROLES[self.role]+str(
" - "+str(_('past member')) if self.end_date is not None else ""
)
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def get_absolute_url(self):
return reverse('club:club_members', kwargs={'club_id': self.club.id})