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.db import IntegrityError, transaction from django.core.urlresolvers import reverse from django.utils import timezone from core.models import User, MetaGroup, Group, SithFile # 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=64) 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.SITH_GROUP_ROOT_ID) edit_groups = models.ManyToManyField(Group, related_name="editable_club", blank=True) view_groups = models.ManyToManyField(Group, related_name="viewable_club", blank=True) home = models.OneToOneField(SithFile, related_name='home_of_club', verbose_name=_("home"), null=True, blank=True, on_delete=models.SET_NULL) 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() def _change_unixname(self, new_name): c = Club.objects.filter(unix_name=new_name).first() if c is None: if self.home: self.home.name = new_name self.home.save() else: raise ValidationError(_("A club with that unix_name already exists")) def make_home(self): if not self.home: home_root = SithFile.objects.filter(parent=None, name="clubs").first() root = User.objects.filter(username="root").first() if home_root and root: home = SithFile(parent=home_root, name=self.unix_name, owner=root) home.save() self.home = home self.save() def save(self, *args, **kwargs): with transaction.atomic(): creation = False old = Club.objects.filter(id=self.id).first() if not old: creation = True else: if old.unix_name != self.unix_name: self._change_unixname(self.unix_name) super(Club, self).save(*args, **kwargs) if creation: board = MetaGroup(name=self.unix_name+settings.SITH_BOARD_SUFFIX) board.save() member = MetaGroup(name=self.unix_name+settings.SITH_MEMBER_SUFFIX) member.save() subscribers = Group.objects.filter(name=settings.SITH_MAIN_MEMBERS_GROUP).first() self.make_home() self.home.edit_groups = [board] self.home.view_groups = [member, subscribers] self.home.save() def __str__(self): return self.name def get_absolute_url(self): return reverse('club:club_view', kwargs={'club_id': self.id}) def get_display_name(self): return self.name def is_owned_by(self, user): """ Method to see if that object can be super edited by the given user """ return user.is_in_group(settings.SITH_MAIN_BOARD_GROUP) 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: 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 = User.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, verbose_name=_('user'), related_name="memberships", null=False, blank=False) club = models.ForeignKey(Club, verbose_name=_('club'), related_name="members", null=False, blank=False) start_date = models.DateField(_('start date')) end_date = models.DateField(_('end date'), null=True, blank=True) role = models.IntegerField(_('role'), choices=sorted(settings.SITH_CLUB_ROLES.items()), default=sorted(settings.SITH_CLUB_ROLES.items())[0][0]) description = models.CharField(_('description'), max_length=128, null=False, blank=True) def clean(self): sub = User.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 save(self, *args, **kwargs): if not self.id: self.start_date = timezone.now() return super(Membership, self).save(*args, **kwargs) def __str__(self): return self.club.name+' - '+self.user.username+' - '+str(settings.SITH_CLUB_ROLES[self.role])+str( " - "+str(_('past member')) if self.end_date is not None else "" ) def is_owned_by(self, user): """ Method to see if that object can be super edited by the given user """ return user.is_in_group(settings.SITH_MAIN_BOARD_GROUP) def can_be_edited_by(self, user): """ Method to see if that object can be edited by the given user """ if user.memberships: ms = user.memberships.filter(club=self.club, end_date=None).first() return (ms and ms.role >= self.role) or user.is_in_group(settings.SITH_MAIN_BOARD_GROUP) return user.is_in_group(settings.SITH_MAIN_BOARD_GROUP) def get_absolute_url(self): return reverse('club:club_members', kwargs={'club_id': self.club.id})