Sith/trombi/models.py

# -*- coding:utf-8 -*
#
# Copyright 2017
# - Skia <skia@libskia.so>
#
# Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
# http://ae.utbm.fr.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License a published by the Free Software
# Foundation; either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Sofware Foundation, Inc., 59 Temple
# Place - Suite 330, Boston, MA 02111-1307, USA.
#
#

from django.db import models
from django.utils.translation import ugettext_lazy as _
from django.core.urlresolvers import reverse
from django.conf import settings
from django.core.exceptions import ValidationError

from datetime import timedelta, date

from core.models import User
from core.utils import get_start_of_semester, get_semester
from club.models import Club

class TrombiManager(models.Manager):
    def get_queryset(self):
        return super(TrombiManager, self).get_queryset()

class AvailableTrombiManager(models.Manager):
    def get_queryset(self):
        return super(AvailableTrombiManager,
                self).get_queryset().filter(subscription_deadline__gte=date.today())

class Trombi(models.Model):
    """
    This is the main class, the Trombi itself.
    It contains the deadlines for the users, and the link to the club that makes
    its Trombi.
    """
    subscription_deadline = models.DateField(_('subscription deadline'),
            default=date.today, help_text=_("Before this date, users are "
                "allowed to subscribe to this Trombi. "
                "After this date, users subscribed will be allowed to comment on each other."))
    comments_deadline = models.DateField(_('comments deadline'),
            default=date.today, help_text=_("After this date, users won't be "
                "able to make comments anymore."))
    max_chars = models.IntegerField(_('maximum characters'), default=400,
            help_text=_('Maximum number of characters allowed in a comment.'))
    show_profiles = models.BooleanField(_("show users profiles to each other"), default=True)
    club = models.OneToOneField(Club, related_name='trombi')

    objects = TrombiManager()
    availables = AvailableTrombiManager()

    def __str__(self):
        return str(self.club.name)

    def clean(self):
        if self.subscription_deadline > self.comments_deadline:
            raise ValidationError(_("Closing the subscriptions after the "
                "comments is definitively not a good idea."))

    def get_absolute_url(self):
        return reverse('trombi:detail', kwargs={'trombi_id': self.id})

    def is_owned_by(self, user):
        return user.can_edit(self.club)

    def can_be_viewed_by(self, user):
        return user.id in [u.user.id for u in self.users.all()]

class TrombiUser(models.Model):
    """
    This class is only here to avoid cross references between the core, club,
    and trombi modules. It binds a User to a Trombi without needing to import
    Trombi into the core.
    It also adds the pictures to the profile without needing all the security
    like the other SithFiles.
    """
    user = models.OneToOneField(User, verbose_name=_("trombi user"), related_name='trombi_user')
    trombi = models.ForeignKey(Trombi, verbose_name=_("trombi"), related_name='users', blank=True, null=True, on_delete=models.SET_NULL)
    profile_pict = models.ImageField(upload_to='trombi', verbose_name=_("profile pict"), null=True, blank=True,
            help_text=_("The profile picture you want in the trombi (warning: this picture may be published)"))
    scrub_pict = models.ImageField(upload_to='trombi', verbose_name=_("scrub pict"), null=True, blank=True,
            help_text=_("The scrub picture you want in the trombi (warning: this picture may be published)"))

    def __str__(self):
        return str(self.user)

    def is_owned_by(self, user):
        return user.is_owner(self.trombi)

    def make_memberships(self):
        self.memberships.all().delete()
        for m in self.user.memberships.filter(role__gt=settings.SITH_MAXIMUM_FREE_ROLE).order_by('end_date'):
            role = str(settings.SITH_CLUB_ROLES[m.role])
            if m.description:
                role += " (%s)" % m.description
            if m.end_date:
                end_date = get_semester(m.end_date)
            else:
                end_date = ""
            TrombiClubMembership(
                    user=self,
                    club=str(m.club),
                    role=role[:64],
                    start=get_semester(m.start_date),
                    end=end_date,
                    ).save()

class TrombiComment(models.Model):
    """
    This represent a comment given by someone to someone else in the same Trombi
    instance.
    """
    author = models.ForeignKey(TrombiUser, verbose_name=_("author"), related_name='given_comments')
    target = models.ForeignKey(TrombiUser, verbose_name=_("target"), related_name='received_comments')
    content = models.TextField(_("content"), default="")
    is_moderated = models.BooleanField(_("is the comment moderated"), default=False)

    def can_be_viewed_by(self, user):
        if user.id == self.target.user.id:
            return False
        return user.id == self.author.user.id or user.can_edit(self.author.trombi)

class TrombiClubMembership(models.Model):
    """
    This represent a membership to a club
    """
    user = models.ForeignKey(TrombiUser, verbose_name=_("user"), related_name='memberships')
    club = models.CharField(_("club"), max_length=32, default="")
    role = models.CharField(_("role"), max_length=64, default="")
    start = models.CharField(_("start"), max_length=16, default="")
    end = models.CharField(_("end"), max_length=16, default="")

    class Meta:
        ordering = ['id']

    def __str__(self):
        return "%s - %s - %s (%s)" % (self.user, self.club, self.role, self.start)

    def can_be_edited_by(self, user):
        return user.id == self.user.user.id or user.can_edit(self.user.trombi)

    def get_absolute_url(self):
        return reverse('trombi:profile')