mirror of
https://github.com/ae-utbm/sith.git
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218 lines
7.6 KiB
Python
218 lines
7.6 KiB
Python
from django.db import models
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from django.core import validators
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from django.conf import settings
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from django.utils.translation import ugettext_lazy as _
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from django.core.exceptions import ValidationError
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from django.db import IntegrityError, transaction
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from django.core.urlresolvers import reverse
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from django.utils import timezone
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from django.utils.functional import cached_property
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from datetime import datetime
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import pytz
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from core.models import User, MetaGroup, Group, SithFile
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from club.models import Club
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class Forum(models.Model):
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"""
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The Forum class, made as a tree to allow nice tidy organization
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owner_club allows club members to moderate there own topics
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edit_groups allows to put any group as a forum admin
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view_groups allows some groups to view a forum
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"""
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name = models.CharField(_('name'), max_length=64)
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description = models.CharField(_('description'), max_length=256, default="")
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is_category = models.BooleanField(_('is a category'), default=False)
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parent = models.ForeignKey('Forum', related_name='children', null=True, blank=True)
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owner_club = models.ForeignKey(Club, related_name="owned_forums", verbose_name=_("owner club"),
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default=settings.SITH_MAIN_CLUB_ID)
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edit_groups = models.ManyToManyField(Group, related_name="editable_forums", blank=True,
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default=[settings.SITH_GROUP_OLD_SUBSCRIBERS_ID])
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view_groups = models.ManyToManyField(Group, related_name="viewable_forums", blank=True,
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default=[settings.SITH_GROUP_PUBLIC_ID])
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def clean(self):
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self.check_loop()
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def save(self, *args, **kwargs):
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copy_rights = False
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if self.id is None:
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copy_rights = True
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super(Forum, self).save(*args, **kwargs)
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if copy_rights:
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self.copy_rights()
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def apply_rights_recursively(self):
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children = self.children.all()
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for c in children:
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c.copy_rights()
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c.apply_rights_recursively()
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def copy_rights(self):
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"""Copy, if possible, the rights of the parent folder"""
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if self.parent is not None:
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self.owner_club = self.parent.owner_club
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self.edit_groups = self.parent.edit_groups.all()
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self.view_groups = self.parent.view_groups.all()
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self.save()
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def is_owned_by(self, user):
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if user.is_in_group(settings.SITH_GROUP_FORUM_ADMIN_ID):
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return True
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m = self.owner_club.get_membership_for(user)
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if m:
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return m.role > settings.SITH_MAXIMUM_FREE_ROLE
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return False
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def check_loop(self):
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"""Raise a validation error when a loop is found within the parent list"""
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objs = []
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cur = self
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while cur.parent is not None:
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if cur in objs:
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raise ValidationError(_('You can not make loops in forums'))
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objs.append(cur)
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cur = cur.parent
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def __str__(self):
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return "%s" % (self.name)
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def get_absolute_url(self):
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return reverse('forum:view_forum', kwargs={'forum_id': self.id})
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@cached_property
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def parent_list(self):
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return self.get_parent_list()
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def get_parent_list(self):
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l = []
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p = self.parent
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while p is not None:
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l.append(p)
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p = p.parent
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return l
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@cached_property
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def topic_number(self):
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return self.get_topic_number()
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def get_topic_number(self):
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number = self.topics.all().count()
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for c in self.children.all():
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number += c.topic_number
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return number
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@cached_property
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def last_message(self):
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return self.get_last_message()
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def get_last_message(self):
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last_msg = None
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for m in ForumMessage.objects.select_related('topic__forum', 'author').order_by('-id'):
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forum = m.topic.forum
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if self in (forum.parent_list + [forum]):
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return m
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last_msg = m
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return last_msg
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class ForumTopic(models.Model):
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forum = models.ForeignKey(Forum, related_name='topics')
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author = models.ForeignKey(User, related_name='forum_topics')
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description = models.CharField(_('description'), max_length=256, default="")
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class Meta:
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ordering = ['-id'] # TODO: add date message ordering
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def is_owned_by(self, user):
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return self.forum.is_owned_by(user)
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def can_be_edited_by(self, user):
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return user.can_edit(self.forum)
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def can_be_viewed_by(self, user):
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return user.can_view(self.forum)
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def __str__(self):
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return "%s" % (self.title)
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def get_absolute_url(self):
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return reverse('forum:view_topic', kwargs={'topic_id': self.id})
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@property
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def title(self):
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return self.messages.order_by('date').first().title
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class ForumMessage(models.Model):
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"""
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"A ForumMessage object represents a message in the forum" -- Cpt. Obvious
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"""
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topic = models.ForeignKey(ForumTopic, related_name='messages')
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author = models.ForeignKey(User, related_name='forum_messages')
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title = models.CharField(_("title"), default="", max_length=64, blank=True)
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message = models.TextField(_("message"), default="")
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date = models.DateTimeField(_('date'), default=timezone.now)
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readers = models.ManyToManyField(User, related_name="read_messages", verbose_name=_("readers"))
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class Meta:
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ordering = ['id']
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def __str__(self):
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return "%s - %s" % (self.id, self.title)
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def is_owned_by(self, user): # Anyone can create a topic: it's better to
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# check the rights at the forum level, since it's more controlled
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return self.topic.forum.is_owned_by(user) or user.id == self.author.id
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def can_be_edited_by(self, user):
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return user.can_edit(self.topic.forum)
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def can_be_viewed_by(self, user):
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return (not self.deleted and user.can_view(self.topic))
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def can_be_moderated_by(self, user):
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return self.topic.forum.is_owned_by(user) or user.id == self.author.id
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def get_absolute_url(self):
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return self.topic.get_absolute_url() + "#msg_" + str(self.id)
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def mark_as_read(self, user):
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self.readers.add(user)
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def is_read(self, user):
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return (self.date < user.forum_infos.last_read_date) or (user in self.readers.all())
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@cached_property
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def deleted(self):
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return self.is_deleted()
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def is_deleted(self):
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meta = self.metas.exclude(action="EDIT").order_by('-date').first()
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if meta:
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return meta.action == "DELETE"
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return False
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MESSAGE_META_ACTIONS = [
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('EDIT', _("Message edited by")),
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('DELETE', _("Message deleted by")),
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('UNDELETE', _("Message undeleted by")),
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]
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class ForumMessageMeta(models.Model):
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user = models.ForeignKey(User, related_name="forum_message_metas")
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message = models.ForeignKey(ForumMessage, related_name="metas")
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date = models.DateTimeField(_('date'), default=timezone.now)
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action = models.CharField(_("action"), choices=MESSAGE_META_ACTIONS, max_length=16)
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class ForumUserInfo(models.Model):
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"""
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This currently stores only the last date a user clicked "Mark all as read".
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However, this can be extended with lot of user preferences dedicated to a
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user, such as the favourite topics, the signature, and so on...
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"""
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user = models.OneToOneField(User, related_name="_forum_infos") # TODO: see to move that to the User class in order to reduce the number of db queries
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last_read_date = models.DateTimeField(_('last read date'), default=datetime(year=settings.SITH_SCHOOL_START_YEAR,
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month=1, day=1, tzinfo=pytz.UTC))
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