Sith/forum/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.db import IntegrityError, transaction
from django.core.urlresolvers import reverse
from django.utils import timezone
from core.models import User, MetaGroup, Group, SithFile
class Forum(models.Model):
"""
The Forum class, made as a tree to allow nice tidy organization
"""
name = models.CharField(_('name'), max_length=64)
description = models.CharField(_('description'), max_length=256, default="")
is_category = models.BooleanField(_('is a category'), default=False)
parent = models.ForeignKey('Forum', related_name='children', null=True, blank=True)
edit_groups = models.ManyToManyField(Group, related_name="editable_forums", blank=True,
default=[settings.SITH_GROUP_OLD_SUBSCRIBERS_ID])
view_groups = models.ManyToManyField(Group, related_name="viewable_forums", blank=True,
default=[settings.SITH_GROUP_PUBLIC_ID])
def is_owned_by(self, user):
return user.is_in_group(settings.SITH_GROUP_FORUM_ADMIN_ID)
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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 forums'))
objs.append(cur)
cur = cur.parent
def clean(self):
self.check_loop()
def __str__(self):
return "%s" % (self.name)
def get_absolute_url(self):
return reverse('forum:view_forum', kwargs={'forum_id': self.id})
def get_parent_list(self):
l = []
p = self.parent
while p is not None:
l.append(p)
p = p.parent
return l
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def get_topic_number(self):
number = self.topics.all().count()
for c in self.children.all():
number += c.get_topic_number()
return number
def get_last_message(self):
last_msg = None
for m in ForumMessage.objects.order_by('-id'):
forum = m.topic.forum
if self in (forum.get_parent_list() + [forum]):
return m
last_msg = m
try:
pass
except: pass
return last_msg
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class ForumTopic(models.Model):
forum = models.ForeignKey(Forum, related_name='topics')
author = models.ForeignKey(User, related_name='forum_topics')
title = models.CharField(_("title"), default="", max_length=64)
description = models.CharField(_('description'), max_length=256, default="")
class Meta:
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ordering = ['-id'] # TODO: add date message ordering
def is_owned_by(self, user):
return self.forum.is_owned_by(user) or user.id == self.author.id
def can_be_edited_by(self, user):
return user.can_edit(self.forum)
def can_be_viewed_by(self, user):
return user.can_view(self.forum)
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def __str__(self):
return "%s" % (self.title)
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def get_absolute_url(self):
return reverse('forum:view_topic', kwargs={'topic_id': self.id})
class ForumMessage(models.Model):
"""
"A ForumMessage object represents a message in the forum" -- Cpt. Obvious
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"""
topic = models.ForeignKey(ForumTopic, related_name='messages')
author = models.ForeignKey(User, related_name='forum_messages')
title = models.CharField(_("title"), default="", max_length=64, blank=True)
message = models.TextField(_("message"), default="")
date = models.DateTimeField(_('date'), default=timezone.now)
class Meta:
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ordering = ['id']
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def is_owned_by(self, user):
return self.topic.is_owned_by(user) or user.id == self.author.id
def can_be_edited_by(self, user):
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return user.is_owner(self.topic)
def can_be_viewed_by(self, user):
return user.can_view(self.topic)
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def get_absolute_url(self):
return self.topic.get_absolute_url()