Support for rel="canonical"
[django-migdal.git] / migdal / models.py
1 # -*- coding: utf-8 -*-
2 # This file is part of PrawoKultury, licensed under GNU Affero GPLv3 or later.
3 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
4 #
5 import re
6 from datetime import datetime
7 from django.conf import settings
8 from django.contrib.comments.signals import comment_will_be_posted
9 from django.contrib.sites.models import Site
10 from django.core.exceptions import ValidationError
11 from django.core.mail import mail_managers, send_mail
12 from django.db import models
13 from django.template import loader, Context
14 from django.utils.translation import get_language, ugettext_lazy as _, ugettext
15 from django_comments_xtd.models import XtdComment
16 from markupfield.fields import MarkupField
17 from fnpdjango.utils.models.translation import add_translatable, tQ
18 from migdal import app_settings
19 from migdal.fields import SlugNullField
20
21 class Category(models.Model):
22     taxonomy = models.CharField(_('taxonomy'), max_length=32,
23                     choices=app_settings.TAXONOMIES)
24
25     class Meta:
26         verbose_name = _('category')
27         verbose_name_plural = _('categories')
28
29     def __unicode__(self):
30         return self.title
31
32     @models.permalink
33     def get_absolute_url(self):
34         return ('migdal_category', [self.slug])
35
36
37 add_translatable(Category, {
38     'title': models.CharField(max_length=64, unique=True, db_index=True),
39     'slug': models.SlugField(unique=True, db_index=True),
40 })
41
42
43 class PublishedEntryManager(models.Manager):
44     def get_query_set(self):
45         return super(PublishedEntryManager, self).get_query_set().filter(
46                 tQ(published=True)
47             )
48
49 class Entry(models.Model):
50     type = models.CharField(max_length=16,
51             choices=((t.db, t.slug) for t in app_settings.TYPES),
52             db_index=True)
53     date = models.DateTimeField(_('created at'), auto_now_add=True, db_index=True)
54     changed_at = models.DateTimeField(_('changed at'), auto_now=True, db_index=True)
55     author = models.CharField(_('author'), max_length=128)
56     author_email = models.EmailField(_('author email'), max_length=128, null=True, blank=True,
57             help_text=_('Used only to display gravatar and send notifications.'))
58     image = models.ImageField(_('image'), upload_to='entry/image/', null=True, blank=True)
59     promo = models.BooleanField(_('promoted'), default=False)
60     in_stream = models.BooleanField(_('in stream'), default=True)
61     categories = models.ManyToManyField(Category, null=True, blank=True, verbose_name=_('categories'))
62     first_published_at = models.DateTimeField(_('published at'), null=True, blank=True)
63     canonical_url = models.URLField(_('canonical link'), null = True, blank = True)
64
65     objects = models.Manager()
66     published_objects = PublishedEntryManager()
67
68     class Meta:
69         verbose_name = _('entry')
70         verbose_name_plural = _('entries')
71         ordering = ['-date']
72
73     def __unicode__(self):
74         return self.title
75
76     def save(self, *args, **kwargs):
77         published_now = False
78         for lc, ln in settings.LANGUAGES:
79             if (getattr(self, "published_%s" % lc)
80                     and getattr(self, "published_at_%s" % lc) is None):
81                 now = datetime.now()
82                 setattr(self, "published_at_%s" % lc, now)
83                 if self.first_published_at is None:
84                     self.first_published_at = now
85                     published_now = True
86         super(Entry, self).save(*args, **kwargs)
87         if published_now and self.pk is not None:
88             self.notify_author_published()
89
90     def clean(self):
91         for lc, ln in settings.LANGUAGES:
92             if (getattr(self, "published_%s" % lc) and
93                     not getattr(self, "slug_%s" % lc)):
94                 raise ValidationError(
95                     ugettext("Published entry should have a slug in relevant language (%s).") % lc)
96
97     @models.permalink
98     def get_absolute_url(self):
99         return ('migdal_entry_%s' % self.type, [self.slug])
100
101     def get_type(self):
102         return dict(app_settings.TYPES_DICT)[self.type]
103
104     def notify_author_published(self):
105         if not self.author_email:
106             return
107         site = Site.objects.get_current()
108         mail_text = loader.get_template('migdal/mail/published.txt').render(
109             Context({
110                 'entry': self,
111                 'site': site,
112             }))
113         send_mail(
114             ugettext(u'Your story has been published at %s.') % site.domain,
115             mail_text, settings.SERVER_EMAIL, [self.author_email]
116         )
117
118     def inline_html(self):
119         for att in self.attachment_set.all():
120             if att.file.name.endswith(".html"):
121                 with open(att.file.path) as f:
122                     yield f.read()
123
124
125 add_translatable(Entry, languages=app_settings.OPTIONAL_LANGUAGES, fields={
126     'needed': models.CharField(_('needed'), max_length=1, db_index=True, choices=(
127                 ('n', _('Unneeded')), ('w', _('Needed')), ('y', _('Done'))),
128                 default='n'),
129 })
130
131 add_translatable(Entry, {
132     'slug': SlugNullField(unique=True, db_index=True, null=True, blank=True),
133     'title': models.CharField(_('title'), max_length=255, null=True, blank=True),
134     'lead': MarkupField(_('lead'), markup_type='textile_pl', null=True, blank=True,
135                 help_text=_('Use <a href="http://textile.thresholdstate.com/">Textile</a> syntax.')),
136     'body': MarkupField(_('body'), markup_type='textile_pl', null=True, blank=True,
137                 help_text=_('Use <a href="http://textile.thresholdstate.com/">Textile</a> syntax.')),
138     'published': models.BooleanField(_('published'), default=False),
139     'published_at': models.DateTimeField(_('published at'), null=True, blank=True),
140 })
141
142
143 class Attachment(models.Model):
144     file = models.FileField(_('file'), upload_to='entry/attach/')
145     entry = models.ForeignKey(Entry)
146
147     def url(self):
148         return self.file.url if self.file else ''
149
150
151
152 def notify_new_comment(sender, instance, created, **kwargs):
153     if (created and isinstance(instance.content_object, Entry) and
154                 instance.content_object.author_email):
155         site = Site.objects.get_current()
156         mail_text = loader.get_template('migdal/mail/new_comment.txt').render(
157             Context({
158                 'comment': instance,
159                 'site': site,
160             }))
161         send_mail(
162             ugettext(u'New comment under your story at %s.') % site.domain,
163             mail_text, settings.SERVER_EMAIL, 
164             [instance.content_object.author_email]
165         )
166 models.signals.post_save.connect(notify_new_comment, sender=XtdComment)
167
168
169 def spamfilter(sender, comment, **kwargs):
170     """Very simple spam filter. Just don't let any HTML links go through."""
171     if re.search(r"<a\s+href=", comment.comment):
172         fields = (comment.user, comment.user_name, comment.user_email,
173             comment.user_url, comment.submit_date, comment.ip_address,
174             comment.followup, comment.comment)
175         mail_managers(u"Spam filter report",
176             (u"""This comment was turned down as SPAM: \n""" +
177             """\n%s""" * len(fields) +
178             """\n\nYou don't have to do anything.""") % fields)
179         return False
180     return True
181 comment_will_be_posted.connect(spamfilter)