From 3d174fac85fa8b2659c198fbec43f90104baf341 Mon Sep 17 00:00:00 2001
From: Radek Czajka <radoslaw.czajka@nowoczesnapolska.org.pl>
Date: Mon, 12 Nov 2012 16:19:47 +0100
Subject: [PATCH] Add simple spamfilter

---
 migdal/models.py | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/migdal/models.py b/migdal/models.py
index 54091e4..c98b74f 100644
--- a/migdal/models.py
+++ b/migdal/models.py
@@ -2,18 +2,20 @@
 # This file is part of PrawoKultury, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
+import re
 from datetime import datetime
 from django.conf import settings
+from django.contrib.comments.signals import comment_will_be_posted
 from django.contrib.sites.models import Site
 from django.core.exceptions import ValidationError
-from django.core.mail import send_mail
+from django.core.mail import mail_managers, send_mail
 from django.db import models
 from django.template import loader, Context
 from django.utils.translation import get_language, ugettext_lazy as _, ugettext
 from django_comments_xtd.models import XtdComment
 from markupfield.fields import MarkupField
-from migdal import app_settings
 from fnpdjango.utils.models.translation import add_translatable
+from migdal import app_settings
 from migdal.fields import SlugNullField
 
 class Category(models.Model):
@@ -142,4 +144,19 @@ def notify_new_comment(sender, instance, created, **kwargs):
             mail_text, settings.SERVER_EMAIL, 
             [instance.content_object.author_email]
         )
-models.signals.post_save.connect(notify_new_comment, sender=XtdComment)
\ No newline at end of file
+models.signals.post_save.connect(notify_new_comment, sender=XtdComment)
+
+
+def spamfilter(sender, comment, **kwargs):
+    """Very simple spam filter. Just don't let any HTML links go through."""
+    if re.search(r"<a\s+href=", comment.comment):
+        fields = (comment.user, comment.user_name, comment.user_email,
+            comment.user_url, comment.submit_date, comment.ip_address,
+            comment.followup, comment.comment)
+        mail_managers(u"Spam filter report",
+            (u"""This comment was turned down as SPAM: \n""" +
+            """\n%s""" * len(fields) +
+            """\n\nYou don't have to do anything.""") % fields)
+        return False
+    return True
+comment_will_be_posted.connect(spamfilter)
-- 
2.20.1