--- a/gpp/antispam/utils.py	Fri May 14 02:19:48 2010 +0000
+++ b/gpp/antispam/utils.py	Sat May 29 04:51:28 2010 +0000
@@ -1,8 +1,14 @@
 """Antispam utility functions other apps can use."""
+import datetime
+import logging
+import textwrap
+
 from django.core.cache import cache
 
 from antispam import SPAM_PHRASE_KEY
 from antispam.models import SpamPhrase
+from core.functions import email_admins
+from bio.models import STA_SUSPENDED
 
 
 def contains_spam(s):
@@ -10,6 +16,7 @@
     phrases and False otherwise.
     """
     phrases = _get_spam_phrases()
+    s = s.lower()
     for spam in phrases:
         if spam in s:
             return True
@@ -17,6 +24,45 @@
     return False
 
 
+def spam_check(request, content):
+    """This function checks the supplied content for spam if the user from the
+    supplied request is a stranger (new to the site). If spam is found, the
+    function makes a log entry, emails the admins, suspends the user's account
+    and returns True. If spam is not found, False is returned.
+    It is assumed that request.user is an authenticated user and thus has a
+    user profile.
+    """
+    user = request.user
+    if user.get_profile().is_stranger() and contains_spam(content):
+
+        ip = request.META.get('REMOTE_ADDR', "unknown")
+
+        msg = textwrap.dedent("""\
+            SPAM FILTER TRIPPED by %s
+            PATH: %s
+            IP: %s
+            Message:
+            %s
+            """ % (user.username, request.path, ip, content))
+
+        logging.info(msg)
+        email_admins("SPAM FILTER TRIPPED BY %s" % user.username, msg)
+        suspend_user(user)
+        return True
+
+    return False
+
+
+def suspend_user(user):
+    """This function marks the user as suspended."""
+    user.is_active = False
+    user.save()
+    profile = user.get_profile()
+    profile.status = STA_SUSPENDED
+    profile.status_date = datetime.datetime.now()
+    profile.save()
+    
+
 def _get_spam_phrases():
     """This function returns the current list of spam phrase strings.
     The strings are cached to avoid hitting the database.
@@ -28,4 +74,3 @@
     phrases = SpamPhrase.objects.values_list('phrase', flat=True)
     cache.set(SPAM_PHRASE_KEY, phrases)
     return phrases
-