bgneal@214: """Antispam utility functions other apps can use."""
bgneal@214: from django.core.cache import cache
bgneal@214: 
bgneal@214: from antispam import SPAM_PHRASE_KEY
bgneal@214: from antispam.models import SpamPhrase
bgneal@214: 
bgneal@214: 
bgneal@214: def contains_spam(s):
bgneal@214:     """This function returns True if the supplied string s contains any spam
bgneal@214:     phrases and False otherwise.
bgneal@214:     """
bgneal@214:     phrases = _get_spam_phrases()
bgneal@214:     for spam in phrases:
bgneal@214:         if spam in s:
bgneal@214:             return True
bgneal@214: 
bgneal@214:     return False
bgneal@214: 
bgneal@214: 
bgneal@214: def _get_spam_phrases():
bgneal@214:     """This function returns the current list of spam phrase strings.
bgneal@214:     The strings are cached to avoid hitting the database.
bgneal@214:     """
bgneal@214:     phrases = cache.get(SPAM_PHRASE_KEY)
bgneal@214:     if phrases:
bgneal@214:         return phrases
bgneal@214: 
bgneal@214:     phrases = SpamPhrase.objects.values_list('phrase', flat=True)
bgneal@214:     cache.set(SPAM_PHRASE_KEY, phrases)
bgneal@214:     return phrases
bgneal@214: