sg101: gpp/antispam/utils.py annotate

Implement #83: a string filter facility like NukeSeSentinel. It currently isn't hooked up to anything. Will do that in #84.

rev	line source
bgneal@214	1 """Antispam utility functions other apps can use."""
bgneal@214	2 from django.core.cache import cache
bgneal@214	3
bgneal@214	4 from antispam import SPAM_PHRASE_KEY
bgneal@214	5 from antispam.models import SpamPhrase
bgneal@214	6
bgneal@214	7
bgneal@214	8 def contains_spam(s):
bgneal@214	9 """This function returns True if the supplied string s contains any spam
bgneal@214	10 phrases and False otherwise.
bgneal@214	11 """
bgneal@214	12 phrases = _get_spam_phrases()
bgneal@214	13 for spam in phrases:
bgneal@214	14 if spam in s:
bgneal@214	15 return True
bgneal@214	16
bgneal@214	17 return False
bgneal@214	18
bgneal@214	19
bgneal@214	20 def _get_spam_phrases():
bgneal@214	21 """This function returns the current list of spam phrase strings.
bgneal@214	22 The strings are cached to avoid hitting the database.
bgneal@214	23 """
bgneal@214	24 phrases = cache.get(SPAM_PHRASE_KEY)
bgneal@214	25 if phrases:
bgneal@214	26 return phrases
bgneal@214	27
bgneal@214	28 phrases = SpamPhrase.objects.values_list('phrase', flat=True)
bgneal@214	29 cache.set(SPAM_PHRASE_KEY, phrases)
bgneal@214	30 return phrases
bgneal@214	31

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