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36 lines
1.3 KiB
Python
36 lines
1.3 KiB
Python
from django.apps import AppConfig
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from django.conf import settings
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from django.core.cache import caches
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from django.db.models.signals import pre_save
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from django.dispatch import receiver
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MIDDLEWARES = getattr(settings, 'MIDDLEWARE_CLASSES', [])
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class TOSConfig(AppConfig):
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name = 'tos'
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verbose_name = 'Terms Of Service'
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def ready(self):
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if 'tos.middleware.UserAgreementMiddleware' in MIDDLEWARES:
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# Force the user to create a separate cache
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cache = caches[getattr(settings, 'TOS_CACHE_NAME', 'default')]
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TermsOfService = self.get_model('TermsOfService')
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@receiver(pre_save, sender=TermsOfService, dispatch_uid='invalidate_cached_agreements')
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def invalidate_cached_agreements(TermsOfService, instance, **kwargs):
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if kwargs.get('raw', False):
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return
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# Set the key version to 0 if it doesn't exist and leave it
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# alone if it does
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cache.add('django:tos:key_version', 0)
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# This key will be used to version the rest of the TOS keys
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# Incrementing it will effectively invalidate all previous keys
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cache.incr('django:tos:key_version')
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# Create the TOS key version immediately
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invalidate_cached_agreements(TermsOfService, None)
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