43 lines
1.2 KiB
Python
43 lines
1.2 KiB
Python
"""passbook core rule engine"""
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from logging import getLogger
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from celery import group
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from passbook.core.celery import CELERY_APP
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from passbook.core.models import Rule, User
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LOGGER = getLogger(__name__)
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@CELERY_APP.task()
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def _rule_engine_task(user_pk, rule_pk):
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"""Task wrapper to run rule checking"""
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rule_obj = Rule.objects.filter(pk=rule_pk).select_subclasses().first()
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user_obj = User.objects.get(pk=user_pk)
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LOGGER.debug("Running rule `%s`#%s for user %s...", rule_obj.name, rule_obj.pk.hex, user_obj)
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return rule_obj.passes(user_obj)
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class RuleEngine:
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"""Orchestrate rule checking, launch tasks and return result"""
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_rule_model = None
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_group = None
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def __init__(self, rule_model):
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self._rule_model = rule_model
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def for_user(self, user):
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"""Check rules for user"""
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signatures = []
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for rule in self._rule_model.rules.all():
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signatures.append(_rule_engine_task.s(user.pk, rule.pk.hex))
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self._group = group(signatures)()
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return self
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@property
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def result(self):
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"""Get rule-checking result"""
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for rule_result in self._group.get():
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if rule_result is False:
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return False
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return True
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