77 lines
2.4 KiB
Python
77 lines
2.4 KiB
Python
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import calendar
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import sys
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from email.utils import formatdate
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from apscheduler.scheduler import Scheduler
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from datetime import datetime, timedelta
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from data import model
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class ExpirationScheduler(object):
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def __init__(self, utc_create_notifications_date, utc_terminate_processes_date):
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self._scheduler = Scheduler()
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self._termination_date = utc_terminate_processes_date
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soon = datetime.now() + timedelta(seconds=1)
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if utc_create_notifications_date > datetime.utcnow():
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self._scheduler.add_date_job(model.delete_all_notifications_by_kind, soon,
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['expiring_license'])
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local_notifications_date = self._utc_to_local(utc_create_notifications_date)
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self._scheduler.add_date_job(self._generate_notifications, local_notifications_date)
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else:
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self._scheduler.add_date_job(self._generate_notifications, soon)
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local_termination_date = self._utc_to_local(utc_terminate_processes_date)
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self._scheduler.add_date_job(self._terminate, local_termination_date)
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@staticmethod
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def _format_date(date):
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""" Output an RFC822 date format. """
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if date is None:
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return None
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return formatdate(calendar.timegm(date.utctimetuple()))
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@staticmethod
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def _utc_to_local(utc_dt):
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# get integer timestamp to avoid precision lost
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timestamp = calendar.timegm(utc_dt.timetuple())
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local_dt = datetime.fromtimestamp(timestamp)
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return local_dt.replace(microsecond=utc_dt.microsecond)
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def _generate_notifications(self):
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for user in model.get_active_users():
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model.create_unique_notification('expiring_license', user,
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{'expires_at': self._format_date(self._termination_date)})
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@staticmethod
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def _terminate():
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sys.exit(1)
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def start(self):
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self._scheduler.start()
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class Expiration(object):
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def __init__(self, app=None):
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self.app = app
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if app is not None:
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self.state = self.init_app(app)
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else:
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self.state = None
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def init_app(self, app):
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expiration = ExpirationScheduler(app.config['LICENSE_EXPIRATION_WARNING'],
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app.config['LICENSE_EXPIRATION'])
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expiration.start()
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# register extension with app
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app.extensions = getattr(app, 'extensions', {})
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app.extensions['expiration'] = expiration
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return expiration
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def __getattr__(self, name):
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return getattr(self.state, name, None)
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