5673fabeff
Status is mainly computed in Python. That fix inconsistent datetime between client and server. Client only receives status and keep timestamp of last received ws msg.
109 lines
2.9 KiB
Python
109 lines
2.9 KiB
Python
from datetime import timedelta
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from django.utils import timezone
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from ..decorators import kfet_is_team
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from ..utils import CachedMixin
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class OpenKfet(CachedMixin, object):
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"""Manage "open" status of a place.
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Stores raw data (e.g. sent by raspberry), and user-set values
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(as force_close).
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Setting differents `cache_prefix` allows different places management.
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Current state persists through cache.
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"""
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# status is unknown after this duration
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time_unknown = timedelta(minutes=15)
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# status
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OPENED = 'opened'
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CLOSED = 'closed'
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UNKNOWN = 'unknown'
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# admin status
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FAKE_CLOSED = 'fake_closed'
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# cached attributes config
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cached = {
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'_raw_open': False,
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'_last_update': None,
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'force_close': False,
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}
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cache_prefix = 'kfetopen'
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@property
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def raw_open(self):
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"""Defined as property to update `last_update` on `raw_open` update."""
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return self._raw_open
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@raw_open.setter
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def raw_open(self, value):
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self._last_update = timezone.now()
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self._raw_open = value
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@property
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def last_update(self):
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"""Prevent `last_update` to be set."""
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return self._last_update
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@property
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def is_open(self):
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"""Take into account force_close."""
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return False if self.force_close else self.raw_open
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def status(self):
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if (self.last_update is None or
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timezone.now() - self.last_update >= self.time_unknown):
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return self.UNKNOWN
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return self.OPENED if self.is_open else self.CLOSED
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def admin_status(self, status=None):
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if status is None:
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status = self.status()
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if status == self.CLOSED and self.raw_open:
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return self.FAKE_CLOSED
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return status
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def _export(self):
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"""Export internal state.
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Used by WS initialization and updates.
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Returns:
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(tuple): (base, team)
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- team for team users.
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- base for others.
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"""
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status = self.status()
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base = {
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'status': status,
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}
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restrict = {
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'admin_status': self.admin_status(status),
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'force_close': self.force_close,
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}
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return base, {**base, **restrict}
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def export(self, user):
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"""Export internal state for a given user.
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Returns:
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(dict): Internal state. Only variables visible for the user are
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exported, according to its permissions.
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"""
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base, team = self._export()
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return team if kfet_is_team(user) else base
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def send_ws(self):
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"""Send internal state to websocket channels."""
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from .consumers import OpenKfetConsumer
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base, team = self._export()
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OpenKfetConsumer.group_send('kfet.open.base', base)
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OpenKfetConsumer.group_send('kfet.open.team', team)
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kfet_open = OpenKfet()
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