53 lines
1.8 KiB
Python
53 lines
1.8 KiB
Python
from typing import Optional
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from platypush.backend import Backend
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from platypush.context import get_plugin
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from platypush.message.event.foursquare import FoursquareCheckinEvent
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class FoursquareBackend(Backend):
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"""
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This backend polls for new check-ins on the user's Foursquare account and triggers an event when a new check-in
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occurs.
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Requires:
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* The :class:`platypush.plugins.foursquare.FoursquarePlugin` plugin configured and enabled.
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Triggers:
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- :class:`platypush.message.event.foursquare.FoursquareCheckinEvent` when a new check-in occurs.
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"""
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_last_created_at_varname = '_foursquare_checkin_last_created_at'
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def __init__(self, poll_seconds: Optional[float] = 60.0, *args, **kwargs):
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"""
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:param poll_seconds: How often the backend should check for new check-ins (default: one minute).
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"""
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super().__init__(*args, poll_seconds=poll_seconds, **kwargs)
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self._last_created_at = None
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def __enter__(self):
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self._last_created_at = int(get_plugin('variable').get(self._last_created_at_varname).
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output.get(self._last_created_at_varname) or 0)
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self.logger.info('Started Foursquare backend')
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def loop(self):
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checkins = get_plugin('foursquare').get_checkins().output
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if not checkins:
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return
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last_checkin = checkins[0]
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last_checkin_created_at = last_checkin.get('createdAt', 0)
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if self._last_created_at and last_checkin_created_at <= self._last_created_at:
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return
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self.bus.post(FoursquareCheckinEvent(checkin=last_checkin))
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self._last_created_at = last_checkin_created_at
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get_plugin('variable').set(**{self._last_created_at_varname: self._last_created_at})
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# vim:sw=4:ts=4:et:
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