ews_syncback.py

import gevent
from exchangelib import CalendarItem, EWSDateTime, EWSTimeZone
from nylas.db.sharded.models.account import Account
from nylas.db.sharded.models.session import session_scope_by_shard_id
from nylas.sync.adaptors.ews import EWSSyncAdaptor

with session_scope_by_shard_id(0) as db:
    acc = db.query(Account).get(4)  # exchange account, test@nilas.com
    adaptor = EWSSyncAdaptor(acc)

adaptor.authorize_account()

while True:
    tz = EWSTimeZone.localzone()
    event = CalendarItem(
        folder=adaptor._exlib_account.calendar,
        start=tz.localize(EWSDateTime(2018, 4, 6, 10, 0, 0)),
        end=tz.localize(EWSDateTime(2018, 4, 6, 11, 0, 0)),
        subject='Test Item',
        body='hello',
    )
    event.save()
    print('Saved event, sleeping')

    gevent.sleep(1)

    event = [x for x in adaptor.fetch([(event.item_id, None)])][0]
    assert isinstance(event, CalendarItem)
    new_subject = 'New Subject'
    event.subject = new_subject
    event.save()
    print('Saved event with new subject, sleeping')

    gevent.sleep(1)

    event = [x for x in adaptor.fetch([(event.item_id, None)])][0]
    assert isinstance(event, CalendarItem)
    assert event.subject == new_subject
    old_id = event.item_id
    event.delete()
    print('Deleted event, sleeping')

    gevent.sleep(1)

    event = [x for x in adaptor.fetch([(old_id, None)])][0]
    assert not isinstance(event, CalendarItem)
    print('Completed loop')