ews_sync_loop.py

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
from nylas.sync.types.ews import EWSResponseShape

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()
state = None

while True:
    print(state)
    print('')
    item_change_collection_generator = adaptor.sync_folder_items(
        adaptor._exlib_account.calendar.folder_id,
        EWSResponseShape.AllProperties,
        state,
        max_changes=1)

    has_changes = False
    for change in item_change_collection_generator:
        if isinstance(change, str):
            state = change
            break
        else:
            has_changes = True

    if not has_changes:
        state = None  # start over, re-sync forever