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f10bc6d8fe
* add fallback and validation for report and cron timezones * add logging to exception catch * Run black Co-authored-by: Beto Dealmeida <roberto@dealmeida.net>
51 lines
1.9 KiB
Python
51 lines
1.9 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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import logging
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from datetime import datetime, timedelta, timezone as dt_timezone
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from typing import Iterator
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from croniter import croniter
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from pytz import timezone as pytz_timezone, UnknownTimeZoneError
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from superset import app
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logger = logging.getLogger(__name__)
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def cron_schedule_window(cron: str, timezone: str) -> Iterator[datetime]:
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window_size = app.config["ALERT_REPORTS_CRON_WINDOW_SIZE"]
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# create a time-aware datetime in utc
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time_now = datetime.now(tz=dt_timezone.utc)
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try:
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tz = pytz_timezone(timezone)
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except UnknownTimeZoneError:
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# fallback to default timezone
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tz = pytz_timezone("UTC")
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logger.warning("Timezone %s was invalid. Falling back to 'UTC'", timezone)
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utc = pytz_timezone("UTC")
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# convert the current time to the user's local time for comparison
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time_now = time_now.astimezone(tz)
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start_at = time_now - timedelta(seconds=1)
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stop_at = time_now + timedelta(seconds=window_size)
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crons = croniter(cron, start_at)
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for schedule in crons.all_next(datetime):
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if schedule >= stop_at:
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break
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# convert schedule back to utc
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yield schedule.astimezone(utc).replace(tzinfo=None)
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