96 lines
2.6 KiB
Python
96 lines
2.6 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright 2018 Mycroft AI Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# 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, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from datetime import datetime
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from dateutil.tz import gettz, tzlocal
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def default_timezone():
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""" Get the default timezone
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Based on user location settings location.timezone.code or
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the default system value if no setting exists.
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Returns:
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(datetime.tzinfo): Definition of the default timezone
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"""
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try:
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# Obtain from user's configurated settings
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# location.timezone.code (e.g. "America/Chicago")
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# location.timezone.name (e.g. "Central Standard Time")
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# location.timezone.offset (e.g. -21600000)
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from mycroft.configuration import Configuration
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config = Configuration.get()
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code = config["location"]["timezone"]["code"]
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return gettz(code)
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except Exception:
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# Just go with system default timezone
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return tzlocal()
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def now_utc():
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""" Retrieve the current time in UTC
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Returns:
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(datetime): The current time in Universal Time, aka GMT
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"""
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return datetime.utcnow()
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def now_local(tz=None):
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""" Retrieve the current time
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Args:
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tz (datetime.tzinfo, optional): Timezone, default to user's settings
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Returns:
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(datetime): The current time
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"""
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if not tz:
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tz = default_timezone()
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return datetime.now(tz)
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def to_utc(dt):
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""" Convert a datetime with timezone info to a UTC datetime
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Args:
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dt (datetime): A datetime (presumably in some local zone)
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Returns:
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(datetime): time converted to UTC
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"""
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tzUTC = gettz("UTC")
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if dt.tzinfo:
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return dt.astimezone(tzUTC)
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else:
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return dt.replace(tzinfo=gettz("UTC")).astimezone(tzUTC)
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def to_local(dt):
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""" Convert a datetime to the user's local timezone
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Args:
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dt (datetime): A datetime (if no timezone, defaults to UTC)
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Returns:
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(datetime): time converted to the local timezone
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"""
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tz = default_timezone()
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if dt.tzinfo:
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return dt.astimezone(tz)
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else:
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return dt.replace(tzinfo=gettz("UTC")).astimezone(tz)
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