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75 lines
2.6 KiB
Python
75 lines
2.6 KiB
Python
from datetime import date, datetime, time, timedelta
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import pytz
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from notifications_utils.timezones import convert_bst_to_utc
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def get_months_for_financial_year(year):
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return [
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convert_bst_to_utc(month) for month in (
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get_months_for_year(4, 13, year)
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+ get_months_for_year(1, 4, year + 1)
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)
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if convert_bst_to_utc(month) < datetime.now()
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]
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def get_months_for_year(start, end, year):
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return [datetime(year, month, 1) for month in range(start, end)]
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def get_financial_year(year):
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return get_april_fools(year), get_april_fools(year + 1) - timedelta(microseconds=1)
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def get_current_financial_year():
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now = datetime.utcnow()
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current_month = int(now.strftime('%-m'))
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current_year = int(now.strftime('%Y'))
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year = current_year if current_month > 3 else current_year - 1
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return get_financial_year(year)
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def get_april_fools(year):
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"""
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This function converts the start of the financial year April 1, 00:00 as BST (British Standard Time) to UTC,
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the tzinfo is lastly removed from the datetime because the database stores the timestamps without timezone.
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:param year: the year to calculate the April 1, 00:00 BST for
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:return: the datetime of April 1 for the given year, for example 2016 = 2016-03-31 23:00:00
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"""
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return pytz.timezone('Europe/London').localize(datetime(year, 4, 1, 0, 0, 0)).astimezone(pytz.UTC).replace(
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tzinfo=None)
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def get_month_start_and_end_date_in_utc(month_year):
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"""
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This function return the start and date of the month_year as UTC,
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:param month_year: the datetime to calculate the start and end date for that month
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:return: start_date, end_date, month
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"""
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import calendar
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_, num_days = calendar.monthrange(month_year.year, month_year.month)
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first_day = datetime(month_year.year, month_year.month, 1, 0, 0, 0)
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last_day = datetime(month_year.year, month_year.month, num_days, 23, 59, 59, 99999)
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return convert_bst_to_utc(first_day), convert_bst_to_utc(last_day)
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def get_current_financial_year_start_year():
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now = datetime.now()
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financial_year_start = now.year
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start_date, end_date = get_financial_year(now.year)
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if now < start_date:
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financial_year_start = financial_year_start - 1
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return financial_year_start
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def get_financial_year_for_datetime(start_date):
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if type(start_date) == date:
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start_date = datetime.combine(start_date, time.min)
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year = int(start_date.strftime('%Y'))
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if start_date < get_april_fools(year):
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return year - 1
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else:
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return year
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