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FileManDateTimeUtil.py
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FileManDateTimeUtil.py
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#---------------------------------------------------------------------------
# Copyright 2013-2019 The Open Source Electronic Health Record Alliance
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#---------------------------------------------------------------------------
from __future__ import print_function
import re
from datetime import datetime, date, time
def fmDtToPyDt(fileManDt):
""" convert fileman time to Python datetime
return None if format is not valid
"""
# check to see if datetime is valid or not
validFmt = re.compile('^(?P<date>[0-9]{6,})(?P<time>\.[0-9]{0,6})?$')
result = validFmt.search(fileManDt)
if result:
datePart = result.group('date')
timePart = result.group('time')
if not datePart:
return None # must at least have a date part
if len(datePart) < 7:
datePart = datePart.ljust(7,'0')
try:
year = int(datePart[0:-4])
month = int(datePart[-4:-2])
if month == 0:
month = 1
day = int(datePart[-2:])
if day == 0:
day = 1
outDate = date(year + 1700, month, day)
except ValueError:
return None
outTime = time()
if timePart and timePart[1:]: # has some time part here
timePart = timePart[1:].ljust(6,'0')
hour = int(timePart[0:2])
if hour == 24: # special handling for mid-night
outTime = time(23,59,59)
else:
minute = int(timePart[2:4])
second = int(timePart[-2:])
if minute == 60:
minute = 59
second = 59
elif second == 60:
second = 59
try:
outTime = time(hour, minute, second)
except ValueError:
return None
return datetime.combine(outDate, outTime)
return None