parse-datetime-micropython.py

parse-datetime-micropython.py

import ure

def parseDateTime(datestr):
    regex = ("^(19|2[0-9][0-9][0-9])-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])"
             "T(0[0-9]|1[0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])(.([0-9]*))?"
             "((\\+|-)[0-1][0-9]:[0-9][0-9])?$")
    match = ure.match(regex, datestr)
    if match:
        year = int(match.group(1))
        month = int(match.group(2))
        day = int(match.group(3))
        hour = int(match.group(4))
        minute = int(match.group(5))
        seconds = int(match.group(6))
        #match.group(7) - milliseconds
        #match.group(8) - timezone
        return (year, month, day, hour, minute, seconds)
    else:
        return None

def dateToUnixTime(tup):
    (year, month, day, hours, minutes, seconds) = tup
    if month <= 2:
        month += 12
        year -= 1
    # Convert years to days
    t = (365 * year) + (year / 4) - (year / 100) + (year / 400)
    # Convert months to days
    t += (30 * month) + (3 * (month + 1) / 5) + day
    # Unix time starts on January 1st, 1970
    t -= 719561
    # Convert days to seconds
    t *= 86400
    # Add hours, minutes and seconds
    t += (3600 * hours) + (60 * minutes) + seconds
    return t

#### EXAMPLES
utime1 = 0
utime2 = 0

datetime = parseDateTime("2018-08-23T22:02:07.249+02:00")
if datetime:
    utime1 = dateToUnixTime(datetime)
    print(utime1)

datetime = parseDateTime("2018-08-23T22:21:00+02:00")
if datetime:
    utime2 = dateToUnixTime(datetime)
    print(utime2)

tdiff_seconds = utime2-utime1
print(str(tdiff_seconds) + " seconds")
tdiff_minutes = round((utime2-utime1)/60)
print(str(tdiff_minutes) + " minutes")