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1 #!/usr/bin/env python
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2 # -*- coding: utf-8 -*-
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3
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4 """
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5 parse date
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6 """
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7
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8 # imports
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9 import argparse
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10 import calendar
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11 import datetime
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12 import sys
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13 import time
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14 from .formatting import format_table
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15 from dateutil.parser import parse
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16
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17
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18 __all__ = ['main', 'parse_date', 'epoch2local', 'epoch2utc', 'is_dst', 'timezone']
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19
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20
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21 def is_dst(localtime=None):
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22 """returns if daylight savings time is in effect locally"""
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23 return time.localtime(localtime).tm_isdst > 0
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24
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25
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26 def timezone(localtime=None):
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27 """returns name of local timezone"""
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28 return time.tzname[int(is_dst(localtime))]
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29
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30
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31 def epoch2local(datestamp):
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32 """convert epoch to local time"""
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33 return datetime.datetime.fromtimestamp(float(datestamp))
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34
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35
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36 def epoch2utc(datestamp):
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37 """convert epoch to UTC"""
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38 return datetime.datetime.utcfromtimestamp(float(datestamp))
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39
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40
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41 def parse_date(datestamp, utc=False):
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42 """returns seconds since epoch from the supplied date"""
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43
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44 try:
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45 # already epoch timestamp
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46 return float(datestamp)
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47 except ValueError:
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48 pass
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49
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50 # parse the string
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51 parsed_date = parse(datestamp)
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52
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53 # convert this to seconds since epoch
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54 if utc:
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55 return float(calendar.timegm(parsed_date.timetuple()))
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56 else:
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57 return time.mktime(parsed_date.timetuple())
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58
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59
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60 def main(args=sys.argv[1:]):
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61
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62 # parse command line
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63 parser = argparse.ArgumentParser(description=__doc__)
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64 parser.add_argument('date', nargs='+',
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65 help="local date to parse")
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66 parser.add_argument('--utc', dest='utc',
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67 action='store_true', default=False,
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68 help="indicate date is in UTC")
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69 options = parser.parse_args(args)
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70
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71 # parse each date
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72 epochs = [parse_date(d, options.utc) for d in options.date]
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73
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74 # display results
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75 header = ['epoch', 'local', 'UTC']
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76 print (format_table([[d, '{} {}'.format(epoch2local(d), timezone(d)), epoch2utc(d)] for d in epochs],
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77 header=header, joiner='|'))
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78
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79
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80 if __name__ == '__main__':
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81 main()
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