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Diffstat (limited to '')
| -rw-r--r-- | src/plugins/leapsec.py | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/src/plugins/leapsec.py b/src/plugins/leapsec.py new file mode 100644 index 0000000..f04ad8d --- /dev/null +++ b/src/plugins/leapsec.py @@ -0,0 +1,134 @@ +# -*- python -*- +''' +xpybar – xmobar replacement written in python +Copyright © 2014 Mattias Andrée (maandree@member.fsf.org) + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see <http://www.gnu.org/licenses/>. +''' + +import calendar + +from util import * + + +class LeapSeconds: + ''' + Leap second announcement monitor + ''' + + + PRIMARY = 0 + ''' + The leap occurs in a primarily preferred time slot + ''' + + SECONDARY = 1 + ''' + The leap occurs in a secondarily preferred time slot + ''' + + OUT_OF_BAND = 2 + ''' + The leap occurs out of band, not in any preferred time slot + ''' + + + def __init__(self): + ''' + Constructor + ''' + url = 'http://maia.usno.navy.mil/ser7/leapsec.dat' + announcements = spawn_read('wget', url, '-O', '-') + while ' ' in announcements: + announcements = announcements.replace(' ', ' ') + announcements = announcements.replace('= ', '=').replace('=JD ', '=JD') + announcements = [announcement.lstrip().split(' ') for announcement in announcements.split('\n')] + test = lambda announcement : announcement.startswith('TAI-UTC=') or announcement.startswith('UTC-TAI=') + announcements = [announcement[:3] + list(filter(test, announcement)) for announcement in announcements] + MONTHS = { 'JAN' : 1 + , 'FEB' : 2 + , 'MAR' : 3 + , 'APR' : 4 + , 'MAY' : 5 + , 'JUN' : 6 + , 'JUL' : 7 + , 'AUG' : 8 + , 'SEP' : 9 + , 'OCT' : 10 + , 'NOV' : 11 + , 'DEC' : 12 + } + DAYS_OF_MONTHS = [-1, 31, 28, 31, 30, 31, 30, 30, 31, 30, 31, 30, 31] + def translate(announcement): + announcement[0] = int(announcement[0]) + announcement[1] = MONTHS[announcement[1]] + announcement[2] = int(announcement[2]) - 1 + if announcement[3].startswith('TAI-UTC='): + announcement[3] = int(announcement[3].split('=')[1].split('.')[0]) + else: + announcement[3] = -(int(announcement[3].split('=')[1].split('.')[0])) + announcement.append(LeapSeconds.OUT_OF_BAND) + if announcement[2] == 0: + announcement[1] -= 1 + if announcement[1] == 0: + announcement[1] = 12 + announcement[0] -= 1 + announcement[2] = DAYS_OF_MONTHS[announcement[1]] + if announcement[2] == 2: + year = announcement[0] + if ((year % 4 == 0) and not (year % 100 == 0)) or (year % 400 == 0): + announcement[2] += 1 + if announcement[1] in (6, 12): + announcement[4] = LeapSeconds.PRIMARY + elif announcement[1] in (3, 9): + announcement[4] = LeapSeconds.SECONDARY + return announcement + announcements = [translate(announcement) for announcement in announcements] + for i in reversed(range(len(announcements) - 1)): + announcements[i + 1][3] -= announcements[i][3] + self.announcements = announcements[1:] + + + def __len__(self): + ''' + Get the number of available leap second announcements + + @return The number of available leap second announcements + ''' + return len(self.announcements) + + + def __getitem__(self, index): + ''' + Get a leap second announcement + + @param index:int? The index of the announcement, negative for reversed chronological indexing + @return :(year:int, The year the leap second will occur or occurred (UTC) + month:int, The month [1, 12] the leap second will occur or occurred (UTC) + day:int, The day [1, 31] the leap second will occur or occurred (UTC) + posix:int, The POSIX timestamp the leap will occur or occurred. + Keep in mind that POSIX time does not have leap seconds; + if `amount == 1` then this time will represent 00:00:00 at + the day directly after the day described by (`year`, `month`, `day`) + amount:int, The number of leap seconds introduced, can be negative but not zero + annon:int) Annonouncement class, either of: + LeapSeconds.PRIMARY, LeapSeconds.SECONDARY, LeapSeconds.OUT_OF_BAND + ''' + (y, m, d, a, t) = self.announcements[index] + s = 24 * 60 * 60 + a - 1 + if a > 0: + s += 1 + s = calendar.timegm((y, m, d, 0, 0, s)) + return (y, m, d, s, a, t) + |