mii-countdown.py

#!/data/data/com.termux/files/usr/bin/python3
# vim: fileencoding=utf8:filetype=python:nu:ts=2:shiftwidth=2:softtabstop=2:expandtab

__all__ = []

from sys import argv
from time import monotonic, sleep
from math import floor, ceil
from re import compile as compile_, sub

def asSpan (x, u):
  if type(x) is not int or x < 0: return '!'
  x, y = divmod(x, 60)
  r = [ (y, 's') ]
  x, y = divmod(x, 60)
  r.append( (y, 'm') )
  x, y = divmod(x, 24)
  r.append( (y, 'h') )
  r.append( (x, 'd') )
  return ' '.join('{:02d}{}'.format(*i) for i in r[::-1][u:])

def main2 (target, u, label):
  while True:
    x = ceil(target - monotonic())
    if x <= 0:
      output(label + 'Done')
      return
    output(label + asSpan(x, u))
    sleep(0.25)

def main (arg, label='', eol=''):
  arg = filter(None, sub(r'[,\s]+', ',', arg).split(','))
  t = 0
  p = compile_(r'''([0-9]+)([smhd]?)''')
  d = { 's': 1, '': 1, 'm': 60, 'h': 3600, 'd': 86400 }
  for i in arg:
    i, x = p.fullmatch(i).groups()
    t += int(i) * d[x]
  u = -1 - sum( (1 if t >= i else 0) for i in (60, 3600, 86400) )
  if eol: label += '\n'
  del p, d, i, x, eol
  arg = '\aPress [Enter] to re-run with: {}\nUse EOF / Break to exit.\n'.format(asSpan(t, u))
  while True:
    main2(t + monotonic(), u, label)
    input(arg)

def output (text):
  print('\x1b[3J\x1b[H\x1b[m\x1b[2J{}'.format(text), flush=True)

if __name__ == '__main__':
  try:
    main(*argv[1:])
  except Exception as e:
    #raise e
    try:
      print()
    except:
      pass