countdown

#!/usr/bin/env python3
# countdown -- like 'sleep', but display a running countdown
import argparse
import enum
import re
import sys
import time

sys.path.append(sys.path[0] + "/../lib/python")

from nullroute.string import fmt_duration, parse_duration

# Modes for OSC 9;4
class Progress(enum.IntEnum):
    REMOVE = 0
    NORMAL = 1
    ERROR  = 2
    THROB  = 3
    PAUSED = 4

def out(msg):
    print("\r\033[K%s" % msg, end="", flush=True)

def outprog(mode, value=0):
    print("\033]9;4;%d;%d\033\\" % (mode, value), end="", flush=True)

def _fmt_duration(t):
    return fmt_duration(round(t))

parser = argparse.ArgumentParser()
parser.add_argument("-t", "--taskbar", action="store_true",
                        help="show progress in taskbar")
parser.add_argument("duration", nargs="*",
                        help="countdown duration")
args, rest = parser.parse_known_args()

secs = sum(map(parse_duration, args.duration + rest))

if secs > 0:
    # Positive argument = count down from the specified time to zero
    start = time.time()
    finish = start + secs
    try:
        while time.time() < finish:
            if args.taskbar:
                outprog(Progress.NORMAL, 100 - (secs / (finish - start) * 100))
            out("waiting (%s left) " % _fmt_duration(finish - time.time()))
            next = min(secs, 1)
            secs -= next
            time.sleep(next)
        if args.taskbar:
            outprog(Progress.REMOVE)
        out("done after %s\n" % _fmt_duration(time.time() - start))
    except KeyboardInterrupt:
        if args.taskbar:
            outprog(Progress.REMOVE)
        out("break after %s (%s left)\n" % (_fmt_duration(time.time() - start),
                                            _fmt_duration(finish - time.time())))
        exit(1)
else:
    # Zero or negative argument = count up to infinity
    start = time.time() - abs(secs)
    try:
        while True:
            if args.taskbar:
                outprog(Progress.THROB)
            out("waiting (%s elapsed) " % _fmt_duration(time.time() - start))
            time.sleep(1)
    except KeyboardInterrupt:
        if args.taskbar:
            outprog(Progress.REMOVE)
        out("break after %s\n" % _fmt_duration(time.time() - start))
        exit(1)