timetracker/common/time.py

77 lines
2.6 KiB
Python

import re
from datetime import datetime, timedelta
from zoneinfo import ZoneInfo
from django.conf import settings
def now() -> datetime:
return datetime.now(ZoneInfo(settings.TIME_ZONE))
def _safe_timedelta(duration: timedelta | int | None):
if duration == None:
return timedelta(0)
elif isinstance(duration, int):
return timedelta(seconds=duration)
elif isinstance(duration, timedelta):
return duration
def format_duration(
duration: timedelta | int | None, format_string: str = "%H hours"
) -> str:
"""
Format timedelta into the specified format_string.
Valid format variables:
- %H hours
- %m minutes
- %s seconds
- %r total seconds
Values don't change into higher units if those units are missing
from the formatting string. For example:
- 61 seconds as "%s" = 61 seconds
- 61 seconds as "%m %s" = 1 minutes 1 seconds"
Format specifiers can include width and precision options:
- %5.2H: hours formatted with width 5 and 2 decimal places (padded with zeros)
"""
minute_seconds = 60
hour_seconds = 60 * minute_seconds
day_seconds = 24 * hour_seconds
safe_duration = _safe_timedelta(duration)
# we don't need float
seconds_total = int(safe_duration.total_seconds())
# timestamps where end is before start
if seconds_total < 0:
seconds_total = 0
days = hours = minutes = seconds = 0
remainder = seconds = seconds_total
if "%d" in format_string:
days, remainder = divmod(seconds_total, day_seconds)
if re.search(r"%\d*\.?\d*H", format_string):
hours_float, remainder = divmod(remainder, hour_seconds)
hours = float(hours_float) + remainder / hour_seconds
if re.search(r"%\d*\.?\d*m", format_string):
minutes, seconds = divmod(remainder, minute_seconds)
literals = {
"d": str(days),
"H": str(hours),
"m": str(minutes),
"s": str(seconds),
"r": str(seconds_total),
}
formatted_string = format_string
for pattern, replacement in literals.items():
# Match format specifiers with optional width and precision
match = re.search(rf"%(\d*\.?\d*){pattern}", formatted_string)
if match:
format_spec = match.group(1)
if format_spec:
# Format the number according to the specifier
replacement = f"{float(replacement):{format_spec}f}"
# Replace the format specifier with the formatted number
formatted_string = re.sub(
rf"%\d*\.?\d*{pattern}", replacement, formatted_string
)
return formatted_string