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import typing
import pendulum
from pendulum.utils._compat import decode
from ..locales.locale import Locale
class DifferenceFormatter(object):
"""
Handles formatting differences in text.
"""
def __init__(self, locale="en"):
self._locale = Locale.load(locale)
def format(
self, diff, is_now=True, absolute=False, locale=None
): # type: (pendulum.Period, bool, bool, typing.Optional[str]) -> str
"""
Formats a difference.
:param diff: The difference to format
:type diff: pendulum.period.Period
:param is_now: Whether the difference includes now
:type is_now: bool
:param absolute: Whether it's an absolute difference or not
:type absolute: bool
:param locale: The locale to use
:type locale: str or None
:rtype: str
"""
if locale is None:
locale = self._locale
else:
locale = Locale.load(locale)
count = diff.remaining_seconds
if diff.years > 0:
unit = "year"
count = diff.years
if diff.months > 6:
count += 1
elif diff.months == 11 and (diff.weeks * 7 + diff.remaining_days) > 15:
unit = "year"
count = 1
elif diff.months > 0:
unit = "month"
count = diff.months
if (diff.weeks * 7 + diff.remaining_days) >= 27:
count += 1
elif diff.weeks > 0:
unit = "week"
count = diff.weeks
if diff.remaining_days > 3:
count += 1
elif diff.remaining_days > 0:
unit = "day"
count = diff.remaining_days
if diff.hours >= 22:
count += 1
elif diff.hours > 0:
unit = "hour"
count = diff.hours
elif diff.minutes > 0:
unit = "minute"
count = diff.minutes
elif 10 < diff.remaining_seconds <= 59:
unit = "second"
count = diff.remaining_seconds
else:
# We check if the "a few seconds" unit exists
time = locale.get("custom.units.few_second")
if time is not None:
if absolute:
return time
key = "custom"
is_future = diff.invert
if is_now:
if is_future:
key += ".from_now"
else:
key += ".ago"
else:
if is_future:
key += ".after"
else:
key += ".before"
return locale.get(key).format(time)
else:
unit = "second"
count = diff.remaining_seconds
if count == 0:
count = 1
if absolute:
key = "translations.units.{}".format(unit)
else:
is_future = diff.invert
if is_now:
# Relative to now, so we can use
# the CLDR data
key = "translations.relative.{}".format(unit)
if is_future:
key += ".future"
else:
key += ".past"
else:
# Absolute comparison
# So we have to use the custom locale data
# Checking for special pluralization rules
key = "custom.units_relative"
if is_future:
key += ".{}.future".format(unit)
else:
key += ".{}.past".format(unit)
trans = locale.get(key)
if not trans:
# No special rule
time = locale.get(
"translations.units.{}.{}".format(unit, locale.plural(count))
).format(count)
else:
time = trans[locale.plural(count)].format(count)
key = "custom"
if is_future:
key += ".after"
else:
key += ".before"
return locale.get(key).format(decode(time))
key += ".{}".format(locale.plural(count))
return decode(locale.get(key).format(count))
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