class MaxLengthValidator(BaseValidator):
message = ngettext_lazy(
'Ensure this value has at most %(limit_value)d character (it has %(show_value)d).',
'Ensure this value has at most %(limit_value)d characters (it has %(show_value)d).',
'limit_value')
code = 'max_length'
def compare(self, a, b):
return a > b
def clean(self, x):
return len(x)
import calendar
import datetime
from djmodels.utils.html import avoid_wrapping
from djmodels.utils.timezone import is_aware, utc
from djmodels.utils.translation import gettext, ngettext_lazy
TIME_STRINGS = {
'year': ngettext_lazy('%d year', '%d years'),
'month': ngettext_lazy('%d month', '%d months'),
'week': ngettext_lazy('%d week', '%d weeks'),
'day': ngettext_lazy('%d day', '%d days'),
'hour': ngettext_lazy('%d hour', '%d hours'),
'minute': ngettext_lazy('%d minute', '%d minutes'),
}
TIMESINCE_CHUNKS = (
(60 * 60 * 24 * 365, 'year'),
(60 * 60 * 24 * 30, 'month'),
(60 * 60 * 24 * 7, 'week'),
(60 * 60 * 24, 'day'),
(60 * 60, 'hour'),
(60, 'minute'),
)
def timesince(d, now=None, reversed=False, time_strings=None):
"""
Take two datetime objects and return the time between d and now as a nicely
formatted string, e.g. "10 minutes". If d occurs after now, return
"0 minutes".
class DecimalValidator:
"""
Validate that the input does not exceed the maximum number of digits
expected, otherwise raise ValidationError.
"""
messages = {
'invalid':
_('Enter a number.'),
'max_digits':
ngettext_lazy(
'Ensure that there are no more than %(max)s digit in total.',
'Ensure that there are no more than %(max)s digits in total.',
'max'),
'max_decimal_places':
ngettext_lazy(
'Ensure that there are no more than %(max)s decimal place.',
'Ensure that there are no more than %(max)s decimal places.',
'max'),
'max_whole_digits':
ngettext_lazy(
'Ensure that there are no more than %(max)s digit before the decimal point.',
'Ensure that there are no more than %(max)s digits before the decimal point.',
'max'),
}
def __init__(self, max_digits, decimal_places):
self.max_digits = max_digits
self.decimal_places = decimal_places
def __call__(self, value):
digit_tuple, exponent = value.as_tuple()[1:]
if exponent in {'F', 'n', 'N'}:
raise ValidationError(self.messages['invalid'])
if exponent >= 0:
# A positive exponent adds that many trailing zeros.
digits = len(digit_tuple) + exponent
decimals = 0
else:
# If the absolute value of the negative exponent is larger than the
# number of digits, then it's the same as the number of digits,
# because it'll consume all of the digits in digit_tuple and then
# add abs(exponent) - len(digit_tuple) leading zeros after the
# decimal point.
if abs(exponent) > len(digit_tuple):
digits = decimals = abs(exponent)
else:
digits = len(digit_tuple)
decimals = abs(exponent)
whole_digits = digits - decimals
if self.max_digits is not None and digits > self.max_digits:
raise ValidationError(
self.messages['max_digits'],
code='max_digits',
params={'max': self.max_digits},
)
if self.decimal_places is not None and decimals > self.decimal_places:
raise ValidationError(
self.messages['max_decimal_places'],
code='max_decimal_places',
params={'max': self.decimal_places},
)
if (self.max_digits is not None and self.decimal_places is not None
and whole_digits > (self.max_digits - self.decimal_places)):
raise ValidationError(
self.messages['max_whole_digits'],
code='max_whole_digits',
params={'max': (self.max_digits - self.decimal_places)},
)
def __eq__(self, other):
return (isinstance(other, self.__class__)
and self.max_digits == other.max_digits
and self.decimal_places == other.decimal_places)
class ArrayMinLengthValidator(MinLengthValidator):
message = ngettext_lazy(
'List contains %(show_value)d item, it should contain no fewer than %(limit_value)d.',
'List contains %(show_value)d items, it should contain no fewer than %(limit_value)d.',
'limit_value')
class NaturalTimeFormatter:
time_strings = {
# Translators: delta will contain a string like '2 months' or '1 month, 2 weeks'
'past-day':
gettext_lazy('%(delta)s ago'),
# Translators: please keep a non-breaking space (U+00A0) between count
# and time unit.
'past-hour':
ngettext_lazy('an hour ago', '%(count)s hours ago', 'count'),
# Translators: please keep a non-breaking space (U+00A0) between count
# and time unit.
'past-minute':
ngettext_lazy('a minute ago', '%(count)s minutes ago', 'count'),
# Translators: please keep a non-breaking space (U+00A0) between count
# and time unit.
'past-second':
ngettext_lazy('a second ago', '%(count)s seconds ago', 'count'),
'now':
gettext_lazy('now'),
# Translators: please keep a non-breaking space (U+00A0) between count
# and time unit.
'future-second':
ngettext_lazy('a second from now', '%(count)s seconds from now',
'count'),
# Translators: please keep a non-breaking space (U+00A0) between count
# and time unit.
'future-minute':
ngettext_lazy('a minute from now', '%(count)s minutes from now',
'count'),
# Translators: please keep a non-breaking space (U+00A0) between count
# and time unit.
'future-hour':
ngettext_lazy('an hour from now', '%(count)s hours from now', 'count'),
# Translators: delta will contain a string like '2 months' or '1 month, 2 weeks'
'future-day':
gettext_lazy('%(delta)s from now'),
}
past_substrings = {
# Translators: 'naturaltime-past' strings will be included in '%(delta)s ago'
'year': npgettext_lazy('naturaltime-past', '%d year', '%d years'),
'month': npgettext_lazy('naturaltime-past', '%d month', '%d months'),
'week': npgettext_lazy('naturaltime-past', '%d week', '%d weeks'),
'day': npgettext_lazy('naturaltime-past', '%d day', '%d days'),
'hour': npgettext_lazy('naturaltime-past', '%d hour', '%d hours'),
'minute': npgettext_lazy('naturaltime-past', '%d minute',
'%d minutes'),
}
future_substrings = {
# Translators: 'naturaltime-future' strings will be included in '%(delta)s from now'
'year': npgettext_lazy('naturaltime-future', '%d year', '%d years'),
'month': npgettext_lazy('naturaltime-future', '%d month', '%d months'),
'week': npgettext_lazy('naturaltime-future', '%d week', '%d weeks'),
'day': npgettext_lazy('naturaltime-future', '%d day', '%d days'),
'hour': npgettext_lazy('naturaltime-future', '%d hour', '%d hours'),
'minute': npgettext_lazy('naturaltime-future', '%d minute',
'%d minutes'),
}
@classmethod
def string_for(cls, value):
if not isinstance(value, date): # datetime is a subclass of date
return value
now = datetime.now(utc if is_aware(value) else None)
if value < now:
delta = now - value
if delta.days != 0:
return cls.time_strings['past-day'] % {
'delta':
defaultfilters.timesince(
value, now, time_strings=cls.past_substrings),
}
elif delta.seconds == 0:
return cls.time_strings['now']
elif delta.seconds < 60:
return cls.time_strings['past-second'] % {
'count': delta.seconds
}
elif delta.seconds // 60 < 60:
count = delta.seconds // 60
return cls.time_strings['past-minute'] % {'count': count}
else:
count = delta.seconds // 60 // 60
return cls.time_strings['past-hour'] % {'count': count}
else:
delta = value - now
if delta.days != 0:
return cls.time_strings['future-day'] % {
'delta':
defaultfilters.timeuntil(
value, now, time_strings=cls.future_substrings),
}
elif delta.seconds == 0:
return cls.time_strings['now']
elif delta.seconds < 60:
return cls.time_strings['future-second'] % {
'count': delta.seconds
}
elif delta.seconds // 60 < 60:
count = delta.seconds // 60
return cls.time_strings['future-minute'] % {'count': count}
else:
count = delta.seconds // 60 // 60
return cls.time_strings['future-hour'] % {'count': count}