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Current File : /srv/modoboa/env/lib/python3.5/site-packages/django/utils//dateformat.py
"""
PHP date() style date formatting
See http://www.php.net/date for format strings

Usage:
>>> import datetime
>>> d = datetime.datetime.now()
>>> df = DateFormat(d)
>>> print(df.format('jS F Y H:i'))
7th October 2003 11:39
>>>
"""
import calendar
import datetime
import re
import time

from django.utils.dates import (
    MONTHS, MONTHS_3, MONTHS_ALT, MONTHS_AP, WEEKDAYS, WEEKDAYS_ABBR,
)
from django.utils.timezone import get_default_timezone, is_aware, is_naive
from django.utils.translation import gettext as _

re_formatchars = re.compile(r'(?<!\\)([aAbBcdDeEfFgGhHiIjlLmMnNoOPrsStTUuwWyYzZ])')
re_escaped = re.compile(r'\\(.)')


class Formatter:
    def format(self, formatstr):
        pieces = []
        for i, piece in enumerate(re_formatchars.split(str(formatstr))):
            if i % 2:
                if type(self.data) is datetime.date and hasattr(TimeFormat, piece):
                    raise TypeError(
                        "The format for date objects may not contain "
                        "time-related format specifiers (found '%s')." % piece
                    )
                pieces.append(str(getattr(self, piece)()))
            elif piece:
                pieces.append(re_escaped.sub(r'\1', piece))
        return ''.join(pieces)


class TimeFormat(Formatter):

    def __init__(self, obj):
        self.data = obj
        self.timezone = None

        # We only support timezone when formatting datetime objects,
        # not date objects (timezone information not appropriate),
        # or time objects (against established django policy).
        if isinstance(obj, datetime.datetime):
            if is_naive(obj):
                self.timezone = get_default_timezone()
            else:
                self.timezone = obj.tzinfo

    def a(self):
        "'a.m.' or 'p.m.'"
        if self.data.hour > 11:
            return _('p.m.')
        return _('a.m.')

    def A(self):
        "'AM' or 'PM'"
        if self.data.hour > 11:
            return _('PM')
        return _('AM')

    def B(self):
        "Swatch Internet time"
        raise NotImplementedError('may be implemented in a future release')

    def e(self):
        """
        Timezone name.

        If timezone information is not available, return an empty string.
        """
        if not self.timezone:
            return ""

        try:
            if hasattr(self.data, 'tzinfo') and self.data.tzinfo:
                return self.data.tzname() or ''
        except NotImplementedError:
            pass
        return ""

    def f(self):
        """
        Time, in 12-hour hours and minutes, with minutes left off if they're
        zero.
        Examples: '1', '1:30', '2:05', '2'
        Proprietary extension.
        """
        if self.data.minute == 0:
            return self.g()
        return '%s:%s' % (self.g(), self.i())

    def g(self):
        "Hour, 12-hour format without leading zeros; i.e. '1' to '12'"
        if self.data.hour == 0:
            return 12
        if self.data.hour > 12:
            return self.data.hour - 12
        return self.data.hour

    def G(self):
        "Hour, 24-hour format without leading zeros; i.e. '0' to '23'"
        return self.data.hour

    def h(self):
        "Hour, 12-hour format; i.e. '01' to '12'"
        return '%02d' % self.g()

    def H(self):
        "Hour, 24-hour format; i.e. '00' to '23'"
        return '%02d' % self.G()

    def i(self):
        "Minutes; i.e. '00' to '59'"
        return '%02d' % self.data.minute

    def O(self):  # NOQA: E743
        """
        Difference to Greenwich time in hours; e.g. '+0200', '-0430'.

        If timezone information is not available, return an empty string.
        """
        if not self.timezone:
            return ""

        seconds = self.Z()
        if seconds == "":
            return ""
        sign = '-' if seconds < 0 else '+'
        seconds = abs(seconds)
        return "%s%02d%02d" % (sign, seconds // 3600, (seconds // 60) % 60)

    def P(self):
        """
        Time, in 12-hour hours, minutes and 'a.m.'/'p.m.', with minutes left off
        if they're zero and the strings 'midnight' and 'noon' if appropriate.
        Examples: '1 a.m.', '1:30 p.m.', 'midnight', 'noon', '12:30 p.m.'
        Proprietary extension.
        """
        if self.data.minute == 0 and self.data.hour == 0:
            return _('midnight')
        if self.data.minute == 0 and self.data.hour == 12:
            return _('noon')
        return '%s %s' % (self.f(), self.a())

    def s(self):
        "Seconds; i.e. '00' to '59'"
        return '%02d' % self.data.second

    def T(self):
        """
        Time zone of this machine; e.g. 'EST' or 'MDT'.

        If timezone information is not available, return an empty string.
        """
        if not self.timezone:
            return ""

        name = None
        try:
            name = self.timezone.tzname(self.data)
        except Exception:
            # pytz raises AmbiguousTimeError during the autumn DST change.
            # This happens mainly when __init__ receives a naive datetime
            # and sets self.timezone = get_default_timezone().
            pass
        if name is None:
            name = self.format('O')
        return str(name)

    def u(self):
        "Microseconds; i.e. '000000' to '999999'"
        return '%06d' % self.data.microsecond

    def Z(self):
        """
        Time zone offset in seconds (i.e. '-43200' to '43200'). The offset for
        timezones west of UTC is always negative, and for those east of UTC is
        always positive.

        If timezone information is not available, return an empty string.
        """
        if not self.timezone:
            return ""

        try:
            offset = self.timezone.utcoffset(self.data)
        except Exception:
            # pytz raises AmbiguousTimeError during the autumn DST change.
            # This happens mainly when __init__ receives a naive datetime
            # and sets self.timezone = get_default_timezone().
            return ""

        # `offset` is a datetime.timedelta. For negative values (to the west of
        # UTC) only days can be negative (days=-1) and seconds are always
        # positive. e.g. UTC-1 -> timedelta(days=-1, seconds=82800, microseconds=0)
        # Positive offsets have days=0
        return offset.days * 86400 + offset.seconds


class DateFormat(TimeFormat):
    year_days = [None, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334]

    def b(self):
        "Month, textual, 3 letters, lowercase; e.g. 'jan'"
        return MONTHS_3[self.data.month]

    def c(self):
        """
        ISO 8601 Format
        Example : '2008-01-02T10:30:00.000123'
        """
        return self.data.isoformat()

    def d(self):
        "Day of the month, 2 digits with leading zeros; i.e. '01' to '31'"
        return '%02d' % self.data.day

    def D(self):
        "Day of the week, textual, 3 letters; e.g. 'Fri'"
        return WEEKDAYS_ABBR[self.data.weekday()]

    def E(self):
        "Alternative month names as required by some locales. Proprietary extension."
        return MONTHS_ALT[self.data.month]

    def F(self):
        "Month, textual, long; e.g. 'January'"
        return MONTHS[self.data.month]

    def I(self):  # NOQA: E743
        "'1' if Daylight Savings Time, '0' otherwise."
        try:
            if self.timezone and self.timezone.dst(self.data):
                return '1'
            else:
                return '0'
        except Exception:
            # pytz raises AmbiguousTimeError during the autumn DST change.
            # This happens mainly when __init__ receives a naive datetime
            # and sets self.timezone = get_default_timezone().
            return ''

    def j(self):
        "Day of the month without leading zeros; i.e. '1' to '31'"
        return self.data.day

    def l(self):  # NOQA: E743
        "Day of the week, textual, long; e.g. 'Friday'"
        return WEEKDAYS[self.data.weekday()]

    def L(self):
        "Boolean for whether it is a leap year; i.e. True or False"
        return calendar.isleap(self.data.year)

    def m(self):
        "Month; i.e. '01' to '12'"
        return '%02d' % self.data.month

    def M(self):
        "Month, textual, 3 letters; e.g. 'Jan'"
        return MONTHS_3[self.data.month].title()

    def n(self):
        "Month without leading zeros; i.e. '1' to '12'"
        return self.data.month

    def N(self):
        "Month abbreviation in Associated Press style. Proprietary extension."
        return MONTHS_AP[self.data.month]

    def o(self):
        "ISO 8601 year number matching the ISO week number (W)"
        return self.data.isocalendar()[0]

    def r(self):
        "RFC 5322 formatted date; e.g. 'Thu, 21 Dec 2000 16:01:07 +0200'"
        return self.format('D, j M Y H:i:s O')

    def S(self):
        "English ordinal suffix for the day of the month, 2 characters; i.e. 'st', 'nd', 'rd' or 'th'"
        if self.data.day in (11, 12, 13):  # Special case
            return 'th'
        last = self.data.day % 10
        if last == 1:
            return 'st'
        if last == 2:
            return 'nd'
        if last == 3:
            return 'rd'
        return 'th'

    def t(self):
        "Number of days in the given month; i.e. '28' to '31'"
        return '%02d' % calendar.monthrange(self.data.year, self.data.month)[1]

    def U(self):
        "Seconds since the Unix epoch (January 1 1970 00:00:00 GMT)"
        if isinstance(self.data, datetime.datetime) and is_aware(self.data):
            return int(calendar.timegm(self.data.utctimetuple()))
        else:
            return int(time.mktime(self.data.timetuple()))

    def w(self):
        "Day of the week, numeric, i.e. '0' (Sunday) to '6' (Saturday)"
        return (self.data.weekday() + 1) % 7

    def W(self):
        "ISO-8601 week number of year, weeks starting on Monday"
        # Algorithm from http://www.personal.ecu.edu/mccartyr/ISOwdALG.txt
        jan1_weekday = self.data.replace(month=1, day=1).weekday() + 1
        weekday = self.data.weekday() + 1
        day_of_year = self.z()
        if day_of_year <= (8 - jan1_weekday) and jan1_weekday > 4:
            if jan1_weekday == 5 or (jan1_weekday == 6 and calendar.isleap(self.data.year - 1)):
                week_number = 53
            else:
                week_number = 52
        else:
            if calendar.isleap(self.data.year):
                i = 366
            else:
                i = 365
            if (i - day_of_year) < (4 - weekday):
                week_number = 1
            else:
                j = day_of_year + (7 - weekday) + (jan1_weekday - 1)
                week_number = j // 7
                if jan1_weekday > 4:
                    week_number -= 1
        return week_number

    def y(self):
        "Year, 2 digits; e.g. '99'"
        return str(self.data.year)[2:]

    def Y(self):
        "Year, 4 digits; e.g. '1999'"
        return self.data.year

    def z(self):
        """Day of the year, i.e. 1 to 366."""
        doy = self.year_days[self.data.month] + self.data.day
        if self.L() and self.data.month > 2:
            doy += 1
        return doy


def format(value, format_string):
    "Convenience function"
    df = DateFormat(value)
    return df.format(format_string)


def time_format(value, format_string):
    "Convenience function"
    tf = TimeFormat(value)
    return tf.format(format_string)

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