# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Rickard Lindberg, Roger Lindberg
#
# This file is part of Timeline.
#
# Timeline is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Timeline is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Timeline. If not, see <http://www.gnu.org/licenses/>.
from timelinelib.calendar.pharaonic.time import PharaonicDelta
from timelinelib.calendar.pharaonic.time import PharaonicTime
FIRST_DAY = 1448638
[docs]class PharaonicDateTime:
[docs] def __init__(self, year, month, day, hour, minute, second):
if not is_valid(year, month, day):
raise ValueError("Invalid pharaonic date %s-%s-%s" % (year, month, day))
self.year = year
self.month = month
self.day = day
self.hour = hour
self.minute = minute
self.second = second
[docs] def __eq__(self, other):
return (isinstance(other, self.__class__) and
self.to_tuple() == other.to_tuple())
[docs] def __ne__(self, other):
return not (self == other)
[docs] @classmethod
def from_ymd(cls, year, month, day):
return cls(year, month, day, 0, 0, 0)
[docs] @classmethod
def from_time(cls, time):
(year, month, day) = julian_day_to_pharaonic_ymd(time.julian_day)
(hour, minute, second) = time.get_time_of_day()
return cls(year, month, day, hour, minute, second)
# the 13th month is considered "inbetween" years so it returns a week number 0
@property
def week_number(self):
if self.month == 13:
return 0
length_of_week = 10
days_into_year = ((self.month - 1)*30) + self.day
if self.day % length_of_week > 0:
return (days_into_year // length_of_week) + 1
return days_into_year // length_of_week
[docs] def is_bc(self):
return self.year <= 0
[docs] def replace(self, year=None, month=None):
if year is None:
year = self.year
if month is None:
month = self.month
return self.__class__(
year,
month,
self.day,
self.hour,
self.minute,
self.second
)
[docs] def days_in_month(self):
return days_in_month(self.year, self.month)
[docs] def to_tuple(self):
return (self.year, self.month, self.day, self.hour, self.minute,
self.second)
[docs] def to_date_tuple(self):
return self.year, self.month, self.day
[docs] def to_time_tuple(self):
return self.hour, self.minute, self.second
[docs] def to_time(self):
days = pharaonic_ymd_to_julian_day(self.year, self.month, self.day)
seconds = self.hour * 60 * 60 + self.minute * 60 + self.second
return PharaonicTime(days, seconds)
[docs] def is_first_day_in_year(self):
return (self.month == 1 and
self.day == 1 and
self.hour == 0 and
self.minute == 0 and
self.second == 0)
[docs] def is_first_of_month(self):
return (self.day == 1 and
self.hour == 0 and
self.minute == 0 and
self.second == 0)
[docs] def __repr__(self):
return "PharaonicDateTime<%d-%02d-%02d %02d:%02d:%02d>" % self.to_tuple()
[docs]def days_in_month(year, month):
if month <= 12:
return 30
else:
return 5
[docs]def is_valid_time(hour, minute, second):
return (
hour >= 0 and hour < 24 and
minute >= 0 and minute < 60 and
second >= 0 and second < 60
)
[docs]def is_valid(year, month, day):
return month >= 1 and month <= 13 and day >= 1 and day <= days_in_month(year, month)
[docs]def julian_day_to_pharaonic_ymd(julian_day):
"""
This calendar calculation was originally published in Explanatory Supplement to the Astronomical Almanac, S.E. Urban and P.K. Seidelman, Eds. (2012). You can purchase the book at uscibooks.com/urban.htm. "15.11 Calendar Conversion Algorithms" from the following pdf is used in the below code. https://aa.usno.navy.mil/publications/docs/c15_usb_online.pdf
"""
if julian_day < PharaonicTime.MIN_JULIAN_DAY:
raise ValueError("pharaonic_day_to_gregorian_ymd only works for julian days >= %d, but was %d" % (PharaonicTime.MIN_JULIAN_DAY, julian_day))
y = 3968
j = 47
m = 0
n = 13
r = 1
p = 365
q = 0
v = 0
u = 1
s = 30
t = 0
w = 0
f = julian_day + j
e = r * f + v
g = (e % p)//r
h = u * g + w
day = ((h % s)//u) + 1
month = (((h // s) + m) % n) + 1
year = (e // p) - y + (n + m - month)//n
return year, month, day
[docs]def pharaonic_ymd_to_julian_day(year, month, day):
"""
Pharaonic year 1 = Julian day 1448638
"""
y = 3968
j = 47
m = 0
n = 13
r = 1
p = 365
q = 0
v = 0
u = 1
s = 30
t = 0
w = 0
h = month - m
g = year + y - (n-h)//n
f = (h - 1 + n) % n
e = (p * g + q)//r + day - 1 -j
julian_day = e + (s * f + t)//u
if julian_day < PharaonicTime.MIN_JULIAN_DAY:
raise ValueError("pharaonic_ymd_to_julian_day only works for julian days >= %d, but was %d" % (PharaonicTime.MIN_JULIAN_DAY, julian_day))
return julian_day