libhdate
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A pure Javascript implementation of libhdate
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/* libhdate - Hebrew calendar library
*
* Copyright (C) 2015 Yaacov Zamir <kobi.zamir@gmail.com>
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
import Hdate = require("./julian");
/**
Return number of hebrew holyday.
@param h The hdate_struct of the date to use.
@param isDiaspora if True give Diaspora holydays
@returns the number of holyday.
*/
export function
hdate_get_holyday (h:Hdate.Hdate, isDiaspora:boolean = false):number
{
var holyday:number = 0;
/* holydays table */
var holydays_table:number[][] =
[
[ /* Tishrey */
1, 2, 3, 3, 0, 0, 0, 0, 37, 4,
0, 0, 0, 0, 5, 31, 6, 6, 6, 6,
7, 27, 8, 0, 0, 0, 0, 0, 0, 0],
[ /* Heshvan */
0, 0, 0, 0, 0, 0, 0, 0, 0, 35,
35, 35, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[ /* Kislev */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 9, 9, 9, 9, 9, 9],
[ /* Tevet */
9, 9, 9, 0, 0, 0, 0, 0, 0, 10,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[ /* Shvat */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 11, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 33],
[ /* Adar */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
12, 0, 12, 13, 14, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[ /* Nisan */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 15, 32, 16, 16, 16, 16,
28, 29, 0, 0, 0, 24, 24, 24, 0, 0],
[ /* Iyar */
0, 17, 17, 17, 17, 17, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 18, 0, 0,
0, 0, 0, 0, 0, 0, 0, 26, 0, 0],
[ /* Sivan */
0, 0, 0, 0, 19, 20, 30, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[ /* Tamuz */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 21, 21, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 36, 36],
[ /* Av */
0, 0, 0, 0, 0, 0, 0, 0, 22, 22,
0, 0, 0, 0, 23, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[ /* Elul */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[ /* Adar 1 */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[ /* Adar 2 */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
12, 0, 12, 13, 14, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
];
/* sanity check */
if (h.hd_mon < 1 || h.hd_mon > 14 || h.hd_day < 1 || h.hd_day > 30)
return 0;
holyday = holydays_table[h.hd_mon - 1][h.hd_day - 1];
/* if tzom on sat delay one day */
/* tzom gdalyaho on sat */
if ((holyday == 3) && (h.hd_dw == 7 || (h.hd_day == 4 && h.hd_dw !=1)))
holyday = 0;
/* 17 of Tamuz on sat */
if ((holyday == 21) && ((h.hd_dw == 7) || (h.hd_day == 18 && h.hd_dw != 1)))
holyday = 0;
/* 9 of Av on sat */
if ((holyday == 22) && ((h.hd_dw == 7) || (h.hd_day == 10 && h.hd_dw != 1)))
holyday = 0;
/* Hanukah in a long year */
if ((holyday == 9) && (h.hd_size_of_year % 10 != 3) && (h.hd_day == 3))
holyday = 0;
/* if tanit ester on sat mov to Thu */
if ((holyday == 12) && ((h.hd_dw == 7) || (h.hd_day == 11 && h.hd_dw != 5)))
holyday = 0;
/* yom yerushalym after 68 */
if (holyday == 26)
{
if (h.gd_year < 1968)
holyday = 0;
}
/* yom ha azmaot and yom ha zicaron */
if (holyday == 17)
{
if (h.gd_year < 1948)
holyday = 0;
else if (h.gd_year < 2004)
{
if ((h.hd_day == 3) && (h.hd_dw == 5))
holyday = 17;
else if ((h.hd_day == 4) && (h.hd_dw == 5))
holyday = 17;
else if ((h.hd_day == 5) && (h.hd_dw != 6 && h.hd_dw != 7))
holyday = 17;
else if ((h.hd_day == 2) && (h.hd_dw == 4))
holyday = 25;
else if ((h.hd_day == 3) && (h.hd_dw == 4))
holyday = 25;
else if ((h.hd_day == 4) && (h.hd_dw != 5 && h.hd_dw != 6))
holyday = 25;
else
holyday = 0;
}
else
{
if ((h.hd_day == 3) && (h.hd_dw == 5))
holyday = 17;
else if ((h.hd_day == 4) && (h.hd_dw == 5))
holyday = 17;
else if ((h.hd_day == 6) && (h.hd_dw == 3))
holyday = 17;
else if ((h.hd_day == 5) && (h.hd_dw != 6 && h.hd_dw != 7 && h.hd_dw != 2))
holyday = 17;
else if ((h.hd_day == 2) && (h.hd_dw == 4))
holyday = 25;
else if ((h.hd_day == 3) && (h.hd_dw == 4))
holyday = 25;
else if ((h.hd_day == 5) && (h.hd_dw == 2))
holyday = 25;
else if ((h.hd_day == 4) && (h.hd_dw != 5 && h.hd_dw != 6 && h.hd_dw != 1))
holyday = 25;
else
holyday = 0;
}
}
/* yom ha shoaa, on years after 1958 */
if (holyday == 24)
{
if (h.gd_year < 1958)
holyday = 0;
else
{
if ((h.hd_day == 26) && (h.hd_dw != 5))
holyday = 0;
if ((h.hd_day == 28) && (h.hd_dw != 2))
holyday = 0;
if ((h.hd_day == 27) && (h.hd_dw == 6 || h.hd_dw == 1))
holyday = 0;
}
}
/* Rabin day, on years after 1997 */
if (holyday == 35)
{
if (h.gd_year < 1997)
holyday = 0;
else
{
if ((h.hd_day == 10 || h.hd_day == 11) && (h.hd_dw != 5))
holyday = 0;
if ((h.hd_day == 12) && (h.hd_dw == 6 || h.hd_dw == 7))
holyday = 0;
}
}
/* Zhabotinsky day, on years after 2005 */
if (holyday == 36)
{
if (h.gd_year < 2005)
holyday = 0;
else
{
if ((h.hd_day == 30) && (h.hd_dw != 1))
holyday = 0;
if ((h.hd_day == 29) && (h.hd_dw == 7))
holyday = 0;
}
}
/* Diaspora holidays */
/* simchat tora only in Diaspora in israel just one day shmini+simchat tora */
if (holyday == 8 && !isDiaspora)
holyday = 0;
/* sukkot II holiday only in Diaspora */
if (holyday == 31 && !isDiaspora)
holyday = 6;
/* pesach II holiday only in Diaspora */
if (holyday == 32 && !isDiaspora)
holyday = 16;
/* shavot II holiday only in Diaspora */
if (holyday == 30 && !isDiaspora)
holyday = 0;
/* pesach VIII holiday only in Diaspora */
if (holyday == 29 && !isDiaspora)
holyday = 0;
return holyday;
}
/**
Return the day in the omer of the given date
@param h The hdate_struct of the date to use.
@returns The day in the omer, starting from 1 (or 0 if not in sfirat ha omer)
*/
export function
hdate_get_omer_day(h:Hdate.Hdate):number
{
var omer_day:number = 0;
var sixteen_nissan:Hdate.Hdate = new Hdate.Hdate();
sixteen_nissan.set_hdate(16, 7, h.hd_year);
omer_day = h.hd_jd - sixteen_nissan.hd_jd + 1;
if ((omer_day > 49) || (omer_day < 0))
omer_day = 0;
return omer_day;
}