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/*
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* World Calendars
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* https://github.com/alexcjohnson/world-calendars
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*
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* Batch-converted from kbwood/calendars
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* Many thanks to Keith Wood and all of the contributors to the original project!
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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/* http://keith-wood.name/calendars.html
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Persian calendar for jQuery v2.0.2.
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Written by Keith Wood (wood.keith{at}optusnet.com.au) August 2009.
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Available under the MIT (http://keith-wood.name/licence.html) license.
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Please attribute the author if you use it. */
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var main = require('../main');
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var assign = require('object-assign');
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/** Implementation of the Persian or Jalali calendar.
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Based on code from <a href="http://www.iranchamber.com/calendar/converter/iranian_calendar_converter.php">http://www.iranchamber.com/calendar/converter/iranian_calendar_converter.php</a>.
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See also <a href="http://en.wikipedia.org/wiki/Iranian_calendar">http://en.wikipedia.org/wiki/Iranian_calendar</a>.
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@class PersianCalendar
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@param [language=''] {string} The language code (default English) for localisation. */
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function PersianCalendar(language) {
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this.local = this.regionalOptions[language || ''] || this.regionalOptions[''];
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}
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PersianCalendar.prototype = new main.baseCalendar;
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assign(PersianCalendar.prototype, {
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/** The calendar name.
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@memberof PersianCalendar */
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name: 'Persian',
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/** Julian date of start of Persian epoch: 19 March 622 CE.
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@memberof PersianCalendar */
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jdEpoch: 1948320.5,
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/** Days per month in a common year.
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@memberof PersianCalendar */
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daysPerMonth: [31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29],
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/** <code>true</code> if has a year zero, <code>false</code> if not.
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@memberof PersianCalendar */
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hasYearZero: false,
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/** The minimum month number.
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@memberof PersianCalendar */
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minMonth: 1,
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/** The first month in the year.
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@memberof PersianCalendar */
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firstMonth: 1,
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/** The minimum day number.
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@memberof PersianCalendar */
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minDay: 1,
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/** Localisations for the plugin.
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Entries are objects indexed by the language code ('' being the default US/English).
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Each object has the following attributes.
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@memberof PersianCalendar
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@property name {string} The calendar name.
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@property epochs {string[]} The epoch names.
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@property monthNames {string[]} The long names of the months of the year.
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@property monthNamesShort {string[]} The short names of the months of the year.
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@property dayNames {string[]} The long names of the days of the week.
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@property dayNamesShort {string[]} The short names of the days of the week.
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@property dayNamesMin {string[]} The minimal names of the days of the week.
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@property dateFormat {string} The date format for this calendar.
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See the options on <a href="BaseCalendar.html#formatDate"><code>formatDate</code></a> for details.
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@property firstDay {number} The number of the first day of the week, starting at 0.
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@property isRTL {number} <code>true</code> if this localisation reads right-to-left. */
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regionalOptions: { // Localisations
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'': {
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name: 'Persian',
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epochs: ['BP', 'AP'],
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monthNames: ['Farvardin', 'Ordibehesht', 'Khordad', 'Tir', 'Mordad', 'Shahrivar',
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'Mehr', 'Aban', 'Azar', 'Day', 'Bahman', 'Esfand'],
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monthNamesShort: ['Far', 'Ord', 'Kho', 'Tir', 'Mor', 'Sha', 'Meh', 'Aba', 'Aza', 'Day', 'Bah', 'Esf'],
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dayNames: ['Yekshambe', 'Doshambe', 'Seshambe', 'Chæharshambe', 'Panjshambe', 'Jom\'e', 'Shambe'],
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dayNamesShort: ['Yek', 'Do', 'Se', 'Chæ', 'Panj', 'Jom', 'Sha'],
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dayNamesMin: ['Ye','Do','Se','Ch','Pa','Jo','Sh'],
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digits: null,
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dateFormat: 'yyyy/mm/dd',
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firstDay: 6,
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isRTL: false
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}
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},
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/** Determine whether this date is in a leap year.
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@memberof PersianCalendar
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@param year {CDate|number} The date to examine or the year to examine.
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@return {boolean} <code>true</code> if this is a leap year, <code>false</code> if not.
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@throws Error if an invalid year or a different calendar used. */
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leapYear: function(year) {
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var date = this._validate(year, this.minMonth, this.minDay, main.local.invalidYear);
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return (((((date.year() - (date.year() > 0 ? 474 : 473)) % 2820) +
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474 + 38) * 682) % 2816) < 682;
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},
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/** Determine the week of the year for a date.
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@memberof PersianCalendar
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@param year {CDate|number} The date to examine or the year to examine.
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@param [month] {number} The month to examine.
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@param [day] {number} The day to examine.
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@return {number} The week of the year.
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@throws Error if an invalid date or a different calendar used. */
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weekOfYear: function(year, month, day) {
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// Find Saturday of this week starting on Saturday
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var checkDate = this.newDate(year, month, day);
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checkDate.add(-((checkDate.dayOfWeek() + 1) % 7), 'd');
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return Math.floor((checkDate.dayOfYear() - 1) / 7) + 1;
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},
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/** Retrieve the number of days in a month.
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@memberof PersianCalendar
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@param year {CDate|number} The date to examine or the year of the month.
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@param [month] {number} The month.
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@return {number} The number of days in this month.
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@throws Error if an invalid month/year or a different calendar used. */
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daysInMonth: function(year, month) {
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var date = this._validate(year, month, this.minDay, main.local.invalidMonth);
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return this.daysPerMonth[date.month() - 1] +
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(date.month() === 12 && this.leapYear(date.year()) ? 1 : 0);
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},
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/** Determine whether this date is a week day.
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@memberof PersianCalendar
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@param year {CDate|number} The date to examine or the year to examine.
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@param [month] {number} The month to examine.
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@param [day] {number} The day to examine.
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@return {boolean} <code>true</code> if a week day, <code>false</code> if not.
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@throws Error if an invalid date or a different calendar used. */
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weekDay: function(year, month, day) {
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return this.dayOfWeek(year, month, day) !== 5;
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},
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/** Retrieve the Julian date equivalent for this date,
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i.e. days since January 1, 4713 BCE Greenwich noon.
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@memberof PersianCalendar
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@param year {CDate|number} The date to convert or the year to convert.
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@param [month] {number} The month to convert.
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@param [day] {number} The day to convert.
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@return {number} The equivalent Julian date.
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@throws Error if an invalid date or a different calendar used. */
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toJD: function(year, month, day) {
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var date = this._validate(year, month, day, main.local.invalidDate);
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year = date.year();
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month = date.month();
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day = date.day();
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var epBase = year - (year >= 0 ? 474 : 473);
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var epYear = 474 + mod(epBase, 2820);
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return day + (month <= 7 ? (month - 1) * 31 : (month - 1) * 30 + 6) +
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Math.floor((epYear * 682 - 110) / 2816) + (epYear - 1) * 365 +
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Math.floor(epBase / 2820) * 1029983 + this.jdEpoch - 1;
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},
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/** Create a new date from a Julian date.
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@memberof PersianCalendar
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@param jd {number} The Julian date to convert.
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@return {CDate} The equivalent date. */
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fromJD: function(jd) {
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jd = Math.floor(jd) + 0.5;
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var depoch = jd - this.toJD(475, 1, 1);
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var cycle = Math.floor(depoch / 1029983);
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var cyear = mod(depoch, 1029983);
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var ycycle = 2820;
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if (cyear !== 1029982) {
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var aux1 = Math.floor(cyear / 366);
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var aux2 = mod(cyear, 366);
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ycycle = Math.floor(((2134 * aux1) + (2816 * aux2) + 2815) / 1028522) + aux1 + 1;
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}
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var year = ycycle + (2820 * cycle) + 474;
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year = (year <= 0 ? year - 1 : year);
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var yday = jd - this.toJD(year, 1, 1) + 1;
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var month = (yday <= 186 ? Math.ceil(yday / 31) : Math.ceil((yday - 6) / 30));
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var day = jd - this.toJD(year, month, 1) + 1;
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return this.newDate(year, month, day);
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}
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});
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// Modulus function which works for non-integers.
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function mod(a, b) {
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return a - (b * Math.floor(a / b));
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}
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// Persian (Jalali) calendar implementation
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main.calendars.persian = PersianCalendar;
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main.calendars.jalali = PersianCalendar;
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