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Update jalaali_js.dart #25

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140 changes: 81 additions & 59 deletions lib/jalaali_js.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -5,24 +5,24 @@ String farsiNumbers(String input) {
input = input.replaceAll("1", "۱");
input = input.replaceAll("2", "۲");
input = input.replaceAll("3", "۳");
input = input.replaceAll("4", "۴");
input = input.replaceAll("5", "۵");
input = input.replaceAll("6", "۶");
input = input.replaceAll("4", "٤");
input = input.replaceAll("5", "٥");
input = input.replaceAll("6", "٦");
input = input.replaceAll("7", "۷");
input = input.replaceAll("8", "۸");
input = input.replaceAll("9", "۹");
return input;
}

String englishNumbers(String input) {
String? englishNumbers(String? input) {
if (input != null) {
input = input.replaceAll("۰", "0");
input = input.replaceAll("۱", "1");
input = input.replaceAll("۲", "2");
input = input.replaceAll("۳", "3");
input = input.replaceAll("۴", "4");
input = input.replaceAll("۵", "5");
input = input.replaceAll("۶", "6");
input = input.replaceAll("٤", "4");
input = input.replaceAll("٥", "5");
input = input.replaceAll("٦", "6");
input = input.replaceAll("۷", "7");
input = input.replaceAll("۸", "8");
input = input.replaceAll("۹", "9");
Expand All @@ -32,33 +32,34 @@ String englishNumbers(String input) {

/// Jalaali
class Jalaali {
int year;
int month;
int day;
int? year;
int? month;
int? day;

int get julianDayNumber {
final r = _JalaaliBreaks.cal(year);
final r = _JalaaliBreaks.cal(year!);

return Gregorian(r.gy, 3, r.march).julianDayNumber +
(month - 1) * 31 -
_div(month, 7) * (month - 7) +
day -
(month! - 1) * 31 -
_div(month!, 7) * (month! - 7) +
day! -
1;
}

Jalaali(this.year, [this.month = 1, this.day = 1]);

factory Jalaali.fromJulianDayNumber(julianDayNumber) {
// Calculate Gregorian year (gy).
int gy = Gregorian.fromJulianDayNumber(julianDayNumber).year;
int gy = Gregorian.fromJulianDayNumber(julianDayNumber).year!;

int jy = gy - 621;
final r = _JalaaliBreaks.cal(jy);
int jdn1f = Gregorian(gy, 3, r.march).julianDayNumber;
int jd, jm, k;
int? jd, jm, k;

// Find number of days that passed since 1 Farvardin.
k = julianDayNumber - jdn1f;
if (k >= 0) {
if (k! >= 0) {
if (k <= 185) {
// The first 6 months.
jm = 1 + _div(k, 31);
Expand Down Expand Up @@ -102,23 +103,23 @@ class Jalaali {

/// Checks whether a Jalaali date is valid or not.
bool isValid() {
return year >= -61 &&
year <= 3177 &&
month >= 1 &&
month <= 12 &&
day >= 1 &&
day <= monthLength;
return year! >= -61 &&
year! <= 3177 &&
month! >= 1 &&
month! <= 12 &&
day! >= 1 &&
day! <= monthLength;
}

/// Checks if a year is a leap year or not.
bool isLeapYear() {
return _JalaaliBreaks.cal(year).leap == 0;
return _JalaaliBreaks.cal(year!).leap == 0;
}

/// Computes number of days in a given month in a Jalaali year.
int get monthLength {
if (month <= 6) return 31;
if (month <= 11) return 30;
if (month! <= 6) return 31;
if (month! <= 11) return 30;
if (isLeapYear()) return 30;
return 29;
}
Expand All @@ -133,13 +134,13 @@ class Jalaali {
/// Gregorian date class
class Gregorian {
/// Gregorian year (years BC numbered 0, -1, -2, ...)
final int year;
final int? year;

/// Gregorian month (1 to 12)
final int month;

/// Gregorian day of the month (1 to 28/29/30/31)
final int day;
final int? day;

/// Calculates the Julian Day number from Gregorian or Julian
/// calendar dates. This integer number corresponds to the noon of
Expand All @@ -148,12 +149,11 @@ class Gregorian {
/// The procedure was tested to be good since 1 March, -100100 (of both
/// calendars) up to a few million years into the future.
int get julianDayNumber {
int d = _div((year + _div(month - 8, 6) + 100100) * 1461, 4) +
int d = _div((year! + _div(month - 8, 6) + 100100) * 1461, 4) +
_div(153 * _mod(month + 9, 12) + 2, 5) +
day -
day! -
34840408;
d = d - _div(_div(year + 100100 + _div(month - 8, 6), 100) * 3, 4) + 752;

d = d - _div(_div(year! + 100100 + _div(month - 8, 6), 100) * 3, 4) + 752;
return d;
}

Expand All @@ -169,13 +169,34 @@ class Gregorian {

j = 4 * julianDayNumber + 139361631;
j = j +
_div(_div(4 * julianDayNumber + 183187720, 146097) * 3, 4) * 4 -
3908;
// _div(_div(4 * julianDayNumber + 183187720, 146097) * 3, 4) * 4 -
// 3908;
// _div(_div(4 * julianDayNumber + 183187720, 146097) * 3, 4) * 4 -
// 65000;
_div(_div(4 * julianDayNumber + 183187720, 146097) * 3, 4) * 3 -
65000;
i = _div(_mod(j, 1461), 4) * 5 + 308;
gd = _div(_mod(i, 153), 5) + 1;
// gd = _div(_mod(i, 153), 5) + 1;
gd = _div(_mod(i, 153), 4) + 2;

gm = _mod(_div(i, 153), 12) + 1;
gy = _div(j, 1461) - 100100 + _div(8 - gm, 6);

// int z = (julianDayNumber + 0.5).floor();
// int a = ((z - 1867216.25) / 36524.25).floor();
// a = z + 1 + a - (a / 4).floor();
// int b = a + 1524;
// int c = ((b - 122.1) / 365.25).floor();
// int d = (365.25 * c).floor();
// int e = ((b - d) / 30.6001).floor();
// int day = b - d - (e * 30.6001).floor();
// //var wd = _gMod(julianDate + 1, 7) + 1;
// int month = e - (e > 13.5 ? 13 : 1);
// int year = c - (month > 2.5 ? 4716 : 4715);
// if (year <= 0) {
// year--;
// } // No year zero
// print("year${year} month${month} day${day}");
return Gregorian(gy, gm, gd);
}

Expand All @@ -190,11 +211,12 @@ class Gregorian {

/// Converts Gregorian date to [DateTime] object
DateTime toDateTime() {
return DateTime(year, month, day);
return DateTime(year!, month, day!);
}

/// Converts a Gregorian date to Jalaali.
Jalaali toJalaali() {
//julianDayNumber
return Jalaali.fromJulianDayNumber(julianDayNumber);
}

Expand All @@ -208,13 +230,13 @@ class Gregorian {
/// Internal class
class _JalaaliBreaks {
/// Number of years since the last leap year (0 to 4)
final int leap;
final int? leap;

/// Gregorian year of the beginning of Jalaali year
final int gy;
final int? gy;

/// The March day of Farvardin the 1st (1st day of jy)
final int march;
final int? march;

_JalaaliBreaks({this.leap, this.gy, this.march});

Expand Down Expand Up @@ -251,7 +273,7 @@ class _JalaaliBreaks {
3178
];

int bl = breaks.length,
int? bl = breaks.length,
gy = jy + 621,
leapJ = -14,
jp = breaks[0],
Expand All @@ -266,19 +288,19 @@ class _JalaaliBreaks {
if (jy < jp || jy >= breaks[bl - 1]) throw 'Invalid Jalaali year $jy';

// Find the limiting years for the Jalaali year jy.
for (i = 1; i < bl; i += 1) {
for (i = 1; i! < bl; i += 1) {
jm = breaks[i];
jump = jm - jp;
jump = jm - jp!;
if (jy < jm) break;
leapJ = leapJ + _div(jump, 33) * 8 + _div(_mod(jump, 33), 4);
leapJ = leapJ! + _div(jump, 33) * 8 + _div(_mod(jump, 33), 4);
jp = jm;
}
n = jy - jp;
n = jy - jp!;

// Find the number of leap years from AD 621 to the beginning
// of the current Jalaali year in the Persian calendar.
leapJ = leapJ + _div(n, 33) * 8 + _div(_mod(n, 33) + 3, 4);
if (_mod(jump, 33) == 4 && jump - n == 4) leapJ += 1;
leapJ = leapJ! + _div(n, 33) * 8 + _div(_mod(n, 33) + 3, 4);
if (_mod(jump!, 33) == 4 && jump - n == 4) leapJ += 1;

// And the same in the Gregorian calendar (until the year gy).
leapG = _div(gy, 4) - _div((_div(gy, 100) + 1) * 3, 4) - 150;
Expand Down Expand Up @@ -394,32 +416,32 @@ String getGregorianMonthName(int month) {
}
}

String getJalaaliMonthName(int month) {
String getJalaaliMonthName(int? month) {
switch (month) {
case 1:
return "فروردین";
return "جماد الثاني";
case 2:
return "اردیبهشت";
return "رجب";
case 3:
return "خرداد";
return "شعبان";
case 4:
return "تیر";
return "رمضان";
case 5:
return "مرداد";
return "شوال";
case 6:
return "شهریور";
return "ذو القعدة";
case 7:
return "مهر";
return "ذو الحجة";
case 8:
return "آبان";
return "محرم";
case 9:
return "آذر";
return "صفر";
case 10:
return "دی";
return "ربيع آول";
case 11:
return "بهمن";
return "ربيع الثاني";
case 12:
return "اسفند";
return "جماد آول";
default:
return "خطا";
}
Expand Down