import 'package:flutter_custom_calendar/constants/constants.dart';
import 'package:flutter_custom_calendar/model/date_model.dart';
import 'package:flutter_custom_calendar/utils/date_util.dart';
import 'package:flutter_custom_calendar/utils/solar_term_util.dart';
/**
* 农历的工具类
*/
class LunarUtil {
static List<int> LUNAR_MONTH_DAYS = [
1887,
0x1694,
0x16aa,
0x4ad5,
0xab6,
0xc4b7,
0x4ae,
0xa56,
0xb52a,
0x1d2a,
0xd54,
0x75aa,
0x156a,
0x1096d,
0x95c,
0x14ae,
0xaa4d,
0x1a4c,
0x1b2a,
0x8d55,
0xad4,
0x135a,
0x495d,
0x95c,
0xd49b,
0x149a,
0x1a4a,
0xbaa5,
0x16a8,
0x1ad4,
0x52da,
0x12b6,
0xe937,
0x92e,
0x1496,
0xb64b,
0xd4a,
0xda8,
0x95b5,
0x56c,
0x12ae,
0x492f,
0x92e,
0xcc96,
0x1a94,
0x1d4a,
0xada9,
0xb5a,
0x56c,
0x726e,
0x125c,
0xf92d,
0x192a,
0x1a94,
0xdb4a,
0x16aa,
0xad4,
0x955b,
0x4ba,
0x125a,
0x592b,
0x152a,
0xf695,
0xd94,
0x16aa,
0xaab5,
0x9b4,
0x14b6,
0x6a57,
0xa56,
0x1152a,
0x1d2a,
0xd54,
0xd5aa,
0x156a,
0x96c,
0x94ae,
0x14ae,
0xa4c,
0x7d26,
0x1b2a,
0xeb55,
0xad4,
0x12da,
0xa95d,
0x95a,
0x149a,
0x9a4d,
0x1a4a,
0x11aa5,
0x16a8,
0x16d4,
0xd2da,
0x12b6,
0x936,
0x9497,
0x1496,
0x1564b,
0xd4a,
0xda8,
0xd5b4,
0x156c,
0x12ae,
0xa92f,
0x92e,
0xc96,
0x6d4a,
0x1d4a,
0x10d65,
0xb58,
0x156c,
0xb26d,
0x125c,
0x192c,
0x9a95,
0x1a94,
0x1b4a,
0x4b55,
0xad4,
0xf55b,
0x4ba,
0x125a,
0xb92b,
0x152a,
0x1694,
0x96aa,
0x15aa,
0x12ab5,
0x974,
0x14b6,
0xca57,
0xa56,
0x1526,
0x8e95,
0xd54,
0x15aa,
0x49b5,
0x96c,
0xd4ae,
0x149c,
0x1a4c,
0xbd26,
0x1aa6,
0xb54,
0x6d6a,
0x12da,
0x1695d,
0x95a,
0x149a,
0xda4b,
0x1a4a,
0x1aa4,
0xbb54,
0x16b4,
0xada,
0x495b,
0x936,
0xf497,
0x1496,
0x154a,
0xb6a5,
0xda4,
0x15b4,
0x6ab6,
0x126e,
0x1092f,
0x92e,
0xc96,
0xcd4a,
0x1d4a,
0xd64,
0x956c,
0x155c,
0x125c,
0x792e,
0x192c,
0xfa95,
0x1a94,
0x1b4a,
0xab55,
0xad4,
0x14da,
0x8a5d,
0xa5a,
0x1152b,
0x152a,
0x1694,
0xd6aa,
0x15aa,
0xab4,
0x94ba,
0x14b6,
0xa56,
0x7527,
0xd26,
0xee53,
0xd54,
0x15aa,
0xa9b5,
0x96c,
0x14ae,
0x8a4e,
0x1a4c,
0x11d26,
0x1aa4,
0x1b54,
0xcd6a,
0xada,
0x95c,
0x949d,
0x149a,
0x1a2a,
0x5b25,
0x1aa4,
0xfb52,
0x16b4,
0xaba,
0xa95b,
0x936,
0x1496,
0x9a4b,
0x154a,
0x136a5,
0xda4,
0x15ac
];
static List<int> SOLAR = [
1887,
0xec04c,
0xec23f,
0xec435,
0xec649,
0xec83e,
0xeca51,
0xecc46,
0xece3a,
0xed04d,
0xed242,
0xed436,
0xed64a,
0xed83f,
0xeda53,
0xedc48,
0xede3d,
0xee050,
0xee244,
0xee439,
0xee64d,
0xee842,
0xeea36,
0xeec4a,
0xeee3e,
0xef052,
0xef246,
0xef43a,
0xef64e,
0xef843,
0xefa37,
0xefc4b,
0xefe41,
0xf0054,
0xf0248,
0xf043c,
0xf0650,
0xf0845,
0xf0a38,
0xf0c4d,
0xf0e42,
0xf1037,
0xf124a,
0xf143e,
0xf1651,
0xf1846,
0xf1a3a,
0xf1c4e,
0xf1e44,
0xf2038,
0xf224b,
0xf243f,
0xf2653,
0xf2848,
0xf2a3b,
0xf2c4f,
0xf2e45,
0xf3039,
0xf324d,
0xf3442,
0xf3636,
0xf384a,
0xf3a3d,
0xf3c51,
0xf3e46,
0xf403b,
0xf424e,
0xf4443,
0xf4638,
0xf484c,
0xf4a3f,
0xf4c52,
0xf4e48,
0xf503c,
0xf524f,
0xf5445,
0xf5639,
0xf584d,
0xf5a42,
0xf5c35,
0xf5e49,
0xf603e,
0xf6251,
0xf6446,
0xf663b,
0xf684f,
0xf6a43,
0xf6c37,
0xf6e4b,
0xf703f,
0xf7252,
0xf7447,
0xf763c,
0xf7850,
0xf7a45,
0xf7c39,
0xf7e4d,
0xf8042,
0xf8254,
0xf8449,
0xf863d,
0xf8851,
0xf8a46,
0xf8c3b,
0xf8e4f,
0xf9044,
0xf9237,
0xf944a,
0xf963f,
0xf9853,
0xf9a47,
0xf9c3c,
0xf9e50,
0xfa045,
0xfa238,
0xfa44c,
0xfa641,
0xfa836,
0xfaa49,
0xfac3d,
0xfae52,
0xfb047,
0xfb23a,
0xfb44e,
0xfb643,
0xfb837,
0xfba4a,
0xfbc3f,
0xfbe53,
0xfc048,
0xfc23c,
0xfc450,
0xfc645,
0xfc839,
0xfca4c,
0xfcc41,
0xfce36,
0xfd04a,
0xfd23d,
0xfd451,
0xfd646,
0xfd83a,
0xfda4d,
0xfdc43,
0xfde37,
0xfe04b,
0xfe23f,
0xfe453,
0xfe648,
0xfe83c,
0xfea4f,
0xfec44,
0xfee38,
0xff04c,
0xff241,
0xff436,
0xff64a,
0xff83e,
0xffa51,
0xffc46,
0xffe3a,
0x10004e,
0x100242,
0x100437,
0x10064b,
0x100841,
0x100a53,
0x100c48,
0x100e3c,
0x10104f,
0x101244,
0x101438,
0x10164c,
0x101842,
0x101a35,
0x101c49,
0x101e3d,
0x102051,
0x102245,
0x10243a,
0x10264e,
0x102843,
0x102a37,
0x102c4b,
0x102e3f,
0x103053,
0x103247,
0x10343b,
0x10364f,
0x103845,
0x103a38,
0x103c4c,
0x103e42,
0x104036,
0x104249,
0x10443d,
0x104651,
0x104846,
0x104a3a,
0x104c4e,
0x104e43,
0x105038,
0x10524a,
0x10543e,
0x105652,
0x105847,
0x105a3b,
0x105c4f,
0x105e45,
0x106039,
0x10624c,
0x106441,
0x106635,
0x106849,
0x106a3d,
0x106c51,
0x106e47,
0x10703c,
0x10724f,
0x107444,
0x107638,
0x10784c,
0x107a3f,
0x107c53,
0x107e48
];
/**
* 保存每年24节气
*/
static final Map<int, List<String>> SOLAR_TERMS = new Map();
/**
* 公历节日
*/
static List<String> SOLAR_CALENDAR = [
"0101元旦",
"0214情人节",
"0308妇女节",
"0312植树节",
"0315消权日",
"0401愚人节",
"0422地球日",
"0501劳动节",
"0504青年节",
"0601儿童节",
"0701建党节",
"0801建军节",
"0910教师节",
"1001国庆节",
"1031万圣节",
"1111光棍节",
"1224平安夜",
"1225圣诞节",
];
/**
* 传统农历节日
*/
static List<String> TRADITION_FESTIVAL_STR = [
"除夕",
"0101春节",
"0115元宵",
"0505端午",
"0707七夕",
"0815中秋",
"0909重阳",
];
/**
* 特殊节日、母亲节和父亲节,感恩节等
*/
static final Map<int, List<String>> SPECIAL_FESTIVAL = new Map();
/**
* 特殊节日的数组
*/
static List<String> SPECIAL_FESTIVAL_STR = [
"母亲节",
"父亲节",
"感恩节",
];
/**
* 用来表示1900年到2099年间农历年份的相关信息，共24位bit的16进制表示，其中：
* 1. 前4位表示该年闰哪个月；
* 2. 5-17位表示农历年份13个月的大小月分布，0表示小，1表示大；
* 3. 最后7位表示农历年首（正月初一）对应的公历日期。
* <p/>
* 以2014年的数据0x955ABF为例说明：
* 1001 0101 0101 1010 1011 1111
* 闰九月 农历正月初一对应公历1月31号
*/
static final List<int> LUNAR_INFO = [
0x84B6BF,
/*1900*/
0x04AE53,
0x0A5748,
0x5526BD,
0x0D2650,
0x0D9544,
0x46AAB9,
0x056A4D,
0x09AD42,
0x24AEB6,
0x04AE4A,
/*1901-1910*/
0x6A4DBE,
0x0A4D52,
0x0D2546,
0x5D52BA,
0x0B544E,
0x0D6A43,
0x296D37,
0x095B4B,
0x749BC1,
0x049754,
/*1911-1920*/
0x0A4B48,
0x5B25BC,
0x06A550,
0x06D445,
0x4ADAB8,
0x02B64D,
0x095742,
0x2497B7,
0x04974A,
0x664B3E,
/*1921-1930*/
0x0D4A51,
0x0EA546,
0x56D4BA,
0x05AD4E,
0x02B644,
0x393738,
0x092E4B,
0x7C96BF,
0x0C9553,
0x0D4A48,
/*1931-1940*/
0x6DA53B,
0x0B554F,
0x056A45,
0x4AADB9,
0x025D4D,
0x092D42,
0x2C95B6,
0x0A954A,
0x7B4ABD,
0x06CA51,
/*1941-1950*/
0x0B5546,
0x555ABB,
0x04DA4E,
0x0A5B43,
0x352BB8,
0x052B4C,
0x8A953F,
0x0E9552,
0x06AA48,
0x6AD53C,
/*1951-1960*/
0x0AB54F,
0x04B645,
0x4A5739,
0x0A574D,
0x052642,
0x3E9335,
0x0D9549,
0x75AABE,
0x056A51,
0x096D46,
/*1961-1970*/
0x54AEBB,
0x04AD4F,
0x0A4D43,
0x4D26B7,
0x0D254B,
0x8D52BF,
0x0B5452,
0x0B6A47,
0x696D3C,
0x095B50,
/*1971-1980*/
0x049B45,
0x4A4BB9,
0x0A4B4D,
0xAB25C2,
0x06A554,
0x06D449,
0x6ADA3D,
0x0AB651,
0x095746,
0x5497BB,
/*1981-1990*/
0x04974F,
0x064B44,
0x36A537,
0x0EA54A,
0x86B2BF,
0x05AC53,
0x0AB647,
0x5936BC,
0x092E50,
0x0C9645,
/*1991-2000*/
0x4D4AB8,
0x0D4A4C,
0x0DA541,
0x25AAB6,
0x056A49,
0x7AADBD,
0x025D52,
0x092D47,
0x5C95BA,
0x0A954E,
/*2001-2010*/
0x0B4A43,
0x4B5537,
0x0AD54A,
0x955ABF,
0x04BA53,
0x0A5B48,
0x652BBC,
0x052B50,
0x0A9345,
0x474AB9,
/*2011-2020*/
0x06AA4C,
0x0AD541,
0x24DAB6,
0x04B64A,
0x6a573D,
0x0A4E51,
0x0D2646,
0x5E933A,
0x0D534D,
0x05AA43,
/*2021-2030*/
0x36B537,
0x096D4B,
0xB4AEBF,
0x04AD53,
0x0A4D48,
0x6D25BC,
0x0D254F,
0x0D5244,
0x5DAA38,
0x0B5A4C,
/*2031-2040*/
0x056D41,
0x24ADB6,
0x049B4A,
0x7A4BBE,
0x0A4B51,
0x0AA546,
0x5B52BA,
0x06D24E,
0x0ADA42,
0x355B37,
/*2041-2050*/
0x09374B,
0x8497C1,
0x049753,
0x064B48,
0x66A53C,
0x0EA54F,
0x06AA44,
0x4AB638,
0x0AAE4C,
0x092E42,
/*2051-2060*/
0x3C9735,
0x0C9649,
0x7D4ABD,
0x0D4A51,
0x0DA545,
0x55AABA,
0x056A4E,
0x0A6D43,
0x452EB7,
0x052D4B,
/*2061-2070*/
0x8A95BF,
0x0A9553,
0x0B4A47,
0x6B553B,
0x0AD54F,
0x055A45,
0x4A5D38,
0x0A5B4C,
0x052B42,
0x3A93B6,
/*2071-2080*/
0x069349,
0x7729BD,
0x06AA51,
0x0AD546,
0x54DABA,
0x04B64E,
0x0A5743,
0x452738,
0x0D264A,
0x8E933E,
/*2081-2090*/
0x0D5252,
0x0DAA47,
0x66B53B,
0x056D4F,
0x04AE45,
0x4A4EB9,
0x0A4D4C,
0x0D1541,
0x2D92B5 /*2091-2099*/
];
/**
* 初始化各种农历、节日
*
* @param calendar calendar
*/
static void setupLunarCalendar(DateModel dateModel) {
int year = dateModel.year;
int month = dateModel.month;
int day = dateModel.day;
// dateModel.isWeekend = DateUtil.isWeekend(new DateTime(year, month, day));
// dateModel.isLeapYear = DateUtil.isLeapYear(year);
// dateModel.isCurrentDay = DateUtil.isCurrentDay(year, month, day);
List<int> lunar = LunarUtil.solarToLunar(2020, 2, day);
// dateModel.lunarYear = (lunar[0]);
// dateModel.lunarMonth = (lunar[1]);
// dateModel.lunarDay = (lunar[2]);
// if (lunar[3] == 1) {
// //如果是闰月
// dateModel.leapMonth = lunar[1];
// }
//24节气
// String solarTerm = getSolarTerm(year, month, day);
// dateModel.solarTerm=solarTerm;
// //公历节日
// String gregorian = gregorianFestival(month, day);
// dateModel.gregorianFestival=gregorian;
// //传统农历节日
// String festival = getTraditionFestival(lunar[0], lunar[1], lunar[2]);
// dateModel.traditionFestival=festival;
//农历格式的日期
String lunarText = numToChinese(lunar[1], lunar[2], lunar[3]);
// if (gregorian.isEmpty) {
// gregorian = getSpecialFestival(year, month, day);
// }
// if (solarTerm.isNotEmpty) {
// dateModel.lunarString = solarTerm;
// } else if (gregorian.isNotEmpty) {
// dateModel.lunarString = gregorian;
// } else if (festival.isNotEmpty) {
// dateModel.lunarString = festival;
// } else {
// dateModel.lunarString = lunarText;
// }
}
/**
* 公历转农历 Solar To Lunar
*
* @param year 公历年
* @param month 公历月
* @param day 公历日
* @return [0]农历年 [1]农历月 [2]农历日 [3]是否闰月 0 false : 1 true
*/
static List<int> solarToLunar(int year, int month, int day) {
List<int> lunarInt = new List(4);
int index = year - SOLAR[0];
int data = (year << 9) | (month << 5) | (day);
int solar11;
if (SOLAR[index] > data) {
index--;
}
solar11 = SOLAR[index];
int y = getBitInt(solar11, 12, 9);
int m = getBitInt(solar11, 4, 5);
int d = getBitInt(solar11, 5, 0);
int offset = solarToInt(year, month, day) - solarToInt(y, m, d);
int days = LUNAR_MONTH_DAYS[index];
int leap = getBitInt(days, 4, 13);
int lunarY = index + SOLAR[0];
int lunarM = 1;
int lunarD;
offset += 1;
for (int i = 0; i < 13; i++) {
int dm = getBitInt(days, 1, 12 - i) == 1 ? 30 : 29;
if (offset > dm) {
lunarM++;
offset -= dm;
} else {
break;
}
}
lunarD = offset;
lunarInt[0] = lunarY;
lunarInt[1] = lunarM;
lunarInt[3] = 0;
if (leap != 0 && lunarM > leap) {
lunarInt[1] = lunarM - 1;
if (lunarM == leap + 1) {
lunarInt[3] = 1;
}
}
lunarInt[2] = lunarD;
return lunarInt;
}
static int getBitInt(int data, int length, int shift) {
return (data & (((1 << length) - 1) << shift)) >> shift;
}
static int solarToInt(int y, int m, int d) {
m = (m + 9) % 12;
y = y - (m / 10).toInt();
return (365 * y +
(y / 4).toInt() -
(y / 100).toInt() +
(y / 400).toInt() +
((m * 306 + 5) / 10).toInt() +
(d - 1));
}
/**
* 返回24节气
*
* @param year 年
* @param month 月
* @param day 日
* @return 返回24节气
*/
static String getSolarTerm(int year, int month, int day) {
if (!SOLAR_TERMS.containsKey(year)) {
SOLAR_TERMS.addAll({year: SolarTermUtil.getSolarTerms(year)});
}
List<String> solarTerm = SOLAR_TERMS[year];
String text = "${year}" + getString(month, day);
String solar = "";
for (String solarTermName in solarTerm) {
if (solarTermName.contains(text)) {
solar = solarTermName.replaceAll(text, "");
break;
}
}
return solar;
}
/**
* 数字转换为农历节日或者日期
*
* @param month 月
* @param day 日
* @param leap 1==闰月
* @return 数字转换为汉字日
*/
static String numToChinese(int month, int day, int leap) {
if (day == 1) {
return numToChineseMonth(month, leap);
}
return CalendarConstants.LUNAR_DAY_TEXT[day - 1];
}
/**
* 数字转换为汉字月份
*
* @param month 月
* @param leap 1==闰月
* @return 数字转换为汉字月份
*/
static String numToChineseMonth(int month, int leap) {
if (leap == 1) {
return "闰" + CalendarConstants.LUNAR_MONTH_TEXT[month - 1];
}
return CalendarConstants.LUNAR_MONTH_TEXT[month - 1];
}
static String getString(int month, int day) {
return (month >= 10 ? month.toString() : "0$month") +
(day >= 10 ? day.toString() : "0$day");
}
/**
* 获取公历节日
*
* @param month 公历月份
* @param day 公历日期
* @return 公历节日
*/
static String gregorianFestival(int month, int day) {
String text = getString(month, day);
String solar = "";
for (String aMSolarCalendar in SOLAR_CALENDAR) {
if (aMSolarCalendar.contains(text)) {
solar = aMSolarCalendar.replaceAll(text, "");
break;
}
}
return solar;
}
/**
* 返回传统农历节日
*
* @param year 农历年
* @param month 农历月
* @param day 农历日
* @return 返回传统农历节日
*/
static String getTraditionFestival(int year, int month, int day) {
if (month == 12) {
int count = daysInLunarMonth(year, month);
if (day == count) {
return TRADITION_FESTIVAL_STR[0]; //除夕
}
}
String text = getString(month, day);
String festivalStr = "";
for (String festival in TRADITION_FESTIVAL_STR) {
if (festival.contains(text)) {
festivalStr = festival.replaceAll(text, "");
break;
}
}
return festivalStr;
}
/**
* 传回农历 year年month月的总天数，总共有13个月包括闰月
*
* @param year 将要计算的年份
* @param month 将要计算的月份
* @return 传回农历 year年month月的总天数
*/
static int daysInLunarMonth(int year, int month) {
if ((LUNAR_INFO[year - 1900] & (0x100000 >> month)) == 0)
return 29;
else
return 30;
}
/**
* 获取特殊计算方式的节日
* 如：每年五月的第二个星期日为母亲节，六月的第三个星期日为父亲节
* 每年11月第四个星期四定为"感恩节"
*
* @param year year
* @param month month
* @param day day
* @return 获取西方节日
*/
static String getSpecialFestival(int year, int month, int day) {
if (!SPECIAL_FESTIVAL.containsKey(year)) {
SPECIAL_FESTIVAL.addAll({year: getSpecialFestivals(year)});
}
List<String> specialFestivals = SPECIAL_FESTIVAL[year];
String text = "$year" + getString(month, day);
String solar = "";
for (String special in specialFestivals) {
if (special.contains(text)) {
solar = special.replaceAll(text, "");
break;
}
}
return solar;
}
/**
* 获取每年的母亲节和父亲节和感恩节
* 特殊计算方式的节日
*
* @param year 年
* @return 获取每年的母亲节和父亲节、感恩节
*/
static List<String> getSpecialFestivals(int year) {
List<String> festivals = new List(3);
DateTime dateTime = new DateTime(year, 5, 1);
//母亲节
int week = (dateTime.weekday + 1) % 8;
int startDiff = 7 - week + 1;
if (startDiff == 7) {
festivals[0] =
dateToString(year, 5, startDiff + 1) + SPECIAL_FESTIVAL_STR[0];
} else {
festivals[0] =
dateToString(year, 5, startDiff + 7 + 1) + SPECIAL_FESTIVAL_STR[0];
}
//父亲节
dateTime = new DateTime(year, 6, 1);
week = (dateTime.weekday + 1) % 8;
startDiff = 7 - week + 1;
if (startDiff == 7) {
festivals[1] =
dateToString(year, 6, startDiff + 7 + 1) + SPECIAL_FESTIVAL_STR[1];
} else {
festivals[1] = dateToString(year, 6, startDiff + 7 + 7 + 1) +
SPECIAL_FESTIVAL_STR[1];
}
//感恩节
dateTime = new DateTime(year, 11, 1);
week = (dateTime.weekday + 1) % 8;
startDiff = 7 - week + 1;
if (startDiff <= 2) {
festivals[2] =
dateToString(year, 11, startDiff + 21 + 5) + SPECIAL_FESTIVAL_STR[2];
} else {
festivals[2] =
dateToString(year, 11, startDiff + 14 + 5) + SPECIAL_FESTIVAL_STR[2];
}
return festivals;
}
static String dateToString(int year, int month, int day) {
return "$year" + getString(month, day);
}
}