130 lines
3.4 KiB
Go
130 lines
3.4 KiB
Go
// Package date implements functions for converting Gregorian calendar to Geez calander.
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package date
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import (
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"fmt"
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"strconv"
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"strings"
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"time"
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"gday.express/ted/geez/gn"
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)
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type Gdate struct {
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d, m, y int
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}
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// Geezday return a geez date (eg "2024-01-09" to "፴ ታኅሣሥ ፳፻፲፮") taking Gregorian calander date of format yyyy-mm-dd
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func Geezday(date string) Gdate {
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s := Convert(date)
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lst := strings.Split(s, "-")
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g := Gdate{}
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g.d, _ = strconv.Atoi(lst[0])
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g.m, _ = strconv.Atoi(lst[1])
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g.y, _ = strconv.Atoi(lst[2])
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return g
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}
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// Today return a todays date according to Geez calander
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func Today() Gdate {
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t := time.Now()
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ls := strings.Split(t.String(), " ")
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td := ls[0]
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s := Convert(td)
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lst := strings.Split(s, "-")
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g := Gdate{}
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g.d, _ = strconv.Atoi(lst[0])
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g.m, _ = strconv.Atoi(lst[1])
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g.y, _ = strconv.Atoi(lst[2])
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return g
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}
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func (g Gdate) String() string {
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month := []string{"መስከረም", "ጥቅምት", "ኅዳር", "ታኅሣሥ", "ጥር", "የካቲት", "መጋቢት", "ሚያዝያ", "ግንቦት", "ሰኔ", "ሐምሌ", "ነሐሴ", "ጳጉሜ"}
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d := gn.Fmtint(g.d)
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m := month[g.m-1]
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y := gn.Fmtint(g.y)
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str := fmt.Sprintf("%s %s %s", d, m, y)
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return str
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}
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// Convert return a Geez calander date ,take string Gregorian calendar date ("1991-05-24" to 16-9-1983)
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func Convert(date string) string {
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d, _ := time.Parse("2006-01-02", date)
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var z time.Time
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spt := z.AddDate(d.Year()-1, 10, 8) //spt 11 1st day or pagume of geez calander
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f29 := spt.AddDate(0, 0, 112) // return feb 29(leap) or march 1(not leap)
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//dates jan 1 and after
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x := d.AddDate(0, 0, 111)
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if f29.Month() != 2 {
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mm, dd, yy := convert(x)
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str := fmt.Sprintf("%v-%v-%v", dd, mm, yy)
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return str
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}
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//dates b/n ጳጐሜ 6 and jan 1
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if x.YearDay() != 365 && d.Year() != x.Year() {
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mm, dd, yy := convert(x)
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str := fmt.Sprintf("%v-%v-%v", dd, mm, yy)
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return str
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}
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//dates befor ጳጐሜ 6
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if x.YearDay() != 365 {
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x = d.AddDate(0, 0, 112)
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mm, dd, yy := convert(x)
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str := fmt.Sprintf("%v-%v-%v", dd, mm, yy)
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return str
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}
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// Leap day. ጳጐሜ 6
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x = d.AddDate(0, 0, 110)
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_, _, yy := convert(x)
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mm := 13
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dd := 6
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str := fmt.Sprintf("%v-%v-%v", dd, mm, yy)
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return str
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}
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// daysBefore[m] counts the number of days in a non-leap year
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// before month m begins. There is an entry for m=13, counting
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// the number of days before Meskerem of next year (365).
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var daysBefore = [...]int32{
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0,
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30,
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30 + 30,
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30 + 30 + 30,
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30 + 30 + 30 + 30,
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30 + 30 + 30 + 30 + 30,
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30 + 30 + 30 + 30 + 30 + 30,
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30 + 30 + 30 + 30 + 30 + 30 + 30,
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30 + 30 + 30 + 30 + 30 + 30 + 30 + 30,
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30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30,
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30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30,
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30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30,
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30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30,
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30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 30 + 5,
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}
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func convert(x time.Time) (int, int, int) {
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yr := x.Year()
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day := x.YearDay() - 1
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month := int(day / 30)
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end := int(daysBefore[month+1])
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var begin int
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if day >= end {
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month++
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begin = end
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} else {
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begin = int(daysBefore[month])
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}
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month++
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day = day - begin + 1
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if month > 13 {
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month = month - 13
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yr = yr - 7 //geez year
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return month, day, yr
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}
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yr = yr - 8 //geez year
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return month, day, yr
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}
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