feat: expose complete Iranian reporting periods
This commit is contained in:
203
internal/analytics/periods.go
Normal file
203
internal/analytics/periods.go
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@@ -0,0 +1,203 @@
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package analytics
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import (
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"fmt"
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"strings"
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"time"
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)
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var jalaliBreaks = [...]int{-61, 9, 38, 199, 426, 686, 756, 818, 1111, 1181, 1210, 1635, 2060, 2097, 2192, 2262, 2324, 2394, 2456, 3178}
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var jalaliMonthNames = [...]string{
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"فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور",
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"مهر", "آبان", "آذر", "دی", "بهمن", "اسفند",
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}
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var persianSeasonNames = [...]string{"بهار", "تابستان", "پاییز", "زمستان"}
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type jalaliCalculation struct {
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leap int
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gy int
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march int
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}
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func jalaliCalendar(jy int) jalaliCalculation {
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gy := jy + 621
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leapJ := -14
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jp := jalaliBreaks[0]
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jump := 0
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for index := 1; index < len(jalaliBreaks); index++ {
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jm := jalaliBreaks[index]
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jump = jm - jp
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if jy < jm {
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break
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}
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leapJ += jump/33*8 + (jump%33)/4
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jp = jm
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}
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n := jy - jp
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leapJ += n/33*8 + (n%33+3)/4
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if jump%33 == 4 && jump-n == 4 {
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leapJ++
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}
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leapG := gy/4 - ((gy/100+1)*3)/4 - 150
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march := 20 + leapJ - leapG
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if jump-n < 6 {
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n = n - jump + (jump+4)/33*33
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}
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leap := ((n+1)%33 - 1) % 4
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if leap == -1 {
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leap = 4
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}
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return jalaliCalculation{leap: leap, gy: gy, march: march}
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}
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func gregorianDayNumber(gy, gm, gd int) int {
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d := ((gy+(gm-8)/6+100100)*1461)/4 + (153*((gm+9)%12)+2)/5 + gd - 34840408
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d = d - (((gy+100100+(gm-8)/6)/100)*3)/4 + 752
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return d
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}
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func gregorianFromDayNumber(dayNumber int) (int, int, int) {
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j := 4*dayNumber + 139361631
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j = j + (((4*dayNumber+183187720)/146097)*3/4)*4 - 3908
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i := ((j % 1461) / 4 * 5) + 308
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gd := (i%153)/5 + 1
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gm := (i/153)%12 + 1
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gy := j/1461 - 100100 + (8-gm)/6
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return gy, gm, gd
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}
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func jalaliDayNumber(jy, jm, jd int) int {
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calculation := jalaliCalendar(jy)
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return gregorianDayNumber(calculation.gy, 3, calculation.march) + (jm-1)*31 - (jm/7)*(jm-7) + jd - 1
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}
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func jalaliToGregorian(jy, jm, jd int) (int, int, int) {
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return gregorianFromDayNumber(jalaliDayNumber(jy, jm, jd))
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}
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func gregorianToJalali(gy, gm, gd int) (int, int, int) {
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jy := gy - 621
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calculation := jalaliCalendar(jy)
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dayNumber := gregorianDayNumber(gy, gm, gd)
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firstFarvardin := gregorianDayNumber(gy, 3, calculation.march)
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k := dayNumber - firstFarvardin
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if k >= 0 {
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if k <= 185 {
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return jy, 1 + k/31, k%31 + 1
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}
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k -= 186
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} else {
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jy--
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k += 179
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if calculation.leap == 1 {
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k++
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}
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}
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return jy, 7 + k/30, k%30 + 1
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}
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func jalaliDate(jy, jm, jd int, location *time.Location) time.Time {
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gy, gm, gd := jalaliToGregorian(jy, jm, jd)
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return time.Date(gy, time.Month(gm), gd, 0, 0, 0, 0, location)
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}
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func previousJalaliMonth(jy, jm int) (int, int) {
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jm--
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if jm == 0 {
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return jy - 1, 12
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}
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return jy, jm
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}
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func nextJalaliMonth(jy, jm int) (int, int) {
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jm++
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if jm == 13 {
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return jy + 1, 1
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}
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return jy, jm
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}
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func latestCompletePeriods(datasetStart, datasetMax time.Time, location *time.Location) []Period {
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localStart := datasetStart.In(location)
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localMax := datasetMax.In(location)
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datasetStartDay := time.Date(localStart.Year(), localStart.Month(), localStart.Day(), 0, 0, 0, 0, location)
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dayStart := time.Date(localMax.Year(), localMax.Month(), localMax.Day(), 0, 0, 0, 0, location)
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datasetEnd := dayStart.AddDate(0, 0, 1)
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weekEnd := datasetEnd
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for weekEnd.Weekday() != time.Saturday {
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weekEnd = weekEnd.AddDate(0, 0, -1)
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}
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weekStart := weekEnd.AddDate(0, 0, -7)
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jy, jm, _ := gregorianToJalali(localMax.Year(), int(localMax.Month()), localMax.Day())
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monthStart := jalaliDate(jy, jm, 1, location)
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nextYear, nextMonth := nextJalaliMonth(jy, jm)
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monthEnd := jalaliDate(nextYear, nextMonth, 1, location)
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if monthEnd.After(datasetEnd) {
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jy, jm = previousJalaliMonth(jy, jm)
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monthStart = jalaliDate(jy, jm, 1, location)
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nextYear, nextMonth = nextJalaliMonth(jy, jm)
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monthEnd = jalaliDate(nextYear, nextMonth, 1, location)
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}
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seasonStartMonth := ((jm-1)/3)*3 + 1
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seasonYear := jy
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seasonStart := jalaliDate(seasonYear, seasonStartMonth, 1, location)
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seasonEndYear, seasonEndMonth := seasonYear, seasonStartMonth+3
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if seasonEndMonth > 12 {
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seasonEndYear++
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seasonEndMonth -= 12
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}
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seasonEnd := jalaliDate(seasonEndYear, seasonEndMonth, 1, location)
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if seasonEnd.After(datasetEnd) {
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seasonStartMonth -= 3
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if seasonStartMonth < 1 {
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seasonYear--
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seasonStartMonth += 12
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}
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seasonStart = jalaliDate(seasonYear, seasonStartMonth, 1, location)
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seasonEndYear, seasonEndMonth = seasonYear, seasonStartMonth+3
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if seasonEndMonth > 12 {
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seasonEndYear++
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seasonEndMonth -= 12
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}
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seasonEnd = jalaliDate(seasonEndYear, seasonEndMonth, 1, location)
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}
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dayJY, dayJM, dayJD := gregorianToJalali(dayStart.Year(), int(dayStart.Month()), dayStart.Day())
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weekEndJY, weekEndJM, weekEndJD := gregorianToJalali(weekEnd.AddDate(0, 0, -1).Year(), int(weekEnd.AddDate(0, 0, -1).Month()), weekEnd.AddDate(0, 0, -1).Day())
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weekStartJY, weekStartJM, weekStartJD := gregorianToJalali(weekStart.Year(), int(weekStart.Month()), weekStart.Day())
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periods := []Period{
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newPeriod("d-"+dayStart.Format(time.DateOnly), "DAY", dayStart, datasetEnd,
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fmt.Sprintf("روز %s %s %s", persianNumber(dayJD), jalaliMonthNames[dayJM-1], persianNumber(dayJY)), false),
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newPeriod("w-"+weekStart.Format(time.DateOnly), "WEEK", weekStart, weekEnd,
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fmt.Sprintf("هفته %s %s تا %s %s", persianNumber(weekStartJD), jalaliMonthNames[weekStartJM-1], persianNumber(weekEndJD), jalaliMonthNames[weekEndJM-1]), false),
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newPeriod(fmt.Sprintf("jm-%04d-%02d", jy, jm), "JALALI_MONTH", monthStart, monthEnd,
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fmt.Sprintf("%s %s", jalaliMonthNames[jm-1], persianNumber(jy)), true),
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newPeriod(fmt.Sprintf("ps-%04d-%02d", seasonYear, seasonStartMonth), "PERSIAN_SEASON", seasonStart, seasonEnd,
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fmt.Sprintf("%s %s", persianSeasonNames[(seasonStartMonth-1)/3], persianNumber(seasonYear)), false),
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}
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for index := range periods {
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periods[index].IsComplete = !periods[index].LocalStartAt.Before(datasetStartDay)
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}
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_ = weekEndJY
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_ = weekStartJY
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return periods
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}
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func newPeriod(id, kind string, localStart, localEnd time.Time, label string, isDefault bool) Period {
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return Period{
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PeriodID: id, PeriodType: kind, StartAt: localStart.UTC(), EndAt: localEnd.UTC(),
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LocalStartAt: localStart, LocalEndAt: localEnd, Timezone: "Asia/Tehran",
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JalaliLabelFA: label, IsComplete: true, IsDefault: isDefault,
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}
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}
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func persianNumber(value int) string {
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replacer := strings.NewReplacer("0", "۰", "1", "۱", "2", "۲", "3", "۳", "4", "۴", "5", "۵", "6", "۶", "7", "۷", "8", "۸", "9", "۹")
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return replacer.Replace(fmt.Sprint(value))
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}
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