Add Kurdish weekday support to date conversion and formatting

Introduces a Weekday field to KurdishDate, mapping Go's time.Weekday to Kurdish weekdays (1=Saturday, ..., 7=Friday). Adds Kurdish weekday names, updates formatting to support weekday output, and extends tests to cover the new Weekday field.

Author: rojcode

conversions.go

@@ -32,18 +32,18 @@ func solarHijriToGregorian(sYear, sMonth, sDay int) (gYear, gMonth, gDay int) {
 type Month int
 
 const (
-	Farvardin Month = 1 + iota
-	Ordibehesht
-	Khordad
-	Tir
-	Mordad
-	Shahrivar
-	Mehr
-	Aban
-	Azar
-	Dey
-	Bahman
-	Esfand
+	Khakelive  Month = 1 + iota // خاکه‌لێوه
+	Gulan                       // گوڵان
+	Jozherdan                   // جۆزه‌ردان
+	Pushper                     // پووشپه‌ڕ
+	Gelavizh                    // گه‌لاوێژ
+	Khereman                    // خه‌رمانان
+	Rezber                      // ره‌زبه‌ر
+	Khezhelwer                  // خه‌زه‌ڵوه‌ر
+	Sermavez                    // سه‌رماوه‌ز
+	Befranbar                   // به‌فرانبار
+	Ribendan                    // رێبه‌ندان
+	Resheme                     // ره‌شه‌مێ
 )
 
 // toJalaali converts Gregorian to Jalaali date.

dialects.go

@@ -1,5 +1,17 @@
 package kurdical
 
+// WeekdayNames holds the weekday names for Kurdish (same for all dialects).
+var WeekdayNames = []string{
+	"",          // 0 not used
+	"شەممە",     // Saturday
+	"یەکشەممە",  // Sunday
+	"دووشەممە",  // Monday
+	"سێشەممە",   // Tuesday
+	"چوارشەممە", // Wednesday
+	"پێنجشەممە", // Thursday
+	"هەینی",     // Friday
+}
+
 // monthNames holds the month names for each Kurdish dialect.
 var monthNames = map[Dialect][]string{
 	Laki: {

format.go

@@ -97,6 +97,10 @@ func (k KurdishDate) kAppendFormat(b []byte, layout string) ([]byte, error) {
 			b = appendInt(b, month, 0)
 		case stdZeroMonth:
 			b = appendInt(b, month, 2)
+		case stdWeekDay, stdLongWeekDay:
+			if k.Weekday >= 1 && k.Weekday <= 7 {
+				b = append(b, []byte(WeekdayNames[k.Weekday])...)
+			}
 		case stdDay:
 			b = appendInt(b, day, 0)
 		case stdUnderDay:

kurdical.go

@@ -35,6 +35,7 @@ type KurdishDate struct {
 	Year      int
 	Month     int
 	Day       int
+	Weekday   int // 1=Saturday, 2=Sunday, ..., 7=Friday
 	MonthName string
 	Dialect   Dialect
 	Epoch     Epoch
@@ -52,10 +53,31 @@ func GregorianToKurdish(t time.Time, dialect Dialect, epoch Epoch) KurdishDate {
 	sYear, sMonth, sDay := gregorianToSolarHijri(year, int(month), day)
 	kYear := sYear + epochOffsets[epoch]
 	monthName := monthNames[dialect][sMonth-1]
+
+	// Calculate Kurdish weekday: 1=Saturday, 2=Sunday, ..., 7=Friday
+	weekday := int(t.Weekday())
+	switch weekday {
+	case 0: // Sunday
+		weekday = 2
+	case 1: // Monday
+		weekday = 3
+	case 2: // Tuesday
+		weekday = 4
+	case 3: // Wednesday
+		weekday = 5
+	case 4: // Thursday
+		weekday = 6
+	case 5: // Friday
+		weekday = 7
+	case 6: // Saturday
+		weekday = 1
+	}
+
 	return KurdishDate{
 		Year:      kYear,
 		Month:     sMonth,
 		Day:       sDay,
+		Weekday:   weekday,
 		MonthName: monthName,
 		Dialect:   dialect,
 		Epoch:     epoch,

kurdical_test.go

@@ -23,6 +23,7 @@ func TestGregorianToKurdish(t *testing.T) {
 				Year:      2723,
 				Month:     1,
 				Day:       1,
+				Weekday:   4, // Tuesday
 				MonthName: "خاکه‌لێوه",
 				Dialect:   Sorani,
 				Epoch:     MedianKingdom,
@@ -38,6 +39,7 @@ func TestGregorianToKurdish(t *testing.T) {
 				Year:      2635,
 				Month:     1,
 				Day:       1,
+				Weekday:   4,
 				MonthName: "نیسان",
 				Dialect:   Kurmanji,
 				Epoch:     FallOfNineveh,
@@ -53,6 +55,7 @@ func TestGregorianToKurdish(t *testing.T) {
 				Year:      2723,
 				Month:     1,
 				Day:       1,
+				Weekday:   4,
 				MonthName: "په‌نجه",
 				Dialect:   Laki,
 				Epoch:     MedianKingdom,
@@ -68,6 +71,7 @@ func TestGregorianToKurdish(t *testing.T) {
 				Year:      2723,
 				Month:     1,
 				Day:       1,
+				Weekday:   4,
 				MonthName: "نه‌ورۆز",
 				Dialect:   Hawrami,
 				Epoch:     MedianKingdom,
@@ -83,6 +87,7 @@ func TestGregorianToKurdish(t *testing.T) {
 				Year:      2723,
 				Month:     1,
 				Day:       1,
+				Weekday:   4,
 				MonthName: "جه‌ژنان (جه‌شنان)",
 				Dialect:   Kalhuri,
 				Epoch:     MedianKingdom,
@@ -98,6 +103,7 @@ func TestGregorianToKurdish(t *testing.T) {
 				Year:      2722,
 				Month:     10,
 				Day:       11,
+				Weekday:   2,
 				MonthName: "به‌فرانبار",
 				Dialect:   Sorani,
 				Epoch:     MedianKingdom,
@@ -113,6 +119,7 @@ func TestGregorianToKurdish(t *testing.T) {
 				Year:      2723,
 				Month:     10,
 				Day:       10,
+				Weekday:   2,
 				MonthName: "به‌فرانبار",
 				Dialect:   Sorani,
 				Epoch:     MedianKingdom,
@@ -145,6 +152,7 @@ func TestKurdishToGregorian(t *testing.T) {
 				Year:    2723,
 				Month:   1,
 				Day:     1,
+				Weekday: 4,
 				Dialect: Sorani,
 				Epoch:   MedianKingdom,
 			},