Merge pull request #116 from dewkul/feat/th

feat: add thai holidays

v2/th/th_holidays.go

@@ -0,0 +1,201 @@
+// Package th provides holiday definition for Thailand.
+package th
+
+import (
+	"time"
+
+	"github.com/rickar/cal/v2"
+	"github.com/rickar/cal/v2/aa"
+)
+
+var (
+	// Standard weekend substitution rules:
+	// 		Saturdays move to Monday
+	//		Sundays move to Monday
+
+	weekendAlt = []cal.AltDay{
+		{Day: time.Saturday, Offset: 2},
+		{Day: time.Sunday, Offset: 1},
+	}
+
+	// Long weekend substitution rules:
+	// 		Saturdays move to Monday
+	//		Sundays move to Tuesday
+
+	longWeekendAlt = []cal.AltDay{
+		{Day: time.Saturday, Offset: 2},
+		{Day: time.Sunday, Offset: 2},
+	}
+
+	// NewYear represents New Year's Day on 1 Jan
+	NewYear = aa.NewYear.Clone(&cal.Holiday{
+		Name:     "วันขึ้นปีใหม่",
+		Type:     cal.ObservancePublic,
+		Observed: weekendAlt,
+	})
+
+	// ChakriDay represents Chakri Dynasty Memorial Day on 6 Apr
+	ChakriDay = &cal.Holiday{
+		Name:     "วันจักรี",
+		Type:     cal.ObservancePublic,
+		Month:    time.April,
+		Day:      6,
+		Observed: weekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// ElderlyDay represents Songkran and Elderly National Day on 13 Apr
+	ElderlyDay = &cal.Holiday{
+		Name:     "วันมหาสงกรานต์ / วันผู้สูงอายุ",
+		Type:     cal.ObservancePublic,
+		Month:    time.April,
+		Day:      13,
+		Observed: weekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// FamilyDay represents Songkran and Family National Day on 14 Apr
+	FamilyDay = &cal.Holiday{
+		Name:     "วันสงกรานต์ / วันครอบครัวไทย",
+		Type:     cal.ObservancePublic,
+		Month:    time.April,
+		Day:      14,
+		Observed: longWeekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// ThaiNewYear represents Songkran on 15 Apr
+	ThaiNewYear = &cal.Holiday{
+		Name:     "วันสงกรานต์",
+		Type:     cal.ObservancePublic,
+		Month:    time.April,
+		Day:      15,
+		Observed: longWeekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// Songkran is held from 13 Apr to 15 Apr
+	SongKranDays = []*cal.Holiday{
+		ElderlyDay,
+		FamilyDay,
+		ThaiNewYear,
+	}
+
+	// LaborDay represents international worker's day on 1 May
+	LaborDay = aa.WorkersDay.Clone(
+		&cal.Holiday{
+			Name:     "วันแรงงาน",
+			Type:     cal.ObservanceBank,
+			Observed: weekendAlt,
+		},
+	)
+
+	// CoronationDay represents King Rama X's Coronation Day on 4 May
+	CoronationDay = &cal.Holiday{
+		Name:      "วันฉัตรมงคล",
+		Type:      cal.ObservancePublic,
+		Month:     time.May,
+		Day:       4,
+		StartYear: 2019,
+		Observed:  weekendAlt,
+		Func:      cal.CalcDayOfMonth,
+	}
+
+	// QueensBirthday represents Queen Suthida's birthday on 3 June
+	QueensBirthday = &cal.Holiday{
+		Name:      "วันเฉลิมพระชนมพรรษาสมเด็จพระนางเจ้าฯ พระบรมราชินี",
+		Type:      cal.ObservancePublic,
+		Month:     time.June,
+		Day:       3,
+		StartYear: 2019,
+		Observed:  weekendAlt,
+		Func:      cal.CalcDayOfMonth,
+	}
+
+	// KingsBirthday represents King Rama X's birthday on 28 July
+	KingsBirthday = &cal.Holiday{
+		Name:      "วันเฉลิมพระชนมพรรษาพระบาทสมเด็จพระเจ้าอยู่หัว",
+		Type:      cal.ObservancePublic,
+		Month:     time.July,
+		Day:       28,
+		StartYear: 2017,
+		Observed:  weekendAlt,
+		Func:      cal.CalcDayOfMonth,
+	}
+
+	// MothersDay represents Mother National Day on 12 Aug
+	MothersDay = &cal.Holiday{
+		Name:     "วันแม่แห่งชาติ",
+		Type:     cal.ObservancePublic,
+		Month:    time.August,
+		Day:      12,
+		Observed: weekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// KingBhumibolDay represents King Bhumibol Memorial Day on 13 Oct
+	KingBhumibolDay = &cal.Holiday{
+		Name:      "วันคล้ายวันสวรรคต พระบาทสมเด็จพระปรมินทรมหาภูมิพลอดุลยเดชมหาราช",
+		Type:      cal.ObservancePublic,
+		Month:     time.October,
+		Day:       13,
+		Observed:  weekendAlt,
+		StartYear: 2017,
+		Func:      cal.CalcDayOfMonth,
+	}
+
+	// KingChulalongkornDay represents King Chulalongkorn Memorial Day on 23 Oct
+	KingChulalongkornDay = &cal.Holiday{
+		Name:     "วันปิยมหาราช",
+		Type:     cal.ObservancePublic,
+		Month:    time.October,
+		Day:      23,
+		Observed: weekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// FathersDay represents Father's National Day on 5 Dec
+	FathersDay = &cal.Holiday{
+		Name:     "วันพ่อแห่งชาติ",
+		Type:     cal.ObservancePublic,
+		Month:    time.December,
+		Day:      5,
+		Observed: weekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// ConstitutionDay represents Constitution Day on 10 Dec
+	ConstitutionDay = &cal.Holiday{
+		Name:     "วันรัฐธรรมนูญ",
+		Type:     cal.ObservancePublic,
+		Month:    time.December,
+		Day:      10,
+		Observed: weekendAlt,
+		Func:     cal.CalcDayOfMonth,
+	}
+
+	// NewYearEve represents NewYear Eve on 31 Dec
+	NewYearEve = &cal.Holiday{
+		Name:  "วันสิ้นปี",
+		Type:  cal.ObservancePublic,
+		Month: time.December,
+		Day:   31,
+		Func:  cal.CalcDayOfMonth,
+	}
+
+	// Holidays provides a list of the standard national holidays
+	holidays = []*cal.Holiday{
+		NewYear,
+		ChakriDay,
+		CoronationDay,
+		QueensBirthday,
+		KingsBirthday,
+		MothersDay,
+		KingBhumibolDay,
+		KingChulalongkornDay,
+		FathersDay,
+		ConstitutionDay,
+		NewYearEve,
+	}
+	Holidays = append(holidays, SongKranDays...)
+)

v2/th/th_holidays_test.go

@@ -0,0 +1,134 @@
+package th
+
+import (
+	"testing"
+	"time"
+
+	"github.com/rickar/cal/v2"
+)
+
+func d(y, m, d int) time.Time {
+	return time.Date(y, time.Month(m), d, 0, 0, 0, 0, cal.DefaultLoc)
+}
+
+func TestHolidays(t *testing.T) {
+	tests := []struct {
+		h       *cal.Holiday
+		y       int
+		wantAct time.Time
+		wantObs time.Time
+	}{
+		{NewYear, 2017, d(2017, 1, 1), d(2017, 1, 2)},
+		{NewYear, 2018, d(2018, 1, 1), d(2018, 1, 1)},
+		{NewYear, 2019, d(2019, 1, 1), d(2019, 1, 1)},
+		{NewYear, 2020, d(2020, 1, 1), d(2020, 1, 1)},
+		{NewYear, 2021, d(2021, 1, 1), d(2021, 1, 1)},
+		{NewYear, 2022, d(2022, 1, 1), d(2022, 1, 3)},
+		{NewYear, 2023, d(2023, 1, 1), d(2023, 1, 2)},
+		{ChakriDay, 2017, d(2017, 4, 6), d(2017, 4, 6)},
+		{ChakriDay, 2018, d(2018, 4, 6), d(2018, 4, 6)},
+		{ChakriDay, 2019, d(2019, 4, 6), d(2019, 4, 8)},
+		{ChakriDay, 2020, d(2020, 4, 6), d(2020, 4, 6)},
+		{ChakriDay, 2021, d(2021, 4, 6), d(2021, 4, 6)},
+		{ChakriDay, 2022, d(2022, 4, 6), d(2022, 4, 6)},
+		{ChakriDay, 2023, d(2023, 4, 6), d(2023, 4, 6)},
+		{ElderlyDay, 2017, d(2017, 4, 13), d(2017, 4, 13)},
+		{ElderlyDay, 2018, d(2018, 4, 13), d(2018, 4, 13)},
+		{ElderlyDay, 2019, d(2019, 4, 13), d(2019, 4, 15)},
+		{ElderlyDay, 2020, d(2020, 4, 13), d(2020, 4, 13)},
+		{ElderlyDay, 2021, d(2021, 4, 13), d(2021, 4, 13)},
+		{ElderlyDay, 2022, d(2022, 4, 13), d(2022, 4, 13)},
+		{ElderlyDay, 2023, d(2023, 4, 13), d(2023, 4, 13)},
+		{FamilyDay, 2017, d(2017, 4, 14), d(2017, 4, 14)},
+		{FamilyDay, 2018, d(2018, 4, 14), d(2018, 4, 16)},
+		{FamilyDay, 2019, d(2019, 4, 14), d(2019, 4, 16)},
+		{FamilyDay, 2020, d(2020, 4, 14), d(2020, 4, 14)},
+		{FamilyDay, 2021, d(2021, 4, 14), d(2021, 4, 14)},
+		{FamilyDay, 2022, d(2022, 4, 14), d(2022, 4, 14)},
+		{FamilyDay, 2023, d(2023, 4, 14), d(2023, 4, 14)},
+		{ThaiNewYear, 2017, d(2017, 4, 15), d(2017, 4, 17)},
+		{ThaiNewYear, 2018, d(2018, 4, 15), d(2018, 4, 17)},
+		{ThaiNewYear, 2019, d(2019, 4, 15), d(2019, 4, 15)},
+		{ThaiNewYear, 2020, d(2020, 4, 15), d(2020, 4, 15)},
+		{ThaiNewYear, 2021, d(2021, 4, 15), d(2021, 4, 15)},
+		{ThaiNewYear, 2022, d(2022, 4, 15), d(2022, 4, 15)},
+		{ThaiNewYear, 2023, d(2023, 4, 15), d(2023, 4, 17)},
+		{LaborDay, 2017, d(2017, 5, 1), d(2017, 5, 1)},
+		{LaborDay, 2018, d(2018, 5, 1), d(2018, 5, 1)},
+		{LaborDay, 2019, d(2019, 5, 1), d(2019, 5, 1)},
+		{LaborDay, 2020, d(2020, 5, 1), d(2020, 5, 1)},
+		{LaborDay, 2021, d(2021, 5, 1), d(2021, 5, 3)},
+		{LaborDay, 2022, d(2022, 5, 1), d(2022, 5, 2)},
+		{LaborDay, 2023, d(2023, 5, 1), d(2023, 5, 1)},
+		{CoronationDay, 2019, d(2019, 5, 4), d(2019, 5, 6)},
+		{CoronationDay, 2020, d(2020, 5, 4), d(2020, 5, 4)},
+		{CoronationDay, 2021, d(2021, 5, 4), d(2021, 5, 4)},
+		{CoronationDay, 2022, d(2022, 5, 4), d(2022, 5, 4)},
+		{CoronationDay, 2023, d(2023, 5, 4), d(2023, 5, 4)},
+		{QueensBirthday, 2019, d(2019, 6, 3), d(2019, 6, 3)},
+		{QueensBirthday, 2020, d(2020, 6, 3), d(2020, 6, 3)},
+		{QueensBirthday, 2021, d(2021, 6, 3), d(2021, 6, 3)},
+		{QueensBirthday, 2022, d(2022, 6, 3), d(2022, 6, 3)},
+		{QueensBirthday, 2023, d(2023, 6, 3), d(2023, 6, 5)},
+		{KingsBirthday, 2017, d(2017, 7, 28), d(2017, 7, 28)},
+		{KingsBirthday, 2018, d(2018, 7, 28), d(2018, 7, 30)},
+		{KingsBirthday, 2019, d(2019, 7, 28), d(2019, 7, 29)},
+		{KingsBirthday, 2020, d(2020, 7, 28), d(2020, 7, 28)},
+		{KingsBirthday, 2021, d(2021, 7, 28), d(2021, 7, 28)},
+		{KingsBirthday, 2022, d(2022, 7, 28), d(2022, 7, 28)},
+		{KingsBirthday, 2023, d(2023, 7, 28), d(2023, 7, 28)},
+		{MothersDay, 2017, d(2017, 8, 12), d(2017, 8, 14)},
+		{MothersDay, 2018, d(2018, 8, 12), d(2018, 8, 13)},
+		{MothersDay, 2019, d(2019, 8, 12), d(2019, 8, 12)},
+		{MothersDay, 2020, d(2020, 8, 12), d(2020, 8, 12)},
+		{MothersDay, 2021, d(2021, 8, 12), d(2021, 8, 12)},
+		{MothersDay, 2022, d(2022, 8, 12), d(2022, 8, 12)},
+		{MothersDay, 2023, d(2023, 8, 12), d(2023, 8, 14)},
+		{KingBhumibolDay, 2017, d(2017, 10, 13), d(2017, 10, 13)},
+		{KingBhumibolDay, 2018, d(2018, 10, 13), d(2018, 10, 15)},
+		{KingBhumibolDay, 2019, d(2019, 10, 13), d(2019, 10, 14)},
+		{KingBhumibolDay, 2020, d(2020, 10, 13), d(2020, 10, 13)},
+		{KingBhumibolDay, 2021, d(2021, 10, 13), d(2021, 10, 13)},
+		{KingBhumibolDay, 2022, d(2022, 10, 13), d(2022, 10, 13)},
+		{KingBhumibolDay, 2023, d(2023, 10, 13), d(2023, 10, 13)},
+		{KingChulalongkornDay, 2017, d(2017, 10, 23), d(2017, 10, 23)},
+		{KingChulalongkornDay, 2018, d(2018, 10, 23), d(2018, 10, 23)},
+		{KingChulalongkornDay, 2019, d(2019, 10, 23), d(2019, 10, 23)},
+		{KingChulalongkornDay, 2020, d(2020, 10, 23), d(2020, 10, 23)},
+		{KingChulalongkornDay, 2021, d(2021, 10, 23), d(2021, 10, 25)},
+		{KingChulalongkornDay, 2022, d(2022, 10, 23), d(2022, 10, 24)},
+		{KingChulalongkornDay, 2023, d(2023, 10, 23), d(2023, 10, 23)},
+		{FathersDay, 2017, d(2017, 12, 5), d(2017, 12, 5)},
+		{FathersDay, 2018, d(2018, 12, 5), d(2018, 12, 5)},
+		{FathersDay, 2019, d(2019, 12, 5), d(2019, 12, 5)},
+		{FathersDay, 2020, d(2020, 12, 5), d(2020, 12, 7)},
+		{FathersDay, 2021, d(2021, 12, 5), d(2021, 12, 6)},
+		{FathersDay, 2022, d(2022, 12, 5), d(2022, 12, 5)},
+		{FathersDay, 2023, d(2023, 12, 5), d(2023, 12, 5)},
+		{ConstitutionDay, 2017, d(2017, 12, 10), d(2017, 12, 11)},
+		{ConstitutionDay, 2018, d(2018, 12, 10), d(2018, 12, 10)},
+		{ConstitutionDay, 2019, d(2019, 12, 10), d(2019, 12, 10)},
+		{ConstitutionDay, 2020, d(2020, 12, 10), d(2020, 12, 10)},
+		{ConstitutionDay, 2021, d(2021, 12, 10), d(2021, 12, 10)},
+		{ConstitutionDay, 2022, d(2022, 12, 10), d(2022, 12, 12)},
+		{ConstitutionDay, 2023, d(2023, 12, 10), d(2023, 12, 11)},
+		{NewYearEve, 2017, d(2017, 12, 31), d(2017, 12, 31)},
+		{NewYearEve, 2018, d(2018, 12, 31), d(2018, 12, 31)},
+		{NewYearEve, 2019, d(2019, 12, 31), d(2019, 12, 31)},
+		{NewYearEve, 2020, d(2020, 12, 31), d(2020, 12, 31)},
+		{NewYearEve, 2021, d(2021, 12, 31), d(2021, 12, 31)},
+		{NewYearEve, 2022, d(2022, 12, 31), d(2022, 12, 31)},
+		{NewYearEve, 2023, d(2023, 12, 31), d(2023, 12, 31)},
+	}
+
+	for _, test := range tests {
+		gotAct, gotObs := test.h.Calc(test.y)
+		if !gotAct.Equal(test.wantAct) {
+			t.Errorf("%s %d: got actual: %s, want: %s", test.h.Name, test.y, gotAct.String(), test.wantAct.String())
+		}
+		if !gotObs.Equal(test.wantObs) {
+			t.Errorf("%s %d: got observed: %s, want: %s", test.h.Name, test.y, gotObs.String(), test.wantObs.String())
+		}
+	}
+
+}