make tags of exported transaction data in the same order as they displayed in transaction

pkg/services/transaction_tags.go

@@ -9,6 +9,7 @@ import (
 	"github.com/mayswind/ezbookkeeping/pkg/datastore"
 	"github.com/mayswind/ezbookkeeping/pkg/errs"
 	"github.com/mayswind/ezbookkeeping/pkg/models"
+	"github.com/mayswind/ezbookkeeping/pkg/utils"
 	"github.com/mayswind/ezbookkeeping/pkg/uuid"
 )
 
@@ -440,5 +441,10 @@ func (s *TransactionTagService) GetGroupedTransactionTagIds(tagIndexes []*models
 		transactionTagIds = append(transactionTagIds, tagIndex.TagId)
 		allTransactionTagIds[tagIndex.TransactionId] = transactionTagIds
 	}
+
+	for _, tagIds := range allTransactionTagIds {
+		utils.Int64Sort(tagIds)
+	}
+
 	return allTransactionTagIds
 }

pkg/utils/slices.go

@@ -1,5 +1,7 @@
 package utils
 
+import "sort"
+
 // Int64SliceEquals returns whether specific two int64 arrays equal
 func Int64SliceEquals(s1, s2 []int64) bool {
 	if (s1 == nil) != (s2 == nil) {
@@ -58,6 +60,13 @@ func ToUniqueInt64Slice(items []int64) []int64 {
 	return uniqueItems
 }
 
+// Int64Sort sorts the specified array with int64 items
+func Int64Sort(items []int64) {
+	sort.Slice(items, func(i, j int) bool {
+		return items[i] < items[j]
+	})
+}
+
 // ToSet returns a map where the keys are the items in the specified array
 func ToSet(items []int64) map[int64]bool {
 	itemExistMap := make(map[int64]bool)

pkg/utils/slices_test.go

@@ -131,6 +131,14 @@ func TestToUniqueInt64Slice_NilOrEmpty(t *testing.T) {
 	assert.Equal(t, expectedValue, actualValue)
 }
 
+func TestInt64Sort(t *testing.T) {
+	actualValue := []int64{4, 3, 2, 1, 5}
+	expectedValue := []int64{1, 2, 3, 4, 5}
+
+	Int64Sort(actualValue)
+	assert.Equal(t, expectedValue, actualValue)
+}
+
 func TestToSet(t *testing.T) {
 	arr := []int64{0, 1, 2, 3, 2, 4, 0}
 	actualValue := ToSet(arr)