add json marshaling to datetime

pkg/insider/time.go

@@ -6,11 +6,22 @@ import (
 
 type DateTime time.Time
 
-
 func (f DateTime) MarshalCSV() ([]byte, error) {
 	return []byte(f.GetTime().Format(time.RFC3339)), nil
 }
 
+func (f *DateTime) MarshalJSON() ([]byte, error) {
+	return f.GetTime().MarshalJSON()
+}
+
+func (f *DateTime) UnmarshalJSON(data []byte) error {
+	str := string(data)
+	println(str)
+	t, err := time.Parse(`"2006-01-02T15:04:05.999999999Z07:00"`, string(data))
+	*f = DateTime(t)
+	return err
+}
+
 func (f *DateTime) UnmarshalCSV(data []byte) error {
 	// 31/03/2022 00:00:00
 	stoTz, err := time.LoadLocation("Europe/Stockholm")
@@ -27,4 +38,4 @@ func (f *DateTime) UnmarshalCSV(data []byte) error {
 
 func (f DateTime) GetTime() time.Time {
 	return time.Time(f)
-}
+}

pkg/insider/time_test.go

@@ -0,0 +1,27 @@
+package insider
+
+import (
+	"encoding/json"
+	"github.com/stretchr/testify/assert"
+	"testing"
+	"time"
+)
+
+func TestDatetime_MarshalJSON(t *testing.T) {
+	type test struct {
+		Date DateTime `json:"date"`
+	}
+	ti := DateTime(time.Date(2020, 1, 1, 1, 1, 1, 0, time.UTC))
+	s := test{
+		Date: ti,
+	}
+	marshal, err := json.Marshal(&s)
+	assert.Nil(t, err)
+	assert.Equal(t, "{\"date\":\"2020-01-01T01:01:01Z\"}", string(marshal))
+
+	s = test{}
+
+	err = json.Unmarshal(marshal, &s)
+	assert.Nil(t, err)
+	assert.Equal(t, ti, s.Date)
+}