Have duration.ParseDurationSecond handle json.Number

helper/duration/duration.go

@@ -1,6 +1,7 @@
 package duration
 
 import (
+	"encoding/json"
 	"errors"
 	"strconv"
 	"strings"
@@ -9,6 +10,10 @@ import (
 
 func ParseDurationSecond(in interface{}) (time.Duration, error) {
 	var dur time.Duration
+	jsonIn, ok := in.(json.Number)
+	if ok {
+		in = jsonIn.String()
+	}
 	switch in.(type) {
 	case string:
 		inp := in.(string)

helper/duration/duration_test.go

@@ -1,6 +1,7 @@
 package duration
 
 import (
+	"encoding/json"
 	"testing"
 	"time"
 )
@@ -20,4 +21,11 @@ func Test_ParseDurationSecond(t *testing.T) {
 	if outp != time.Duration(9876)*time.Second {
 		t.Fatal("not equivalent")
 	}
+	outp, err = ParseDurationSecond(json.Number("4352"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if outp != time.Duration(4352)*time.Second {
+		t.Fatal("not equivalent")
+	}
 }