add issue tasks.

graph/scalars/duration.go

@@ -0,0 +1,30 @@
+package scalars
+
+import (
+	"fmt"
+	"github.com/99designs/gqlgen/graphql"
+	"io"
+	"strconv"
+	"time"
+)
+
+func MarshalDuration(d time.Duration) graphql.Marshaler {
+	return graphql.WriterFunc(func(w io.Writer) {
+		_, _ = w.Write([]byte(strconv.Itoa(int(d.Milliseconds()))))
+	})
+}
+
+func UnmarshalDuration(v interface{}) (time.Duration, error) {
+	switch v := v.(type) {
+	case string:
+		return time.ParseDuration(v)
+	case int:
+		return time.Millisecond * time.Duration(v), nil
+	case int64:
+		return time.Millisecond * time.Duration(v), nil
+	case float64:
+		return time.Millisecond * time.Duration(v), nil
+	default:
+		return 0, fmt.Errorf("%T is not a bool", v)
+	}
+}