refactoring

upnp/statevariable/utils_string.go

@@ -0,0 +1,37 @@
+package stateVariables
+
+import (
+	"fmt"
+)
+
+// toString converts v to string if possible.
+func toString(v interface{}) (string, error) {
+	switch val := v.(type) {
+	case string:
+		return val, nil
+
+	case []byte:
+		return string(val), nil
+
+	case fmt.Stringer:
+		return val.String(), nil
+
+	case int, int8, int16, int32, int64:
+		return fmt.Sprintf("%d", val), nil
+
+	case uint, uint8, uint16, uint32, uint64:
+		return fmt.Sprintf("%d", val), nil
+
+	case float32, float64:
+		return fmt.Sprintf("%v", val), nil
+
+	case bool:
+		if val {
+			return "true", nil
+		}
+		return "false", nil
+
+	default:
+		return "", fmt.Errorf("cannot convert type %T to string", v)
+	}
+}