chore: rebuild slowdown code

component/slowdown/slowdown.go

@@ -0,0 +1,49 @@
+package slowdown
+
+import (
+	"context"
+	"sync/atomic"
+	"time"
+)
+
+type SlowDown struct {
+	errTimes atomic.Int64
+	backoff  Backoff
+}
+
+func (s *SlowDown) Wait(ctx context.Context) (err error) {
+	select {
+	case <-time.After(s.backoff.Duration()):
+	case <-ctx.Done():
+		err = ctx.Err()
+	}
+	return
+}
+
+func New() *SlowDown {
+	return &SlowDown{
+		backoff: Backoff{
+			Min:    10 * time.Millisecond,
+			Max:    1 * time.Second,
+			Factor: 2,
+			Jitter: true,
+		},
+	}
+}
+
+func Do[T any](s *SlowDown, ctx context.Context, fn func() (T, error)) (t T, err error) {
+	if s.errTimes.Load() > 10 {
+		err = s.Wait(ctx)
+		if err != nil {
+			return
+		}
+	}
+	t, err = fn()
+	if err != nil {
+		s.errTimes.Add(1)
+		return
+	}
+	s.errTimes.Store(0)
+	s.backoff.Reset()
+	return
+}