use boxlayout from lazycore

vendor/github.com/samber/lo/retry.go

@@ -1,6 +1,68 @@
 package lo
 
-// Attempt invokes a function N times until it returns valid output. Returning either the caught error or nil. When first argument is less than `1`, the function runs until a sucessfull response is returned.
+import (
+	"sync"
+	"time"
+)
+
+type debounce struct {
+	after     time.Duration
+	mu        *sync.Mutex
+	timer     *time.Timer
+	done      bool
+	callbacks []func()
+}
+
+func (d *debounce) reset() *debounce {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+
+	if d.done {
+		return d
+	}
+
+	if d.timer != nil {
+		d.timer.Stop()
+	}
+
+	d.timer = time.AfterFunc(d.after, func() {
+		for _, f := range d.callbacks {
+			f()
+		}
+	})
+	return d
+}
+
+func (d *debounce) cancel() {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+
+	if d.timer != nil {
+		d.timer.Stop()
+		d.timer = nil
+	}
+
+	d.done = true
+}
+
+// NewDebounce creates a debounced instance that delays invoking functions given until after wait milliseconds have elapsed.
+// Play: https://go.dev/play/p/mz32VMK2nqe
+func NewDebounce(duration time.Duration, f ...func()) (func(), func()) {
+	d := &debounce{
+		after:     duration,
+		mu:        new(sync.Mutex),
+		timer:     nil,
+		done:      false,
+		callbacks: f,
+	}
+
+	return func() {
+		d.reset()
+	}, d.cancel
+}
+
+// Attempt invokes a function N times until it returns valid output. Returning either the caught error or nil. When first argument is less than `1`, the function runs until a successful response is returned.
+// Play: https://go.dev/play/p/3ggJZ2ZKcMj
 func Attempt(maxIteration int, f func(int) error) (int, error) {
 	var err error
 
@@ -15,5 +77,28 @@ func Attempt(maxIteration int, f func(int) error) (int, error) {
 	return maxIteration, err
 }
 
+// AttemptWithDelay invokes a function N times until it returns valid output,
+// with a pause between each call. Returning either the caught error or nil.
+// When first argument is less than `1`, the function runs until a successful
+// response is returned.
+// Play: https://go.dev/play/p/tVs6CygC7m1
+func AttemptWithDelay(maxIteration int, delay time.Duration, f func(int, time.Duration) error) (int, time.Duration, error) {
+	var err error
+
+	start := time.Now()
+
+	for i := 0; maxIteration <= 0 || i < maxIteration; i++ {
+		err = f(i, time.Since(start))
+		if err == nil {
+			return i + 1, time.Since(start), nil
+		}
+
+		if maxIteration <= 0 || i+1 < maxIteration {
+			time.Sleep(delay)
+		}
+	}
+
+	return maxIteration, time.Since(start), err
+}
+
 // throttle ?
-// debounce ?