chore: reorganize go code

internal/sshutil/framebatcher.go

@@ -0,0 +1,61 @@
+package sshutil
+
+import (
+	"io"
+	"sync"
+	"time"
+
+	"github.com/tale/headplane/agent/internal/util"
+)
+
+type FrameBatcher struct {
+	mu       sync.Mutex
+	buffer   []byte
+	writer   io.Writer
+	timer    *time.Timer
+	interval time.Duration
+	done     chan struct{}
+}
+
+func NewFrameBatcher(writer io.Writer, interval time.Duration) *FrameBatcher {
+	return &FrameBatcher{
+		writer:   writer,
+		interval: interval,
+		done:     make(chan struct{}),
+	}
+}
+
+func (b *FrameBatcher) QueueMsg(msg []byte) {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+
+	b.buffer = append(b.buffer, msg...)
+	if b.timer != nil {
+		b.timer.Stop()
+	}
+
+	b.timer = time.AfterFunc(b.interval, b.flush)
+}
+
+func (b *FrameBatcher) flush() {
+	log := util.GetLogger()
+
+	b.mu.Lock()
+	defer b.mu.Unlock()
+
+	if len(b.buffer) == 0 {
+		return
+	}
+
+	_, err := b.writer.Write(b.buffer)
+	if err != nil {
+		log.Error("Failed to write batched message: %v", err)
+	}
+
+	b.buffer = nil
+}
+
+func (b *FrameBatcher) Close() {
+	close(b.done)
+	b.flush()
+}