Added LTR Eviction

2 files changed, 90 insertions, 0 deletions

diff --git a/internal/pausedtimer/timer.go b/internal/pausedtimer/timer.go
new file mode 100644
index 0000000..691c257
--- /dev/null
+++ b/internal/pausedtimer/timer.go
@@ -0,0 +1,54 @@
+package pausedtimer
+
+import (
+	"math"
+	"time"
+)
+
+// PauseTimer is a struct that wraps a time.Ticker and provides additional functionality
+// to pause and resume the ticker.
+// If the duration is 0, the timer is created in a stopped state.
+type PauseTimer struct {
+	*time.Ticker
+	duration time.Duration
+}
+
+// New creates a new pauseTimer with the specified duration.
+func New(d time.Duration) *PauseTimer {
+	ret := &PauseTimer{duration: d}
+	if d != 0 {
+		ret.Ticker = time.NewTicker(d)
+	} else {
+		ret.Ticker = time.NewTicker(math.MaxInt64)
+		ret.Reset(0)
+	}
+	return ret
+}
+
+// NewStopped creates a new pauseTimer with the specified duration and stops it immediately.
+func NewStopped(d time.Duration) *PauseTimer {
+	ret := New(d)
+	ret.Stop()
+	return ret
+}
+
+// Reset sets the timer to the specified duration and starts it.
+// If the duration is 0, the timer is stopped.
+func (t *PauseTimer) Reset(d time.Duration) {
+	t.duration = d
+	if t.duration == 0 {
+		t.Stop()
+	} else {
+		t.Ticker.Reset(d)
+	}
+}
+
+// Resume resumes the timer with its last set duration.
+func (t *PauseTimer) Resume() {
+	t.Reset(t.GetDuration())
+}
+
+// GetDuration returns the current duration of the timer.
+func (t *PauseTimer) GetDuration() time.Duration {
+	return t.duration
+}
diff --git a/internal/pausedtimer/timer_test.go b/internal/pausedtimer/timer_test.go
new file mode 100644
index 0000000..6e15001
--- /dev/null
+++ b/internal/pausedtimer/timer_test.go
@@ -0,0 +1,36 @@
+package pausedtimer
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNew(t *testing.T) {
+	d := 1 * time.Second
+	timer := New(d)
+	assert.Equal(t, d, timer.duration)
+	assert.NotNil(t, timer.Ticker)
+}
+
+func TestPauseTimerReset(t *testing.T) {
+	d := 1 * time.Second
+	timer := New(d)
+	newD := 2 * time.Second
+	timer.Reset(newD)
+	assert.Equal(t, newD, timer.duration)
+}
+
+func TestPauseTimerResume(t *testing.T) {
+	d := 1 * time.Second
+	timer := NewStopped(d)
+	timer.Resume()
+	assert.Equal(t, d, timer.duration)
+}
+
+func TestPauseTimerGetDuration(t *testing.T) {
+	d := 1 * time.Second
+	timer := New(d)
+	assert.Equal(t, d, timer.GetDuration())
+}