add compare function to timedversion (#1422)

* add compare function to timedversion

* cleanup

pkg/utils/timed_version.go

@@ -56,6 +56,12 @@ func NewTimedVersionFromProto(ptv *livekit.TimedVersion) *TimedVersion {
 	}
 }
 
+func NewTimedVersionFromTime(t time.Time) *TimedVersion {
+	return &TimedVersion{
+		ts: t.UnixMicro(),
+	}
+}
+
 func (t *TimedVersion) Update(other *TimedVersion) {
 	t.lock.Lock()
 	if other.After(t) {
@@ -76,6 +82,25 @@ func (t *TimedVersion) After(other *TimedVersion) bool {
 	return t.ts > other.ts
 }
 
+func (t *TimedVersion) Compare(other *TimedVersion) int {
+	t.lock.RLock()
+	defer t.lock.RUnlock()
+
+	if t.ts == other.ts {
+		if t.ticks == other.ticks {
+			return 0
+		}
+		if t.ticks > other.ticks {
+			return 1
+		}
+		return -1
+	}
+	if t.ts > other.ts {
+		return 1
+	}
+	return -1
+}
+
 func (t *TimedVersion) ToProto() *livekit.TimedVersion {
 	t.lock.RLock()
 	defer t.lock.RUnlock()

pkg/utils/timed_version_test.go

@@ -36,4 +36,8 @@ func TestTimedVersion(t *testing.T) {
 	assert.True(t, tv2.After(tv1))
 	// tv3 and tv2 are equivalent after update
 	assert.False(t, tv3.After(tv2))
+
+	assert.Equal(t, 0, tv1.Compare(tv1))
+	assert.Equal(t, -1, tv1.Compare(tv2))
+	assert.Equal(t, 1, tv2.Compare(tv1))
 }