Add lastSpokeAt and joinedAt fields to Participant (#226)

@@ -14,6 +14,7 @@ import io.livekit.android.util.flowDelegate
 import kotlinx.coroutines.*
 import kotlinx.coroutines.flow.*
 import livekit.LivekitModels
+import java.util.Date
 import javax.inject.Named
 
 open class Participant(
@@ -69,6 +70,9 @@ open class Participant(
             listener?.onSpeakingChanged(this)
             internalListener?.onSpeakingChanged(this)
             eventBus.postEvent(ParticipantEvent.SpeakingChanged(this, newValue), scope)
+            if (newValue) {
+                lastSpokeAt = Date().time
+            }
         }
     }
         internal set
@@ -124,6 +128,20 @@ open class Participant(
         internal set
 
     /**
+     * Timestamp when participant joined room, in milliseconds
+     */
+    val joinedAt
+        get() = participantInfo?.joinedAt?.times(1000)
+
+    /**
+     * Timestamp when the participant last started speaking, in milliseconds
+     */
+    @FlowObservable
+    @get:FlowObservable
+    var lastSpokeAt by flowDelegate<Long?>(null)
+        internal set
+
+    /**
      * Listener for when participant properties change
      */
     @Deprecated("Use events instead")

@@ -9,10 +9,14 @@ import kotlinx.coroutines.test.runTest
 import livekit.LivekitModels
 import org.junit.Assert
 import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertNull
 import org.junit.Assert.assertTrue
 import org.junit.Before
 import org.junit.Rule
 import org.junit.Test
+import java.util.Date
+import kotlin.math.abs
 
 @ExperimentalCoroutinesApi
 class ParticipantTest {
@@ -125,15 +129,27 @@ class ParticipantTest {
 
         participant.dispose()
         assertEquals("", participant.sid)
-        Assert.assertNull(participant.name)
-        Assert.assertNull(participant.identity)
-        Assert.assertNull(participant.metadata)
-        Assert.assertNull(participant.permissions)
-        Assert.assertNull(participant.participantInfo)
+        assertNull(participant.name)
+        assertNull(participant.identity)
+        assertNull(participant.metadata)
+        assertNull(participant.permissions)
+        assertNull(participant.participantInfo)
         Assert.assertFalse(participant.isSpeaking)
         assertEquals(ConnectionQuality.UNKNOWN, participant.connectionQuality)
     }
 
+    @Test
+    fun speakingUpdatesLastSpokeAt() = runTest {
+        assertNull(participant.lastSpokeAt)
+
+        participant.isSpeaking = true
+
+        val lastSpokeAt = participant.lastSpokeAt
+        val timestamp = Date().time
+        assertNotNull(lastSpokeAt)
+        assertTrue(abs(lastSpokeAt!! - timestamp) < 1000)
+    }
+
     companion object {
         val INFO = LivekitModels.ParticipantInfo.newBuilder()
             .setSid("sid")

- Subproject commit e78c5b18c0f3a18bae5d5cec44d30bb6358b9bc4
+ Subproject commit ac74d1e920384ac3972b6017d1514ca983450f0d