Do not compute live broadcast on last message if the feature is disabled in the lab

vector/src/main/java/im/vector/app/features/home/room/list/usecase/GetLatestPreviewableEventUseCase.kt

@@ -17,6 +17,7 @@
 package im.vector.app.features.home.room.list.usecase
 
 import im.vector.app.core.di.ActiveSessionHolder
+import im.vector.app.features.settings.VectorPreferences
 import im.vector.app.features.voicebroadcast.isLive
 import im.vector.app.features.voicebroadcast.isVoiceBroadcast
 import im.vector.app.features.voicebroadcast.model.asVoiceBroadcastEvent
@@ -35,14 +36,21 @@ import javax.inject.Inject
 class GetLatestPreviewableEventUseCase @Inject constructor(
         private val sessionHolder: ActiveSessionHolder,
         private val getRoomLiveVoiceBroadcastsUseCase: GetRoomLiveVoiceBroadcastsUseCase,
+        private val vectorPreferences: VectorPreferences,
 ) {
 
     fun execute(roomId: String): TimelineEvent? {
         val room = sessionHolder.getSafeActiveSession()?.getRoom(roomId) ?: return null
         val roomSummary = room.roomSummary() ?: return null
-        return getCallEvent(roomSummary)
+        // FIXME Observing live broadcasts results in many db requests,
+        //  to prevent performances issues, we only enable this mechanism if the voice broadcast flag is enabled
+        return if (vectorPreferences.isVoiceBroadcastEnabled()) {
+            getCallEvent(roomSummary)
                     ?: getLiveVoiceBroadcastEvent(room)
                     ?: getDefaultLatestEvent(room, roomSummary)
+        } else {
+            roomSummary.latestPreviewableEvent
+        }
     }
 
     private fun getCallEvent(roomSummary: RoomSummary): TimelineEvent? {

vector/src/test/java/im/vector/app/features/home/room/list/usecase/GetLatestPreviewableEventUseCaseTest.kt

@@ -23,6 +23,7 @@ import im.vector.app.features.voicebroadcast.model.asVoiceBroadcastEvent
 import im.vector.app.features.voicebroadcast.usecase.GetRoomLiveVoiceBroadcastsUseCase
 import im.vector.app.test.fakes.FakeActiveSessionHolder
 import im.vector.app.test.fakes.FakeRoom
+import im.vector.app.test.fakes.FakeVectorPreferences
 import io.mockk.every
 import io.mockk.mockk
 import org.amshove.kluent.shouldBe
@@ -46,10 +47,12 @@ internal class GetLatestPreviewableEventUseCaseTest {
     private val fakeSessionHolder = FakeActiveSessionHolder()
     private val fakeRoomSummary = mockk<RoomSummary>()
     private val fakeGetRoomLiveVoiceBroadcastsUseCase = mockk<GetRoomLiveVoiceBroadcastsUseCase>()
+    private val fakeVectorPreferences = FakeVectorPreferences()
 
     private val getLatestPreviewableEventUseCase = GetLatestPreviewableEventUseCase(
             fakeSessionHolder.instance,
             fakeGetRoomLiveVoiceBroadcastsUseCase,
+            fakeVectorPreferences.instance,
     )
 
     @Before
@@ -62,6 +65,7 @@ internal class GetLatestPreviewableEventUseCaseTest {
                 every { eventId } returns firstArg()
             }
         }
+        fakeVectorPreferences.givenIsVoiceBroadcastEnabled(true)
     }
 
     @Test

vector/src/test/java/im/vector/app/test/fakes/FakeVectorPreferences.kt

@@ -85,4 +85,8 @@ class FakeVectorPreferences {
     fun verifySetIpAddressVisibilityInDeviceManagerScreens(isVisible: Boolean) {
         verify { instance.setIpAddressVisibilityInDeviceManagerScreens(isVisible) }
     }
+
+    fun givenIsVoiceBroadcastEnabled(isEnabled: Boolean) {
+        every { instance.isVoiceBroadcastEnabled() } returns isEnabled
+    }
 }