[Task] Show active call participants in the people list #7199 (#7300)

features/roomdetails/impl/src/main/kotlin/io/element/android/features/roomdetails/impl/members/RoomMemberListPresenter.kt

@@ -37,6 +37,7 @@ import io.element.android.libraries.matrix.api.room.roomMembers
 import io.element.android.libraries.matrix.api.room.toMatrixUser
 import io.element.android.libraries.matrix.ui.room.PowerLevelRoomMemberComparator
 import io.element.android.libraries.matrix.ui.room.roomMemberIdentityStateChange
+import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.ImmutableMap
 import kotlinx.collections.immutable.persistentMapOf
 import kotlinx.collections.immutable.toImmutableList
@@ -58,6 +59,7 @@ class RoomMemberListPresenter(
     override fun present(): RoomMemberListState {
         val searchQuery = rememberTextFieldState()
         val membersState by room.membersStateFlow.collectAsState()
+        val roomInfo by room.roomInfoFlow.collectAsState()
         val canInvite by room.permissionsAsState(false) { perms -> perms.canOwnUserInvite() }
         val roomModerationState = roomMembersModerationPresenter.present()
 
@@ -72,13 +74,18 @@ class RoomMemberListPresenter(
         var selectedSection by remember { mutableStateOf(SelectedSection.MEMBERS) }
         var roomMembers: AsyncData<RoomMembers> by remember { mutableStateOf(AsyncData.Loading()) }
         var filteredRoomMembers: AsyncData<RoomMembers> by remember { mutableStateOf(AsyncData.Loading()) }
+        val activeCallParticipants = roomInfo.activeRoomCallParticipants
+
+        val comparator = remember(activeCallParticipants) {
+            roomMemberListComparator(activeCallParticipants)
+        }
 
         // Update the room members when the screen is loaded
         LaunchedEffect(Unit) {
             room.updateMembers()
         }
 
-        LaunchedEffect(membersState, roomMemberIdentityStates) {
+        LaunchedEffect(membersState, roomMemberIdentityStates, activeCallParticipants) {
             if (membersState is RoomMembersState.Unknown) {
                 return@LaunchedEffect
             }
@@ -90,23 +97,23 @@ class RoomMemberListPresenter(
             }
             withContext(coroutineDispatchers.io) {
                 val members = membersState.roomMembers().orEmpty().groupBy { it.membership }
-                val info = room.info()
-                if (members.getOrDefault(RoomMembershipState.JOIN, emptyList()).size < info.joinedMembersCount / 2) {
+                if (members.getOrDefault(RoomMembershipState.JOIN, emptyList()).size < roomInfo.joinedMembersCount / 2) {
                     // Don't display initial room member list if we have less than half of the joined members:
-                    // This result will come from the timeline loading membership events and it'll be wrong.
+                    // This result will come from the timeline loading membership events, and it'll be wrong.
                     return@withContext
                 }
                 val result = RoomMembers(
                     invited = members.getOrDefault(RoomMembershipState.INVITE, emptyList())
-                        .map { it.withIdentityState(roomMemberIdentityStates) }
+                        .map { it.withIdentityState(roomMemberIdentityStates, activeCallParticipants) }
                         .toImmutableList(),
                     joined = members.getOrDefault(RoomMembershipState.JOIN, emptyList())
-                        .sortedWith(powerLevelRoomMemberComparator)
-                        .map { it.withIdentityState(roomMemberIdentityStates) }
+                        .sortedWith(comparator)
+                        // .sortedWith(powerLevelRoomMemberComparator)
+                        .map { it.withIdentityState(roomMemberIdentityStates, activeCallParticipants) }
                         .toImmutableList(),
                     banned = members.getOrDefault(RoomMembershipState.BAN, emptyList())
                         .sortedBy { it.userId.value }
-                        .map { it.withIdentityState(roomMemberIdentityStates) }
+                        .map { it.withIdentityState(roomMemberIdentityStates, activeCallParticipants) }
                         .toImmutableList(),
                 )
                 roomMembers = if (membersState is RoomMembersState.Pending) {
@@ -150,12 +157,29 @@ class RoomMemberListPresenter(
         return state
     }
 
-    private suspend fun RoomMember.withIdentityState(identityStates: ImmutableMap<UserId, IdentityState>): RoomMemberWithIdentityState {
+    private suspend fun RoomMember.withIdentityState(
+        identityStates: ImmutableMap<UserId, IdentityState>,
+        activeCallParticipants: ImmutableList<UserId>
+    ): RoomMemberWithIdentityState {
         return if (room.info().isEncrypted != true) {
-            RoomMemberWithIdentityState(this, null)
+            RoomMemberWithIdentityState(this, null, userId in activeCallParticipants)
         } else {
             val identityState = identityStates[userId] ?: encryptionService.getUserIdentity(userId, fallbackToServer = false).getOrNull()
-            RoomMemberWithIdentityState(this, identityState)
+            RoomMemberWithIdentityState(this, identityState, userId in activeCallParticipants)
         }
     }
+
+    private fun roomMemberListComparator(
+        activeCallParticipants: List<UserId>,
+    ): Comparator<RoomMember> =
+        Comparator { a, b ->
+            val aInCall = a.userId in activeCallParticipants
+            val bInCall = b.userId in activeCallParticipants
+
+            when {
+                aInCall && !bInCall -> -1
+                !aInCall && bInCall -> 1
+                else -> powerLevelRoomMemberComparator.compare(a, b)
+            }
+        }
 }

features/roomdetails/impl/src/main/kotlin/io/element/android/features/roomdetails/impl/members/RoomMemberListState.kt

@@ -66,4 +66,5 @@ data class RoomMembers(
 data class RoomMemberWithIdentityState(
     val roomMember: RoomMember,
     val identityState: IdentityState?,
+    val isInCall: Boolean
 )

features/roomdetails/impl/src/main/kotlin/io/element/android/features/roomdetails/impl/members/RoomMemberListStateProvider.kt

@@ -78,7 +78,7 @@ private fun aLoadedRoomMembers() = AsyncData.Success(
         joined = persistentListOf(
             anAlice().withIdentity(identityState = IdentityState.Verified),
             aBob().withIdentity(identityState = IdentityState.PinViolation),
-            aCarol().withIdentity(),
+            aCarol().withIdentity(isInCall = true),
             aDavid().withIdentity(),
             anEve().withIdentity(identityState = IdentityState.VerificationViolation)
         ),
@@ -174,4 +174,8 @@ fun aBannedSusie(): RoomMember = aRoomMember(UserId("@susie:server.org"), USER_N
 
 fun aBannedMallory(): RoomMember = aRoomMember(UserId("@mallory:server.org"), USER_NAME_MALLORY, membership = RoomMembershipState.BAN)
 
-private fun RoomMember.withIdentity(identityState: IdentityState? = null) = RoomMemberWithIdentityState(this, identityState)
+private fun RoomMember.withIdentity(identityState: IdentityState? = null, isInCall: Boolean = false) = RoomMemberWithIdentityState(
+    this,
+    identityState,
+    isInCall
+)

features/roomdetails/impl/src/main/kotlin/io/element/android/features/roomdetails/impl/members/RoomMemberListView.kt

@@ -338,6 +338,15 @@ private fun RoomMemberListItem(
                         color = ElementTheme.colors.textSecondary,
                     )
                 }
+
+                if (roomMemberWithIdentity.isInCall) {
+                    Icon(
+                        modifier = Modifier.size(20.dp),
+                        imageVector = CompoundIcons.VideoCallSolid(),
+                        contentDescription = stringResource(CommonStrings.action_video_call),
+                        tint = ElementTheme.colors.iconSuccessPrimary
+                    )
+                }
             }
         }
     )

features/roomdetails/impl/src/test/kotlin/io/element/android/features/roomdetails/impl/members/RoomMemberListPresenterTest.kt

@@ -191,6 +191,38 @@ class RoomMemberListPresenterTest {
             awaitItem().eventSink(RoomMemberListEvent.RoomMemberSelected(anInvitedVictor()))
         }
     }
+
+    @Test
+    fun `call participants are shown first in joined members`() = runTest {
+        val room = createFakeJoinedRoom().apply {
+            givenRoomInfo(
+                aRoomInfo(
+                    joinedMembersCount = 5,
+                    activeRoomCallParticipants = listOf(
+                        aCarol().userId
+                    ),
+                )
+            )
+            givenRoomMembersState(RoomMembersState.Ready(aRoomMemberList()))
+        }
+
+        val presenter = createPresenter(joinedRoom = room)
+
+        presenter.test {
+            skipItems(1)
+
+            val loadedState = awaitItem()
+            val joined = loadedState.filteredRoomMembers.dataOrNull()!!.joined
+
+            assertThat(joined.first().roomMember.userId)
+                .isEqualTo(aCarol().userId)
+
+            assertThat(joined.first().isInCall).isTrue()
+
+            assertThat(joined.count { it.isInCall }).isEqualTo(1)
+            assertThat(joined.drop(1).all { !it.isInCall }).isTrue()
+        }
+    }
 }
 
 private fun createFakeJoinedRoom(