RoomList : refactor how we manage state so it's easier to reason about.

features/roomlist/impl/src/main/kotlin/io/element/android/features/roomlist/impl/RoomListPresenter.kt

@@ -19,6 +19,7 @@ package io.element.android.features.roomlist.impl
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.State
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
@@ -26,6 +27,7 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.produceState
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.rememberUpdatedState
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.runtime.snapshotFlow
@@ -52,6 +54,7 @@ import io.element.android.libraries.matrix.api.MatrixClient
 import io.element.android.libraries.matrix.api.core.RoomId
 import io.element.android.libraries.matrix.api.encryption.EncryptionService
 import io.element.android.libraries.matrix.api.encryption.RecoveryState
+import io.element.android.libraries.matrix.api.roomlist.RoomList
 import io.element.android.libraries.matrix.api.sync.SyncService
 import io.element.android.libraries.matrix.api.sync.SyncState
 import io.element.android.libraries.matrix.api.timeline.ReceiptType
@@ -60,6 +63,7 @@ import io.element.android.libraries.matrix.api.user.getCurrentUser
 import io.element.android.libraries.matrix.api.verification.SessionVerificationService
 import io.element.android.services.analytics.api.AnalyticsService
 import io.element.android.services.analyticsproviders.api.trackers.captureInteraction
+import kotlinx.collections.immutable.toPersistentList
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.collect
@@ -100,11 +104,7 @@ class RoomListPresenter @Inject constructor(
         val matrixUser: MutableState<MatrixUser?> = rememberSaveable {
             mutableStateOf(null)
         }
-        val roomList by produceState(initialValue = AsyncData.Loading()) {
-            roomListDataSource.allRooms.collect { value = AsyncData.Success(it) }
-        }
         val networkConnectionStatus by networkMonitor.connectivity.collectAsState()
-
         val filtersState = filtersPresenter.present()
         val searchState = searchPresenter.present()
 
@@ -113,28 +113,7 @@ class RoomListPresenter @Inject constructor(
             initialLoad(matrixUser)
         }
 
-        val isMigrating = migrationScreenPresenter.present().isMigrating
-
         var securityBannerDismissed by rememberSaveable { mutableStateOf(false) }
-        val canVerifySession by sessionVerificationService.canVerifySessionFlow.collectAsState(initial = false)
-        val isLastDevice by encryptionService.isLastDevice.collectAsState()
-        val recoveryState by encryptionService.recoveryStateStateFlow.collectAsState()
-        val syncState by syncService.syncState.collectAsState()
-        val securityBannerState by remember {
-            derivedStateOf {
-                when {
-                    securityBannerDismissed -> SecurityBannerState.None
-                    canVerifySession -> if (isLastDevice) {
-                        SecurityBannerState.RecoveryKeyConfirmation
-                    } else {
-                        SecurityBannerState.SessionVerification
-                    }
-                    recoveryState == RecoveryState.INCOMPLETE &&
-                        syncState == SyncState.Running -> SecurityBannerState.RecoveryKeyConfirmation
-                    else -> SecurityBannerState.None
-                }
-            }
-        }
 
         // Avatar indicator
         val showAvatarIndicator by indicatorService.showRoomListTopBarIndicator()
@@ -162,19 +141,18 @@ class RoomListPresenter @Inject constructor(
 
         val snackbarMessage by snackbarDispatcher.collectSnackbarMessageAsState()
 
+        val contentState = roomListContentState(securityBannerDismissed)
+
         return RoomListState(
             matrixUser = matrixUser.value,
             showAvatarIndicator = showAvatarIndicator,
-            roomList = roomList,
-            securityBannerState = securityBannerState,
             snackbarMessage = snackbarMessage,
             hasNetworkConnection = networkConnectionStatus == NetworkStatus.Online,
-            invitesState = inviteStateDataSource.inviteState(),
             contextMenu = contextMenu.value,
             leaveRoomState = leaveRoomState,
             filtersState = filtersState,
             searchState = searchState,
-            displayMigrationStatus = isMigrating,
+            contentState = contentState,
             eventSink = ::handleEvents,
         )
     }
@@ -183,6 +161,70 @@ class RoomListPresenter @Inject constructor(
         matrixUser.value = client.getCurrentUser()
     }
 
+    @Composable
+    private fun securityBannerState(
+        securityBannerDismissed: Boolean,
+    ): State<SecurityBannerState> {
+        val currentSecurityBannerDismissed by rememberUpdatedState(securityBannerDismissed)
+        val canVerifySession by sessionVerificationService.canVerifySessionFlow.collectAsState(initial = false)
+        val isLastDevice by encryptionService.isLastDevice.collectAsState()
+        val recoveryState by encryptionService.recoveryStateStateFlow.collectAsState()
+        val syncState by syncService.syncState.collectAsState()
+        return remember {
+            derivedStateOf {
+                when {
+                    currentSecurityBannerDismissed -> SecurityBannerState.None
+                    canVerifySession -> if (isLastDevice) {
+                        SecurityBannerState.RecoveryKeyConfirmation
+                    } else {
+                        SecurityBannerState.SessionVerification
+                    }
+                    recoveryState == RecoveryState.INCOMPLETE &&
+                        syncState == SyncState.Running -> SecurityBannerState.RecoveryKeyConfirmation
+                    else -> SecurityBannerState.None
+                }
+            }
+        }
+    }
+
+    @Composable
+    private fun roomListContentState(
+        securityBannerDismissed: Boolean,
+    ): RoomListContentState {
+        val roomSummaries by produceState(initialValue = AsyncData.Loading()) {
+            roomListDataSource.allRooms.collect { value = AsyncData.Success(it) }
+        }
+        val loadingState by roomListDataSource.loadingState.collectAsState()
+        val showMigration = migrationScreenPresenter.present().isMigrating
+        val showSkeleton by remember {
+            derivedStateOf {
+                loadingState == RoomList.LoadingState.NotLoaded || roomSummaries is AsyncData.Loading
+            }
+        }
+        val showEmpty by remember {
+            derivedStateOf {
+                (loadingState as? RoomList.LoadingState.Loaded)?.numberOfRooms == 0
+            }
+        }
+        return when {
+            showMigration -> RoomListContentState.Migration
+            showSkeleton -> RoomListContentState.Skeleton(count = 16)
+            showEmpty -> {
+                val invitesState = inviteStateDataSource.inviteState()
+                RoomListContentState.Empty(invitesState)
+            }
+            else -> {
+                val invitesState = inviteStateDataSource.inviteState()
+                val securityBannerState by securityBannerState(securityBannerDismissed)
+                RoomListContentState.Rooms(
+                    invitesState = invitesState,
+                    securityBannerState = securityBannerState,
+                    summaries = roomSummaries.dataOrNull().orEmpty().toPersistentList()
+                )
+            }
+        }
+    }
+
     @OptIn(ExperimentalCoroutinesApi::class)
     private fun CoroutineScope.showContextMenu(event: RoomListEvents.ShowContextMenu, contextMenuState: MutableState<RoomListState.ContextMenu>) = launch {
         val initialState = RoomListState.ContextMenu.Shown(

features/roomlist/impl/src/main/kotlin/io/element/android/features/roomlist/impl/RoomListState.kt

@@ -21,7 +21,6 @@ import io.element.android.features.leaveroom.api.LeaveRoomState
 import io.element.android.features.roomlist.impl.filters.RoomListFiltersState
 import io.element.android.features.roomlist.impl.model.RoomListRoomSummary
 import io.element.android.features.roomlist.impl.search.RoomListSearchState
-import io.element.android.libraries.architecture.AsyncData
 import io.element.android.libraries.designsystem.utils.snackbar.SnackbarMessage
 import io.element.android.libraries.matrix.api.core.RoomId
 import io.element.android.libraries.matrix.api.user.MatrixUser
@@ -31,20 +30,17 @@ import kotlinx.collections.immutable.ImmutableList
 data class RoomListState(
     val matrixUser: MatrixUser?,
     val showAvatarIndicator: Boolean,
-    val roomList: AsyncData<ImmutableList<RoomListRoomSummary>>,
-    val securityBannerState: SecurityBannerState,
     val hasNetworkConnection: Boolean,
     val snackbarMessage: SnackbarMessage?,
-    val invitesState: InvitesState,
     val contextMenu: ContextMenu,
     val leaveRoomState: LeaveRoomState,
     val filtersState: RoomListFiltersState,
     val searchState: RoomListSearchState,
-    val displayMigrationStatus: Boolean,
+    val contentState: RoomListContentState,
     val eventSink: (RoomListEvents) -> Unit,
 ) {
-    val displayFilters = filtersState.isFeatureEnabled && !displayMigrationStatus
+    val displayFilters = filtersState.isFeatureEnabled && contentState is RoomListContentState.Rooms
-    val displayEmptyState = roomList is AsyncData.Success && roomList.data.isEmpty()
+    val displayActions = contentState !is RoomListContentState.Migration
 
     sealed interface ContextMenu {
         data object Hidden : ContextMenu
@@ -70,3 +66,14 @@ enum class SecurityBannerState {
     SessionVerification,
     RecoveryKeyConfirmation,
 }
+
+sealed interface RoomListContentState {
+    data object Migration : RoomListContentState
+    data class Skeleton(val count: Int) : RoomListContentState
+    data class Empty(val invitesState: InvitesState) : RoomListContentState
+    data class Rooms(
+        val invitesState: InvitesState,
+        val securityBannerState: SecurityBannerState,
+        val summaries: ImmutableList<RoomListRoomSummary>,
+    ) : RoomListContentState
+}

features/roomlist/impl/src/main/kotlin/io/element/android/features/roomlist/impl/RoomListStateProvider.kt

@@ -19,7 +19,6 @@ package io.element.android.features.roomlist.impl
 import androidx.compose.ui.tooling.preview.PreviewParameterProvider
 import io.element.android.features.leaveroom.api.LeaveRoomState
 import io.element.android.features.leaveroom.api.aLeaveRoomState
-import io.element.android.features.roomlist.impl.datasource.RoomListRoomSummaryFactory
 import io.element.android.features.roomlist.impl.filters.RoomListFiltersState
 import io.element.android.features.roomlist.impl.filters.aRoomListFiltersState
 import io.element.android.features.roomlist.impl.model.RoomListRoomSummary
@@ -36,6 +35,7 @@ import io.element.android.libraries.matrix.api.user.MatrixUser
 import io.element.android.libraries.ui.strings.CommonStrings
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.persistentListOf
+import kotlinx.collections.immutable.toPersistentList
 
 open class RoomListStateProvider : PreviewParameterProvider<RoomListState> {
     override val values: Sequence<RoomListState>
@@ -50,7 +50,7 @@ open class RoomListStateProvider : PreviewParameterProvider<RoomListState> {
             aRoomListState(securityBannerState = SecurityBannerState.SessionVerification),
             aRoomListState(securityBannerState = SecurityBannerState.RecoveryKeyConfirmation),
             aRoomListState(roomList = AsyncData.Success(persistentListOf())),
-            aRoomListState(roomList = AsyncData.Loading(prevData = RoomListRoomSummaryFactory.createFakeList())),
+            //aRoomListState(roomList = AsyncData.Loading(prevData = RoomListRoomSummaryFactory.createFakeList())),
             aRoomListState(matrixUser = null, displayMigrationStatus = true),
             aRoomListState(searchState = aRoomListSearchState(isSearchActive = true, query = "Test")),
             aRoomListState(filtersState = aRoomListFiltersState(isFeatureEnabled = true)),
@@ -74,16 +74,17 @@ internal fun aRoomListState(
 ) = RoomListState(
     matrixUser = matrixUser,
     showAvatarIndicator = showAvatarIndicator,
-    roomList = roomList,
     hasNetworkConnection = hasNetworkConnection,
     snackbarMessage = snackbarMessage,
-    securityBannerState = securityBannerState,
-    invitesState = invitesState,
     contextMenu = contextMenu,
     leaveRoomState = leaveRoomState,
-    searchState = searchState,
     filtersState = filtersState,
-    displayMigrationStatus = displayMigrationStatus,
+    searchState = searchState,
+    contentState = RoomListContentState.Rooms(
+        invitesState = invitesState,
+        securityBannerState = securityBannerState,
+        summaries = roomList.dataOrNull().orEmpty().toPersistentList(),
+    ),
     eventSink = eventSink,
 )
 

features/roomlist/impl/src/main/kotlin/io/element/android/features/roomlist/impl/RoomListView.kt

@@ -53,6 +53,7 @@ import io.element.android.features.leaveroom.api.LeaveRoomView
 import io.element.android.features.networkmonitor.api.ui.ConnectivityIndicatorContainer
 import io.element.android.features.roomlist.impl.components.ConfirmRecoveryKeyBanner
 import io.element.android.features.roomlist.impl.components.RequestVerificationHeader
+import io.element.android.features.roomlist.impl.components.RoomListContentView
 import io.element.android.features.roomlist.impl.components.RoomListMenuAction
 import io.element.android.features.roomlist.impl.components.RoomListTopBar
 import io.element.android.features.roomlist.impl.components.RoomSummaryRow
@@ -108,7 +109,7 @@ fun RoomListView(
 
             LeaveRoomView(state = state.leaveRoomState)
 
-            RoomListContent(
+            RoomListScaffold(
                 modifier = Modifier.padding(top = topPadding),
                 state = state,
                 onVerifyClicked = onVerifyClicked,
@@ -135,43 +136,9 @@ fun RoomListView(
     }
 }
 
-@Composable
-private fun EmptyRoomListView(
-    onCreateRoomClicked: () -> Unit,
-    modifier: Modifier = Modifier
-) {
-    Column(
-        modifier = modifier
-            .fillMaxSize()
-            .padding(horizontal = 16.dp),
-        horizontalAlignment = Alignment.CenterHorizontally,
-        verticalArrangement = Arrangement.Center
-    ) {
-        Text(
-            text = stringResource(R.string.screen_roomlist_empty_title),
-            style = ElementTheme.typography.fontBodyLgRegular,
-            color = ElementTheme.colors.textSecondary,
-            textAlign = TextAlign.Center,
-        )
-        Spacer(modifier = Modifier.height(4.dp))
-        Text(
-            text = stringResource(R.string.screen_roomlist_empty_message),
-            style = ElementTheme.typography.fontBodyLgRegular,
-            color = ElementTheme.colors.textSecondary,
-            textAlign = TextAlign.Center,
-        )
-        Spacer(modifier = Modifier.height(16.dp))
-        Button(
-            text = stringResource(CommonStrings.action_start_chat),
-            leadingIcon = IconSource.Vector(CompoundIcons.Compose()),
-            onClick = onCreateRoomClicked,
-        )
-    }
-}
-
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
-private fun RoomListContent(
+private fun RoomListScaffold(
     state: RoomListState,
     onVerifyClicked: () -> Unit,
     onConfirmRecoveryKeyClicked: () -> Unit,
@@ -188,26 +155,7 @@ private fun RoomListContent(
     }
 
     val appBarState = rememberTopAppBarState()
-    val lazyListState = rememberLazyListState()
-
-    val visibleRange by remember {
-        derivedStateOf {
-            val layoutInfo = lazyListState.layoutInfo
-            val firstItemIndex = layoutInfo.visibleItemsInfo.firstOrNull()?.index ?: 0
-            val size = layoutInfo.visibleItemsInfo.size
-            firstItemIndex until firstItemIndex + size
-        }
-    }
     val scrollBehavior = TopAppBarDefaults.exitUntilCollapsedScrollBehavior(appBarState)
-    val nestedScrollConnection = remember {
-        object : NestedScrollConnection {
-            override suspend fun onPostFling(consumed: Velocity, available: Velocity): Velocity {
-                state.eventSink(RoomListEvents.UpdateVisibleRange(visibleRange))
-                return super.onPostFling(consumed, available)
-            }
-        }
-    }
-
     val snackbarHostState = rememberSnackbarHostState(snackbarMessage = state.snackbarMessage)
 
     Scaffold(
@@ -222,7 +170,7 @@ private fun RoomListContent(
                     onMenuActionClicked = onMenuActionClicked,
                     onOpenSettings = onOpenSettings,
                     scrollBehavior = scrollBehavior,
-                    displayMenuItems = !state.displayMigrationStatus,
+                    displayMenuItems = !state.displayActions,
                 )
                 if (state.displayFilters) {
                     RoomListFiltersView(state = state.filtersState)
@@ -230,69 +178,22 @@ private fun RoomListContent(
             }
         },
         content = { padding ->
-            LazyColumn(
+            RoomListContentView(
+                contentState = state.contentState,
+                eventSink = state.eventSink,
+                onVerifyClicked = onVerifyClicked,
+                onConfirmRecoveryKeyClicked = onConfirmRecoveryKeyClicked,
+                onRoomClicked = ::onRoomClicked,
+                onRoomLongClicked = onRoomLongClicked,
+                onCreateRoomClicked = onCreateRoomClicked,
+                onInvitesClicked = onInvitesClicked,
                 modifier = Modifier
                     .padding(padding)
                     .consumeWindowInsets(padding)
-                    .nestedScroll(nestedScrollConnection),
+            )
-                state = lazyListState,
-                // FAB height is 56dp, bottom padding is 16dp, we add 8dp as extra margin -> 56+16+8 = 80
-                contentPadding = PaddingValues(bottom = 80.dp)
-            ) {
-                when {
-                    state.displayEmptyState -> Unit
-                    state.securityBannerState == SecurityBannerState.SessionVerification -> {
-                        item {
-                            RequestVerificationHeader(
-                                onVerifyClicked = onVerifyClicked,
-                                onDismissClicked = { state.eventSink(RoomListEvents.DismissRequestVerificationPrompt) }
-                            )
-                        }
-                    }
-                    state.securityBannerState == SecurityBannerState.RecoveryKeyConfirmation -> {
-                        item {
-                            ConfirmRecoveryKeyBanner(
-                                onContinueClicked = onConfirmRecoveryKeyClicked,
-                                onDismissClicked = { state.eventSink(RoomListEvents.DismissRecoveryKeyPrompt) }
-                            )
-                        }
-                    }
-                }
-
-                if (state.invitesState != InvitesState.NoInvites) {
-                    item {
-                        InvitesEntryPointView(onInvitesClicked, state.invitesState)
-                    }
-                }
-
-                val roomList = state.roomList.dataOrNull().orEmpty()
-                // Note: do not use a key for the LazyColumn, or the scroll will not behave as expected if a room
-                // is moved to the top of the list.
-                itemsIndexed(
-                    items = roomList,
-                    contentType = { _, room -> room.contentType() },
-                ) { index, room ->
-                    RoomSummaryRow(
-                        room = room,
-                        onClick = ::onRoomClicked,
-                        onLongClick = onRoomLongClicked,
-                    )
-                    if (index != roomList.lastIndex) {
-                        HorizontalDivider()
-                    }
-                }
-            }
-            if (state.displayEmptyState) {
-                if (state.filtersState.hasAnyFilterSelected) {
-                    // TODO add empty state for filtered rooms
-                } else {
-                    EmptyRoomListView(onCreateRoomClicked)
-                }
-            }
-            MigrationScreenView(isMigrating = state.displayMigrationStatus)
         },
         floatingActionButton = {
-            if (!state.displayMigrationStatus) {
+            if (state.displayActions) {
                 FloatingActionButton(
                     // FIXME align on Design system theme
                     containerColor = MaterialTheme.colorScheme.primary,

features/roomlist/impl/src/main/kotlin/io/element/android/features/roomlist/impl/components/RoomListContentView.kt

@@ -0,0 +1,255 @@
+/*
+ * Copyright (c) 2024 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.element.android.features.roomlist.impl.components
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.derivedStateOf
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.input.nestedscroll.NestedScrollConnection
+import androidx.compose.ui.input.nestedscroll.nestedScroll
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.Velocity
+import androidx.compose.ui.unit.dp
+import io.element.android.compound.theme.ElementTheme
+import io.element.android.compound.tokens.generated.CompoundIcons
+import io.element.android.features.roomlist.impl.InvitesEntryPointView
+import io.element.android.features.roomlist.impl.InvitesState
+import io.element.android.features.roomlist.impl.R
+import io.element.android.features.roomlist.impl.RoomListContentState
+import io.element.android.features.roomlist.impl.RoomListEvents
+import io.element.android.features.roomlist.impl.SecurityBannerState
+import io.element.android.features.roomlist.impl.contentType
+import io.element.android.features.roomlist.impl.migration.MigrationScreenView
+import io.element.android.features.roomlist.impl.model.RoomListRoomSummary
+import io.element.android.libraries.designsystem.theme.components.Button
+import io.element.android.libraries.designsystem.theme.components.HorizontalDivider
+import io.element.android.libraries.designsystem.theme.components.IconSource
+import io.element.android.libraries.designsystem.theme.components.Text
+import io.element.android.libraries.ui.strings.CommonStrings
+
+@Composable
+fun RoomListContentView(
+    contentState: RoomListContentState,
+    eventSink: (RoomListEvents) -> Unit,
+    onVerifyClicked: () -> Unit,
+    onConfirmRecoveryKeyClicked: () -> Unit,
+    onRoomClicked: (RoomListRoomSummary) -> Unit,
+    onRoomLongClicked: (RoomListRoomSummary) -> Unit,
+    onCreateRoomClicked: () -> Unit,
+    onInvitesClicked: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    Box(modifier = modifier) {
+        when (contentState) {
+            is RoomListContentState.Migration -> {
+                MigrationScreenView(isMigrating = true)
+            }
+            is RoomListContentState.Skeleton -> {
+                SkeletonView(
+                    count = contentState.count,
+                )
+            }
+            is RoomListContentState.Empty -> {
+                EmptyView(
+                    state = contentState,
+                    onInvitesClicked = onInvitesClicked,
+                    onCreateRoomClicked = onCreateRoomClicked,
+                )
+            }
+            is RoomListContentState.Rooms -> {
+                RoomsView(
+                    state = contentState,
+                    eventSink = eventSink,
+                    onVerifyClicked = onVerifyClicked,
+                    onConfirmRecoveryKeyClicked = onConfirmRecoveryKeyClicked,
+                    onRoomClicked = onRoomClicked,
+                    onRoomLongClicked = onRoomLongClicked,
+                    onInvitesClicked = onInvitesClicked,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun SkeletonView(count: Int, modifier: Modifier = Modifier) {
+    LazyColumn(modifier = modifier) {
+        repeat(count) { index ->
+            item {
+                RoomSummaryPlaceholderRow()
+                if (index != count - 1) {
+                    HorizontalDivider()
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun EmptyView(
+    state: RoomListContentState.Empty,
+    onCreateRoomClicked: () -> Unit,
+    onInvitesClicked: () -> Unit,
+    modifier: Modifier = Modifier
+) {
+    Box(
+        modifier = modifier.fillMaxSize(),
+    ) {
+        if (state.invitesState != InvitesState.NoInvites) {
+            InvitesEntryPointView(onInvitesClicked, state.invitesState)
+        }
+        EmptyScaffold(
+            title = {
+                Text(
+                    text = stringResource(R.string.screen_roomlist_empty_title),
+                    style = ElementTheme.typography.fontBodyLgRegular,
+                    color = ElementTheme.colors.textSecondary,
+                    textAlign = TextAlign.Center,
+                )
+            },
+            subtitle = {
+                Text(
+                    text = stringResource(R.string.screen_roomlist_empty_message),
+                    style = ElementTheme.typography.fontBodyLgRegular,
+                    color = ElementTheme.colors.textSecondary,
+                    textAlign = TextAlign.Center,
+                )
+            },
+            action = {
+                Button(
+                    text = stringResource(CommonStrings.action_start_chat),
+                    leadingIcon = IconSource.Vector(CompoundIcons.Compose()),
+                    onClick = onCreateRoomClicked,
+                )
+            },
+            modifier = Modifier,
+        )
+    }
+}
+
+@Composable
+private fun RoomsView(
+    state: RoomListContentState.Rooms,
+    eventSink: (RoomListEvents) -> Unit,
+    onVerifyClicked: () -> Unit,
+    onConfirmRecoveryKeyClicked: () -> Unit,
+    onRoomClicked: (RoomListRoomSummary) -> Unit,
+    onRoomLongClicked: (RoomListRoomSummary) -> Unit,
+    onInvitesClicked: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    val lazyListState = rememberLazyListState()
+    val visibleRange by remember {
+        derivedStateOf {
+            val layoutInfo = lazyListState.layoutInfo
+            val firstItemIndex = layoutInfo.visibleItemsInfo.firstOrNull()?.index ?: 0
+            val size = layoutInfo.visibleItemsInfo.size
+            firstItemIndex until firstItemIndex + size
+        }
+    }
+    val nestedScrollConnection = remember {
+        object : NestedScrollConnection {
+            override suspend fun onPostFling(consumed: Velocity, available: Velocity): Velocity {
+                eventSink(RoomListEvents.UpdateVisibleRange(visibleRange))
+                return super.onPostFling(consumed, available)
+            }
+        }
+    }
+    LazyColumn(
+        state = lazyListState,
+        modifier = modifier.nestedScroll(nestedScrollConnection),
+        verticalArrangement = Arrangement.spacedBy(8.dp)
+    ) {
+        when (state.securityBannerState) {
+            SecurityBannerState.SessionVerification -> {
+                item {
+                    RequestVerificationHeader(
+                        onVerifyClicked = onVerifyClicked,
+                        onDismissClicked = { eventSink(RoomListEvents.DismissRequestVerificationPrompt) }
+                    )
+                }
+            }
+            SecurityBannerState.RecoveryKeyConfirmation -> {
+                item {
+                    ConfirmRecoveryKeyBanner(
+                        onContinueClicked = onConfirmRecoveryKeyClicked,
+                        onDismissClicked = { eventSink(RoomListEvents.DismissRecoveryKeyPrompt) }
+                    )
+                }
+            }
+            else -> Unit
+        }
+
+        if (state.invitesState != InvitesState.NoInvites) {
+            item {
+                InvitesEntryPointView(onInvitesClicked, state.invitesState)
+            }
+        }
+        // Note: do not use a key for the LazyColumn, or the scroll will not behave as expected if a room
+        // is moved to the top of the list.
+        itemsIndexed(
+            items = state.summaries,
+            contentType = { _, room -> room.contentType() },
+        ) { index, room ->
+            RoomSummaryRow(
+                room = room,
+                onClick = onRoomClicked,
+                onLongClick = onRoomLongClicked,
+            )
+            if (index != state.summaries.lastIndex) {
+                HorizontalDivider()
+            }
+        }
+    }
+}
+
+@Composable
+private fun EmptyScaffold(
+    title: @Composable () -> Unit,
+    modifier: Modifier = Modifier,
+    subtitle: @Composable (() -> Unit)? = null,
+    action: @Composable (() -> Unit)? = null,
+) {
+    Column(
+        modifier = modifier
+            .fillMaxSize()
+            .padding(horizontal = 60.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        title()
+        Spacer(modifier = Modifier.height(4.dp))
+        subtitle?.invoke()
+        Spacer(modifier = Modifier.height(16.dp))
+        action?.invoke()
+    }
+}
+

features/roomlist/impl/src/main/kotlin/io/element/android/features/roomlist/impl/datasource/RoomListDataSource.kt

@@ -27,8 +27,10 @@ import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.toImmutableList
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.debounce
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
@@ -62,19 +64,15 @@ class RoomListDataSource @Inject constructor(
         roomListService
             .allRooms
             .summaries
-            .onStart {
-                // If we have no cached results, display a placeholder loading state
-                if (diffCache.isEmpty()) {
-                    _allRooms.emit(RoomListRoomSummaryFactory.createFakeList())
-                }
-            }
             .onEach { roomSummaries ->
                 replaceWith(roomSummaries)
             }
             .launchIn(coroutineScope)
     }
 
-    val allRooms: SharedFlow<ImmutableList<RoomListRoomSummary>> = _allRooms
+    val allRooms: Flow<ImmutableList<RoomListRoomSummary>> = _allRooms
+
+    val loadingState = roomListService.allRooms.loadingState
 
     @OptIn(FlowPreview::class)
     private fun observeNotificationSettings() {

features/roomlist/impl/src/main/kotlin/io/element/android/features/roomlist/impl/datasource/RoomListRoomSummaryFactory.kt

@@ -53,11 +53,6 @@ class RoomListRoomSummaryFactory @Inject constructor(
             )
         }
 
-        fun createFakeList(): ImmutableList<RoomListRoomSummary> {
-            return List(16) {
-                createPlaceholder("!fakeRoom$it:domain")
-            }.toImmutableList()
-        }
     }
 
     fun create(roomSummary: RoomSummary.Filled): RoomListRoomSummary {