Split MainNavigationRouter into focused domain-specific routers.

app/src/main/java/org/thoughtcrime/securesms/MainActivity.kt

@@ -85,7 +85,6 @@ import kotlinx.coroutines.withContext
 import org.signal.core.ui.BottomSheetUtil
 import org.signal.core.ui.compose.Snackbars
 import org.signal.core.ui.compose.theme.SignalTheme
-import org.signal.core.ui.isSplitPane
 import org.signal.core.ui.permissions.Permissions
 import org.signal.core.ui.rememberIsSplitPane
 import org.signal.core.util.Util
@@ -521,15 +520,14 @@ class MainActivity :
                 }.navigateToDetailLocation(location)
               }
 
-              is MainNavigationDetailLocation.Chats -> {
-                if (location is MainNavigationDetailLocation.Chats.Conversation) {
-                  chatNavGraphState.writeGraphicsLayerToBitmap()
-                }
+              is MainNavigationDetailLocation.Conversation -> {
+                chatNavGraphState.writeGraphicsLayerToBitmap()
                 chatsNavHostController.navigateToDetailLocation(location)
               }
 
+              is MainNavigationDetailLocation.Chats -> chatsNavHostController.navigateToDetailLocation(location)
+              is MainNavigationDetailLocation.CallLinkDetails -> callsNavHostController.navigateToDetailLocation(location)
               is MainNavigationDetailLocation.Calls -> callsNavHostController.navigateToDetailLocation(location)
-
               is MainNavigationDetailLocation.Stories -> storiesNavHostController.navigateToDetailLocation(location)
             }
           }
@@ -1034,7 +1032,7 @@ class MainActivity :
   private fun handleConversationIntent(intent: Intent) {
     if (ConversationIntents.isConversationIntent(intent)) {
       mainNavigationViewModel.goTo(MainNavigationListLocation.CHATS)
-      mainNavigationViewModel.goTo(MainNavigationDetailLocation.Chats.Conversation(ConversationIntents.readArgsFromBundle(intent.extras!!)))
+      mainNavigationViewModel.goTo(MainNavigationDetailLocation.Conversation(ConversationIntents.readArgsFromBundle(intent.extras!!)))
       intent.action = null
       setIntent(intent)
     }

app/src/main/java/org/thoughtcrime/securesms/MainNavigator.java

@@ -50,7 +50,7 @@ public class MainNavigator {
                                                                       .withStartingPosition(startingPosition)
                                                                       .asIncognito(incognito)
                                                                       .toConversationArgs())
-                                               .subscribe(args -> viewModel.goTo(new MainNavigationDetailLocation.Chats.Conversation(args)));
+                                               .subscribe(args -> viewModel.goTo(new MainNavigationDetailLocation.Conversation(args)));
 
     lifecycleDisposable.add(disposable);
   }

app/src/main/java/org/thoughtcrime/securesms/calls/links/details/CallLinkDetailsActivity.kt

@@ -16,9 +16,8 @@ import androidx.fragment.app.FragmentActivity
 import org.signal.core.ui.compose.theme.SignalTheme
 import org.signal.core.util.getParcelableExtraCompat
 import org.thoughtcrime.securesms.calls.links.EditCallLinkNameDialogFragment
+import org.thoughtcrime.securesms.main.MainNavigationCallDetailRouter
 import org.thoughtcrime.securesms.main.MainNavigationDetailLocation
-import org.thoughtcrime.securesms.main.MainNavigationListLocation
-import org.thoughtcrime.securesms.main.MainNavigationRouter
 import org.thoughtcrime.securesms.service.webrtc.links.CallLinkRoomId
 import org.thoughtcrime.securesms.util.viewModel
 
@@ -56,23 +55,17 @@ class CallLinkDetailsActivity : FragmentActivity() {
     }
   }
 
-  private inner class Router : MainNavigationRouter {
-    override fun goTo(location: MainNavigationDetailLocation) {
+  private inner class Router : MainNavigationCallDetailRouter {
+    override fun goToCallDetail(location: MainNavigationDetailLocation.Calls) {
       when (location) {
         is MainNavigationDetailLocation.Calls.CallLinks.EditCallLinkName -> {
           EditCallLinkNameDialogFragment().apply {
             arguments = bundleOf(EditCallLinkNameDialogFragment.ARG_NAME to viewModel.nameSnapshot)
           }.show(supportFragmentManager, null)
         }
-
-        is MainNavigationDetailLocation.Empty -> {
-          finishAfterTransition()
-        }
-
-        else -> error("Unsupported route $location")
       }
     }
 
-    override fun goTo(location: MainNavigationListLocation) = Unit
+    override fun exitDetailLocation() = finishAfterTransition()
   }
 }

app/src/main/java/org/thoughtcrime/securesms/calls/links/details/CallLinkDetailsScreen.kt

@@ -46,8 +46,8 @@ import org.thoughtcrime.securesms.calls.YouAreAlreadyInACallSnackbar.YouAreAlrea
 import org.thoughtcrime.securesms.calls.links.CallLinks
 import org.thoughtcrime.securesms.calls.links.SignalCallRow
 import org.thoughtcrime.securesms.database.CallLinkTable
+import org.thoughtcrime.securesms.main.MainNavigationCallDetailRouter
 import org.thoughtcrime.securesms.main.MainNavigationDetailLocation
-import org.thoughtcrime.securesms.main.MainNavigationRouter
 import org.thoughtcrime.securesms.main.MainNavigationViewModel
 import org.thoughtcrime.securesms.recipients.RecipientId
 import org.thoughtcrime.securesms.service.webrtc.links.CallLinkCredentials
@@ -63,7 +63,7 @@ fun CallLinkDetailsScreen(
   viewModel: CallLinkDetailsViewModel = viewModel {
     CallLinkDetailsViewModel(roomId)
   },
-  router: MainNavigationRouter = viewModel<MainNavigationViewModel>(viewModelStoreOwner = LocalActivity.current as ComponentActivity) {
+  router: MainNavigationCallDetailRouter = viewModel<MainNavigationViewModel>(viewModelStoreOwner = LocalActivity.current as ComponentActivity) {
     error("Should already be created.")
   }
 ) {
@@ -90,7 +90,7 @@ fun CallLinkDetailsScreen(
 class DefaultCallLinkDetailsCallback(
   private val activity: FragmentActivity,
   private val viewModel: CallLinkDetailsViewModel,
-  private val router: MainNavigationRouter
+  private val router: MainNavigationCallDetailRouter
 ) : CallLinkDetailsCallback {
 
   private val lifecycleDisposable = LifecycleDisposable()
@@ -113,7 +113,7 @@ class DefaultCallLinkDetailsCallback(
   }
 
   override fun onEditNameClicked() {
-    router.goTo(MainNavigationDetailLocation.Calls.CallLinks.EditCallLinkName(callLinkRoomId = viewModel.recipientSnapshot!!.requireCallLinkRoomId()))
+    router.goToCallDetail(MainNavigationDetailLocation.Calls.CallLinks.EditCallLinkName(callLinkRoomId = viewModel.recipientSnapshot!!.requireCallLinkRoomId()))
   }
 
   override fun onShareClicked() {
@@ -152,7 +152,7 @@ class DefaultCallLinkDetailsCallback(
     viewModel.setDisplayRevocationDialog(false)
     activity.lifecycleScope.launch {
       if (viewModel.delete()) {
-        router.goTo(MainNavigationDetailLocation.Empty)
+        router.exitDetailLocation()
       }
     }
   }

app/src/main/java/org/thoughtcrime/securesms/calls/log/CallLogFragment.kt

@@ -333,7 +333,7 @@ class CallLogFragment : Fragment(R.layout.call_log_fragment), CallLogAdapter.Cal
     if (viewModel.selectionStateSnapshot.isNotEmpty(binding.recycler.adapter!!.itemCount)) {
       viewModel.toggleSelected(callLogRow.id)
     } else {
-      mainNavigationViewModel.goTo(MainNavigationDetailLocation.Calls.CallLinks.CallLinkDetails(callLogRow.record.roomId))
+      mainNavigationViewModel.goTo(MainNavigationDetailLocation.CallLinkDetails(callLogRow.record.roomId))
     }
   }
 

app/src/main/java/org/thoughtcrime/securesms/components/settings/conversation/ConversationSettingsFragment.kt

@@ -92,8 +92,8 @@ import org.thoughtcrime.securesms.groups.ui.managegroup.dialogs.GroupDescription
 import org.thoughtcrime.securesms.groups.ui.managegroup.dialogs.GroupInviteSentDialog
 import org.thoughtcrime.securesms.groups.ui.managegroup.dialogs.GroupsLearnMoreBottomSheetDialogFragment
 import org.thoughtcrime.securesms.keyvalue.SignalStore
+import org.thoughtcrime.securesms.main.MainNavigationChatDetailRouter
 import org.thoughtcrime.securesms.main.MainNavigationDetailLocation
-import org.thoughtcrime.securesms.main.MainNavigationRouter
 import org.thoughtcrime.securesms.mediaoverview.MediaOverviewActivity
 import org.thoughtcrime.securesms.mediapreview.MediaIntentFactory
 import org.thoughtcrime.securesms.mediasend.camerax.CameraXRemoteConfig
@@ -179,7 +179,7 @@ class ConversationSettingsFragment :
   )
 
   private var transitionCallback: TransitionCallback? = null
-  private var mainNavRouter: MainNavigationRouter? = null
+  private var chatRouter: MainNavigationChatDetailRouter? = null
 
   private lateinit var toolbar: Toolbar
   private lateinit var toolbarAvatarContainer: FrameLayout
@@ -196,7 +196,7 @@ class ConversationSettingsFragment :
   override fun onAttach(context: Context) {
     super.onAttach(context)
     transitionCallback = context as? TransitionCallback
-    mainNavRouter = context as? MainNavigationRouter
+    chatRouter = context as? MainNavigationChatDetailRouter
   }
 
   override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -263,8 +263,8 @@ class ConversationSettingsFragment :
   }
 
   private fun goToConversationList() {
-    if (mainNavRouter != null) {
-      mainNavRouter?.goTo(MainNavigationDetailLocation.Empty)
+    if (chatRouter != null) {
+      chatRouter?.exitDetailLocation()
     } else {
       startActivity(MainActivity.clearTopAndOpenDetail(requireContext(), MainNavigationDetailLocation.Empty))
     }

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationFragment.kt

@@ -293,9 +293,9 @@ import org.thoughtcrime.securesms.keyvalue.SignalStore
 import org.thoughtcrime.securesms.linkpreview.LinkPreview
 import org.thoughtcrime.securesms.linkpreview.LinkPreviewViewModelV2
 import org.thoughtcrime.securesms.longmessage.LongMessageFragment
+import org.thoughtcrime.securesms.main.MainNavigationChatDetailRouter
 import org.thoughtcrime.securesms.main.MainNavigationDetailLocation
 import org.thoughtcrime.securesms.main.MainNavigationListLocation
-import org.thoughtcrime.securesms.main.MainNavigationRouter
 import org.thoughtcrime.securesms.main.MainNavigationViewModel
 import org.thoughtcrime.securesms.main.MainSnackbarHostKey
 import org.thoughtcrime.securesms.mediaoverview.MediaOverviewActivity
@@ -582,7 +582,7 @@ class ConversationFragment :
   private lateinit var conversationItemDecorations: ConversationItemDecorations
   private lateinit var optionsMenuCallback: ConversationOptionsMenuCallback
 
-  private var mainNavRouter: MainNavigationRouter? = null
+  private var chatRouter: MainNavigationChatDetailRouter? = null
 
   private var animationsAllowed = false
   private var pinnedShortcutReceiver: BroadcastReceiver? = null
@@ -661,7 +661,7 @@ class ConversationFragment :
 
   override fun onAttach(context: Context) {
     super.onAttach(context)
-    mainNavRouter = context as? MainNavigationRouter
+    chatRouter = context as? MainNavigationChatDetailRouter
   }
 
   override fun onCreate(savedInstanceState: Bundle?) {
@@ -4413,17 +4413,16 @@ class ConversationFragment :
   /**
    * Routes to the appropriate destination based on the current window configuration.
    *
-   * In split-pane mode, delegates to the [MainNavigationRouter] to display content in the detail pane. Otherwise, opens the destination as a standalone screen.
+   * In split-pane mode, delegates to the [MainNavigationChatDetailRouter] to display content in the detail pane. Otherwise, opens the destination as a standalone screen.
    */
   private fun navigateTo(location: MainNavigationDetailLocation.Chats) {
-    val router = mainNavRouter
+    val router = chatRouter
     if (router != null && resources.isSplitPane()) {
-      router.goTo(location)
+      router.goToChatDetail(location)
     } else {
       when (location) {
         is MainNavigationDetailLocation.Chats.MessageDetails -> navigateToMessageDetailsStandalone(location)
         is MainNavigationDetailLocation.Chats.ConversationSettings -> navigateToConversationSettingsStandalone(viewModel.recipientSnapshot!!)
-        is MainNavigationDetailLocation.Chats.Conversation -> error("ConversationFragment shouldn't navigate to another conversation - use the main navigation infrastructure instead.")
       }
     }
   }

app/src/main/java/org/thoughtcrime/securesms/conversationlist/ConversationListFragmentExtensions.kt

@@ -37,7 +37,7 @@ fun Fragment.listenToEventBusWhileResumed(
       .collectLatest {
         if (!resources.isSplitPane()) {
           when (it) {
-            is MainNavigationDetailLocation.Chats.Conversation -> unsubscribe()
+            is MainNavigationDetailLocation.Conversation -> unsubscribe()
             MainNavigationDetailLocation.Empty -> subscribe()
             else -> Unit
           }

app/src/main/java/org/thoughtcrime/securesms/main/CallsNavHost.kt

@@ -28,14 +28,14 @@ fun NavGraphBuilder.callNavGraphBuilder(navHostController: NavHostController) {
     EmptyDetailScreen()
   }
 
-  composable<MainNavigationDetailLocation.Calls.CallLinks.CallLinkDetails>(
+  composable<MainNavigationDetailLocation.CallLinkDetails>(
     typeMap = mapOf(
       callLinkRoomIdType to JsonSerializableNavType(CallLinkRoomId.serializer())
     )
   ) {
     informNavigatorWeAreReady()
 
-    val route = it.toRoute<MainNavigationDetailLocation.Calls.CallLinks.CallLinkDetails>()
+    val route = it.toRoute<MainNavigationDetailLocation.CallLinkDetails>()
 
     CallLinkDetailsScreen(roomId = route.callLinkRoomId)
   }

app/src/main/java/org/thoughtcrime/securesms/main/ChatsNavHost.kt

@@ -73,12 +73,12 @@ fun NavGraphBuilder.chatNavGraphBuilder(
     EmptyDetailScreen()
   }
 
-  composable<MainNavigationDetailLocation.Chats.Conversation>(
+  composable<MainNavigationDetailLocation.Conversation>(
     typeMap = mapOf(
       conversationArgsType to JsonSerializableNavType(ConversationArgs.serializer())
     )
   ) { navBackStackEntry ->
-    val route = navBackStackEntry.toRoute<MainNavigationDetailLocation.Chats.Conversation>()
+    val route = navBackStackEntry.toRoute<MainNavigationDetailLocation.Conversation>()
     val fragmentState = key(route) { rememberFragmentState() }
     val context = LocalContext.current
 

app/src/main/java/org/thoughtcrime/securesms/main/MainNavigationDetailLocation.kt

@@ -19,16 +19,16 @@ import org.thoughtcrime.securesms.recipients.RecipientId
 import org.thoughtcrime.securesms.service.webrtc.links.CallLinkRoomId
 
 /**
- * Describes which content to display in the detail view.
+ * Describes which content to display in the detail pane.
  */
 @Serializable
 @Parcelize
-sealed class MainNavigationDetailLocation : Parcelable {
+sealed interface MainNavigationDetailLocation : Parcelable {
 
   class Saver(
     val earlyLocation: MainNavigationDetailLocation?
   ) : androidx.compose.runtime.saveable.Saver<MainNavigationDetailLocation, String> {
-    override fun SaverScope.save(value: MainNavigationDetailLocation): String? {
+    override fun SaverScope.save(value: MainNavigationDetailLocation): String {
       return Json.encodeToString(value)
     }
 
@@ -42,40 +42,55 @@ sealed class MainNavigationDetailLocation : Parcelable {
    * of a task stack (or on top of Empty)
    */
   @IgnoredOnParcel
-  open val isContentRoot: Boolean = false
+  val isContentRoot: Boolean
+    get() = false
 
   @Serializable
-  data object Empty : MainNavigationDetailLocation() {
+  data object Empty : MainNavigationDetailLocation {
     @Transient
     @IgnoredOnParcel
     override val isContentRoot: Boolean = true
   }
 
+  @Serializable
+  data class Conversation(val conversationArgs: ConversationArgs) : MainNavigationDetailLocation {
+    @Transient
+    @IgnoredOnParcel
+    override val isContentRoot: Boolean = true
+
+    @Transient
+    @IgnoredOnParcel
+    val controllerKey: Long = conversationArgs.threadId
+  }
+
+  @Serializable
+  data class CallLinkDetails(val callLinkRoomId: CallLinkRoomId) : MainNavigationDetailLocation {
+    @Transient
+    @IgnoredOnParcel
+    override val isContentRoot: Boolean = true
+
+    @Transient
+    @IgnoredOnParcel
+    val controllerKey: CallLogRow.Id = CallLogRow.Id.CallLink(callLinkRoomId)
+  }
+
+  /**
+   * Subscreens that can be displayed within the chats tab.
+   */
   @Parcelize
-  sealed class Chats : MainNavigationDetailLocation() {
+  sealed interface Chats : MainNavigationDetailLocation {
 
-    abstract val controllerKey: RecipientId
+    val controllerKey: RecipientId
 
     @Serializable
-    data class Conversation(val conversationArgs: ConversationArgs) : Chats() {
-      @Transient
-      @IgnoredOnParcel
-      override val isContentRoot: Boolean = true
-
-      @Transient
-      @IgnoredOnParcel
-      override val controllerKey: RecipientId = conversationArgs.recipientId
-    }
-
-    @Serializable
-    data class MessageDetails(val recipientId: RecipientId, val messageId: MessageId) : Chats() {
+    data class MessageDetails(val recipientId: RecipientId, val messageId: MessageId) : Chats {
       @Transient
       @IgnoredOnParcel
       override val controllerKey: RecipientId = recipientId
     }
 
     @Serializable
-    data class ConversationSettings(val recipientId: RecipientId) : Chats() {
+    data class ConversationSettings(val recipientId: RecipientId) : Chats {
       @Transient
       @IgnoredOnParcel
       override val controllerKey: RecipientId = recipientId
@@ -83,27 +98,14 @@ sealed class MainNavigationDetailLocation : Parcelable {
   }
 
   /**
-   * Content which can be displayed while the user is navigating the Calls tab.
+   * Subscreens that can be displayed within the calls tab.
    */
   @Parcelize
-  sealed class Calls : MainNavigationDetailLocation() {
-
-    abstract val controllerKey: CallLogRow.Id
+  sealed interface Calls : MainNavigationDetailLocation {
+    val controllerKey: CallLogRow.Id
 
     @Parcelize
-    sealed class CallLinks : Calls() {
-
-      @Serializable
-      data class CallLinkDetails(val callLinkRoomId: CallLinkRoomId) : CallLinks() {
-        @Transient
-        @IgnoredOnParcel
-        override val isContentRoot: Boolean = true
-
-        @Transient
-        @IgnoredOnParcel
-        override val controllerKey: CallLogRow.Id = CallLogRow.Id.CallLink(callLinkRoomId)
-      }
-
+    sealed class CallLinks : Calls {
       @Serializable
       data class EditCallLinkName(val callLinkRoomId: CallLinkRoomId) : CallLinks() {
         @Transient
@@ -114,5 +116,5 @@ sealed class MainNavigationDetailLocation : Parcelable {
   }
 
   @Parcelize
-  sealed class Stories : MainNavigationDetailLocation()
+  sealed class Stories : MainNavigationDetailLocation
 }

app/src/main/java/org/thoughtcrime/securesms/main/MainNavigationRouter.kt

@@ -5,8 +5,30 @@
 
 package org.thoughtcrime.securesms.main
 
-interface MainNavigationRouter {
+/**
+ * Handles navigation for sub-screens within the chats detail pane.
+ */
+interface MainNavigationChatDetailRouter {
+  fun exitDetailLocation()
+  fun goToChatDetail(location: MainNavigationDetailLocation.Chats)
+}
+
+/**
+ * Handles navigation for sub-screens within the calls detail pane.
+ */
+interface MainNavigationCallDetailRouter {
+  fun exitDetailLocation()
+  fun goToCallDetail(location: MainNavigationDetailLocation.Calls)
+}
+
+/**
+ * Handles navigation to all [MainNavigationListLocation]s and [MainNavigationDetailLocation]s, including the top-level roots.
+ */
+interface MainNavigationRouter : MainNavigationChatDetailRouter, MainNavigationCallDetailRouter {
+  fun goTo(location: MainNavigationListLocation)
   fun goTo(location: MainNavigationDetailLocation)
 
-  fun goTo(location: MainNavigationListLocation)
+  override fun goToChatDetail(location: MainNavigationDetailLocation.Chats) = goTo(location)
+  override fun goToCallDetail(location: MainNavigationDetailLocation.Calls) = goTo(location)
+  override fun exitDetailLocation() = goTo(MainNavigationDetailLocation.Empty)
 }

app/src/main/java/org/thoughtcrime/securesms/main/MainNavigationViewModel.kt

@@ -36,7 +36,6 @@ import org.signal.core.util.logging.Log
 import org.thoughtcrime.securesms.calls.log.CallLogRow
 import org.thoughtcrime.securesms.components.settings.app.notifications.profiles.NotificationProfilesRepository
 import org.thoughtcrime.securesms.components.snackbars.SnackbarStateConsumerRegistry
-import org.thoughtcrime.securesms.conversation.ConversationArgs
 import org.thoughtcrime.securesms.dependencies.AppDependencies
 import org.thoughtcrime.securesms.keyvalue.SignalStore
 import org.thoughtcrime.securesms.megaphone.Megaphone
@@ -146,8 +145,12 @@ class MainNavigationViewModel(
     viewModelScope.launch {
       internalDetailLocation.collect { location ->
         when (location) {
-          is MainNavigationDetailLocation.Chats.Conversation -> {
-            internalActiveChatThreadId.update { location.conversationArgs.threadId }
+          is MainNavigationDetailLocation.Conversation -> {
+            internalActiveChatThreadId.update { location.controllerKey }
+          }
+
+          is MainNavigationDetailLocation.CallLinkDetails -> {
+            internalActiveCallId.update { location.controllerKey }
           }
 
           is MainNavigationDetailLocation.Calls -> {
@@ -224,37 +227,19 @@ class MainNavigationViewModel(
    * render) *before* swapping panes. This helps to prevent flashing / duplicate loads.
    */
   override fun goTo(location: MainNavigationDetailLocation) {
-    lockPaneToSecondary = false
-
-    if (navigator == null) {
-      earlyNavigationDetailLocationRequested = location
-      return
-    }
-
     when (location) {
-      is MainNavigationDetailLocation.Chats.Conversation -> goToConversation(location.conversationArgs)
-      else -> {
-        viewModelScope.launch {
-          internalDetailLocation.emit(location)
-        }
-      }
+      is MainNavigationDetailLocation.Empty,
+      is MainNavigationDetailLocation.Chats.ConversationSettings,
+      is MainNavigationDetailLocation.Chats.MessageDetails,
+      is MainNavigationDetailLocation.CallLinkDetails,
+      is MainNavigationDetailLocation.Calls.CallLinks.EditCallLinkName -> setDetailLocation(location)
+
+      is MainNavigationDetailLocation.Conversation -> goToConversation(location)
     }
   }
 
-  override fun goTo(location: MainNavigationListLocation) {
-    lockPaneToSecondary = true
-
-    if (navigator == null) {
-      earlyNavigationListLocationRequested = location
-      return
-    }
-
-    internalMainNavigationState.update {
-      it.copy(currentListLocation = location)
-    }
-  }
-
-  private fun goToConversation(args: ConversationArgs) = viewModelScope.launch {
+  private fun goToConversation(location: MainNavigationDetailLocation.Conversation) = viewModelScope.launch {
+    val args = location.conversationArgs
     val liveRecipient = Recipient.live(args.recipientId)
     val recipientSnapshot = liveRecipient.get()
     val wallpaper = recipientSnapshot.wallpaper
@@ -276,7 +261,33 @@ class MainNavigationViewModel(
       args.copy(hasWallpaper = wallpaper != null)
     }
 
-    internalDetailLocation.emit(MainNavigationDetailLocation.Chats.Conversation(updatedArgs))
+    setDetailLocation(MainNavigationDetailLocation.Conversation(updatedArgs))
+  }
+
+  private fun setDetailLocation(location: MainNavigationDetailLocation) {
+    lockPaneToSecondary = false
+
+    if (navigator == null) {
+      earlyNavigationDetailLocationRequested = location
+      return
+    }
+
+    viewModelScope.launch {
+      internalDetailLocation.emit(location)
+    }
+  }
+
+  override fun goTo(location: MainNavigationListLocation) {
+    lockPaneToSecondary = true
+
+    if (navigator == null) {
+      earlyNavigationListLocationRequested = location
+      return
+    }
+
+    internalMainNavigationState.update {
+      it.copy(currentListLocation = location)
+    }
   }
 
   fun goToCameraFirstStoryCapture() {