Merge pull request #6986 from vector-im/feature/nfe/invites_empty_state

empty state for new invites screen

changelog.d/6876.feature

@@ -0,0 +1 @@
+[App Layout] - Invites now show empty screen after you reject last invite

library/ui-strings/src/main/res/values/strings.xml

@@ -451,6 +451,9 @@
     <!-- Invites fragment -->
     <string name="invites_title">Invites</string>
 
+    <string name="invites_empty_title">Nothing new.</string>
+    <string name="invites_empty_message">This is where your new requests and invites will be.</string>
+
     <!-- People fragment -->
     <string name="direct_chats_header">Conversations</string>
     <string name="matrix_only_filter">Matrix contacts only</string>

vector/src/main/java/im/vector/app/features/home/room/list/home/invites/InvitesFragment.kt

@@ -20,15 +20,18 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.lifecycle.lifecycleScope
 import com.airbnb.mvrx.fragmentViewModel
-import com.airbnb.mvrx.withState
 import dagger.hilt.android.AndroidEntryPoint
 import im.vector.app.core.extensions.configureWith
+import im.vector.app.core.platform.StateView
 import im.vector.app.core.platform.VectorBaseFragment
 import im.vector.app.databinding.FragmentInvitesBinding
 import im.vector.app.features.analytics.plan.ViewRoom
 import im.vector.app.features.home.room.list.RoomListListener
 import im.vector.app.features.notifications.NotificationDrawerManager
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
 import org.matrix.android.sdk.api.session.room.model.RoomSummary
 import org.matrix.android.sdk.api.session.room.model.SpaceChildInfo
 import javax.inject.Inject
@@ -51,6 +54,8 @@ class InvitesFragment : VectorBaseFragment<FragmentInvitesBinding>(), RoomListLi
         setupToolbar(views.invitesToolbar)
                 .allowBack()
 
+        views.invitesStateView.contentView = views.invitesRecycler
+
         views.invitesRecycler.configureWith(controller)
         controller.listener = this
 
@@ -62,13 +67,31 @@ class InvitesFragment : VectorBaseFragment<FragmentInvitesBinding>(), RoomListLi
             when (it) {
                 is InvitesViewEvents.Failure -> showFailure(it.throwable)
                 is InvitesViewEvents.OpenRoom -> handleOpenRoom(it.roomSummary, it.shouldCloseInviteView)
-                InvitesViewEvents.Close -> handleClose()
-            }
             }
         }
 
-    private fun handleClose() {
-        requireActivity().finish()
+        viewModel.invites.onEach {
+            when (it) {
+                is InvitesContentState.Content -> {
+                    views.invitesStateView.state = StateView.State.Content
+                    controller.submitList(it.content)
+                }
+                is InvitesContentState.Empty -> {
+                    views.invitesStateView.state = StateView.State.Empty(
+                            title = it.title,
+                            image = it.image,
+                            message = it.message
+                    )
+                }
+                is InvitesContentState.Error -> {
+                    when (views.invitesStateView.state) {
+                        StateView.State.Content -> showErrorInSnackbar(it.throwable)
+                        else -> views.invitesStateView.state = StateView.State.Error(it.throwable.message)
+                    }
+                }
+                InvitesContentState.Loading -> views.invitesStateView.state = StateView.State.Loading
+            }
+        }.launchIn(viewLifecycleOwner.lifecycleScope)
     }
 
     private fun handleOpenRoom(roomSummary: RoomSummary, shouldCloseInviteView: Boolean) {
@@ -83,14 +106,6 @@ class InvitesFragment : VectorBaseFragment<FragmentInvitesBinding>(), RoomListLi
         }
     }
 
-    override fun invalidate(): Unit = withState(viewModel) { state ->
-        super.invalidate()
-
-        state.pagedList?.observe(viewLifecycleOwner) { list ->
-            controller.submitList(list)
-        }
-    }
-
     override fun onRejectRoomInvitation(room: RoomSummary) {
         notificationDrawerManager.updateEvents { it.clearMemberShipNotificationForRoom(room.roomId) }
         viewModel.handle(InvitesAction.RejectInvitation(room))

vector/src/main/java/im/vector/app/features/home/room/list/home/invites/InvitesViewEvents.kt

@@ -22,5 +22,4 @@ import org.matrix.android.sdk.api.session.room.model.RoomSummary
 sealed class InvitesViewEvents : VectorViewEvents {
     data class Failure(val throwable: Throwable) : InvitesViewEvents()
     data class OpenRoom(val roomSummary: RoomSummary, val shouldCloseInviteView: Boolean) : InvitesViewEvents()
-    object Close : InvitesViewEvents()
 }

vector/src/main/java/im/vector/app/features/home/room/list/home/invites/InvitesViewModel.kt

@@ -16,14 +16,25 @@
 
 package im.vector.app.features.home.room.list.home.invites
 
+import androidx.lifecycle.asFlow
 import androidx.paging.PagedList
 import com.airbnb.mvrx.MavericksViewModelFactory
 import dagger.assisted.Assisted
 import dagger.assisted.AssistedFactory
 import dagger.assisted.AssistedInject
+import im.vector.app.R
 import im.vector.app.core.di.MavericksAssistedViewModelFactory
 import im.vector.app.core.di.hiltMavericksViewModelFactory
 import im.vector.app.core.platform.VectorViewModel
+import im.vector.app.core.resources.DrawableProvider
+import im.vector.app.core.resources.StringProvider
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.flow.onStart
 import kotlinx.coroutines.launch
 import org.matrix.android.sdk.api.extensions.orFalse
 import org.matrix.android.sdk.api.session.Session
@@ -36,6 +47,8 @@ import timber.log.Timber
 class InvitesViewModel @AssistedInject constructor(
         @Assisted val initialState: InvitesViewState,
         private val session: Session,
+        private val stringProvider: StringProvider,
+        private val drawableProvider: DrawableProvider
 ) : VectorViewModel<InvitesViewState, InvitesAction, InvitesViewEvents>(initialState) {
 
     private val pagedListConfig = PagedList.Config.Builder()
@@ -52,6 +65,11 @@ class InvitesViewModel @AssistedInject constructor(
 
     companion object : MavericksViewModelFactory<InvitesViewModel, InvitesViewState> by hiltMavericksViewModelFactory()
 
+    private val _invites = MutableSharedFlow<InvitesContentState>(replay = 1)
+    val invites = _invites.asSharedFlow()
+
+    private var invitesCount = -1
+
     init {
         observeInvites()
     }
@@ -72,8 +90,6 @@ class InvitesViewModel @AssistedInject constructor(
             return@withState
         }
 
-        val shouldCloseInviteView = state.pagedList?.value?.size == 1
-
         viewModelScope.launch {
             try {
                 session.roomService().leaveRoom(roomId)
@@ -81,9 +97,6 @@ class InvitesViewModel @AssistedInject constructor(
                 // Instead, we wait for the room to be rejected
                 // Known bug: if the user is invited again (after rejecting the first invitation), the loading will be displayed instead of the buttons.
                 // If we update the state, the button will be displayed again, so it's not ideal...
-                if (shouldCloseInviteView) {
-                    _viewEvents.post(InvitesViewEvents.Close)
-                }
             } catch (failure: Throwable) {
                 // Notify the user
                 _viewEvents.post(InvitesViewEvents.Failure(failure))
@@ -101,9 +114,7 @@ class InvitesViewModel @AssistedInject constructor(
         }
         // close invites view when navigate to a room from the last one invite
 
-        val shouldCloseInviteView = state.pagedList?.value?.size == 1
-
-        _viewEvents.post(InvitesViewEvents.OpenRoom(action.roomSummary, shouldCloseInviteView))
+        val shouldCloseInviteView = invitesCount == 1
 
         // quick echo
         setState {
@@ -117,6 +128,8 @@ class InvitesViewModel @AssistedInject constructor(
                     }
             )
         }
+
+        _viewEvents.post(InvitesViewEvents.OpenRoom(action.roomSummary, shouldCloseInviteView))
     }
 
     private fun observeInvites() {
@@ -129,8 +142,26 @@ class InvitesViewModel @AssistedInject constructor(
                 sortOrder = RoomSortOrder.ACTIVITY
         )
 
-        setState {
-            copy(pagedList = pagedList)
+        pagedList.asFlow()
+                .map {
+                    if (it.isEmpty()) {
+                        InvitesContentState.Empty(
+                                title = stringProvider.getString(R.string.invites_empty_title),
+                                image = drawableProvider.getDrawable(R.drawable.ic_invites_empty),
+                                message = stringProvider.getString(R.string.invites_empty_message)
+                        )
+                    } else {
+                        invitesCount = it.loadedCount
+                        InvitesContentState.Content(it)
                     }
                 }
+                .catch {
+                    emit(InvitesContentState.Error(it))
+                }
+                .onStart {
+                    emit(InvitesContentState.Loading)
+                }.onEach {
+                    _invites.emit(it)
+                }.launchIn(viewModelScope)
+    }
 }

vector/src/main/java/im/vector/app/features/home/room/list/home/invites/InvitesViewState.kt

@@ -16,13 +16,24 @@
 
 package im.vector.app.features.home.room.list.home.invites
 
-import androidx.lifecycle.LiveData
+import android.graphics.drawable.Drawable
 import androidx.paging.PagedList
 import com.airbnb.mvrx.MavericksState
 import org.matrix.android.sdk.api.session.room.members.ChangeMembershipState
 import org.matrix.android.sdk.api.session.room.model.RoomSummary
 
 data class InvitesViewState(
-        val pagedList: LiveData<PagedList<RoomSummary>>? = null,
         val roomMembershipChanges: Map<String, ChangeMembershipState> = emptyMap(),
 ) : MavericksState
+
+sealed interface InvitesContentState {
+    object Loading : InvitesContentState
+    data class Empty(
+            val title: CharSequence,
+            val image: Drawable?,
+            val message: CharSequence
+    ) : InvitesContentState
+
+    data class Content(val content: PagedList<RoomSummary>) : InvitesContentState
+    data class Error(val throwable: Throwable) : InvitesContentState
+}

vector/src/main/res/drawable/ic_invites_empty.xml

@@ -0,0 +1,14 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="60dp"
+    android:height="60dp"
+    android:viewportWidth="60"
+    android:viewportHeight="60">
+  <path
+      android:pathData="M30,30m-30,0a30,30 0,1 1,60 0a30,30 0,1 1,-60 0"
+      android:fillColor="#E3E8F0"/>
+  <path
+      android:pathData="M25.665,33.544L15.229,23.209L29.236,13.398C29.993,12.868 31.007,12.868 31.764,13.398L45.771,23.209L35.247,33.631L33.851,32.446C31.93,30.816 29.11,30.778 27.145,32.355L25.665,33.544ZM22.439,36.134L14,42.91V27.777L22.439,36.134ZM47,27.777V43.606L38.393,36.301L47,27.777ZM31.177,35.566L43.47,46H16.714L29.733,35.546C30.156,35.208 30.765,35.216 31.177,35.566Z"
+      android:strokeWidth="2"
+      android:fillColor="#737D8C"
+      android:strokeColor="#737D8C"/>
+</vector>

vector/src/main/res/layout/fragment_invites.xml

@@ -20,17 +20,24 @@
 
     </com.google.android.material.appbar.AppBarLayout>
 
-    <androidx.recyclerview.widget.RecyclerView
-        android:id="@+id/invites_recycler"
+    <im.vector.app.core.platform.StateView
+        android:id="@+id/invites_state_view"
         android:layout_width="0dp"
         android:layout_height="0dp"
-        android:fastScrollEnabled="true"
-        android:overScrollMode="always"
-        android:scrollbars="vertical"
-        app:layout_behavior="@string/appbar_scrolling_view_behavior"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/appBarLayout" />
+        app:layout_constraintTop_toBottomOf="@id/appBarLayout">
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/invites_recycler"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:fastScrollEnabled="true"
+            android:overScrollMode="always"
+            android:scrollbars="vertical" />
+
+    </im.vector.app.core.platform.StateView>
+
 
 </androidx.constraintlayout.widget.ConstraintLayout>