Merge pull request #3531 from vector-im/feature/fga/auto_accept_invite

Feature/fga/auto accept invite

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/RoomService.kt

@@ -125,6 +125,12 @@ interface RoomService {
      */
     suspend fun deleteRoomAlias(roomAlias: String)
 
+    /**
+     * Return the current local changes membership for the given room.
+     * see [getChangeMembershipsLive] for more details.
+     */
+    fun getChangeMemberships(roomIdOrAlias: String): ChangeMembershipState
+
     /**
      * Return a live data of all local changes membership that happened since the session has been opened.
      * It allows you to track this in your client to known what is currently being processed by the SDK.

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/DefaultRoomService.kt

@@ -134,6 +134,10 @@ internal class DefaultRoomService @Inject constructor(
         deleteRoomAliasTask.execute(DeleteRoomAliasTask.Params(roomAlias))
     }
 
+    override fun getChangeMemberships(roomIdOrAlias: String): ChangeMembershipState {
+        return roomChangeMembershipStateDataSource.getState(roomIdOrAlias)
+    }
+
     override fun getChangeMembershipsLive(): LiveData<Map<String, ChangeMembershipState>> {
         return roomChangeMembershipStateDataSource.getLiveStates()
     }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/membership/RoomChangeMembershipStateDataSource.kt

@@ -21,6 +21,7 @@ import androidx.lifecycle.MutableLiveData
 import org.matrix.android.sdk.api.session.room.members.ChangeMembershipState
 import org.matrix.android.sdk.api.session.room.model.Membership
 import org.matrix.android.sdk.internal.session.SessionScope
+import java.util.concurrent.ConcurrentHashMap
 import javax.inject.Inject
 
 /**
@@ -30,7 +31,7 @@ import javax.inject.Inject
 internal class RoomChangeMembershipStateDataSource @Inject constructor() {
 
     private val mutableLiveStates = MutableLiveData<Map<String, ChangeMembershipState>>(emptyMap())
-    private val states = HashMap<String, ChangeMembershipState>()
+    private val states = ConcurrentHashMap<String, ChangeMembershipState>()
 
     /**
      * This will update local states to be synced with the server.

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/membership/joining/JoinRoomTask.kt

@@ -54,6 +54,10 @@ internal class DefaultJoinRoomTask @Inject constructor(
 ) : JoinRoomTask {
 
     override suspend fun execute(params: JoinRoomTask.Params) {
+        val currentState = roomChangeMembershipStateDataSource.getState(params.roomIdOrAlias)
+        if (currentState.isInProgress() || currentState == ChangeMembershipState.Joined) {
+            return
+        }
         roomChangeMembershipStateDataSource.updateState(params.roomIdOrAlias, ChangeMembershipState.Joining)
         val joinRoomResponse = try {
             executeRequest(globalErrorReceiver) {

newsfragment/3531.feature

@@ -0,0 +1 @@
+Introduces AutoAcceptInvites which can be enabled at compile time.

vector/src/main/java/im/vector/app/AppStateHandler.kt

@@ -49,13 +49,12 @@ fun RoomGroupingMethod.group() = (this as? RoomGroupingMethod.ByLegacyGroup)?.gr
 // TODO Keep this class for now, will maybe be used fro Space
 @Singleton
 class AppStateHandler @Inject constructor(
-        sessionDataSource: ActiveSessionDataSource,
+        private val sessionDataSource: ActiveSessionDataSource,
         private val uiStateRepository: UiStateRepository,
         private val activeSessionHolder: ActiveSessionHolder
 ) : LifecycleObserver {
 
     private val compositeDisposable = CompositeDisposable()
-
     private val selectedSpaceDataSource = BehaviorDataSource<Option<RoomGroupingMethod>>(Option.empty())
 
     val selectedRoomGroupingObservable = selectedSpaceDataSource.observe()
@@ -92,11 +91,11 @@ class AppStateHandler @Inject constructor(
         }
     }
 
-    init {
+    private fun observeActiveSession() {
         sessionDataSource.observe()
                 .distinctUntilChanged()
                 .subscribe {
-                    // sessionDataSource could already return a session while acitveSession holder still returns null
+                    // sessionDataSource could already return a session while activeSession holder still returns null
                     it.orNull()?.let { session ->
                         if (uiStateRepository.isGroupingMethodSpace(session.sessionId)) {
                             setCurrentSpace(uiStateRepository.getSelectedSpace(session.sessionId), session)
@@ -119,6 +118,7 @@ class AppStateHandler @Inject constructor(
 
     @OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
     fun entersForeground() {
+        observeActiveSession()
     }
 
     @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)

vector/src/main/java/im/vector/app/VectorApplication.kt

@@ -47,6 +47,7 @@ import im.vector.app.core.rx.RxConfig
 import im.vector.app.features.call.webrtc.WebRtcCallManager
 import im.vector.app.features.configuration.VectorConfiguration
 import im.vector.app.features.disclaimer.doNotShowDisclaimerDialog
+import im.vector.app.features.invite.InvitesAcceptor
 import im.vector.app.features.lifecycle.VectorActivityLifecycleCallbacks
 import im.vector.app.features.notifications.NotificationDrawerManager
 import im.vector.app.features.notifications.NotificationUtils
@@ -95,6 +96,7 @@ class VectorApplication :
     @Inject lateinit var popupAlertManager: PopupAlertManager
     @Inject lateinit var pinLocker: PinLocker
     @Inject lateinit var callManager: WebRtcCallManager
+    @Inject lateinit var invitesAcceptor: InvitesAcceptor
 
     lateinit var vectorComponent: VectorComponent
 
@@ -116,6 +118,7 @@ class VectorApplication :
         appContext = this
         vectorComponent = DaggerVectorComponent.factory().create(this)
         vectorComponent.inject(this)
+        invitesAcceptor.initialize()
         vectorUncaughtExceptionHandler.activate(this)
         rxConfig.setupRxPlugin()
 

vector/src/main/java/im/vector/app/core/di/ScreenComponent.kt

@@ -50,6 +50,7 @@ import im.vector.app.features.home.room.detail.widget.RoomWidgetsBottomSheet
 import im.vector.app.features.home.room.filtered.FilteredRoomsActivity
 import im.vector.app.features.home.room.list.RoomListModule
 import im.vector.app.features.home.room.list.actions.RoomListQuickActionsBottomSheet
+import im.vector.app.features.invite.AutoAcceptInvites
 import im.vector.app.features.invite.InviteUsersToRoomActivity
 import im.vector.app.features.invite.VectorInviteView
 import im.vector.app.features.link.LinkHandlerActivity
@@ -122,6 +123,7 @@ interface ScreenComponent {
     fun errorFormatter(): ErrorFormatter
     fun uiStateRepository(): UiStateRepository
     fun unrecognizedCertificateDialog(): UnrecognizedCertificateDialog
+    fun autoAcceptInvites(): AutoAcceptInvites
 
     /* ==========================================================================================
      * Activities

vector/src/main/java/im/vector/app/core/di/VectorComponent.kt

@@ -42,6 +42,7 @@ import im.vector.app.features.home.room.detail.timeline.helper.MatrixItemColorPr
 import im.vector.app.features.home.room.detail.timeline.helper.RoomSummariesHolder
 import im.vector.app.features.html.EventHtmlRenderer
 import im.vector.app.features.html.VectorHtmlCompressor
+import im.vector.app.features.invite.AutoAcceptInvites
 import im.vector.app.features.login.ReAuthHelper
 import im.vector.app.features.navigation.Navigator
 import im.vector.app.features.notifications.NotifiableEventResolver
@@ -160,6 +161,8 @@ interface VectorComponent {
 
     fun pinLocker(): PinLocker
 
+    fun autoAcceptInvites(): AutoAcceptInvites
+
     fun webRtcCallManager(): WebRtcCallManager
 
     fun roomSummaryHolder(): RoomSummariesHolder

vector/src/main/java/im/vector/app/core/di/VectorModule.kt

@@ -25,6 +25,8 @@ import dagger.Module
 import dagger.Provides
 import im.vector.app.core.error.DefaultErrorFormatter
 import im.vector.app.core.error.ErrorFormatter
+import im.vector.app.features.invite.AutoAcceptInvites
+import im.vector.app.features.invite.CompileTimeAutoAcceptInvites
 import im.vector.app.features.navigation.DefaultNavigator
 import im.vector.app.features.navigation.Navigator
 import im.vector.app.features.pin.PinCodeStore
@@ -105,4 +107,7 @@ abstract class VectorModule {
 
     @Binds
     abstract fun bindPinCodeStore(store: SharedPrefPinCodeStore): PinCodeStore
+
+    @Binds
+    abstract fun bindAutoAcceptInvites(autoAcceptInvites: CompileTimeAutoAcceptInvites): AutoAcceptInvites
 }

vector/src/main/java/im/vector/app/features/call/lookup/CallUserMapper.kt

@@ -67,10 +67,6 @@ class CallUserMapper(private val session: Session, private val protocolsChecker:
                 // will make sure we know where how to map calls and also allow us know not to display
                 // it in the future.
                 invitedRoom.markVirtual(nativeRoomId)
-                // also auto-join the virtual room if we have a matching native room
-                // (possibly we should only join if we've also joined the native room, then we'd also have
-                // to make sure we joined virtual rooms on joining a native one)
-                session.joinRoom(invitedRoomId)
             }
         }
     }

vector/src/main/java/im/vector/app/features/home/HomeDetailViewModel.kt

@@ -31,6 +31,8 @@ import im.vector.app.features.call.dialpad.DialPadLookup
 import im.vector.app.features.call.lookup.CallProtocolsChecker
 import im.vector.app.features.call.webrtc.WebRtcCallManager
 import im.vector.app.features.createdirect.DirectRoomHelper
+import im.vector.app.features.invite.AutoAcceptInvites
+import im.vector.app.features.invite.showInvites
 import im.vector.app.features.ui.UiStateRepository
 import io.reactivex.schedulers.Schedulers
 import kotlinx.coroutines.Dispatchers
@@ -56,7 +58,8 @@ class HomeDetailViewModel @AssistedInject constructor(@Assisted initialState: Ho
                                                       private val uiStateRepository: UiStateRepository,
                                                       private val callManager: WebRtcCallManager,
                                                       private val directRoomHelper: DirectRoomHelper,
-                                                      private val appStateHandler: AppStateHandler)
+                                                      private val appStateHandler: AppStateHandler,
+private val autoAcceptInvites: AutoAcceptInvites)
     : VectorViewModel<HomeDetailViewState, HomeDetailAction, HomeDetailViewEvents>(initialState),
         CallProtocolsChecker.Listener {
 
@@ -204,7 +207,10 @@ class HomeDetailViewModel @AssistedInject constructor(@Assisted initialState: Ho
                         }
                         is RoomGroupingMethod.BySpace       -> {
                             val activeSpaceRoomId = groupingMethod.spaceSummary?.roomId
-                            val dmInvites = session.getRoomSummaries(
+                            var dmInvites = 0
+                            var roomsInvite = 0
+                            if (autoAcceptInvites.showInvites()) {
+                                dmInvites = session.getRoomSummaries(
                                         roomSummaryQueryParams {
                                             memberships = listOf(Membership.INVITE)
                                             roomCategoryFilter = RoomCategoryFilter.ONLY_DM
@@ -212,13 +218,14 @@ class HomeDetailViewModel @AssistedInject constructor(@Assisted initialState: Ho
                                         }
                                 ).size
 
-                            val roomsInvite = session.getRoomSummaries(
+                                roomsInvite = session.getRoomSummaries(
                                         roomSummaryQueryParams {
                                             memberships = listOf(Membership.INVITE)
                                             roomCategoryFilter = RoomCategoryFilter.ONLY_ROOMS
                                             activeSpaceFilter = ActiveSpaceFilter.ActiveSpace(groupingMethod.spaceSummary?.roomId)
                                         }
                                 ).size
+                            }
 
                             val dmRooms = session.getNotificationCountForRooms(
                                     roomSummaryQueryParams {

vector/src/main/java/im/vector/app/features/home/UnreadMessagesSharedViewModel.kt

@@ -29,6 +29,7 @@ import im.vector.app.RoomGroupingMethod
 import im.vector.app.core.platform.EmptyAction
 import im.vector.app.core.platform.EmptyViewEvents
 import im.vector.app.core.platform.VectorViewModel
+import im.vector.app.features.invite.AutoAcceptInvites
 import im.vector.app.features.settings.VectorPreferences
 import io.reactivex.Observable
 import io.reactivex.schedulers.Schedulers
@@ -54,7 +55,8 @@ data class CountInfo(
 class UnreadMessagesSharedViewModel @AssistedInject constructor(@Assisted initialState: UnreadMessagesState,
                                                                 session: Session,
                                                                 private val vectorPreferences: VectorPreferences,
-                                                                appStateHandler: AppStateHandler)
+                                                                appStateHandler: AppStateHandler,
+                                                                private val autoAcceptInvites: AutoAcceptInvites)
     : VectorViewModel<UnreadMessagesState, EmptyAction, EmptyViewEvents>(initialState) {
 
     @AssistedFactory
@@ -92,12 +94,17 @@ class UnreadMessagesSharedViewModel @AssistedInject constructor(@Assisted initia
                                 this.activeSpaceFilter = ActiveSpaceFilter.ActiveSpace(null)
                             }
                     )
-                    val invites = session.getRoomSummaries(
+                    val invites = if (autoAcceptInvites.hideInvites) {
+                        0
+                    } else {
+                        session.getRoomSummaries(
                                 roomSummaryQueryParams {
                                     this.memberships = listOf(Membership.INVITE)
                                     this.activeSpaceFilter = ActiveSpaceFilter.ActiveSpace(null)
                                 }
                         ).size
+                    }
+
                     copy(
                             homeSpaceUnread = RoomAggregateNotificationCount(
                                     counts.notificationCount + invites,
@@ -129,10 +136,13 @@ class UnreadMessagesSharedViewModel @AssistedInject constructor(@Assisted initia
                         is RoomGroupingMethod.BySpace       -> {
                             val selectedSpace = appStateHandler.safeActiveSpaceId()
 
-                            val inviteCount = session.getRoomSummaries(
+                            val inviteCount = if (autoAcceptInvites.hideInvites) {
+                                0
+                            } else {
+                                session.getRoomSummaries(
                                         roomSummaryQueryParams { this.memberships = listOf(Membership.INVITE) }
                                 ).size
-
+                            }
                             val totalCount = session.getNotificationCountForRooms(
                                     roomSummaryQueryParams {
                                         this.memberships = listOf(Membership.JOIN)

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

@@ -22,6 +22,8 @@ import im.vector.app.R
 import im.vector.app.RoomGroupingMethod
 import im.vector.app.core.resources.StringProvider
 import im.vector.app.features.home.RoomListDisplayMode
+import im.vector.app.features.invite.AutoAcceptInvites
+import im.vector.app.features.invite.showInvites
 import io.reactivex.disposables.Disposable
 import io.reactivex.schedulers.Schedulers
 import kotlinx.coroutines.CoroutineScope
@@ -38,6 +40,7 @@ class GroupRoomListSectionBuilder(
         val stringProvider: StringProvider,
         val viewModelScope: CoroutineScope,
         val appStateHandler: AppStateHandler,
+        private val autoAcceptInvites: AutoAcceptInvites,
         val onDisposable: (Disposable) -> Unit,
         val onUdpatable: (UpdatableLivePageResult) -> Unit
 ) : RoomListSectionBuilder {
@@ -73,6 +76,7 @@ class GroupRoomListSectionBuilder(
                 )
             }
             RoomListDisplayMode.NOTIFICATIONS -> {
+                if (autoAcceptInvites.showInvites()) {
                     addSection(
                             sections,
                             activeGroupAwareQueries,
@@ -83,7 +87,7 @@ class GroupRoomListSectionBuilder(
                         it.roomCategoryFilter = RoomCategoryFilter.ALL
                         it.activeGroupId = actualGroupId
                     }
-
+                }
                 addSection(
                         sections,
                         activeGroupAwareQueries,
@@ -115,6 +119,7 @@ class GroupRoomListSectionBuilder(
     private fun buildRoomsSections(sections: MutableList<RoomsSection>,
                                    activeSpaceAwareQueries: MutableList<UpdatableLivePageResult>,
                                    actualGroupId: String?) {
+        if (autoAcceptInvites.showInvites()) {
             addSection(
                     sections,
                     activeSpaceAwareQueries,
@@ -125,6 +130,7 @@ class GroupRoomListSectionBuilder(
                 it.roomCategoryFilter = RoomCategoryFilter.ONLY_ROOMS
                 it.activeGroupId = actualGroupId
             }
+        }
 
         addSection(
                 sections,
@@ -180,6 +186,7 @@ class GroupRoomListSectionBuilder(
             activeSpaceAwareQueries: MutableList<UpdatableLivePageResult>,
             actualGroupId: String?
     ) {
+        if (autoAcceptInvites.showInvites()) {
             addSection(sections,
                     activeSpaceAwareQueries,
                     R.string.invitations_header,
@@ -189,6 +196,7 @@ class GroupRoomListSectionBuilder(
                 it.roomCategoryFilter = RoomCategoryFilter.ONLY_DM
                 it.activeGroupId = actualGroupId
             }
+        }
 
         addSection(
                 sections,

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

@@ -30,6 +30,7 @@ import im.vector.app.RoomGroupingMethod
 import im.vector.app.core.extensions.exhaustive
 import im.vector.app.core.platform.VectorViewModel
 import im.vector.app.core.resources.StringProvider
+import im.vector.app.features.invite.AutoAcceptInvites
 import im.vector.app.features.settings.VectorPreferences
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -49,7 +50,8 @@ class RoomListViewModel @Inject constructor(
         private val session: Session,
         private val stringProvider: StringProvider,
         private val appStateHandler: AppStateHandler,
-        private val vectorPreferences: VectorPreferences
+        private val vectorPreferences: VectorPreferences,
+        private val autoAcceptInvites: AutoAcceptInvites
 ) : VectorViewModel<RoomListViewState, RoomListAction, RoomListViewEvents>(initialState) {
 
     interface Factory {
@@ -126,6 +128,7 @@ class RoomListViewModel @Inject constructor(
                     appStateHandler,
                     viewModelScope,
                     suggestedRoomJoiningState,
+                    autoAcceptInvites,
                     {
                         it.disposeOnClear()
                     },
@@ -140,6 +143,7 @@ class RoomListViewModel @Inject constructor(
                     stringProvider,
                     viewModelScope,
                     appStateHandler,
+                    autoAcceptInvites,
                     {
                         it.disposeOnClear()
                     },

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

@@ -18,6 +18,7 @@ package im.vector.app.features.home.room.list
 
 import im.vector.app.AppStateHandler
 import im.vector.app.core.resources.StringProvider
+import im.vector.app.features.invite.AutoAcceptInvites
 import im.vector.app.features.settings.VectorPreferences
 import org.matrix.android.sdk.api.session.Session
 import javax.inject.Inject
@@ -26,16 +27,18 @@ import javax.inject.Provider
 class RoomListViewModelFactory @Inject constructor(private val session: Provider<Session>,
                                                    private val appStateHandler: AppStateHandler,
                                                    private val stringProvider: StringProvider,
-                                                   private val vectorPreferences: VectorPreferences)
+                                                   private val vectorPreferences: VectorPreferences,
+                                                   private val autoAcceptInvites: AutoAcceptInvites)
     : RoomListViewModel.Factory {
 
     override fun create(initialState: RoomListViewState): RoomListViewModel {
         return RoomListViewModel(
-                initialState,
+                initialState = initialState,
-                session.get(),
+                session = session.get(),
-                stringProvider,
+                stringProvider = stringProvider,
-                appStateHandler,
+                appStateHandler = appStateHandler,
-                vectorPreferences
+                vectorPreferences = vectorPreferences,
+                autoAcceptInvites = autoAcceptInvites
         )
     }
 }

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

@@ -26,6 +26,8 @@ import im.vector.app.AppStateHandler
 import im.vector.app.R
 import im.vector.app.core.resources.StringProvider
 import im.vector.app.features.home.RoomListDisplayMode
+import im.vector.app.features.invite.AutoAcceptInvites
+import im.vector.app.features.invite.showInvites
 import im.vector.app.space
 import io.reactivex.Observable
 import io.reactivex.disposables.Disposable
@@ -50,6 +52,7 @@ class SpaceRoomListSectionBuilder(
         val appStateHandler: AppStateHandler,
         val viewModelScope: CoroutineScope,
         private val suggestedRoomJoiningState: LiveData<Map<String, Async<Unit>>>,
+        private val autoAcceptInvites: AutoAcceptInvites,
         val onDisposable: (Disposable) -> Unit,
         val onUdpatable: (UpdatableLivePageResult) -> Unit,
         val onlyOrphansInHome: Boolean = false
@@ -88,6 +91,7 @@ class SpaceRoomListSectionBuilder(
                 )
             }
             RoomListDisplayMode.NOTIFICATIONS -> {
+                if (autoAcceptInvites.showInvites()) {
                     addSection(
                             sections = sections,
                             activeSpaceUpdaters = activeSpaceAwareQueries,
@@ -103,6 +107,7 @@ class SpaceRoomListSectionBuilder(
                         it.memberships = listOf(Membership.INVITE)
                         it.roomCategoryFilter = RoomCategoryFilter.ALL
                     }
+                }
 
                 addSection(
                         sections = sections,
@@ -136,6 +141,7 @@ class SpaceRoomListSectionBuilder(
     }
 
     private fun buildRoomsSections(sections: MutableList<RoomsSection>, activeSpaceAwareQueries: MutableList<RoomListViewModel.ActiveSpaceQueryUpdater>) {
+        if (autoAcceptInvites.showInvites()) {
             addSection(
                     sections = sections,
                     activeSpaceUpdaters = activeSpaceAwareQueries,
@@ -147,6 +153,7 @@ class SpaceRoomListSectionBuilder(
                 it.memberships = listOf(Membership.INVITE)
                 it.roomCategoryFilter = RoomCategoryFilter.ONLY_ROOMS
             }
+        }
 
         addSection(
                 sections,
@@ -253,6 +260,7 @@ class SpaceRoomListSectionBuilder(
     }
 
     private fun buildDmSections(sections: MutableList<RoomsSection>, activeSpaceAwareQueries: MutableList<RoomListViewModel.ActiveSpaceQueryUpdater>) {
+        if (autoAcceptInvites.showInvites()) {
             addSection(sections = sections,
                     activeSpaceUpdaters = activeSpaceAwareQueries,
                     nameRes = R.string.invitations_header,
@@ -263,6 +271,7 @@ class SpaceRoomListSectionBuilder(
                 it.memberships = listOf(Membership.INVITE)
                 it.roomCategoryFilter = RoomCategoryFilter.ONLY_DM
             }
+        }
 
         addSection(sections,
                 activeSpaceAwareQueries,

vector/src/main/java/im/vector/app/features/invite/AutoAcceptInvites.kt

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2021 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 im.vector.app.features.invite
+
+import javax.inject.Inject
+
+/**
+ * This interface defines 2 flags so you can handle auto accept invites.
+ * At the moment we only have [CompileTimeAutoAcceptInvites] implementation.
+ */
+interface AutoAcceptInvites {
+    /**
+     * Enable auto-accept invites. It means, as soon as you got an invite from the sync, it will try to join it.
+     */
+    val isEnabled: Boolean
+
+    /**
+     * Hide invites from the UI (from notifications, notification count and room list). By default invites are hidden when [isEnabled] is true
+     */
+    val hideInvites: Boolean
+        get() = isEnabled
+}
+
+fun AutoAcceptInvites.showInvites() = !hideInvites
+
+/**
+ * Simple compile time implementation of AutoAcceptInvites flags.
+ */
+class CompileTimeAutoAcceptInvites @Inject constructor() : AutoAcceptInvites {
+    override val isEnabled = false
+}

vector/src/main/java/im/vector/app/features/invite/InvitesAcceptor.kt

@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2021 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 im.vector.app.features.invite
+
+import im.vector.app.ActiveSessionDataSource
+import im.vector.app.features.session.coroutineScope
+import io.reactivex.Observable
+import io.reactivex.disposables.Disposable
+import kotlinx.coroutines.async
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.sync.Semaphore
+import kotlinx.coroutines.sync.withPermit
+import org.matrix.android.sdk.api.extensions.orFalse
+import org.matrix.android.sdk.api.failure.Failure
+import org.matrix.android.sdk.api.session.Session
+import org.matrix.android.sdk.api.session.room.Room
+import org.matrix.android.sdk.api.session.room.members.ChangeMembershipState
+import org.matrix.android.sdk.api.session.room.model.Membership
+import org.matrix.android.sdk.api.session.room.roomSummaryQueryParams
+import org.matrix.android.sdk.rx.rx
+import timber.log.Timber
+import java.util.concurrent.TimeUnit
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * This class is responsible for auto accepting invites.
+ * It's listening to invites and membershipChanges so it can retry automatically if needed.
+ * This mechanism will be on only if AutoAcceptInvites.isEnabled is true.
+ */
+@Singleton
+class InvitesAcceptor @Inject constructor(
+        private val sessionDataSource: ActiveSessionDataSource,
+        private val autoAcceptInvites: AutoAcceptInvites
+) : Session.Listener {
+
+    private lateinit var activeSessionDisposable: Disposable
+    private val shouldRejectRoomIds = mutableSetOf<String>()
+    private val invitedRoomDisposables = HashMap<String, Disposable>()
+    private val semaphore = Semaphore(1)
+
+    fun initialize() {
+        observeActiveSession()
+    }
+
+    private fun observeActiveSession() {
+        activeSessionDisposable = sessionDataSource.observe()
+                .distinctUntilChanged()
+                .subscribe {
+                    it.orNull()?.let { session ->
+                        onSessionActive(session)
+                    }
+                }
+    }
+
+    private fun onSessionActive(session: Session) {
+        if (!autoAcceptInvites.isEnabled) {
+            return
+        }
+        if (invitedRoomDisposables.containsKey(session.sessionId)) {
+            return
+        }
+        session.addListener(this)
+        val roomQueryParams = roomSummaryQueryParams {
+            this.memberships = listOf(Membership.INVITE)
+        }
+        val rxSession = session.rx()
+        Observable
+                .combineLatest(
+                        rxSession.liveRoomSummaries(roomQueryParams),
+                        rxSession.liveRoomChangeMembershipState().debounce(1, TimeUnit.SECONDS),
+                        { invitedRooms, _ -> invitedRooms.map { it.roomId } }
+                )
+                .filter { it.isNotEmpty() }
+                .subscribe { invitedRoomIds ->
+                    session.coroutineScope.launch {
+                        semaphore.withPermit {
+                            Timber.v("Invited roomIds: $invitedRoomIds")
+                            for (roomId in invitedRoomIds) {
+                                async { session.joinRoomSafely(roomId) }.start()
+                            }
+                        }
+                    }
+                }
+                .also {
+                    invitedRoomDisposables[session.sessionId] = it
+                }
+    }
+
+    private suspend fun Session.joinRoomSafely(roomId: String) {
+        if (shouldRejectRoomIds.contains(roomId)) {
+            getRoom(roomId)?.rejectInviteSafely()
+            return
+        }
+        val roomMembershipChanged = getChangeMemberships(roomId)
+        if (roomMembershipChanged != ChangeMembershipState.Joined && !roomMembershipChanged.isInProgress()) {
+            try {
+                Timber.v("Try auto join room: $roomId")
+                joinRoom(roomId)
+            } catch (failure: Throwable) {
+                Timber.v("Failed auto join room: $roomId")
+                // if we got 404 on invites, the inviting user have left or the hs is off.
+                if (failure is Failure.ServerError && failure.httpCode == 404) {
+                    val room = getRoom(roomId) ?: return
+                    val inviterId = room.roomSummary()?.inviterId
+                    // if the inviting user is on the same HS, there can only be one cause: they left, so we try to reject the invite.
+                    if (inviterId?.endsWith(sessionParams.credentials.homeServer.orEmpty()).orFalse()) {
+                        shouldRejectRoomIds.add(roomId)
+                        room.rejectInviteSafely()
+                    }
+                }
+            }
+        }
+    }
+
+    private suspend fun Room.rejectInviteSafely() {
+        try {
+            leave(null)
+            shouldRejectRoomIds.remove(roomId)
+        } catch (failure: Throwable) {
+            Timber.v("Fail rejecting invite for room: $roomId")
+        }
+    }
+
+    override fun onSessionStopped(session: Session) {
+        session.removeListener(this)
+        invitedRoomDisposables.remove(session.sessionId)?.dispose()
+    }
+}

vector/src/main/java/im/vector/app/features/notifications/NotificationDrawerManager.kt

@@ -27,6 +27,7 @@ import im.vector.app.BuildConfig
 import im.vector.app.R
 import im.vector.app.core.resources.StringProvider
 import im.vector.app.core.utils.FirstThrottler
+import im.vector.app.features.invite.AutoAcceptInvites
 import im.vector.app.features.settings.VectorPreferences
 import me.gujun.android.span.span
 import org.matrix.android.sdk.api.session.Session
@@ -50,7 +51,8 @@ class NotificationDrawerManager @Inject constructor(private val context: Context
                                                     private val activeSessionDataSource: ActiveSessionDataSource,
                                                     private val iconLoader: IconLoader,
                                                     private val bitmapLoader: BitmapLoader,
-                                                    private val outdatedDetector: OutdatedEventDetector?) {
+                                                    private val outdatedDetector: OutdatedEventDetector?,
+                                                    private val autoAcceptInvites: AutoAcceptInvites) {
 
     private val handlerThread: HandlerThread = HandlerThread("NotificationDrawerManager", Thread.MIN_PRIORITY)
     private var backgroundHandler: Handler
@@ -253,7 +255,14 @@ class NotificationDrawerManager @Inject constructor(private val context: Context
                             roomEvents.add(event)
                         }
                     }
-                    is InviteNotifiableEvent  -> invitationEvents.add(event)
+                    is InviteNotifiableEvent  -> {
+                        if (autoAcceptInvites.hideInvites) {
+                            // Forget this event
+                           eventIterator.remove()
+                        } else {
+                            invitationEvents.add(event)
+                        }
+                    }
                     is SimpleNotifiableEvent  -> simpleEvents.add(event)
                     else                      -> Timber.w("Type not handled")
                 }

vector/src/main/java/im/vector/app/features/spaces/SpacesListViewModel.kt

@@ -28,6 +28,7 @@ import dagger.assisted.AssistedInject
 import im.vector.app.AppStateHandler
 import im.vector.app.RoomGroupingMethod
 import im.vector.app.core.platform.VectorViewModel
+import im.vector.app.features.invite.AutoAcceptInvites
 import im.vector.app.features.session.coroutineScope
 import im.vector.app.features.settings.VectorPreferences
 import im.vector.app.group
@@ -61,7 +62,8 @@ import java.util.concurrent.TimeUnit
 class SpacesListViewModel @AssistedInject constructor(@Assisted initialState: SpaceListViewState,
                                                       private val appStateHandler: AppStateHandler,
                                                       private val session: Session,
-                                                      private val vectorPreferences: VectorPreferences
+                                                      private val vectorPreferences: VectorPreferences,
+                                                      private val autoAcceptInvites: AutoAcceptInvites
 ) : VectorViewModel<SpaceListViewState, SpaceListAction, SpaceListViewEvents>(initialState) {
 
     @AssistedFactory
@@ -126,10 +128,13 @@ class SpacesListViewModel @AssistedInject constructor(@Assisted initialState: Sp
                 .throttleFirst(300, TimeUnit.MILLISECONDS)
                 .observeOn(Schedulers.computation())
                 .subscribe {
-                    val inviteCount = session.getRoomSummaries(
+                    val inviteCount = if (autoAcceptInvites.hideInvites) {
+                        0
+                    } else {
+                        session.getRoomSummaries(
                                 roomSummaryQueryParams { this.memberships = listOf(Membership.INVITE) }
                         ).size
-
+                    }
                     val totalCount = session.getNotificationCountForRooms(
                             roomSummaryQueryParams {
                                 this.memberships = listOf(Membership.JOIN)