Message queuing : branches the enable sending queue mechanism.

appnav/src/main/kotlin/io/element/android/appnav/LoggedInFlowNode.kt

@@ -40,6 +40,7 @@ import dagger.assisted.AssistedInject
 import im.vector.app.features.analytics.plan.JoinedRoom
 import io.element.android.anvilannotations.ContributesNode
 import io.element.android.appnav.loggedin.LoggedInNode
+import io.element.android.appnav.loggedin.SendingQueue
 import io.element.android.appnav.room.RoomFlowNode
 import io.element.android.appnav.room.RoomNavigationTarget
 import io.element.android.appnav.room.joined.JoinedRoomLoadedFlowNode
@@ -99,6 +100,7 @@ class LoggedInFlowNode @AssistedInject constructor(
     private val ftueService: FtueService,
     private val roomDirectoryEntryPoint: RoomDirectoryEntryPoint,
     private val matrixClient: MatrixClient,
+    private val sendingQueue: SendingQueue,
     snackbarDispatcher: SnackbarDispatcher,
 ) : BaseFlowNode<LoggedInFlowNode.NavTarget>(
     backstack = BackStack(
@@ -154,6 +156,11 @@ class LoggedInFlowNode @AssistedInject constructor(
             }
         )
         observeSyncStateAndNetworkStatus()
+        setupSendingQueue()
+    }
+
+    private fun setupSendingQueue() {
+        sendingQueue.setupWith(lifecycleScope)
     }
 
     @OptIn(FlowPreview::class)

appnav/src/main/kotlin/io/element/android/appnav/loggedin/SendingQueue.kt

@@ -0,0 +1,62 @@
+/*
+ * 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.appnav.loggedin
+
+import io.element.android.features.networkmonitor.api.NetworkMonitor
+import io.element.android.features.networkmonitor.api.NetworkStatus
+import io.element.android.libraries.di.SessionScope
+import io.element.android.libraries.di.SingleIn
+import io.element.android.libraries.matrix.api.MatrixClient
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
+import timber.log.Timber
+import java.util.concurrent.atomic.AtomicInteger
+import javax.inject.Inject
+
+private const val MIN_RETRY_DELAY = 250L
+private const val MAX_RETRY_DELAY = 5000L
+
+@SingleIn(SessionScope::class)
+class SendingQueue @Inject constructor(
+    private val matrixClient: MatrixClient,
+    private val networkMonitor: NetworkMonitor,
+) {
+
+    private val retryCount = AtomicInteger(0)
+
+    fun setupWith(coroutineScope: CoroutineScope) {
+        combine(
+            networkMonitor.connectivity,
+            matrixClient.sendingQueueStatus(),
+        ) { networkStatus, isSendingQueueEnabled ->
+            Pair(networkStatus, isSendingQueueEnabled)
+        }.onEach { (networkStatus, isSendingQueueEnabled) ->
+            Timber.d("Network status: $networkStatus, isSendingQueueEnabled: $isSendingQueueEnabled")
+            if (networkStatus == NetworkStatus.Online && !isSendingQueueEnabled) {
+                val retryDelay = (MIN_RETRY_DELAY * retryCount.incrementAndGet()).coerceIn(MIN_RETRY_DELAY, MAX_RETRY_DELAY)
+                Timber.d("Retry enabling sending queue in $retryDelay ms")
+                delay(retryDelay)
+            } else {
+                retryCount.set(0)
+            }
+            matrixClient.setSendingQueueEnabled(enabled = networkStatus == NetworkStatus.Online)
+        }.launchIn(coroutineScope)
+    }
+}

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/MatrixClient.kt

@@ -114,7 +114,7 @@ interface MatrixClient : Closeable {
      * so it's required to manually re-enable it as soon as
      * connectivity is back on the device.
      */
-    suspend fun enableSendingQueue(enable: Boolean)
+    suspend fun setSendingQueueEnabled(enabled: Boolean)
 
     /**
      * Returns the current status of the sending queue as a [StateFlow].

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/RustMatrixClient.kt

@@ -552,8 +552,9 @@ class RustMatrixClient(
         }.distinctUntilChanged()
     }
 
-    override suspend fun enableSendingQueue(enable: Boolean) = withContext(sessionDispatcher) {
+    override suspend fun setSendingQueueEnabled(enabled: Boolean) = withContext(sessionDispatcher) {
-        client.enableSendingQueue(enable)
+        Timber.i("setSendingQueueEnabled($enabled)")
+        client.enableSendingQueue(enabled)
     }
 
     override fun sendingQueueStatus(): StateFlow<Boolean> = mxCallbackFlow {

libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/FakeMatrixClient.kt

@@ -304,7 +304,7 @@ class FakeMatrixClient(
         // no-op
     }
 
-    override suspend fun enableSendingQueue(enable: Boolean) = enableSendingQueueLambda(enable)
+    override suspend fun setSendingQueueEnabled(enable: Boolean) = enableSendingQueueLambda(enable)
 
     var sendingQueueStatusFlow = MutableStateFlow(true)
     override fun sendingQueueStatus(): StateFlow<Boolean> = sendingQueueStatusFlow