Fix crash about several DataStores using the same file

app/src/main/kotlin/io/element/android/x/di/SessionComponent.kt

@@ -33,6 +33,7 @@ interface SessionComponent : NodeFactoriesBindings {
     interface Builder {
         @BindsInstance
         fun client(matrixClient: MatrixClient): Builder
+
         fun build(): SessionComponent
     }
 

changelog.d/2308.bugfix

@@ -0,0 +1 @@
+Fix 'There are multiple DataStores active for the same file' crashes

libraries/di/src/main/kotlin/io/element/android/libraries/di/annotations/SessionCoroutineScope.kt

@@ -0,0 +1,27 @@
+/*
+ * 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.libraries.di.annotations
+
+import javax.inject.Qualifier
+
+/**
+ * Qualifies a [CoroutineScope] object which represents the base coroutine scope to use for an active session.
+ */
+@Retention(AnnotationRetention.RUNTIME)
+@MustBeDocumented
+@Qualifier
+annotation class SessionCoroutineScope

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

@@ -34,12 +34,14 @@ import io.element.android.libraries.matrix.api.sync.SyncService
 import io.element.android.libraries.matrix.api.user.MatrixSearchUserResults
 import io.element.android.libraries.matrix.api.user.MatrixUser
 import io.element.android.libraries.matrix.api.verification.SessionVerificationService
+import kotlinx.coroutines.CoroutineScope
 import java.io.Closeable
 
 interface MatrixClient : Closeable {
     val sessionId: SessionId
     val roomListService: RoomListService
     val mediaLoader: MatrixMediaLoader
+    val sessionCoroutineScope: CoroutineScope
     suspend fun getRoom(roomId: RoomId): MatrixRoom?
     suspend fun findDM(userId: UserId): RoomId?
     suspend fun ignoreUser(userId: UserId): Result<Unit>

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

@@ -102,9 +102,10 @@ class RustMatrixClient(
     private val clock: SystemClock,
 ) : MatrixClient {
     override val sessionId: UserId = UserId(client.userId())
+    override val sessionCoroutineScope = appCoroutineScope.childScope(dispatchers.main, "Session-$sessionId")
+
     private val innerRoomListService = syncService.roomListService()
     private val sessionDispatcher = dispatchers.io.limitedParallelism(64)
-    private val sessionCoroutineScope = appCoroutineScope.childScope(dispatchers.main, "Session-$sessionId")
     private val rustSyncService = RustSyncService(syncService, sessionCoroutineScope)
     private val verificationService = RustSessionVerificationService(rustSyncService, sessionCoroutineScope)
     private val pushersService = RustPushersService(

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

@@ -20,13 +20,15 @@ import com.squareup.anvil.annotations.ContributesTo
 import dagger.Module
 import dagger.Provides
 import io.element.android.libraries.di.SessionScope
+import io.element.android.libraries.di.annotations.SessionCoroutineScope
 import io.element.android.libraries.matrix.api.MatrixClient
 import io.element.android.libraries.matrix.api.encryption.EncryptionService
 import io.element.android.libraries.matrix.api.media.MatrixMediaLoader
 import io.element.android.libraries.matrix.api.notificationsettings.NotificationSettingsService
 import io.element.android.libraries.matrix.api.room.RoomMembershipObserver
 import io.element.android.libraries.matrix.api.roomlist.RoomListService
 import io.element.android.libraries.matrix.api.verification.SessionVerificationService
+import kotlinx.coroutines.CoroutineScope
 
 @Module
 @ContributesTo(SessionScope::class)
@@ -60,4 +62,10 @@ object SessionMatrixModule {
     fun provideMediaLoader(matrixClient: MatrixClient): MatrixMediaLoader {
         return matrixClient.mediaLoader
     }
+
+    @SessionCoroutineScope
+    @Provides
+    fun provideSessionCoroutineScope(matrixClient: MatrixClient): CoroutineScope {
+        return matrixClient.sessionCoroutineScope
+    }
 }

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

@@ -43,10 +43,13 @@ import io.element.android.libraries.matrix.test.roomlist.FakeRoomListService
 import io.element.android.libraries.matrix.test.sync.FakeSyncService
 import io.element.android.libraries.matrix.test.verification.FakeSessionVerificationService
 import io.element.android.tests.testutils.simulateLongTask
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.test.TestScope
 
 class FakeMatrixClient(
     override val sessionId: SessionId = A_SESSION_ID,
+    override val sessionCoroutineScope: CoroutineScope = TestScope(),
     private val userDisplayName: Result<String> = Result.success(A_USER_NAME),
     private val userAvatarUrl: Result<String> = Result.success(AN_AVATAR_URL),
     override val roomListService: RoomListService = FakeRoomListService(),

libraries/preferences/impl/src/main/kotlin/io/element/android/libraries/preferences/impl/store/DefaultSessionPreferencesStore.kt

@@ -29,22 +29,32 @@
 import io.element.android.libraries.di.ApplicationContext
 import io.element.android.libraries.di.SessionScope
 import io.element.android.libraries.di.SingleIn
+import io.element.android.libraries.di.annotations.SessionCoroutineScope
+import io.element.android.libraries.matrix.api.core.SessionId
 import io.element.android.libraries.matrix.api.user.CurrentSessionIdHolder
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.map
+import java.io.File
 import javax.inject.Inject
 
 @ContributesBinding(SessionScope::class)
 @SingleIn(SessionScope::class)
 class DefaultSessionPreferencesStore @Inject constructor(
     @ApplicationContext context: Context,
     currentSessionIdHolder: CurrentSessionIdHolder,
+    @SessionCoroutineScope sessionCoroutineScope: CoroutineScope,
 ) : SessionPreferencesStore {
+    companion object {
+        fun storeFile(context: Context, sessionId: SessionId): File {
+            val hashedUserId = sessionId.value.hash().take(16)
+            return context.preferencesDataStoreFile("session_${hashedUserId}_preferences")
+        }
+    }
     private val sendPublicReadReceiptsKey = booleanPreferencesKey("sendPublicReadReceipts")
-    private val hashedUserId = currentSessionIdHolder.current.value.hash().take(16)
 
-    private val dataStoreFile = context.preferencesDataStoreFile("session_${hashedUserId}_preferences")
-    private val store = PreferenceDataStoreFactory.create { dataStoreFile }
+    private val dataStoreFile = storeFile(context, currentSessionIdHolder.current)
+    private val store = PreferenceDataStoreFactory.create(scope = sessionCoroutineScope) { dataStoreFile }
 
     override suspend fun setSendPublicReadReceipts(enabled: Boolean) = update(sendPublicReadReceiptsKey, enabled)
     override fun isSendPublicReadReceiptsEnabled(): Flow<Boolean> = get(sendPublicReadReceiptsKey, true)