When logging out from Pin code screen, logout from all the sessions.

features/lockscreen/impl/src/main/kotlin/io/element/android/features/lockscreen/impl/unlock/PinUnlockPresenter.kt

@@ -174,7 +174,7 @@ class PinUnlockPresenter(
 
     private fun CoroutineScope.signOut(signOutAction: MutableState<AsyncAction<Unit>>) = launch {
         suspend {
-            logoutUseCase.logout(ignoreSdkError = true)
+            logoutUseCase.logoutAll(ignoreSdkError = true)
         }.runCatchingUpdatingState(signOutAction)
     }
 }

features/logout/api/src/main/kotlin/io/element/android/features/logout/api/LogoutUseCase.kt

@@ -8,16 +8,12 @@
 package io.element.android.features.logout.api
 
 /**
- * Used to trigger a log out of the current user from any part of the app.
+ * Used to trigger a log out of the current user(s) from any part of the app.
  */
 interface LogoutUseCase {
     /**
-     * Log out the current user and then perform any needed cleanup tasks.
+     * Log out the current user(s) and then perform any needed cleanup tasks.
      * @param ignoreSdkError if true, the SDK error will be ignored and the user will be logged out anyway.
      */
-    suspend fun logout(ignoreSdkError: Boolean)
-
-    interface Factory {
-        fun create(sessionId: String): LogoutUseCase
-    }
+    suspend fun logoutAll(ignoreSdkError: Boolean)
 }

features/logout/impl/build.gradle.kts

@@ -39,4 +39,5 @@ dependencies {
     testCommonDependencies(libs, true)
     testImplementation(projects.libraries.matrix.test)
     testImplementation(projects.libraries.featureflag.test)
+    testImplementation(projects.libraries.sessionStorage.test)
 }

features/logout/impl/src/main/kotlin/io/element/android/features/logout/impl/DefaultLogoutUseCase.kt

@@ -12,22 +12,31 @@ import dev.zacsweers.metro.ContributesBinding
 import dev.zacsweers.metro.Inject
 import io.element.android.features.logout.api.LogoutUseCase
 import io.element.android.libraries.matrix.api.MatrixClientProvider
-import io.element.android.libraries.matrix.api.auth.MatrixAuthenticationService
+import io.element.android.libraries.matrix.api.core.SessionId
+import io.element.android.libraries.sessionstorage.api.SessionStore
+import timber.log.Timber
 
 @ContributesBinding(AppScope::class)
 @Inject
 class DefaultLogoutUseCase(
-    private val authenticationService: MatrixAuthenticationService,
+    private val sessionStore: SessionStore,
     private val matrixClientProvider: MatrixClientProvider,
 ) : LogoutUseCase {
-    override suspend fun logout(ignoreSdkError: Boolean) {
-        val currentSession = authenticationService.getLatestSessionId()
-        if (currentSession != null) {
-            matrixClientProvider.getOrRestore(currentSession)
-                .getOrThrow()
-                .logout(userInitiated = true, ignoreSdkError = true)
-        } else {
-            error("No session to sign out")
-        }
+    override suspend fun logoutAll(ignoreSdkError: Boolean) {
+        sessionStore.getAllSessions()
+            .map { sessionData ->
+                SessionId(sessionData.userId)
+            }
+            .forEach { sessionId ->
+                Timber.d("Logging out sessionId: $sessionId")
+                matrixClientProvider.getOrRestore(sessionId).fold(
+                    onSuccess = { client ->
+                        client.logout(userInitiated = true, ignoreSdkError = ignoreSdkError)
+                    },
+                    onFailure = { error ->
+                        Timber.e(error, "Failed to get or restore MatrixClient for sessionId: $sessionId")
+                    }
+                )
+            }
     }
 }

features/logout/impl/src/test/kotlin/io/element/android/features/logout/impl/DefaultLogoutUseCaseTest.kt

@@ -0,0 +1,120 @@
+/*
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+@file:OptIn(ExperimentalCoroutinesApi::class)
+
+package io.element.android.features.logout.impl
+
+import io.element.android.libraries.matrix.test.A_USER_ID
+import io.element.android.libraries.matrix.test.A_USER_ID_2
+import io.element.android.libraries.matrix.test.FakeMatrixClient
+import io.element.android.libraries.matrix.test.FakeMatrixClientProvider
+import io.element.android.libraries.sessionstorage.test.InMemorySessionStore
+import io.element.android.libraries.sessionstorage.test.aSessionData
+import io.element.android.tests.testutils.lambda.lambdaRecorder
+import io.element.android.tests.testutils.lambda.value
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runTest
+import org.junit.Test
+
+class DefaultLogoutUseCaseTest {
+    @Test
+    fun `test logout from one session`() = runTest {
+        val logoutLambda1 = lambdaRecorder<Boolean, Boolean, Unit> { _, _ -> }
+        val client1 = FakeMatrixClient(A_USER_ID).apply {
+            logoutLambda = logoutLambda1
+        }
+        val sut = DefaultLogoutUseCase(
+            sessionStore = InMemorySessionStore(
+                initialList = listOf(
+                    aSessionData(sessionId = A_USER_ID.value),
+                )
+            ),
+            matrixClientProvider = FakeMatrixClientProvider(
+                getClient = { sessionId ->
+                    when (sessionId) {
+                        A_USER_ID -> Result.success(client1)
+                        else -> error("Unexpected sessionId")
+                    }
+                }
+            ),
+        )
+        sut.logoutAll(ignoreSdkError = true)
+        logoutLambda1.assertions().isCalledOnce().with(value(true), value(true))
+    }
+
+    @Test
+    fun `test logout from several sessions`() = runTest {
+        val logoutLambda1 = lambdaRecorder<Boolean, Boolean, Unit> { _, _ -> }
+        val logoutLambda2 = lambdaRecorder<Boolean, Boolean, Unit> { _, _ -> }
+        val client1 = FakeMatrixClient(A_USER_ID).apply {
+            logoutLambda = logoutLambda1
+        }
+        val client2 = FakeMatrixClient(A_USER_ID_2).apply {
+            logoutLambda = logoutLambda2
+        }
+        val sut = DefaultLogoutUseCase(
+            sessionStore = InMemorySessionStore(
+                initialList = listOf(
+                    aSessionData(sessionId = A_USER_ID.value),
+                    aSessionData(sessionId = A_USER_ID_2.value),
+                )
+            ),
+            matrixClientProvider = FakeMatrixClientProvider(
+                getClient = { sessionId ->
+                    when (sessionId) {
+                        A_USER_ID -> Result.success(client1)
+                        A_USER_ID_2 -> Result.success(client2)
+                        else -> error("Unexpected sessionId")
+                    }
+                }
+            ),
+        )
+        sut.logoutAll(ignoreSdkError = true)
+        logoutLambda1.assertions().isCalledOnce().with(value(true), value(true))
+        logoutLambda2.assertions().isCalledOnce().with(value(true), value(true))
+    }
+
+    @Test
+    fun `test logout session not found is ignored`() = runTest {
+        val sut = DefaultLogoutUseCase(
+            sessionStore = InMemorySessionStore(
+                initialList = listOf(
+                    aSessionData(sessionId = A_USER_ID.value),
+                )
+            ),
+            matrixClientProvider = FakeMatrixClientProvider(
+                getClient = { sessionId ->
+                    when (sessionId) {
+                        A_USER_ID -> Result.failure(Exception("Session not found"))
+                        else -> error("Unexpected sessionId")
+                    }
+                }
+            ),
+        )
+        sut.logoutAll(ignoreSdkError = true)
+        // No error
+    }
+
+    @Test
+    fun `test logout no sessions`() = runTest {
+        val sut = DefaultLogoutUseCase(
+            sessionStore = InMemorySessionStore(
+                initialList = emptyList()
+            ),
+            matrixClientProvider = FakeMatrixClientProvider(
+                getClient = { sessionId ->
+                    when (sessionId) {
+                        else -> error("Unexpected sessionId")
+                    }
+                }
+            ),
+        )
+        sut.logoutAll(ignoreSdkError = true)
+        // No error
+    }
+}

features/logout/test/src/main/kotlin/io/element/android/features/logout/test/FakeLogoutUseCase.kt

@@ -14,7 +14,7 @@ import io.element.android.tests.testutils.simulateLongTask
 class FakeLogoutUseCase(
     var logoutLambda: (Boolean) -> Unit = { lambdaError() }
 ) : LogoutUseCase {
-    override suspend fun logout(ignoreSdkError: Boolean) = simulateLongTask {
+    override suspend fun logoutAll(ignoreSdkError: Boolean) = simulateLongTask {
         logoutLambda(ignoreSdkError)
     }
 }