change (media preview config) : manage migration of local data

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

@@ -41,6 +41,7 @@ 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.MediaPreviewConfigMigration
 import io.element.android.appnav.loggedin.SendQueues
 import io.element.android.appnav.room.RoomFlowNode
 import io.element.android.appnav.room.RoomNavigationTarget
@@ -114,6 +115,7 @@ class LoggedInFlowNode @AssistedInject constructor(
     private val sendingQueue: SendQueues,
     private val logoutEntryPoint: LogoutEntryPoint,
     private val incomingVerificationEntryPoint: IncomingVerificationEntryPoint,
+    private val mediaPreviewConfigMigration: MediaPreviewConfigMigration,
     snackbarDispatcher: SnackbarDispatcher,
 ) : BaseFlowNode<LoggedInFlowNode.NavTarget>(
     backstack = BackStack(
@@ -179,6 +181,7 @@ class LoggedInFlowNode @AssistedInject constructor(
                 appNavigationStateService.onNavigateToSpace(id, MAIN_SPACE)
                 loggedInFlowProcessor.observeEvents(sessionCoroutineScope)
                 matrixClient.sessionVerificationService().setListener(verificationListener)
+                mediaPreviewConfigMigration()
 
                 ftueService.state
                     .onEach { ftueState ->

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

@@ -0,0 +1,56 @@
+/*
+ * 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.
+ */
+
+package io.element.android.appnav.loggedin
+
+import io.element.android.libraries.di.annotations.SessionCoroutineScope
+import io.element.android.libraries.matrix.api.media.MediaPreviewService
+import io.element.android.libraries.preferences.api.store.AppPreferencesStore
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.launch
+import timber.log.Timber
+import javax.inject.Inject
+
+/**
+ * This migration is temporary, will be safe to remove after some time.
+ * The goal is to set the server config if it's not set, and remove the local data.
+ */
+class MediaPreviewConfigMigration @Inject constructor(
+    private val mediaPreviewService: MediaPreviewService,
+    private val appPreferencesStore: AppPreferencesStore,
+    @SessionCoroutineScope
+    private val sessionCoroutineScope: CoroutineScope,
+) {
+    operator fun invoke() = sessionCoroutineScope.launch {
+        val hideInviteAvatars = appPreferencesStore.getHideInviteAvatarsFlow().first()
+        val mediaPreviewValue = appPreferencesStore.getTimelineMediaPreviewValueFlow().first()
+        if (hideInviteAvatars == null && mediaPreviewValue == null) {
+            // No local data, abort.
+            return@launch
+        }
+        mediaPreviewService
+            .fetchMediaPreviewConfig()
+            .onSuccess { config ->
+                if (config != null) {
+                    appPreferencesStore.setHideInviteAvatars(null)
+                    appPreferencesStore.setTimelineMediaPreviewValue(null)
+                } else {
+                    if (hideInviteAvatars != null) {
+                        mediaPreviewService.setHideInviteAvatars(hideInviteAvatars)
+                        appPreferencesStore.setHideInviteAvatars(null)
+                    }
+                    if (mediaPreviewValue != null) {
+                        mediaPreviewService.setMediaPreviewValue(mediaPreviewValue)
+                        appPreferencesStore.setTimelineMediaPreviewValue(null)
+                    }
+                }
+            }.onFailure {
+                Timber.d("Couldn't perform migration, failed to fetch media preview config.")
+            }
+    }
+}