Handle properly the migration of DefaultSessionPreferencesStore #2742

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

@@ -29,9 +29,7 @@ import io.element.android.libraries.di.annotations.SessionCoroutineScope
 import io.element.android.libraries.matrix.api.core.SessionId
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.runBlocking
 import java.io.File
 
 class DefaultSessionPreferencesStore(
@@ -53,7 +51,15 @@ class DefaultSessionPreferencesStore(
     private val renderTypingNotificationsKey = booleanPreferencesKey("renderTypingNotifications")
 
     private val dataStoreFile = storeFile(context, sessionId)
-    private val store = PreferenceDataStoreFactory.create(scope = sessionCoroutineScope) { dataStoreFile }
+    private val store = PreferenceDataStoreFactory.create(
+        scope = sessionCoroutineScope,
+        migrations = listOf(
+            SessionPreferencesStoreMigration(
+                sharePresenceKey,
+                sendPublicReadReceiptsKey,
+            )
+        ),
+    ) { dataStoreFile }
 
     override suspend fun setSharePresence(enabled: Boolean) {
         update(sharePresenceKey, enabled)
@@ -65,8 +71,7 @@ class DefaultSessionPreferencesStore(
     }
 
     override fun isSharePresenceEnabled(): Flow<Boolean> {
-        // Migration, if sendPublicReadReceiptsKey was false, consider that sharing presence is false.
-        return get(sharePresenceKey) { runBlocking { isSendPublicReadReceiptsEnabled().first() } }
+        return get(sharePresenceKey) { true }
     }
 
     override suspend fun setSendPublicReadReceipts(enabled: Boolean) = update(sendPublicReadReceiptsKey, enabled)

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

@@ -0,0 +1,39 @@
+/*
+ * 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.preferences.impl.store
+
+import androidx.datastore.core.DataMigration
+import androidx.datastore.preferences.core.Preferences
+
+class SessionPreferencesStoreMigration(
+    private val sharePresenceKey: Preferences.Key<Boolean>,
+    private val sendPublicReadReceiptsKey: Preferences.Key<Boolean>,
+) : DataMigration<Preferences> {
+    override suspend fun cleanUp() = Unit
+
+    override suspend fun shouldMigrate(currentData: Preferences): Boolean {
+        return currentData[sharePresenceKey] == null
+    }
+
+    override suspend fun migrate(currentData: Preferences): Preferences {
+        // If sendPublicReadReceiptsKey was false, consider that sharing presence is false.
+        val defaultValue = currentData[sendPublicReadReceiptsKey] ?: true
+        return currentData.toMutablePreferences().apply {
+            set(sharePresenceKey, defaultValue)
+        }.toPreferences()
+    }
+}