Refactor backup/restore

Close #575

core/preferences/src/main/java/de/mm20/launcher2/preferences/ImportExport.kt

@@ -3,6 +3,7 @@ package de.mm20.launcher2.preferences
 import android.content.Context
 import androidx.datastore.core.DataStoreFactory
 import androidx.datastore.core.handlers.ReplaceFileCorruptionHandler
+import de.mm20.launcher2.backup.Backupable
 import de.mm20.launcher2.crashreporter.CrashReporter
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -11,6 +12,19 @@ import kotlinx.coroutines.cancel
 import kotlinx.coroutines.flow.firstOrNull
 import java.io.File
 
+internal class LauncherStoreBackupComponent(
+    private val context: Context,
+    private val dataStore: LauncherDataStore
+): Backupable {
+    override suspend fun backup(toDir: File) {
+        dataStore.export(toDir)
+    }
+
+    override suspend fun restore(fromDir: File) {
+        dataStore.import(context, fromDir)
+    }
+}
+
 suspend fun LauncherDataStore.export(toDir: File) {
     val scope = CoroutineScope(Dispatchers.IO + SupervisorJob())
     val backupDataStore = DataStoreFactory.create(

core/preferences/src/main/java/de/mm20/launcher2/preferences/Module.kt

@@ -1,8 +1,11 @@
 package de.mm20.launcher2.preferences
 
+import de.mm20.launcher2.backup.Backupable
 import org.koin.android.ext.koin.androidContext
+import org.koin.core.qualifier.named
 import org.koin.dsl.module
 
 val preferencesModule = module {
     single { androidContext().dataStore }
+    factory<Backupable>(named<LauncherDataStore>()) { LauncherStoreBackupComponent(androidContext(), get()) }
 }