Clean up category restoring logic

app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupRestoreJob.kt

@@ -26,8 +26,6 @@ class BackupRestoreJob(private val context: Context, workerParams: WorkerParamet
     private val notifier = BackupNotifier(context)
 
     override suspend fun doWork(): Result {
-        if (isRunning(context)) return Result.failure()
-
         val uri = inputData.getString(LOCATION_URI_KEY)?.toUri()
             ?: return Result.failure()
         val sync = inputData.getBoolean(SYNC_KEY, false)

app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupRestorer.kt

@@ -21,7 +21,7 @@ import eu.kanade.tachiyomi.source.sourcePreferences
 import eu.kanade.tachiyomi.util.BackupUtil
 import eu.kanade.tachiyomi.util.system.createFileInCacheDir
 import kotlinx.coroutines.coroutineScope
-import kotlinx.coroutines.isActive
+import kotlinx.coroutines.ensureActive
 import tachiyomi.core.i18n.stringResource
 import tachiyomi.core.preference.AndroidPreferenceStore
 import tachiyomi.core.preference.PreferenceStore
@@ -74,14 +74,12 @@ class BackupRestorer(
 
     private val errors = mutableListOf<Pair<Date, String>>()
 
-    suspend fun syncFromBackup(uri: Uri, sync: Boolean): Boolean {
+    suspend fun syncFromBackup(uri: Uri, sync: Boolean) {
         val startTime = System.currentTimeMillis()
         restoreProgress = 0
         errors.clear()
 
-        if (!performRestore(uri, sync)) {
-            return false
-        }
+        performRestore(uri, sync)
 
         val endTime = System.currentTimeMillis()
         val time = endTime - startTime
@@ -99,7 +97,6 @@ class BackupRestorer(
         } else {
             notifier.showRestoreComplete(time, errors.size, logFile.parent, logFile.name)
         }
-        return true
     }
 
     private fun writeErrorLog(): File {
@@ -121,66 +118,48 @@ class BackupRestorer(
         return File("")
     }
 
-    private suspend fun performRestore(uri: Uri, sync: Boolean): Boolean {
+    private suspend fun performRestore(uri: Uri, sync: Boolean) {
         val backup = BackupUtil.decodeBackup(context, uri)
 
         restoreAmount = backup.backupManga.size + 3 // +3 for categories, app prefs, source prefs
 
-        // Restore categories
-        if (backup.backupCategories.isNotEmpty()) {
-            restoreCategories(backup.backupCategories)
-        }
-
         // Store source mapping for error messages
         val backupMaps = backup.backupBrokenSources.map { BackupSource(it.name, it.sourceId) } + backup.backupSources
         sourceMapping = backupMaps.associate { it.sourceId to it.name }
         now = ZonedDateTime.now()
         currentFetchWindow = fetchInterval.getWindow(now)
 
-        return coroutineScope {
+        coroutineScope {
+            ensureActive()
+            restoreCategories(backup.backupCategories)
+
+            ensureActive()
             restoreAppPreferences(backup.backupPreferences)
+
+            ensureActive()
             restoreSourcePreferences(backup.backupSourcePreferences)
 
             // Restore individual manga
             backup.backupManga.forEach {
-                if (!isActive) {
-                    return@coroutineScope false
-                }
-
+                ensureActive()
                 restoreManga(it, backup.backupCategories, sync)
             }
-            // TODO: optionally trigger online library + tracker update
 
-            true
+            // TODO: optionally trigger online library + tracker update
         }
     }
 
     private suspend fun restoreCategories(backupCategories: List<BackupCategory>) {
-        // Get categories from file and from db
+        if (backupCategories.isNotEmpty()) {
             val dbCategories = getCategories.await()
+            val dbCategoriesByName = dbCategories.associateBy { it.name }
 
             val categories = backupCategories.map {
-            var category = it.getCategory()
-            var found = false
-            for (dbCategory in dbCategories) {
-                // If the category is already in the db, assign the id to the file's category
-                // and do nothing
-                if (category.name == dbCategory.name) {
-                    category = category.copy(id = dbCategory.id)
-                    found = true
-                    break
-                }
-            }
-            if (!found) {
-                // Let the db assign the id
-                val id = handler.awaitOneExecutable {
-                    categoriesQueries.insert(category.name, category.order, category.flags)
+                dbCategoriesByName[it.name]
+                    ?: handler.awaitOneExecutable {
+                        categoriesQueries.insert(it.name, it.order, it.flags)
                         categoriesQueries.selectLastInsertedRowId()
-                }
-                category = category.copy(id = id)
-            }
-
-            category
+                    }.let { id -> it.toCategory(id) }
             }
 
             libraryPreferences.categorizedDisplaySettings().set(
@@ -188,6 +167,7 @@ class BackupRestorer(
                     .distinctBy { it.flags }
                     .size > 1,
             )
+        }
 
         restoreProgress += 1
         showRestoreProgress(

app/src/main/java/eu/kanade/tachiyomi/data/backup/models/BackupCategory.kt

@@ -11,14 +11,12 @@ class BackupCategory(
     // @ProtoNumber(3) val updateInterval: Int = 0, 1.x value not used in 0.x
     @ProtoNumber(100) var flags: Long = 0,
 ) {
-    fun getCategory(): Category {
-        return Category(
-            id = 0,
+    fun toCategory(id: Long) = Category(
+        id = id,
         name = this@BackupCategory.name,
         flags = this@BackupCategory.flags,
         order = this@BackupCategory.order,
     )
-    }
 }
 
 val backupCategoryMapper = { category: Category ->