feature: Re-implemented syncing

lib/util/migration/isar_drift_migration.dart

@@ -0,0 +1,80 @@
+import 'dart:convert';
+import 'dart:developer';
+import 'dart:io';
+
+import 'package:flutter/foundation.dart';
+
+import 'package:drift/drift.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:isar/isar.dart';
+import 'package:path/path.dart' as path;
+import 'package:path_provider/path_provider.dart';
+
+import 'package:fladder/models/syncing/database_item.dart';
+import 'package:fladder/models/syncing/i_synced_item.dart';
+import 'package:fladder/models/syncing/sync_item.dart';
+
+Future<void> isarMigration(Ref ref, AppDatabase db, String savePath) async {
+  if (kIsWeb) return;
+
+  //Return if the database is already migrated
+  final isNotEmtpy = await db.select(db.databaseItems).get().then((value) => value.isNotEmpty);
+  if (isNotEmtpy) {
+    log('Isar database is not empty, skipping migration');
+    return;
+  }
+
+  //Open isar database
+  final applicationDirectory = await getApplicationDocumentsDirectory();
+  final isarPath = Directory(path.joinAll([applicationDirectory.path, 'Fladder', 'Database']));
+  await isarPath.create(recursive: true);
+  final isar = Isar.open(
+    schemas: [ISyncedItemSchema],
+    directory: isarPath.path,
+  );
+
+  //Fetch all synced items from the old database
+  List<SyncedItem> items = isar.iSyncedItems
+      .where()
+      .findAll()
+      .map((e) => SyncedItem.fromIsar(e, path.joinAll([savePath, e.userId ?? "Unkown User"])))
+      .toList();
+
+  //Clear any missing paths
+  items = items.where((e) => e.path != null ? Directory(e.path!).existsSync() : false).toList();
+
+  //Convert to drift database items
+  final driftItems = items.map(
+    (item) => DatabaseItemsCompanion(
+      id: Value(item.id),
+      parentId: Value(item.parentId),
+      syncing: Value(item.syncing),
+      userId: Value(item.userId),
+      path: Value(item.path),
+      fileSize: Value(item.fileSize),
+      sortName: Value(item.sortName),
+      videoFileName: Value(item.videoFileName),
+      trickPlayModel: Value(item.fTrickPlayModel != null ? jsonEncode(item.fTrickPlayModel?.toJson()) : null),
+      mediaSegments: Value(item.mediaSegments != null ? jsonEncode(item.mediaSegments?.toJson()) : null),
+      images: Value(item.fImages != null ? jsonEncode(item.fImages?.toJson()) : null),
+      chapters: Value(jsonEncode(item.fChapters.map((e) => e.toJson()).toList())),
+      subtitles: Value(jsonEncode(item.subtitles.map((e) => e.toJson()).toList())),
+      userData: Value(item.userData != null ? jsonEncode(item.userData?.toJson()) : null),
+    ),
+  );
+
+  await db.batch((batch) {
+    batch.insertAll(
+      db.databaseItems,
+      driftItems,
+      mode: InsertMode.insertOrReplace,
+    );
+  });
+
+  //Delete database file
+  final baseFolder = Directory(path.join(applicationDirectory.path, 'Fladder'));
+  if (await baseFolder.exists()) {
+    log('Deleting old Fladder base folder: ${baseFolder.path}');
+    // await baseFolder.delete(recursive: true);
+  }
+}