adding packages

experimental/pocketbase_sync/lib/repo/drift/schema.dart

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+import 'package:drift/drift.dart';
+
+part 'schema.g.dart';
+
+/// Stores the actual data records + sync metadata
+/// We use a composite primary key of (collection, id) to store multiple collections in one table
+class SyncEntries extends Table {
+  TextColumn get collection => text()();
+  TextColumn get id => text()();
+
+  /// serialized JSON of the current local data
+  TextColumn get data => text()();
+
+  /// serialized JSON of the base data (snapshot)
+  TextColumn get baseData => text().nullable()();
+
+  DateTimeColumn get serverUpdatedAt => dateTime().nullable()();
+  BoolColumn get isDirty => boolean().withDefault(const Constant(false))();
+  BoolColumn get isDeleted => boolean().withDefault(const Constant(false))();
+  DateTimeColumn get deletedAt => dateTime().nullable()();
+
+  @override
+  Set<Column> get primaryKey => {collection, id};
+}
+
+/// Stores global sync state per collection (e.g. last sync time)
+class SyncMeta extends Table {
+  TextColumn get collection => text()();
+  DateTimeColumn get lastSync => dateTime().withDefault(
+        Constant(DateTime.fromMillisecondsSinceEpoch(0)),
+      )();
+
+  @override
+  Set<Column> get primaryKey => {collection};
+}
+
+/// Dummy database class to trigger generation of Companions and Data classes
+/// which are used by DriftSyncRepository.
+@DriftDatabase(tables: [SyncEntries, SyncMeta])
+class PackageDatabase extends _$PackageDatabase implements SyncDatabase {
+  PackageDatabase(super.e);
+  @override
+  int get schemaVersion => 1;
+
+  @override
+  GeneratedDatabase get db => this;
+}
+
+/// Interface that your AppDatabase must implement to be used with DriftSyncRepository.
+/// This allows the repository to be agnostic of the specific generated database class.
+abstract class SyncDatabase {
+  GeneratedDatabase get db;
+  TableInfo<SyncEntries, SyncEntry> get syncEntries;
+  TableInfo<SyncMeta, SyncMetaData> get syncMeta;
+}