Initial Flutter booru app

lib/backend/repositories/search_repository.dart

@@ -0,0 +1,39 @@
+import 'package:isar/isar.dart';
+
+import '../../core/database/app_database.dart';
+import '../../core/database/database_service.dart';
+import '../../core/utils/result.dart';
+import '../models/search_history.dart';
+
+class SearchRepository {
+  SearchRepository(this._databaseService);
+
+  final DatabaseService _databaseService;
+
+  Future<Result<void>> save(SearchHistory history) {
+    return _databaseService.safeWrite((isar) async {
+      await isar.searchHistoryEntitys.put(
+        SearchHistoryEntity()
+          ..historyId = history.id
+          ..query = history.query
+          ..tags = history.tags
+          ..searchedAt = history.searchedAt
+          ..resultCount = history.resultCount,
+      );
+    });
+  }
+
+  Future<Result<List<SearchHistory>>> recent({int limit = 20}) {
+    return _databaseService.safeRead((isar) async {
+      final items = await isar.searchHistoryEntitys.where().findAll();
+      items.sort((a, b) => b.searchedAt.compareTo(a.searchedAt));
+      return items.take(limit).map((entity) => entity.toModel()).toList();
+    });
+  }
+
+  Future<Result<void>> clear() {
+    return _databaseService.safeWrite((isar) async {
+      await isar.searchHistoryEntitys.clear();
+    });
+  }
+}