Add initial project files and configurations for bus_running_record app

lib/services/brr_export_service.dart

@@ -0,0 +1,44 @@
+import "dart:typed_data";
+import "../models/trip.dart";
+import "../models/brr_metadata.dart";
+import "../exporters/brr_exporter.dart";
+import "../exporters/arriva_brr_exporter.dart";
+import "../exporters/stagecoach_brr_exporter.dart";
+
+enum BRROperator { arriva, stagecoach }
+
+class ExportResult {
+  final Uint8List? bytes;
+  final List<String> errors;
+  bool get isSuccess => errors.isEmpty;
+
+  ExportResult.success(this.bytes) : errors = [];
+  ExportResult.error(this.errors) : bytes = null;
+}
+
+class BRRExportService {
+  final BRROperator operator;
+
+  BRRExportService({this.operator = BRROperator.arriva});
+
+  BRRExporter get _exporter {
+    switch (operator) {
+      case BRROperator.arriva:
+        return ArrivaBRRExporter();
+      case BRROperator.stagecoach:
+        return StagecoachBRRExporter();
+    }
+  }
+
+  Future<ExportResult> exportBRR(
+    List<Trip> trips,
+    BRRMetadata metadata,
+  ) async {
+    try {
+      final bytes = await _exporter.export(trips, metadata);
+      return ExportResult.success(bytes);
+    } catch (e) {
+      return ExportResult.error(["Export failed: $e"]);
+    }
+  }
+}

lib/services/storage_service.dart

@@ -0,0 +1,33 @@
+import "dart:convert";
+import "package:hive_flutter/hive_flutter.dart";
+import "../models/brr_state.dart";
+
+class StorageService {
+  static const _boxName = "brr_box";
+  static const _stateKey = "brr_state";
+
+  Future<Box<String>> _openBox() => Hive.openBox<String>(_boxName);
+
+  Future<void> saveState(BRRState state) async {
+    final box = await _openBox();
+    await box.put(_stateKey, jsonEncode(state.toJson()));
+  }
+
+  Future<BRRState?> loadState() async {
+    final box = await _openBox();
+    final jsonString = box.get(_stateKey);
+
+    if (jsonString == null) return null;
+
+    try {
+      return BRRState.fromJson(jsonDecode(jsonString) as Map<String, dynamic>);
+    } catch (e) {
+      return null;
+    }
+  }
+
+  Future<void> clearState() async {
+    final box = await _openBox();
+    await box.delete(_stateKey);
+  }
+}