vjrj
2812c99280
Interchange export/import for Phase 1 (data-model §7): - JSON: canonical, versioned envelope (formatVersion 1) with all sync metadata verbatim, photos embedded as base64, tombstones excluded. Species are re-resolved on import by scientific name (catalog ids are per-install). Reader tolerates unknown fields/enum values (§5.2) and rejects newer format versions with a clear error. - CSV: export-only spreadsheet flatten, one row per lot, RFC 4180 escaping, never any photo bytes. - Import merges by UUIDv7 id in one transaction: insert-if-unknown preserving original stamps, last-writer-wins by packed HLC for known mutable rows, append-only movements; afterwards the local clock receiveEvent()s the newest imported stamp so it never runs behind. - Settings gains a Backup section (export CSV/JSON, import JSON with confirmation); file dialogs behind a FileService interface backed by file_picker (MIT). - Tests: codec round-trip and tolerance, reconciler LWW, repository export→import round-trip (fresh DB, idempotent re-import, newer-local wins, clock monotonicity, species re-resolution), backup widget flows.
102 lines
3.2 KiB
Dart
102 lines
3.2 KiB
Dart
import 'package:flutter/material.dart';
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import '../di/injector.dart';
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import '../i18n/strings.g.dart';
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import '../services/export_import_service.dart';
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/// The three backup actions shown in Settings: export CSV, export JSON and
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/// import JSON. Import asks for confirmation first (it merges into the live
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/// inventory), then reports what happened in a SnackBar.
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class BackupSection extends StatelessWidget {
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const BackupSection({this.service, super.key});
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/// Injectable for widget tests; the app resolves it lazily (on tap) from
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/// the service locator so merely mounting Settings needs no DI setup.
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final ExportImportService? service;
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ExportImportService get _service => service ?? getIt<ExportImportService>();
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@override
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Widget build(BuildContext context) {
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final t = context.t;
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return Column(
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children: [
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ListTile(
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leading: const Icon(Icons.table_view_outlined),
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title: Text(t.backup.exportCsv),
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subtitle: Text(t.backup.exportCsvSubtitle),
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onTap: () => _runExport(context, () => _service.exportCsv()),
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),
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ListTile(
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leading: const Icon(Icons.file_download_outlined),
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title: Text(t.backup.exportJson),
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subtitle: Text(t.backup.exportJsonSubtitle),
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onTap: () => _runExport(context, () => _service.exportJson()),
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),
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ListTile(
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leading: const Icon(Icons.file_upload_outlined),
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title: Text(t.backup.importJson),
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subtitle: Text(t.backup.importJsonSubtitle),
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onTap: () => _runImport(context),
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),
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],
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);
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}
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Future<void> _runExport(
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BuildContext context,
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Future<bool> Function() export,
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) async {
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final t = context.t;
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final messenger = ScaffoldMessenger.of(context);
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try {
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final saved = await export();
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_show(messenger, saved ? t.backup.exportSaved : t.backup.cancelled);
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} on Object {
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_show(messenger, t.backup.failed);
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}
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}
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Future<void> _runImport(BuildContext context) async {
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final t = context.t;
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final messenger = ScaffoldMessenger.of(context);
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final confirmed = await showDialog<bool>(
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context: context,
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builder: (dialogContext) => AlertDialog(
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title: Text(t.backup.importConfirmTitle),
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content: Text(t.backup.importConfirmBody),
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actions: [
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TextButton(
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onPressed: () => Navigator.of(dialogContext).pop(false),
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child: Text(t.common.cancel),
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),
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FilledButton(
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onPressed: () => Navigator.of(dialogContext).pop(true),
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child: Text(t.backup.importAction),
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),
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],
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),
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);
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if (confirmed != true) return;
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try {
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final summary = await _service.importJson();
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_show(
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messenger,
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summary == null
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? t.backup.cancelled
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: t.backup.importDone(
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added: summary.inserted,
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updated: summary.updated,
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),
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);
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} on FormatException {
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_show(messenger, t.backup.importFailed);
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} on Object {
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_show(messenger, t.backup.failed);
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}
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}
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void _show(ScaffoldMessengerState messenger, String message) {
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messenger.showSnackBar(SnackBar(content: Text(message)));
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}
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}
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