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.
47 lines
1.4 KiB
Dart
47 lines
1.4 KiB
Dart
import 'dart:io';
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import 'dart:typed_data';
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import 'package:file_picker/file_picker.dart';
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import 'file_service.dart';
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/// [FileService] backed by the `file_picker` plugin (one plugin covers the
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/// save and open dialogs on Android, iOS and desktop).
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class FilePickerFileService implements FileService {
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const FilePickerFileService();
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@override
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Future<String?> saveFile({
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required String suggestedName,
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required Uint8List bytes,
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}) async {
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final path = await FilePicker.platform.saveFile(
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fileName: suggestedName,
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bytes: bytes,
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);
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if (path == null) return null;
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// On mobile the plugin writes [bytes] itself; on desktop it only returns
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// the chosen path, so write them here.
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if (!Platform.isAndroid && !Platform.isIOS) {
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await File(path).writeAsBytes(bytes, flush: true);
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}
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return path;
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}
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@override
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Future<Uint8List?> pickFileBytes({List<String>? allowedExtensions}) async {
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final result = await FilePicker.platform.pickFiles(
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type: allowedExtensions == null ? FileType.any : FileType.custom,
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allowedExtensions: allowedExtensions,
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withData: true,
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);
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final file = result?.files.singleOrNull;
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if (file == null) return null;
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// withData should populate bytes; fall back to the path just in case.
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final bytes = file.bytes;
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if (bytes != null) return bytes;
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final path = file.path;
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if (path == null) return null;
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return File(path).readAsBytes();
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}
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}
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