add import export and items

2026-10-28 08:10:55 +01:00
parent 07a1bb02fd
commit 4a1731f986
22 changed files with 1118 additions and 106 deletions
@@ -0,0 +1,105 @@
+import 'package:get/get.dart';
+import 'package:intl/intl.dart';
+
+import '../models/backup_model.dart';
+import '../services/backup_file_service.dart';
+import '../services/get_storage_services.dart';
+import 'home_controller.dart';
+
+class ExportController extends GetxController {
+  ExportController({BackupFileService? fileService})
+    : fileService = fileService ?? BackupFileService();
+
+  final BackupFileService fileService;
+  final storage = Get.find<GetStorageService>();
+  final isBusy = false.obs;
+  final message = RxnString();
+  final hasError = false.obs;
+  final pendingBackup = Rxn<BackupModel>();
+
+  Future<void> exportData() async {
+    if (isBusy.value) return;
+    isBusy.value = true;
+    message.value = null;
+    try {
+      final backup = BackupModel({
+        for (final key in BackupModel.keys) key: storage.getModelList(key),
+      });
+      final name =
+          'filament_backup_${DateFormat('yyyy-MM-dd_HH-mm-ss').format(DateTime.now())}.json';
+      if (await fileService.save(backup.encode(), name)) {
+        hasError.value = false;
+        message.value = 'Datensicherung als JSON-Datei exportiert.';
+      }
+    } catch (_) {
+      _error('Export fehlgeschlagen. Bitte erneut versuchen.');
+    } finally {
+      isBusy.value = false;
+    }
+  }
+
+  Future<void> selectImport() async {
+    if (isBusy.value) return;
+    isBusy.value = true;
+    message.value = null;
+    pendingBackup.value = null;
+    try {
+      final source = await fileService.open();
+      if (source != null) pendingBackup.value = BackupModel.decode(source);
+    } on FormatException catch (error) {
+      _error(error.message);
+    } catch (_) {
+      _error('Datei konnte nicht gelesen werden. Bitte erneut versuchen.');
+    } finally {
+      isBusy.value = false;
+    }
+  }
+
+  Future<void> importData() async {
+    final backup = pendingBackup.value;
+    if (isBusy.value || backup == null) return;
+    isBusy.value = true;
+    message.value = null;
+    final previous = <String, List<Map<String, dynamic>>>{};
+    final attempted = <String>[];
+    try {
+      for (final key in BackupModel.keys) {
+        previous[key] = storage.getModelList(key);
+      }
+      for (final key in BackupModel.keys) {
+        attempted.add(key);
+        await storage.saveModelList(key, backup.data[key]!);
+      }
+      if (Get.isRegistered<HomeController>()) {
+        final home = Get.find<HomeController>();
+        home.loadFilamente();
+        home.loadMaterialien();
+        home.resetForm();
+      }
+      pendingBackup.value = null;
+      hasError.value = false;
+      message.value = 'Alle Daten wurden importiert.';
+    } catch (_) {
+      var restored = true;
+      for (final key in attempted.reversed) {
+        try {
+          await storage.saveModelList(key, previous[key]!);
+        } catch (_) {
+          restored = false;
+        }
+      }
+      _error(
+        restored
+            ? 'Import fehlgeschlagen. Die bisherigen Daten wurden beibehalten.'
+            : 'Import und Wiederherstellung fehlgeschlagen. Bitte die Datensicherung erneut importieren.',
+      );
+    } finally {
+      isBusy.value = false;
+    }
+  }
+
+  void _error(String text) {
+    hasError.value = true;
+    message.value = text;
+  }
+}