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 'dart:convert';
+
+import '../helper/storage_keys.dart';
+import 'anwendung_model.dart';
+import 'bauteil_model.dart';
+import 'kauf_filament_model.dart';
+
+class BackupModel {
+  static const keys = [
+    StorageKeys.filamente,
+    StorageKeys.anwendungen,
+    StorageKeys.bauteile,
+    StorageKeys.materialien,
+  ];
+  final Map<String, List<Map<String, dynamic>>> data;
+
+  const BackupModel(this.data);
+
+  String encode() => const JsonEncoder.withIndent('  ').convert({
+    'format': 'ertl_filament_verwaltung',
+    'version': 1,
+    'exportiertAm': DateTime.now().toUtc().toIso8601String(),
+    'daten': data,
+  });
+
+  factory BackupModel.decode(String source) {
+    try {
+      final json =
+          jsonDecode(source.replaceFirst(RegExp(r'^\uFEFF'), '')) as Map;
+      if (json['format'] != 'ertl_filament_verwaltung' ||
+          json['version'] != 1) {
+        throw const FormatException();
+      }
+      final raw = json['daten'] as Map;
+      final data = <String, List<Map<String, dynamic>>>{
+        for (final key in keys)
+          key: (raw[key] as List)
+              .map((item) => Map<String, dynamic>.from(item as Map))
+              .toList(),
+      };
+      final filamentIds = <String>{};
+      for (final json in data[StorageKeys.filamente]!) {
+        final item = KaufFilamentModel.fromJson(json);
+        if (item.filamentId.isEmpty ||
+            !filamentIds.add(item.filamentId) ||
+            item.material.trim().isEmpty ||
+            !_positive(item.gewichtGramm) ||
+            !_nonNegative(item.preis)) {
+          throw const FormatException();
+        }
+      }
+      final profileIds = <String>{};
+      for (final json in data[StorageKeys.anwendungen]!) {
+        final item = AnwendungModel.fromJson(json);
+        if (item.anwendungId.isEmpty ||
+            !profileIds.add(item.anwendungId) ||
+            item.filamentId.isEmpty ||
+            !_positive(item.druckTemperatur) ||
+            !_nonNegative(item.druckbettTemperatur) ||
+            (item.bauraumTemperatur != null &&
+                !_nonNegative(item.bauraumTemperatur!))) {
+          throw const FormatException();
+        }
+      }
+      final partIds = <String>{};
+      for (final json in data[StorageKeys.bauteile]!) {
+        final item = BauteilModel.fromJson(json);
+        if (item.bauteilId.isEmpty ||
+            !partIds.add(item.bauteilId) ||
+            item.name.trim().isEmpty ||
+            item.druckdauerMinuten <= 0 ||
+            !_positive(item.gewichtGramm) ||
+            !_nonNegative(item.abfallGramm) ||
+            item.filamente.isEmpty ||
+            item.filamente.any(
+              (entry) =>
+                  entry.filamentId.isEmpty ||
+                  !_nonNegative(entry.verbrauchGramm),
+            )) {
+          throw const FormatException();
+        }
+        if (item.fotoBase64 != null) base64Decode(item.fotoBase64!);
+      }
+      final materials = data[StorageKeys.materialien]!;
+      if (materials.isNotEmpty) {
+        if (materials.length != 1) throw const FormatException();
+        final values = (materials.single['werte'] as List).cast<String>();
+        if (values.any((value) => value.trim().isEmpty) ||
+            values.map((value) => value.toLowerCase()).toSet().length !=
+                values.length) {
+          throw const FormatException();
+        }
+      }
+      return BackupModel(data);
+    } catch (_) {
+      throw const FormatException(
+        'Ungültige oder nicht unterstützte Datensicherung. Bitte eine vollständige JSON-Datei dieser App auswählen.',
+      );
+    }
+  }
+
+  static bool _nonNegative(num value) => value.isFinite && value >= 0;
+  static bool _positive(num? value) =>
+      value != null && value.isFinite && value > 0;
+}