feat: riscrivi app in Flutter

Riscrittura completa da Vue 3 + Capacitor a Flutter/Dart. Architettura feature-based (lib/features/): - meal_planner: modello MealPlan/DayPlan, provider, pagina e widget - converter: modello ConversionEntry, provider con ricerca, pagina - shopping_list: modello ShoppingItem, provider con deduplicazione, pagina e widget Core: - Material 3 con seed color #2d6a4f - NavigationBar + IndexedStack (preserva stato dei tab) - Portrait lock via SystemChrome - Persistenza con shared_preferences - 50+ alimenti × metodi cottura in assets/data/conversions.json Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-16 17:41:26 +02:00
parent d49b31f21d
commit eb7912421c
20 changed files with 1656 additions and 0 deletions
@@ -0,0 +1,77 @@
+import 'dart:convert';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import '../models/conversion_entry.dart';
+
+class ConverterProvider extends ChangeNotifier {
+  List<ConversionEntry> _db = [];
+  List<ConversionEntry> _results = [];
+  ConversionEntry? _selected;
+  double? _grams;
+  bool _rawToCooked = true;
+
+  List<ConversionEntry> get results => _results;
+  ConversionEntry? get selected => _selected;
+  double? get grams => _grams;
+  bool get rawToCooked => _rawToCooked;
+
+  double? get result {
+    if (_selected == null || _grams == null || _grams! <= 0) return null;
+    final v = _rawToCooked
+        ? _selected!.rawToCooked(_grams!)
+        : _selected!.cookedToRaw(_grams!);
+    return (v * 10).roundToDouble() / 10;
+  }
+
+  Future<void> loadDb() async {
+    final raw = await rootBundle.loadString('assets/data/conversions.json');
+    final Map<String, dynamic> json = jsonDecode(raw);
+    _db = [
+      for (final food in json.keys)
+        for (final method in (json[food] as Map).keys)
+          ConversionEntry(
+            food: food,
+            method: method,
+            yieldFactor:
+                (json[food][method]['yield'] as num).toDouble(),
+          ),
+    ];
+    notifyListeners();
+  }
+
+  void search(String q) {
+    if (q.trim().isEmpty) {
+      _results = [];
+    } else {
+      final lower = q.toLowerCase();
+      _results = _db.where((e) => e.food.contains(lower)).toList();
+    }
+    notifyListeners();
+  }
+
+  void select(ConversionEntry entry) {
+    _selected = entry;
+    _results = [];
+    _grams = null;
+    notifyListeners();
+  }
+
+  void setGrams(double? value) {
+    _grams = value;
+    notifyListeners();
+  }
+
+  void swapDirection() {
+    _rawToCooked = !_rawToCooked;
+    _grams = null;
+    notifyListeners();
+  }
+
+  void reset() {
+    _selected = null;
+    _results = [];
+    _grams = null;
+    _rawToCooked = true;
+    notifyListeners();
+  }
+}