davide
cebeaf889a
Porta la funzionalità QR code dalla versione Vue a Flutter.
Condividi: pulsante in fondo alla tab Pasti (attivo solo con piano
non vuoto) → bottom sheet con QR code generato da qr_flutter.
Payload: { "v": 1, "meals": { ... } }, limite 2953 byte.
Ricevi: pulsante sempre visibile → QrScanPage full-screen con
fotocamera via mobile_scanner, cornice di mira, validazione
struttura JSON e importazione via MealPlannerProvider.importPlan().
Nuovi package: qr_flutter ^4.1.0, mobile_scanner ^5.0.0
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
100 lines
3.0 KiB
Dart
100 lines
3.0 KiB
Dart
import 'dart:convert';
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import 'package:flutter/material.dart';
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import 'package:qr_flutter/qr_flutter.dart';
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import '../../models/meal_plan.dart';
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const int _kQrMaxBytes = 2953;
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void showQrShareSheet(BuildContext context, MealPlan plan) {
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showModalBottomSheet(
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context: context,
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isScrollControlled: true,
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shape: const RoundedRectangleBorder(
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borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
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),
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builder: (_) => _QrShareSheet(plan: plan),
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);
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}
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class _QrShareSheet extends StatelessWidget {
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final MealPlan plan;
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const _QrShareSheet({required this.plan});
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String? _buildPayload() {
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final payload = jsonEncode({'v': 1, 'meals': plan.days.map(
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(k, v) => MapEntry(k, {
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'colazione': v.colazione,
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'pranzo': v.pranzo,
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'cena': v.cena,
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}),
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)});
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if (payload.length > _kQrMaxBytes) return null;
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return payload;
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}
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@override
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Widget build(BuildContext context) {
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final payload = _buildPayload();
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final scheme = Theme.of(context).colorScheme;
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return SafeArea(
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child: Padding(
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padding: const EdgeInsets.fromLTRB(20, 12, 20, 32),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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// handle
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Container(
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width: 36, height: 4,
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decoration: BoxDecoration(
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color: scheme.outlineVariant,
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borderRadius: BorderRadius.circular(2),
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),
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),
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const SizedBox(height: 16),
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Text('Condividi piano',
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style: Theme.of(context)
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.textTheme
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.titleMedium
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?.copyWith(fontWeight: FontWeight.bold)),
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IconButton(
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icon: const Icon(Icons.close),
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onPressed: () => Navigator.pop(context),
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),
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],
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),
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const SizedBox(height: 4),
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Text(
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'Fai scansionare questo codice dall\'altro dispositivo',
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style: Theme.of(context).textTheme.bodySmall?.copyWith(
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color: scheme.onSurfaceVariant,
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),
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),
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const SizedBox(height: 20),
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if (payload == null)
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Padding(
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padding: const EdgeInsets.symmetric(vertical: 24),
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child: Text(
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'Dati troppo grandi per un QR code.\nRiduci il numero di alimenti inseriti.',
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textAlign: TextAlign.center,
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style: TextStyle(color: scheme.error),
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),
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)
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else
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QrImageView(
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data: payload,
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version: QrVersions.auto,
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size: 260,
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errorCorrectionLevel: QrErrorCorrectLevel.L,
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backgroundColor: Colors.white,
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),
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],
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),
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),
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);
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}
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}
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