Version initiale de Gestion Prix
App Flutter de gestion de stock/prix pour tablette Android (100% local) : scan code-barres (OpenFoodFacts), prix au kilo/litre, packs, inventaire, prix d'achat + marge, filtres de tri, étiquettes PDF, design noir & blanc. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
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import 'package:flutter/material.dart';
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import 'package:mobile_scanner/mobile_scanner.dart';
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import '../models/produit.dart';
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import '../services/openfoodfacts_service.dart';
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import '../services/produit_repository.dart';
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import '../theme.dart';
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import 'produit_edit_screen.dart';
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/// Onglet 2 : scan d'un code-barres → recherche OpenFoodFacts → formulaire.
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class ScanScreen extends StatefulWidget {
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final bool active;
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const ScanScreen({super.key, required this.active});
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@override
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State<ScanScreen> createState() => _ScanScreenState();
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}
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class _ScanScreenState extends State<ScanScreen> {
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final _controller = MobileScannerController(
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detectionSpeed: DetectionSpeed.noDuplicates,
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formats: const [
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BarcodeFormat.ean13,
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BarcodeFormat.ean8,
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BarcodeFormat.upcA,
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BarcodeFormat.upcE,
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BarcodeFormat.code128,
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],
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);
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final _off = OpenFoodFactsService();
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final _repo = ProduitRepository.instance;
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bool _traite = false;
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// La caméra est démarrée/arrêtée automatiquement par le widget MobileScanner
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// quand il est monté/démonté selon l'onglet actif (autoStart). On ne fait
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// AUCUN start()/stop() manuel ici : ça provoquerait un double démarrage.
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@override
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void didUpdateWidget(covariant ScanScreen old) {
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super.didUpdateWidget(old);
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// En revenant sur l'onglet Scanner, on réautorise la détection.
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if (widget.active && !old.active) _traite = false;
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}
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@override
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void dispose() {
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_controller.dispose();
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super.dispose();
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}
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Future<void> _onDetect(BarcodeCapture capture) async {
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if (_traite || !widget.active) return;
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final code = capture.barcodes.firstOrNull?.rawValue;
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if (code == null || code.isEmpty) return;
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// On bloque les détections suivantes pendant le traitement (sans couper la caméra).
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setState(() => _traite = true);
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// Déjà connu ? → on ouvre directement la fiche.
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final existant = _repo.parCodeBarres(code);
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if (existant != null) {
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await _ouvrirExistant(existant);
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return;
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}
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// Sinon on interroge OpenFoodFacts (avec un petit loader).
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final info = await _off.chercherParCodeBarres(code);
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if (!mounted) return;
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final ajoute = await Navigator.of(context).push<bool>(
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MaterialPageRoute(
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builder: (_) => ProduitEditScreen(
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codeBarresInitial: code,
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nomInitial: info?.nom,
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imageUrlInitial: info?.imageUrl,
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quantiteInitial: info?.quantite,
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uniteInitial: info?.unite,
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),
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),
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);
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if (mounted) {
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setState(() => _traite = false);
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if (ajoute == true) await _popupAjoute();
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}
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}
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Future<void> _ouvrirExistant(Produit p) async {
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await Navigator.of(context).push(
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MaterialPageRoute(builder: (_) => ProduitEditScreen(produit: p)),
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);
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if (mounted) setState(() => _traite = false);
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}
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/// Ajout manuel via le bouton « + » (sans scanner).
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Future<void> _ajouterManuel() async {
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setState(() => _traite = true); // bloque les détections pendant la saisie
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final ajoute = await Navigator.of(context).push<bool>(
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MaterialPageRoute(builder: (_) => const ProduitEditScreen()),
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);
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if (mounted) {
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setState(() => _traite = false);
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if (ajoute == true) await _popupAjoute();
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}
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}
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/// Pop-up de confirmation « Produit ajouté », se ferme tout seul.
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Future<void> _popupAjoute() async {
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await showDialog<void>(
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context: context,
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barrierDismissible: true,
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builder: (ctx) {
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final nav = Navigator.of(ctx);
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Future.delayed(const Duration(milliseconds: 1300), () {
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if (nav.canPop()) nav.pop();
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});
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return Dialog(
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shape:
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RoundedRectangleBorder(borderRadius: BorderRadius.circular(20)),
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child: Padding(
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padding: const EdgeInsets.symmetric(vertical: 28, horizontal: 24),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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Container(
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padding: const EdgeInsets.all(14),
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decoration: BoxDecoration(
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color: Colors.green.withValues(alpha: 0.12),
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shape: BoxShape.circle,
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),
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child: const Icon(Icons.check_circle,
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color: Colors.green, size: 44),
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),
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const SizedBox(height: 16),
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const Text('Produit ajouté',
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style:
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TextStyle(fontSize: 18, fontWeight: FontWeight.w700)),
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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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@override
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Widget build(BuildContext context) {
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// La caméra (et donc la demande d'autorisation) n'est construite que
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// lorsque l'onglet Scanner est réellement affiché.
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if (!widget.active) {
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return const ColoredBox(color: Colors.black);
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}
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return Scaffold(
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backgroundColor: Colors.black,
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floatingActionButton: FloatingActionButton.extended(
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onPressed: _traite ? null : _ajouterManuel,
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backgroundColor: Colors.white,
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foregroundColor: AppTheme.noir,
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icon: const Icon(Icons.add),
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label: const Text('Ajout manuel'),
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),
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body: Stack(
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fit: StackFit.expand,
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children: [
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MobileScanner(
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controller: _controller,
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onDetect: _onDetect,
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errorBuilder: (context, error) => _erreurCamera(error),
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),
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_cadre(),
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_bandeauHaut(),
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if (_traite)
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Container(
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color: Colors.black54,
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child: const Center(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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CircularProgressIndicator(color: Colors.white),
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SizedBox(height: 16),
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Text('Recherche du produit…',
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style: TextStyle(color: Colors.white, fontSize: 16)),
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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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}
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Widget _bandeauHaut() {
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return SafeArea(
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child: Align(
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alignment: Alignment.topCenter,
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child: Container(
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margin: const EdgeInsets.only(top: 24),
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padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 12),
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decoration: BoxDecoration(
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color: Colors.black.withValues(alpha: 0.55),
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borderRadius: BorderRadius.circular(30),
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),
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child: const Text(
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'Vise le code-barres du produit',
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style: TextStyle(
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color: Colors.white,
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fontSize: 15,
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fontWeight: FontWeight.w600),
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),
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),
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),
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);
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}
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Widget _cadre() {
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return Center(
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child: Container(
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width: 260,
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height: 170,
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decoration: BoxDecoration(
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border: Border.all(color: AppTheme.accent, width: 3),
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borderRadius: BorderRadius.circular(20),
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),
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),
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);
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}
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Widget _erreurCamera(MobileScannerException error) {
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return Center(
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child: Padding(
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padding: const EdgeInsets.all(32),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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const Icon(Icons.no_photography_outlined,
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color: Colors.white70, size: 56),
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const SizedBox(height: 16),
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const Text(
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'Accès à la caméra impossible.\nAutorise la caméra dans les réglages.',
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textAlign: TextAlign.center,
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style: TextStyle(color: Colors.white70, fontSize: 15),
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),
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const SizedBox(height: 20),
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FilledButton(
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onPressed: () => _controller.start(),
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child: const Text('Réessayer'),
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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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