337 lines
11 KiB
Dart
337 lines
11 KiB
Dart
import 'dart:typed_data';
|
|
import 'package:flutter/services.dart';
|
|
import 'package:pdf/pdf.dart';
|
|
import 'package:pdf/widgets.dart' as pw;
|
|
import 'package:em2rp/services/qr_code_service.dart';
|
|
|
|
/// Formats d'étiquettes QR disponibles
|
|
enum QRLabelFormat { small, medium, large }
|
|
|
|
/// Configuration pour la génération de PDF
|
|
class PDFGeneratorConfig {
|
|
final double qrCodeSize;
|
|
final int itemsPerPage;
|
|
final bool withProgress;
|
|
|
|
const PDFGeneratorConfig({
|
|
required this.qrCodeSize,
|
|
required this.itemsPerPage,
|
|
this.withProgress = false,
|
|
});
|
|
|
|
static const small = PDFGeneratorConfig(
|
|
qrCodeSize: 150,
|
|
itemsPerPage: 50,
|
|
);
|
|
|
|
static const medium = PDFGeneratorConfig(
|
|
qrCodeSize: 250,
|
|
itemsPerPage: 20,
|
|
);
|
|
|
|
static const large = PDFGeneratorConfig(
|
|
qrCodeSize: 300,
|
|
itemsPerPage: 12,
|
|
);
|
|
|
|
static PDFGeneratorConfig fromFormat(QRLabelFormat format) {
|
|
switch (format) {
|
|
case QRLabelFormat.small:
|
|
return small;
|
|
case QRLabelFormat.medium:
|
|
return medium;
|
|
case QRLabelFormat.large:
|
|
return large;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Service UNIQUE et optimisé pour la génération de PDFs avec QR codes
|
|
/// Remplace PDFGeneratorService, ContainerPDFGeneratorService et UnifiedPDFGeneratorService
|
|
class PDFService {
|
|
static Uint8List? _cachedLogoBytes;
|
|
static bool _logoLoadAttempted = false;
|
|
|
|
/// Charge le logo en cache une seule fois
|
|
static Future<void> _ensureLogoLoaded() async {
|
|
if (_logoLoadAttempted) return;
|
|
_logoLoadAttempted = true;
|
|
|
|
try {
|
|
final logoData = await rootBundle.load('assets/logos/LowQRectangleLogoBlack.png');
|
|
_cachedLogoBytes = logoData.buffer.asUint8List();
|
|
} catch (e) {
|
|
_cachedLogoBytes = Uint8List(0);
|
|
}
|
|
}
|
|
|
|
/// Tronque un texte
|
|
static String _truncate(String text, int max) {
|
|
return text.length <= max ? text : '${text.substring(0, max - 3)}...';
|
|
}
|
|
|
|
/// Génère un PDF avec QR codes pour n'importe quel type d'objet
|
|
///
|
|
/// [items] : Liste des objets à générer
|
|
/// [format] : Format des étiquettes (small, medium, large)
|
|
/// [getId] : Fonction pour obtenir l'ID unique
|
|
/// [getTitle] : Fonction pour obtenir le titre (optionnel)
|
|
/// [getDetails] : Fonction pour obtenir les détails (optionnel, seulement pour large)
|
|
/// [onProgress] : Callback de progression (optionnel)
|
|
static Future<Uint8List> generatePDF<T>({
|
|
required List<T> items,
|
|
required QRLabelFormat format,
|
|
required String Function(T) getId,
|
|
String Function(T)? getTitle,
|
|
List<String> Function(T)? getDetails,
|
|
Function(int current, int total)? onProgress,
|
|
}) async {
|
|
if (items.isEmpty) {
|
|
throw Exception('La liste d\'items est vide');
|
|
}
|
|
|
|
final config = PDFGeneratorConfig.fromFormat(format);
|
|
final pdf = pw.Document();
|
|
|
|
// Pré-charger le logo pour format large
|
|
if (format == QRLabelFormat.large) {
|
|
await _ensureLogoLoaded();
|
|
}
|
|
|
|
// Générer tous les QR codes en bulk avec progression
|
|
final allQRImages = await QRCodeService.generateBulkQRCodes(
|
|
items.map((item) => getId(item)).toList(),
|
|
size: config.qrCodeSize,
|
|
withLogo: false,
|
|
useCache: true,
|
|
onProgress: onProgress,
|
|
);
|
|
|
|
// Générer les pages
|
|
switch (format) {
|
|
case QRLabelFormat.small:
|
|
_addSmallLabels(pdf, items, getId, allQRImages, config);
|
|
break;
|
|
case QRLabelFormat.medium:
|
|
_addMediumLabels(pdf, items, getId, getTitle, allQRImages, config);
|
|
break;
|
|
case QRLabelFormat.large:
|
|
_addLargeLabels(pdf, items, getId, getTitle, getDetails, allQRImages, config);
|
|
break;
|
|
}
|
|
|
|
return pdf.save();
|
|
}
|
|
|
|
// ========================================================================
|
|
// PETITS LABELS (2x2 cm, 20 par page)
|
|
// ========================================================================
|
|
static void _addSmallLabels<T>(
|
|
pw.Document pdf,
|
|
List<T> items,
|
|
String Function(T) getId,
|
|
List<Uint8List> qrImages,
|
|
PDFGeneratorConfig config,
|
|
) {
|
|
const qrSize = 56.69; // 2cm
|
|
|
|
for (int pageStart = 0; pageStart < items.length; pageStart += config.itemsPerPage) {
|
|
final pageItems = items.skip(pageStart).take(config.itemsPerPage).toList();
|
|
final pageQRs = qrImages.skip(pageStart).take(config.itemsPerPage).toList();
|
|
|
|
pdf.addPage(
|
|
pw.Page(
|
|
pageFormat: PdfPageFormat.a4,
|
|
margin: const pw.EdgeInsets.all(20),
|
|
build: (_) => pw.Wrap(
|
|
spacing: 10,
|
|
runSpacing: 10,
|
|
children: List.generate(pageItems.length, (i) {
|
|
return pw.Container(
|
|
width: qrSize,
|
|
height: qrSize + 20,
|
|
child: pw.Column(
|
|
mainAxisAlignment: pw.MainAxisAlignment.center,
|
|
children: [
|
|
pw.Image(pw.MemoryImage(pageQRs[i])),
|
|
pw.SizedBox(height: 2),
|
|
pw.Text(
|
|
getId(pageItems[i]),
|
|
style: pw.TextStyle(fontSize: 6, fontWeight: pw.FontWeight.bold),
|
|
textAlign: pw.TextAlign.center,
|
|
),
|
|
],
|
|
),
|
|
);
|
|
}),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
// ========================================================================
|
|
// LABELS MOYENS (4x4 cm, 6 par page)
|
|
// ========================================================================
|
|
static void _addMediumLabels<T>(
|
|
pw.Document pdf,
|
|
List<T> items,
|
|
String Function(T) getId,
|
|
String Function(T)? getTitle,
|
|
List<Uint8List> qrImages,
|
|
PDFGeneratorConfig config,
|
|
) {
|
|
const qrSize = 113.39; // 4cm
|
|
|
|
for (int pageStart = 0; pageStart < items.length; pageStart += config.itemsPerPage) {
|
|
final pageItems = items.skip(pageStart).take(config.itemsPerPage).toList();
|
|
final pageQRs = qrImages.skip(pageStart).take(config.itemsPerPage).toList();
|
|
|
|
pdf.addPage(
|
|
pw.Page(
|
|
pageFormat: PdfPageFormat.a4,
|
|
margin: const pw.EdgeInsets.all(20),
|
|
build: (_) => pw.Wrap(
|
|
spacing: 20,
|
|
runSpacing: 20,
|
|
children: List.generate(pageItems.length, (i) {
|
|
return pw.Container(
|
|
width: qrSize,
|
|
height: qrSize + 30,
|
|
child: pw.Column(
|
|
mainAxisAlignment: pw.MainAxisAlignment.center,
|
|
children: [
|
|
pw.Image(pw.MemoryImage(pageQRs[i])),
|
|
pw.SizedBox(height: 4),
|
|
pw.Text(
|
|
getId(pageItems[i]),
|
|
style: pw.TextStyle(fontSize: 10, fontWeight: pw.FontWeight.bold),
|
|
textAlign: pw.TextAlign.center,
|
|
),
|
|
if (getTitle != null) ...[
|
|
pw.SizedBox(height: 2),
|
|
pw.Text(
|
|
_truncate(getTitle(pageItems[i]), 25),
|
|
style: const pw.TextStyle(fontSize: 8, color: PdfColors.grey700),
|
|
textAlign: pw.TextAlign.center,
|
|
),
|
|
],
|
|
],
|
|
),
|
|
);
|
|
}),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
// ========================================================================
|
|
// GRANDS LABELS (avec détails, 10 par page)
|
|
// ========================================================================
|
|
static void _addLargeLabels<T>(
|
|
pw.Document pdf,
|
|
List<T> items,
|
|
String Function(T) getId,
|
|
String Function(T)? getTitle,
|
|
List<String> Function(T)? getDetails,
|
|
List<Uint8List> qrImages,
|
|
PDFGeneratorConfig config,
|
|
) {
|
|
const qrSize = 100.0;
|
|
|
|
for (int pageStart = 0; pageStart < items.length; pageStart += config.itemsPerPage) {
|
|
final pageItems = items.skip(pageStart).take(config.itemsPerPage).toList();
|
|
final pageQRs = qrImages.skip(pageStart).take(config.itemsPerPage).toList();
|
|
|
|
pdf.addPage(
|
|
pw.Page(
|
|
pageFormat: PdfPageFormat.a4,
|
|
margin: const pw.EdgeInsets.all(20),
|
|
build: (_) => pw.Wrap(
|
|
spacing: 10,
|
|
runSpacing: 10,
|
|
children: List.generate(pageItems.length, (i) {
|
|
final item = pageItems[i];
|
|
return pw.Container(
|
|
width: 260,
|
|
height: 120,
|
|
decoration: pw.BoxDecoration(
|
|
border: pw.Border.all(color: PdfColors.grey400),
|
|
borderRadius: pw.BorderRadius.circular(4),
|
|
),
|
|
padding: const pw.EdgeInsets.all(8),
|
|
child: pw.Row(
|
|
crossAxisAlignment: pw.CrossAxisAlignment.start,
|
|
children: [
|
|
// QR Code
|
|
pw.Container(
|
|
width: qrSize,
|
|
height: qrSize,
|
|
child: pw.Image(pw.MemoryImage(pageQRs[i])),
|
|
),
|
|
pw.SizedBox(width: 8),
|
|
// Détails
|
|
pw.Expanded(
|
|
child: pw.Column(
|
|
crossAxisAlignment: pw.CrossAxisAlignment.start,
|
|
children: [
|
|
// Logo
|
|
if (_cachedLogoBytes != null && _cachedLogoBytes!.isNotEmpty)
|
|
pw.Center(
|
|
child: pw.Container(
|
|
height: 25,
|
|
margin: const pw.EdgeInsets.only(bottom: 6),
|
|
child: pw.Image(pw.MemoryImage(_cachedLogoBytes!)),
|
|
),
|
|
),
|
|
// Titre
|
|
if (getTitle != null) ...[
|
|
pw.SizedBox(height: 2),
|
|
pw.Text(
|
|
_truncate(getTitle(item), 20),
|
|
style: pw.TextStyle(fontSize: 10, fontWeight: pw.FontWeight.bold),
|
|
maxLines: 2,
|
|
),
|
|
],
|
|
// ID
|
|
pw.SizedBox(height: 2),
|
|
pw.Text(
|
|
getId(item),
|
|
style: const pw.TextStyle(fontSize: 8, color: PdfColors.grey700),
|
|
maxLines: 1,
|
|
),
|
|
// Détails supplémentaires
|
|
if (getDetails != null) ...[
|
|
pw.SizedBox(height: 4),
|
|
...getDetails(item).take(5).map((line) {
|
|
return pw.Padding(
|
|
padding: const pw.EdgeInsets.only(bottom: 1),
|
|
child: pw.Text(
|
|
_truncate(line, 25),
|
|
style: const pw.TextStyle(fontSize: 6, color: PdfColors.grey800),
|
|
),
|
|
);
|
|
}),
|
|
],
|
|
],
|
|
),
|
|
),
|
|
],
|
|
),
|
|
);
|
|
}),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
/// Nettoie le cache (logo)
|
|
static void clearCache() {
|
|
_cachedLogoBytes = null;
|
|
_logoLoadAttempted = false;
|
|
}
|
|
}
|
|
|