first commit

lib/Screens/barcode/barcode_preview.dart

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+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:pdf/pdf.dart';
+import 'package:printing/printing.dart';
+import 'package:pdf/widgets.dart' as pw;
+import 'dart:io';
+import 'package:flutter_easyloading/flutter_easyloading.dart';
+import 'package:mobile_pos/generated/l10n.dart' as lang;
+import 'package:path_provider/path_provider.dart';
+
+import 'package:permission_handler/permission_handler.dart';
+
+import '../../constant.dart';
+import '../../http_client/custome_http_client.dart';
+import '../../service/check_user_role_permission_provider.dart';
+
+class PdfPreviewScreen extends ConsumerStatefulWidget {
+  final pw.Document pdfDocument;
+
+  const PdfPreviewScreen({super.key, required this.pdfDocument});
+
+  @override
+  ConsumerState<PdfPreviewScreen> createState() => _PdfPreviewScreenState();
+}
+
+class _PdfPreviewScreenState extends ConsumerState<PdfPreviewScreen> {
+  Future<void> _saveBarcodeLabels(pw.Document doc) async {
+    if (Platform.isIOS) {
+      EasyLoading.show(status: lang.S.current.downloading);
+      final dir = await getApplicationDocumentsDirectory();
+      final file = File('${dir.path}/barcode_labels.pdf');
+      final byteData = await doc.save();
+      try {
+        await file.writeAsBytes(byteData.buffer.asUint8List(byteData.offsetInBytes, byteData.lengthInBytes));
+        EasyLoading.showSuccess(lang.S.current.downloadSuccessfulPleaseCheckYourDocumentFolder);
+      } on FileSystemException catch (err) {
+        EasyLoading.showError(err.message);
+      }
+    }
+
+    if (Platform.isAndroid) {
+      var status = await Permission.storage.status;
+      if (status != PermissionStatus.granted) {
+        status = await Permission.storage.request();
+      }
+
+      // Use the same condition as your working method
+      if (true) {
+        EasyLoading.show(status: lang.S.current.downloading);
+        const downloadsFolderPath = '/storage/emulated/0/Download/';
+        Directory dir = Directory(downloadsFolderPath);
+        var file = File('${dir.path}/barcode_labels.pdf');
+
+        // Exact same file conflict handling as your working method
+        for (var i = 1; i < 20; i++) {
+          if (await file.exists()) {
+            try {
+              await file.delete();
+              break;
+            } catch (e) {
+              if (e.toString().contains('Cannot delete file')) {
+                file = File('${file.path.replaceAll(RegExp(r'$$\d+$$?'), '').replaceAll('.pdf', '')}($i).pdf');
+              }
+            }
+          } else {
+            break;
+          }
+        }
+
+        try {
+          final byteData = await doc.save();
+          await file.writeAsBytes(byteData.buffer.asUint8List(byteData.offsetInBytes, byteData.lengthInBytes));
+          EasyLoading.dismiss();
+          EasyLoading.showSuccess(lang.S.current.downloadSuccessfulPleaseCheckYourDocumentFolder);
+        } on FileSystemException catch (err) {
+          EasyLoading.showError(err.message);
+        }
+      }
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final permissionService = PermissionService(ref);
+    return Scaffold(
+      backgroundColor: Colors.white,
+      appBar: AppBar(
+        centerTitle: true,
+        title: Text(
+          lang.S.of(context).printBarCode,
+        ),
+        backgroundColor: Colors.white,
+        elevation: 0.0,
+      ),
+      body: PdfPreview(
+        dynamicLayout: false,
+        actionBarTheme: PdfActionBarTheme(
+          backgroundColor: Colors.white,
+        ),
+        previewPageMargin: EdgeInsets.symmetric(horizontal: 16, vertical: 16),
+        initialPageFormat: PdfPageFormat.a4,
+        scrollViewDecoration: BoxDecoration(
+          color: Colors.grey.shade50,
+        ),
+        pdfPreviewPageDecoration: const BoxDecoration(
+          backgroundBlendMode: BlendMode.overlay,
+          color: Colors.white,
+        ),
+        useActions: false,
+        build: (format) => widget.pdfDocument.save(),
+      ),
+      bottomNavigationBar: Padding(
+        padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 16),
+        child: ElevatedButton.icon(
+          style: ElevatedButton.styleFrom(
+            shape: RoundedRectangleBorder(
+              borderRadius: BorderRadius.circular(8.0),
+            ),
+            backgroundColor: kMainColor,
+            minimumSize: const Size(double.maxFinite, 48),
+            textStyle: const TextStyle(
+              color: Colors.white,
+              fontSize: 18,
+              fontWeight: FontWeight.w600,
+            ),
+          ),
+          onPressed: () async {
+            if (!permissionService.hasPermission(Permit.barcodesCreate.value)) {
+              ScaffoldMessenger.of(context).showSnackBar(
+                SnackBar(
+                  backgroundColor: Colors.red,
+                  content: Text(lang.S.of(context).youDoNotHavePermissionToGenerateBarcode),
+                ),
+              );
+              return;
+            }
+            await _saveBarcodeLabels(widget.pdfDocument);
+            Navigator.of(context).pop();
+          },
+          icon: Icon(Icons.download),
+          label: Text(
+            lang.S.of(context).download,
+            style: Theme.of(context).textTheme.titleLarge?.copyWith(
+                  color: Colors.white,
+                  fontWeight: FontWeight.w600,
+                ),
+          ),
+        ),
+      ),
+    );
+  }
+}