FEATURE download a document pdf file without uploading it to server

lib/core/navigation/push_routes.dart

@@ -347,6 +347,7 @@ Future<DocumentUploadResult?> pushDocumentUploadPreparationPage(
           create: (_) => DocumentUploadCubit(
             context.read(),
             context.read(),
+            context.read(),
           ),
           child: DocumentUploadPreparationPage(
             fileBytes: bytes,

lib/features/document_upload/cubit/document_upload_cubit.dart

@@ -5,6 +5,8 @@ import 'package:equatable/equatable.dart';
 import 'package:flutter/foundation.dart';
 import 'package:paperless_api/paperless_api.dart';
 import 'package:paperless_mobile/core/repository/label_repository.dart';
+import 'package:paperless_mobile/features/notifications/services/local_notification_service.dart';
+import 'package:paperless_mobile/core/service/file_service.dart';
 
 part 'document_upload_state.dart';
 
@@ -13,7 +15,9 @@ class DocumentUploadCubit extends Cubit<DocumentUploadState> {
 
   final LabelRepository _labelRepository;
 
-  DocumentUploadCubit(this._labelRepository, this._documentApi)
+  final LocalNotificationService _notificationService;
+
+  DocumentUploadCubit(this._labelRepository, this._documentApi, this._notificationService)
       : super(const DocumentUploadState()) {
     _labelRepository.addListener(
       this,
@@ -49,6 +53,18 @@ class DocumentUploadCubit extends Cubit<DocumentUploadState> {
     );
   }
 
+  Future<void> saveLocally(
+      Uint8List bytes, String fileName, String preferredLocaleSubtag
+      ) async {
+    var file = await FileService.saveToFile(bytes, fileName);
+    _notificationService.notifyFileSaved(
+      filename: fileName,
+      filePath: file.path,
+      finished: true,
+      locale: preferredLocaleSubtag,
+    );
+  }
+
   @override
   Future<void> close() async {
     _labelRepository.removeListener(this);

lib/features/document_upload/view/document_upload_preparation_page.dart

@@ -1,12 +1,17 @@
+import 'dart:io';
 import 'dart:typed_data';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_form_builder/flutter_form_builder.dart';
+import 'package:hive/hive.dart';
 
 import 'package:intl/date_symbol_data_local.dart';
 import 'package:intl/intl.dart';
 import 'package:paperless_api/paperless_api.dart';
+import 'package:paperless_mobile/constants.dart';
+import 'package:paperless_mobile/core/config/hive/hive_config.dart';
+import 'package:paperless_mobile/core/database/tables/global_settings.dart';
 import 'package:paperless_mobile/core/database/tables/local_user_account.dart';
 import 'package:paperless_mobile/core/repository/label_repository.dart';
 import 'package:paperless_mobile/core/type/types.dart';
@@ -19,6 +24,8 @@ import 'package:paperless_mobile/features/labels/view/widgets/label_form_field.d
 import 'package:paperless_mobile/generated/l10n/app_localizations.dart';
 
 import 'package:paperless_mobile/helpers/message_helpers.dart';
+import 'package:paperless_mobile/helpers/permission_helpers.dart';
+import 'package:permission_handler/permission_handler.dart';
 
 class DocumentUploadResult {
   final bool success;
@@ -75,6 +82,8 @@ class _DocumentUploadPreparationPageState extends State<DocumentUploadPreparatio
                 child: LinearProgressIndicator(), preferredSize: Size.fromHeight(4.0))
             : null,
       ),
+      bottomNavigationBar: _buildBottomAppBar(),
+      floatingActionButtonLocation: FloatingActionButtonLocation.endDocked,
       floatingActionButton: Visibility(
         visible: MediaQuery.of(context).viewInsets.bottom == 0,
         child: FloatingActionButton.extended(
@@ -291,6 +300,30 @@ class _DocumentUploadPreparationPageState extends State<DocumentUploadPreparatio
     }
   }
 
+  BlocBuilder<DocumentUploadCubit, DocumentUploadState> _buildBottomAppBar() {
+    return BlocBuilder<DocumentUploadCubit, DocumentUploadState>(
+      builder: (context, state) {
+        return BottomAppBar(
+          child: BlocBuilder<DocumentUploadCubit, DocumentUploadState>(
+            builder: (context, connectivityState) {
+              return Row(
+                mainAxisAlignment: MainAxisAlignment.start,
+                children: [
+                  IconButton(
+                    tooltip: "Save a local copy",
+                    icon: const Icon(Icons.download),
+                    onPressed: () => _onLocalSave(),
+                  ).paddedOnly(right: 4.0),
+                ],
+              );
+            },
+          ),
+        );
+      },
+    );
+  }
+
+
   String _padWithExtension(String source, [String? extension]) {
     final ext = extension ?? '.pdf';
     return source.endsWith(ext) ? source : '$source$ext';
@@ -299,4 +332,27 @@ class _DocumentUploadPreparationPageState extends State<DocumentUploadPreparatio
   String _formatFilename(String source) {
     return source.replaceAll(RegExp(r"[\W_]"), "_").toLowerCase();
   }
+
+  Future<void> _onLocalSave() async {
+    final cubit = context.read<DocumentUploadCubit>();
+
+    try {
+      final globalSettings = Hive.box<GlobalSettings>(HiveBoxes.globalSettings).getValue()!;
+      if (Platform.isAndroid && androidInfo!.version.sdkInt <= 29) {
+        final isGranted = await askForPermission(Permission.storage);
+        if (!isGranted) {
+          return;
+          //TODO: Ask user to grant permissions
+        }
+      }
+      final title = (_formKey.currentState?.fields[fkFileName]?.value ?? widget.filename) as String;
+
+      var fileName = "$title.${widget.fileExtension}";
+
+      await cubit.saveLocally(widget.fileBytes, fileName, globalSettings.preferredLocaleSubtag);
+    } catch (error) {
+      showGenericError(context, error);
+    }
+  }
+
 }

lib/features/notifications/services/local_notification_service.dart

@@ -90,6 +90,50 @@ class LocalNotificationService {
     ); //TODO: INTL
   }
 
+  Future<void> notifyFileSaved({
+    required String filename,
+    required String filePath,
+    required bool finished,
+    required String locale,
+  }) async {
+    final tr = await S.delegate.load(Locale(locale));
+
+    await _plugin.show(
+      filePath.hashCode,
+      filename,
+      finished
+          ? tr.notificationDownloadComplete
+          : tr.notificationDownloadingDocument,
+      NotificationDetails(
+        android: AndroidNotificationDetails(
+          NotificationChannel.documentDownload.id + "_$filename",
+          NotificationChannel.documentDownload.name,
+          ongoing: !finished,
+          indeterminate: true,
+          importance: Importance.max,
+          priority: Priority.high,
+          showProgress: !finished,
+          when: DateTime.now().millisecondsSinceEpoch,
+          category: AndroidNotificationCategory.progress,
+          icon: finished ? 'file_download_done' : 'downloading',
+        ),
+        iOS: DarwinNotificationDetails(
+          attachments: [
+            DarwinNotificationAttachment(
+              filePath,
+            ),
+          ],
+        ),
+      ),
+      payload: jsonEncode(
+        OpenDownloadedDocumentPayload(
+          filePath: filePath,
+        ).toJson(),
+      ),
+    ); //TODO: INTL
+  }
+
+
   //TODO: INTL
   Future<void> notifyTaskChanged(Task task) {
     log("[LocalNotificationService] notifyTaskChanged: ${task.toString()}");

packages/mock_server/pubspec.yaml

@@ -13,7 +13,7 @@ dependencies:
   logging: ^1.1.1
   flutter:
     sdk: flutter
-  http: ^0.13.4
+  http: ^0.13.5
 
 dev_dependencies:
   flutter_test: