Merge pull request 'develop-fileDownload' (#92) from develop-fileDownload into develop

Reviewed-on: #92
Reviewed-by: Elias Müller <elias@elias-mueller.com>

lib/utils/FileSaver.dart

@@ -0,0 +1,23 @@
+import 'dart:io';
+
+import 'package:permission_handler/permission_handler.dart';
+
+// only tested on android!
+class FileSaver {
+  static Future<String> getExternalDocumentPath() async {
+    var permission = await Permission.storage.status;
+    if(!permission.isGranted) {
+      await Permission.storage.request();
+    }
+    var directory = Directory('/storage/emulated/0/Download');
+    final externalPath = directory.path;
+    await Directory(externalPath).create(recursive: true);
+    return externalPath;
+  }
+
+  static Future<File> writeBytes(List<int> bytes, String name) async {
+    final path = await getExternalDocumentPath();
+    var file = File('$path/$name');
+    return file.writeAsBytes(bytes);
+  }
+}

lib/widget/fileViewer.dart

@@ -9,6 +9,8 @@ import 'package:share_plus/share_plus.dart';
 import 'package:syncfusion_flutter_pdfviewer/pdfviewer.dart';
 
 import '../storage/base/settingsProvider.dart';
+import '../utils/FileSaver.dart';
+import 'infoDialog.dart';
 import 'placeholderView.dart';
 import 'sharePositionOrigin.dart';
 
@@ -21,6 +23,12 @@ class FileViewer extends StatefulWidget {
   State<FileViewer> createState() => _FileViewerState();
 }
 
+enum FileViewingActions {
+  openExternal,
+  share,
+  save
+}
+
 class _FileViewerState extends State<FileViewer> {
   PhotoViewController photoViewController = PhotoViewController();
 
@@ -38,22 +46,57 @@ class _FileViewerState extends State<FileViewer> {
     AppBar appbar({List actions = const []}) => AppBar(
         title: Text(widget.path.split('/').last),
         actions: [
-          IconButton(
-              onPressed: () => Navigator.of(context).push(
+          ...actions,
+          PopupMenuButton<FileViewingActions>(
+            onSelected: (value) async {
+              switch(value) {
+                case FileViewingActions.openExternal:
+                  Navigator.of(context).push(
                       MaterialPageRoute(builder: (context) => FileViewer(path: widget.path, openExternal: true))
-              ),
-              icon: const Icon(Icons.open_in_new)
-          ),
-          IconButton(
-            onPressed: () {
-              Share.shareXFiles(
-                  [XFile(widget.path)],
-                  sharePositionOrigin: SharePositionOrigin.get(context),
                   );
+                  break;
+                case FileViewingActions.share:
+                  SharePlus.instance.share(
+                      ShareParams(
+                          files: [XFile(widget.path)],
+                          sharePositionOrigin: SharePositionOrigin.get(context)
+                      )
+                  );
+                  break;
+                case FileViewingActions.save:
+                  await FileSaver.writeBytes(await File(widget.path).readAsBytes(), widget.path.split('/').last);
+                  if(!context.mounted) return;
+                  InfoDialog.show(context, 'Die Datei wurde im Downloads Ordner gespeichert.');
+                  break;
+              }
             },
-            icon: const Icon(Icons.share_outlined),
+            itemBuilder: (context) => <PopupMenuEntry<FileViewingActions>>[
+              const PopupMenuItem(
+                value: FileViewingActions.openExternal,
+                child: ListTile(
+                  leading: Icon(Icons.open_in_new),
+                  title: Text('Extern öffnen'),
+                  dense: true,
+                ),
+              ),
+              const PopupMenuItem(
+                value: FileViewingActions.share,
+                child: ListTile(
+                  leading: Icon(Icons.share_outlined),
+                  title: Text('Teilen'),
+                  dense: true,
+                ),
+              ),
+              if(Platform.isAndroid) const PopupMenuItem(
+                value: FileViewingActions.save,
+                child: ListTile(
+                  leading: Icon(Icons.save_alt_outlined),
+                  title: Text('Speichern'),
+                  dense: true,
+                ),
+              ),
+            ],
           ),
-          ...actions
         ],
       );
 

pubspec.yaml

@@ -64,6 +64,7 @@ dependencies:
   open_filex: ^4.7.0
   package_info_plus: ^8.1.3
   path_provider: ^2.1.5
+  permission_handler: ^12.0.1
   persistent_bottom_nav_bar_v2: ^6.1.0
   photo_view: ^0.15.0
   pretty_json: ^2.0.0