feat: Add a proper file saver

assets/l10n/intl_en.arb

@@ -2471,5 +2471,22 @@
   "@yourOwnUsername": {
     "type": "text",
     "placeholders": {}
+  },
+  "saveFile": "Save file",
+  "@saveFile": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "saveFileToFolder": "Save file to this foler",
+  "@saveFileToFolder": {
+    "type": "text",
+    "placeholders": {}
+  },
+  "savedFileAs": "Saved file as {filename}",
+  "@savedFileAs": {
+    "type": "text",
+    "placeholders": {
+      "filename": {}
+    }
   }
 }

lib/pages/image_viewer.dart

@@ -24,8 +24,8 @@ class ImageViewerController extends State<ImageViewer> {
     VRouter.of(context).to('/rooms');
   }
 
-  /// Open this file with a system call.
-  void openFileAction() => widget.event.openFile(context);
+  /// Save this file with a system call.
+  void saveFileAction() => widget.event.saveFile(context);
 
   /// Go back if user swiped it away
   void onInteractionEnds(ScaleEndDetails endDetails) {

lib/pages/views/image_viewer_view.dart

@@ -31,7 +31,7 @@ class ImageViewerView extends StatelessWidget {
           ),
           IconButton(
             icon: Icon(Icons.download_outlined),
-            onPressed: controller.openFileAction,
+            onPressed: controller.saveFileAction,
             color: Colors.white,
             tooltip: L10n.of(context).downloadFile,
           ),

lib/utils/matrix_sdk_extensions.dart/event_extension.dart

@@ -6,12 +6,13 @@ import 'package:flutter_cache_manager/flutter_cache_manager.dart';
 import 'matrix_file_extension.dart';
 
 extension LocalizedBody on Event {
-  void openFile(BuildContext context) async {
+  void saveFile(BuildContext context) async {
     final matrixFile = await showFutureLoadingDialog(
       context: context,
       future: () => downloadAndDecryptAttachmentCached(),
     );
-    matrixFile.result?.open();
+
+    matrixFile.result?.save(context);
   }
 
   IconData get statusIcon {

lib/utils/matrix_sdk_extensions.dart/matrix_file_extension.dart

@@ -1,45 +1,53 @@
 import 'dart:io';
 
-import 'package:android_path_provider/android_path_provider.dart';
 import 'package:matrix/matrix.dart';
 import 'package:fluffychat/utils/platform_infos.dart';
-import 'package:flutter/foundation.dart';
-import 'package:open_file/open_file.dart';
-import 'package:path_provider/path_provider.dart';
-import 'package:universal_html/html.dart' as html;
-import 'package:mime_type/mime_type.dart';
+import 'package:flutter/material.dart';
 import 'package:permission_handler/permission_handler.dart';
+import 'package:file_picker_cross/file_picker_cross.dart';
+import 'package:filesystem_picker/filesystem_picker.dart';
+import 'package:flutter_gen/gen_l10n/l10n.dart';
 
 extension MatrixFileExtension on MatrixFile {
-  void open() async {
-    if (kIsWeb) {
-      final fileName = name.split('/').last;
-      final mimeType = mime(fileName);
-      final element = html.document.createElement('a');
-      element.setAttribute(
-          'href', html.Url.createObjectUrlFromBlob(html.Blob([bytes])));
-      element.setAttribute('target', '_blank');
-      element.setAttribute('rel', 'noopener');
-      element.setAttribute('download', fileName);
-      element.setAttribute('type', mimeType);
-      element.style.display = 'none';
-      html.document.body.append(element);
-      element.click();
-      element.remove();
+  void save(BuildContext context) async {
+    if (PlatformInfos.isMobile &&
+        !(await Permission.storage.request()).isGranted) return;
+    final fileName = name.split('/').last;
+    if (PlatformInfos.isAndroid) {
+      final path = await FilesystemPicker.open(
+        title: L10n.of(context).saveFile,
+        context: context,
+        rootDirectory: Directory('/sdcard/'),
+        fsType: FilesystemType.folder,
+        pickText: L10n.of(context).saveFileToFolder,
+        folderIconColor: Theme.of(context).primaryColor,
+        requestPermission: () async =>
+            await Permission.storage.request().isGranted,
+      );
+      if (path != null) {
+        // determine a unique filename
+        // somefile-number.extension, e.g. helloworld-1.txt
+        var file = File('$path/$fileName');
+        var i = 0;
+        var extension = '';
+        if (fileName.contains('.')) {
+          extension = fileName.substring(fileName.lastIndexOf('.'));
+        }
+        final fileNameWithoutExtension =
+            fileName.substring(0, fileName.lastIndexOf('.'));
+        while (await file.exists()) {
+          i++;
+          file = File('$path/$fileNameWithoutExtension-$i$extension');
+        }
+        await file.writeAsBytes(bytes);
+        ScaffoldMessenger.of(context).showSnackBar(SnackBar(
+            content:
+                Text(L10n.of(context).savedFileAs(file.path.split('/').last))));
+      }
     } else {
-      if (PlatformInfos.isMobile &&
-          !(await Permission.storage.request()).isGranted) return;
-      final downloadsDir = PlatformInfos.isDesktop
-          ? (await getDownloadsDirectory()).path
-          : Platform.isAndroid
-              ? (await AndroidPathProvider.downloadsPath)
-              : (await getApplicationDocumentsDirectory()).path;
-
-      final file = File(downloadsDir + '/' + name.split('/').last);
-      file.writeAsBytesSync(bytes);
-      await OpenFile.open(file.path);
+      final file = FilePickerCross(bytes);
+      await file.exportToStorage(fileName: fileName);
     }
-    return;
   }
 
   MatrixFile get detectFileType {

lib/widgets/event_content/message_download_content.dart

@@ -24,7 +24,7 @@ class MessageDownloadContent extends StatelessWidget {
               primary: Theme.of(context).scaffoldBackgroundColor,
               onPrimary: Theme.of(context).textTheme.bodyText1.color,
             ),
-            onPressed: () => event.openFile(context),
+            onPressed: () => event.saveFile(context),
             child: Row(
               mainAxisSize: MainAxisSize.min,
               children: [

pubspec.lock

@@ -29,13 +29,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.5.0"
-  android_path_provider:
-    dependency: "direct main"
-    description:
-      name: android_path_provider
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.1"
   animations:
     dependency: transitive
     description:
@@ -297,6 +290,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.0.2"
+  filesystem_picker:
+    dependency: "direct main"
+    description:
+      name: filesystem_picker
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.4"
   firebase_core:
     dependency: transitive
     description:
@@ -646,13 +646,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.0"
-  mime_type:
-    dependency: "direct main"
-    description:
-      name: mime_type
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.0"
   moor:
     dependency: transitive
     description:
@@ -704,13 +697,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.0"
-  open_file:
-    dependency: "direct main"
-    description:
-      name: open_file
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "3.2.1"
   open_noti_settings:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -9,7 +9,6 @@ environment:
 dependencies:
   adaptive_dialog: ^1.0.1
   adaptive_theme: ^2.2.0
-  android_path_provider: ^0.2.1
   audioplayers: ^0.19.1
   cached_network_image: ^3.0.0
   cupertino_icons: any
@@ -21,6 +20,7 @@ dependencies:
       url: https://gitlab.com/famedly/libraries/fcm_shared_isolate.git
       ref: main
   file_picker_cross: ^4.4.2
+  filesystem_picker: ^1.0.4
   flutter:
     sdk: flutter
   flutter_app_lock: ^1.5.0
@@ -42,12 +42,10 @@ dependencies:
   intl: any
   localstorage: ^4.0.0+1
   matrix: ^0.1.7
-  mime_type: ^1.0.0
   native_imaging:
     git:
       url: https://gitlab.com/famedly/libraries/native_imaging.git
       ref: master
-  open_file: ^3.2.1
   open_noti_settings: ^0.2.0
   package_info_plus: ^1.0.3
   path_provider: ^2.0.2