isolaaaatesss and basic progress with it

lib/widgets/loading_overlay.dart

@@ -0,0 +1,83 @@
+import 'package:dartssh2/dartssh2.dart';
+import 'package:file_selector/file_selector.dart';
+import 'package:flutter/material.dart';
+
+class LoadingOverlay extends StatefulWidget{
+  const LoadingOverlay({
+    super.key, required this.sftpClient, required this.path, required this.files,
+  });
+
+  final SftpClient sftpClient;
+  final String path;
+  final List<XFile> files;
+
+  @override
+  State<LoadingOverlay> createState() => _LoadingOverlayState();
+}
+
+class _LoadingOverlayState extends State<LoadingOverlay> {
+
+  Future<void> uploadFiles() async {
+    for (final file in widget.files) {
+      final fileSize = await file.length();
+      final remoteFile = await widget.sftpClient.open(
+        '${widget.path}${file.name}',
+        mode: SftpFileOpenMode.create | SftpFileOpenMode.write | SftpFileOpenMode.exclusive
+      );
+      _loader = remoteFile.write(
+        file.openRead(),
+        onProgress: (progress) => setState(() => _progress = progress/fileSize)
+      );
+      await _loader?.done;
+    }
+  }
+  
+  @override
+  void initState() {
+    super.initState();
+    uploadFiles();
+    _loadingFileName = widget.files[0].name;
+  }
+  
+  SftpFileWriter? _loader;
+
+  late String _loadingFileName;
+  double _progress = 0;
+
+  @override
+  build(BuildContext context) {
+    return Align(
+      alignment: Alignment.bottomCenter,
+      child: Container(
+        color: Theme.of(context).colorScheme.secondaryContainer,
+        child: Padding(
+          padding: const EdgeInsets.all(10),
+          child: Column(
+            spacing: 10,
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              Row(
+                spacing: 10,
+                mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                children: [
+                  Text('Uploading file: $_loadingFileName', style: TextStyle(fontSize: 16),),
+                  TextButton(
+                    onPressed: () {
+                      if (_loader != null) {
+                        _loader!.abort();
+                        widget.sftpClient.remove('${widget.path}$_loadingFileName');
+                      }
+                    },
+                    child: Text('Cancel')
+                  ),
+                ],
+              ),
+              LinearProgressIndicator(value: _progress,)
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+