Create empty dir on send files in local (#9993)

* feat: Add empty dirs on sendfiles

* Update connection.rs

---------

Co-authored-by: RustDesk <71636191+rustdesk@users.noreply.github.com>

libs/hbb_common/protos/message.proto

@@ -368,6 +368,16 @@ message ReadDir {
   bool include_hidden = 2;
 }
 
+message ReadEmptyDirs {
+  string path = 1;
+  bool include_hidden = 2;
+}
+
+message ReadEmptyDirsResponse {
+  string path = 1;
+  repeated FileDirectory empty_dirs = 2;
+}
+
 message ReadAllFiles {
   int32 id = 1;
   string path = 2;
@@ -392,6 +402,7 @@ message FileAction {
     FileTransferCancel cancel = 8;
     FileTransferSendConfirmRequest send_confirm = 9;
     FileRename rename = 10;
+    ReadEmptyDirs read_empty_dirs = 11;
   }
 }
 
@@ -404,6 +415,7 @@ message FileResponse {
     FileTransferError error = 3;
     FileTransferDone done = 4;
     FileTransferDigest digest = 5;
+    ReadEmptyDirsResponse empty_dirs = 6;
   }
 }
 

libs/hbb_common/src/fs.rs

@@ -185,6 +185,51 @@ pub fn get_recursive_files(path: &str, include_hidden: bool) -> ResultType<Vec<F
     read_dir_recursive(&get_path(path), &get_path(""), include_hidden)
 }
 
+fn read_empty_dirs_recursive(
+    path: &PathBuf,
+    prefix: &Path,
+    include_hidden: bool,
+) -> ResultType<Vec<FileDirectory>> {
+    let mut dirs = Vec::new();
+    if path.is_dir() {
+        // to-do: symbol link handling, cp the link rather than the content
+        // to-do: file mode, for unix
+        let fd = read_dir(path, include_hidden)?;
+        if fd.entries.is_empty() {
+            dirs.push(fd);
+        } else {
+            for entry in fd.entries.iter() {
+                match entry.entry_type.enum_value() {
+                    Ok(FileType::Dir) => {
+                        if let Ok(mut tmp) = read_empty_dirs_recursive(
+                            &path.join(&entry.name),
+                            &prefix.join(&entry.name),
+                            include_hidden,
+                        ) {
+                            for entry in tmp.drain(0..) {
+                                dirs.push(entry);
+                            }
+                        }
+                    }
+                    _ => {}
+                }
+            }
+        }
+        Ok(dirs)
+    } else if path.is_file() {
+        Ok(dirs)
+    } else {
+        bail!("Not exists");
+    }
+}
+
+pub fn get_empty_dirs_recursive(
+    path: &str,
+    include_hidden: bool,
+) -> ResultType<Vec<FileDirectory>> {
+    read_empty_dirs_recursive(&get_path(path), &get_path(""), include_hidden)
+}
+
 #[inline]
 pub fn is_file_exists(file_path: &str) -> bool {
     return Path::new(file_path).exists();