fix: file transfer, confirm, remember

Signed-off-by: fufesou <linlong1266.gmail.com>

src/fs.rs

@@ -701,18 +701,17 @@ impl TransferJob {
         }
     }
 
-    pub async fn read(&mut self, stream: &mut Stream) -> ResultType<Option<FileTransferBlock>> {
+    async fn init_data_stream(&mut self, stream: &mut crate::Stream) -> ResultType<()> {
         let file_num = self.file_num as usize;
-        let name: &str;
         match &mut self.data_source {
             DataSource::FilePath(p) => {
                 if file_num >= self.files.len() {
+                    // job done
                     self.data_stream.take();
-                    return Ok(None);
+                    return Ok(());
                 };
-                name = &self.files[file_num].name;
                 if self.data_stream.is_none() {
-                    match File::open(Self::join(p, name)).await {
+                    match File::open(Self::join(p, &self.files[file_num].name)).await {
                         Ok(file) => {
                             self.data_stream = Some(DataStream::FileStream(file));
                             self.file_confirmed = false;
@@ -728,7 +727,6 @@ impl TransferJob {
                 }
             }
             DataSource::MemoryCursor(c) => {
-                name = "";
                 if self.data_stream.is_none() {
                     let mut t = std::io::Cursor::new(Vec::new());
                     std::mem::swap(&mut t, c);
@@ -742,9 +740,32 @@ impl TransferJob {
                     self.send_current_digest(stream).await?;
                     self.set_file_is_waiting(true);
                 }
+            }
+        }
+        Ok(())
+    }
+
+    pub async fn read(&mut self) -> ResultType<Option<FileTransferBlock>> {
+        if self.r#type == JobType::Generic {
+            if self.enable_overwrite_detection && !self.file_confirmed() {
                 return Ok(None);
             }
         }
+
+        let file_num = self.file_num as usize;
+        let name: &str;
+        match &mut self.data_source {
+            DataSource::FilePath(..) => {
+                if file_num >= self.files.len() {
+                    self.data_stream.take();
+                    return Ok(None);
+                };
+                name = &self.files[file_num].name;
+            }
+            DataSource::MemoryCursor(..) => {
+                name = "";
+            }
+        }
         const BUF_SIZE: usize = 128 * 1024;
         let mut buf: Vec<u8> = vec![0; BUF_SIZE];
         let mut compressed = false;
@@ -953,6 +974,11 @@ impl TransferJob {
 
     pub async fn confirm(&mut self, r: &FileTransferSendConfirmRequest) -> bool {
         if self.file_num() != r.file_num {
+            // This branch will always be hit if:
+            // 1. `confirm()` is called in `ui_cm_interface.rs`
+            // 2. Not resuming
+            //
+            // It is ok. Because `confirm()` in `ui_cm_interface.rs` is only used for resuming.
             log::info!("file num truncated, ignoring");
         } else {
             match r.union {
@@ -1112,17 +1138,33 @@ pub fn get_job_immutable(id: i32, jobs: &[TransferJob]) -> Option<&TransferJob>
     jobs.iter().find(|x| x.id() == id)
 }
 
+async fn init_jobs(jobs: &mut Vec<TransferJob>, stream: &mut crate::Stream) -> ResultType<()> {
+    for job in jobs.iter_mut() {
+        if job.is_last_job {
+            continue;
+        }
+        if let Err(err) = job.init_data_stream(stream).await {
+            stream
+                .send(&new_error(job.id(), err, job.file_num()))
+                .await?;
+        }
+    }
+    Ok(())
+}
+
 pub async fn handle_read_jobs(
     jobs: &mut Vec<TransferJob>,
     stream: &mut crate::Stream,
 ) -> ResultType<String> {
+    init_jobs(jobs, stream).await?;
+
     let mut job_log = Default::default();
     let mut finished = Vec::new();
     for job in jobs.iter_mut() {
         if job.is_last_job {
             continue;
         }
-        match job.read(stream).await {
+        match job.read().await {
             Err(err) => {
                 stream
                     .send(&new_error(job.id(), err, job.file_num()))