feat(lib): carry audio attributes in browse and folder listings

A browse listed each file as a name and a size, so a searcher who saw a
bitrate in a search reply lost it the moment they opened the sharer's
files. Listings (codes 5 and 37) now carry each file's attributes the
way Nicotine+ sends them, as a SharedFileEntry with name, size and
attributes in place of the (name, size) pair; the CLI's browse record
gains bitrate and duration, and the daemon protocol moves to version 2
for the new listing shape.

soulseek-rs/src/daemon/proto/dto.rs

@@ -12,7 +12,8 @@ use soulseek_rs::types::{
 };
 use soulseek_rs::{
     DownloadStatus, File, RoomEvent, RoomInfo, SearchResult, SessionLoss,
-    SharedDirectory, UploadInfo, UploadStatus, UserInfo, UserMessage,
+    SharedDirectory, SharedFileEntry, UploadInfo, UploadStatus, UserInfo,
+    UserMessage,
 };
 use std::collections::HashMap;
 
@@ -553,15 +554,32 @@ impl From<UserInfoDto> for UserInfo {
 #[cfg_attr(test, derive(schemars::JsonSchema))]
 pub struct SharedDirectoryDto {
     pub name: String,
-    /// Basename and size; join with the directory to get a downloadable path.
-    pub files: Vec<(String, u64)>,
+    pub files: Vec<SharedFileEntryDto>,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Deserialize, Serialize)]
+#[cfg_attr(test, derive(schemars::JsonSchema))]
+pub struct SharedFileEntryDto {
+    /// Basename; join with the directory to get a downloadable path.
+    pub name: String,
+    pub size: u64,
+    /// `(code, value)` audio attributes the owner advertises.
+    pub attributes: Vec<(u32, u32)>,
 }
 
 impl From<&SharedDirectory> for SharedDirectoryDto {
     fn from(directory: &SharedDirectory) -> Self {
         Self {
             name: directory.name.clone(),
-            files: directory.files.clone(),
+            files: directory
+                .files
+                .iter()
+                .map(|file| SharedFileEntryDto {
+                    name: file.name.clone(),
+                    size: file.size,
+                    attributes: file.attributes.clone(),
+                })
+                .collect(),
         }
     }
 }
@@ -570,7 +588,15 @@ impl From<SharedDirectoryDto> for SharedDirectory {
     fn from(dto: SharedDirectoryDto) -> Self {
         Self {
             name: dto.name,
-            files: dto.files,
+            files: dto
+                .files
+                .into_iter()
+                .map(|file| SharedFileEntry {
+                    name: file.name,
+                    size: file.size,
+                    attributes: file.attributes,
+                })
+                .collect(),
         }
     }
 }

soulseek-rs/src/daemon/proto/mod.rs

@@ -13,7 +13,7 @@
 /// Bumped when a change would break a client written against the old shape.
 /// Sent in the `auth` reply so a mismatch is caught at connect time rather
 /// than as a confusing failure three calls later.
-pub const PROTOCOL_VERSION: u32 = 1;
+pub const PROTOCOL_VERSION: u32 = 2;
 
 /// The OpenRPC document, served by `rpc.discover` so a generator can point at
 /// a running daemon instead of needing this repository.
@@ -322,7 +322,11 @@ mod tests {
     fn a_shared_listing_survives_the_round_trip() {
         let directory = SharedDirectory {
             name: "@@x\\Music".into(),
-            files: vec![("a.mp3".into(), 4096)],
+            files: vec![soulseek_rs::SharedFileEntry {
+                name: "a.mp3".into(),
+                size: 4096,
+                attributes: vec![(0, 320)],
+            }],
         };
         let json = serde_json::to_string(&SharedDirectoryDto::from(&directory))
             .unwrap();