Add serde support for User struct.

Cargo.lock

@@ -1210,6 +1210,8 @@ dependencies = [
  "parking_lot 0.8.0",
  "rust-crypto",
  "rustc-serialize",
+ "serde",
+ "serde_json",
  "slab 0.2.0",
  "thiserror",
  "tokio 1.8.1",

proto/Cargo.toml

@@ -18,9 +18,13 @@ mio = "^0.6"
 parking_lot = "^0.8"
 rust-crypto = "^0.2.34"
 rustc-serialize = "^0.3.17"
+serde = { version = "1.0", features = ["derive"] }
 slab = "^0.2"
 thiserror = "^1.0"
 tokio = { version = "1", features = ["full"] }
 tokio-core = "^0.1"
 tokio-io = "^0.1"
 tokio-codec = "^0.1"
+
+[dev-dependencies]
+serde_json = "1.0"

proto/src/core/user.rs

@@ -1,5 +1,7 @@
 use std::io;
 
+use serde::{Deserialize, Serialize};
+
 use crate::core::value::{
   ValueDecode, ValueDecodeError, ValueDecoder, ValueEncode, ValueEncodeError,
   ValueEncoder,
@@ -23,6 +25,8 @@ const STATUS_ONLINE: u32 = 3;
   PartialOrd,
   RustcDecodable,
   RustcEncodable,
+  Serialize,
+  Deserialize,
 )]
 pub enum UserStatus {
   /// The user if offline.
@@ -90,7 +94,16 @@ impl ValueDecode for UserStatus {
 
 /// This structure contains the last known information about a fellow user.
 #[derive(
-  Clone, Debug, Eq, Ord, PartialEq, PartialOrd, RustcDecodable, RustcEncodable,
+  Clone,
+  Debug,
+  Eq,
+  Ord,
+  PartialEq,
+  PartialOrd,
+  RustcDecodable,
+  RustcEncodable,
+  Serialize,
+  Deserialize,
 )]
 pub struct User {
   /// The name of the user.
@@ -112,3 +125,40 @@ pub struct User {
   /// The user's country code.
   pub country: String,
 }
+
+#[cfg(test)]
+mod tests {
+  use super::{User, UserStatus};
+
+  #[test]
+  fn serialize_user_status() {
+    assert_eq!(
+      serde_json::to_string(&UserStatus::Offline).unwrap(),
+      r#""Offline""#
+    );
+  }
+
+  #[test]
+  fn serialize_user() {
+    assert_eq!(
+      serde_json::to_string(&User {
+        name: "karandeep".to_string(),
+        status: UserStatus::Online,
+        average_speed: 1,
+        num_downloads: 2,
+        unknown: 3,
+        num_files: 4,
+        num_folders: 5,
+        num_free_slots: 6,
+        country: "IN".to_string(),
+      })
+      .unwrap(),
+      [
+        r#"{"name":"karandeep","status":"Online","average_speed":1,"#,
+        r#""num_downloads":2,"unknown":3,"num_files":4,"num_folders":5,"#,
+        r#""num_free_slots":6,"country":"IN"}"#,
+      ]
+      .join("")
+    );
+  }
+}