Allow for escaped commas in message

src/client.rs

@@ -42,6 +42,8 @@ impl Client {
         }
     }
     async fn handle_client_msg(&mut self, msg: Message) {
+        // HOST and JOIN are handled by the client to set up a connection
+        // TODO add id support for reconnecting users
         match msg.command.as_str() {
             "HOST" => {
                 let room_code = self.global_state.code_generator.lock().await.generate();
@@ -86,8 +88,9 @@ impl Client {
             }
         }
     }
-    async fn handle_server_msg(&mut self, _msg: Message) {
-        todo!();
+    async fn handle_server_msg(&mut self, msg: Message) {
+        // Forward the message via websocket
+        self.ws.send(msg).await.unwrap();
     }
 }
 

src/message.rs

@@ -22,23 +22,40 @@ pub enum Error {
 }
 
 impl Message {
+    // pub fn parse(text: String) -> Result<Message> {
+    //     let (command, mut tail) = text.split_once(":").ok_or(Error::BadParse)?;
+    //     let command = String::new(command.trim());
+    //     let args = vec![];
+    //     loop {
+    //         let tail = tail.trim_start();
+    //         if tail == "" {
+    //             break
+    //         }
+    //         else {
+    //             let mut escaped = true;
+    //             tail.find
+    //         }
+    //     };
+    // }
     pub fn parse(text: String) -> Result<Message> {
+        use regex::Regex;
         lazy_static! {
-            static ref RE: regex::Regex = regex::Regex::new(r"^([A-Z_]+):\s*(.*)").unwrap();
+            static ref RE: Regex = Regex::new(r"^([A-Z_]+):\s*(.*)").unwrap();
+            static ref ARGS_RE: Regex = Regex::new(r"((\\,|[^,])+)").unwrap();
         }
         match RE.captures(text.as_str()) {
             Some(captures) => {
                 if captures.len() < 3 {
                     Err(Error::BadParse)
                 } else {
-                    let command = captures.get(1).unwrap().as_str().to_string();
-                    let args = captures
-                        .get(2)
-                        .unwrap()
-                        .as_str()
-                        .split(',')
-                        .map(|s| s.trim().to_string())
-                        .collect();
+                    let command = captures[1].to_string();
+                    let args = &captures[2];
+                    let args = ARGS_RE.captures_iter(args).map(|captures| {
+                        captures[1]
+                            .replace("\\,", ",")
+                            .trim()
+                            .to_string()
+                    }).collect();
                     Ok(Message { command, args })
                 }
             }
@@ -117,9 +134,14 @@ mod test {
     use super::*;
     #[test]
     fn test_parse() -> Result<()> {
+        // Simple test
         let text = "COMMAND: arg1, arg2";
         let msg = Message::parse(text.to_string())?;
         assert_eq!(msg!(COMMAND, "arg1", "arg2"), msg);
+        // With backtick delimited arguments
+        let text = "COMMAND: arg1\\, comment, arg2";
+        let msg = Message::parse(text.to_string())?;
+        assert_eq!(msg!(COMMAND, "arg1, comment", "arg2"), msg);
         Ok(())
     }
     #[test]