Add support for /whois command

Add support for the /whois command using the raw_msg function on the
connection for the particular server.

Author: prateeknischal

crates/libtiny_client/src/lib.rs

@@ -161,6 +161,11 @@ impl Client {
         self.state.is_nick_accepted()
     }
 
+    /// Query the server for a nick to get more information about the user
+    pub fn whois(&mut self, nick: &str) {
+        self.raw_msg(&format!("WHOIS {}", nick));
+    }
+
     /// Send a message directly to the server. "\r\n" suffix is added by this method.
     pub fn raw_msg(&mut self, msg: &str) {
         self.msg_chan

crates/tiny/src/cmd.rs

@@ -97,7 +97,7 @@ fn find_client<'a>(clients: &'a mut Vec<Client>, serv_name: &str) -> Option<&'a
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
-static CMDS: [&Cmd; 9] = [
+static CMDS: [&Cmd; 10] = [
     &AWAY_CMD,
     &CLOSE_CMD,
     &CONNECT_CMD,
@@ -106,6 +106,7 @@ static CMDS: [&Cmd; 9] = [
     &MSG_CMD,
     &NAMES_CMD,
     &NICK_CMD,
+    &WHOIS_CMD,
     &HELP_CMD,
 ];
 
@@ -511,6 +512,47 @@ fn nick(args: CmdArgs) {
     }
 }
 
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+static WHOIS_CMD: Cmd = Cmd {
+    name: "whois",
+    cmd_fn: whois,
+    description: "whois lookup for a user",
+    usage: "`/whois <nick>`",
+};
+
+fn whois(args: CmdArgs) {
+    let CmdArgs {
+        args,
+        ui,
+        clients,
+        src,
+        ..
+    } = args;
+
+    let words: Vec<&str> = args.split_whitespace().collect();
+
+    // Allow lookup for only one user at a time
+    if let Some(client) = find_client(clients, src.serv_name()) {
+        match words.get(0) {
+            Some(word) => client.whois(&word),
+            None => {
+                ui.add_client_err_msg(
+                    &format!("Usage: {}", WHOIS_CMD.usage),
+                    &MsgTarget::CurrentTab,
+                );
+            }
+        };
+    } else {
+        ui.add_client_err_msg(
+            &format!("Usage: {}", WHOIS_CMD.usage),
+            &MsgTarget::CurrentTab,
+        );
+    }
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
 static HELP_CMD: Cmd = Cmd {
     name: "help",
     cmd_fn: help,