Performance upgrades, fixes for 2 issues

src/bot/commands/mod.rs

@@ -44,13 +44,32 @@ pub async fn respond_message(
   }
 }
 
+pub async fn defer_message(
+  ctx: &Context,
+  command: &ApplicationCommandInteraction,
+  ephemeral: bool,
+) {
+  if let Err(why) = command
+    .create_interaction_response(&ctx.http, |response| {
+      response
+        .kind(InteractionResponseType::DeferredChannelMessageWithSource)
+        .interaction_response_data(|message| message.ephemeral(ephemeral))
+    })
+    .await
+  {
+    error!("Error deferring message: {:?}", why);
+  }
+}
+
 pub type CommandOutput = Pin<Box<dyn Future<Output = ()> + Send>>;
 pub type CommandExecutor = fn(Context, ApplicationCommandInteraction) -> CommandOutput;
 
+#[derive(Clone)]
 pub struct CommandManager {
   commands: HashMap<String, CommandInfo>,
 }
 
+#[derive(Clone)]
 pub struct CommandInfo {
   pub name: String,
   pub executor: CommandExecutor,

src/bot/commands/music/join.rs

@@ -5,7 +5,7 @@ use serenity::{
 };
 
 use crate::{
-  bot::commands::{respond_message, CommandOutput},
+  bot::commands::{defer_message, respond_message, CommandOutput},
   session::manager::{SessionCreateError, SessionManager},
   utils::embed::{EmbedBuilder, Status},
 };
@@ -46,6 +46,7 @@ pub fn run(ctx: Context, command: ApplicationCommandInteraction) -> CommandOutpu
 
     // Check if another session is already active in this server
     let session_opt = session_manager.get_session(guild.id).await;
+
     if let Some(session) = &session_opt {
       if let Some(owner) = session.get_owner().await {
         let msg = if owner == command.user.id {
@@ -91,6 +92,8 @@ pub fn run(ctx: Context, command: ApplicationCommandInteraction) -> CommandOutpu
       return;
     }
 
+    defer_message(&ctx, &command, true).await;
+
     if let Some(session) = &session_opt {
       if let Err(why) = session.update_owner(&ctx, command.user.id).await {
         // Need to link first