feat: don't block bot startup waiting to initialize vcs

src/main.rs

@@ -285,14 +285,14 @@ async fn main() -> Result<(), MainError> {
     let discord_opt_in_command_name = discord_opt_in_command.name.into();
     let discord_opt_out_command_name = discord_opt_out_command.name.into();
 
-    let vcs = initialize_vcs(&discord_client).await;
-
     let command_router = CommandRouter::from_iter(commands);
     let command_router = Arc::new(command_router);
 
     let discord_client = Arc::new(discord_client);
     let songbird = Arc::new(songbird);
-    let vcs_sender = VCsSender::new(vcs);
+    let vcs_sender = VCsSender::new(Default::default());
+
+    let initializing_vcs = initialize_vcs(&vcs_sender, &discord_client);
 
     let bot_data = bot_data.into_inner();
     let recording_data = recording_data.into_inner();
@@ -327,7 +327,7 @@ async fn main() -> Result<(), MainError> {
         cancellation_token: cancellation_token.clone(),
         discord_application_id,
         discord_bot_owner_user_id,
-        discord_client,
+        discord_client: discord_client.clone(),
         discord_info_command_id,
         discord_info_command_name,
         discord_opt_in_command_id,
@@ -340,7 +340,7 @@ async fn main() -> Result<(), MainError> {
         render_manager,
         songbird,
         user_manager,
-        vcs_sender,
+        vcs_sender: vcs_sender.clone(),
     };
 
     let heat_seeking = tokio::spawn(heat_seek(state.clone()));
@@ -394,6 +394,7 @@ async fn main() -> Result<(), MainError> {
     });
 
     let finished_naturally = async move {
+        initializing_vcs.await;
         heat_seeking.await.unwrap();
         run_shards.await;
     };

src/track_vcs.rs

@@ -20,17 +20,19 @@ pub type VCsInGuild =
 pub type VCs = BTreeMap<Id<GuildMarker>, VCsInGuild>;
 pub type VCsSender = watch::Sender<VCs>;
 
-#[tracing::instrument(skip(discord_client), ret)]
+#[tracing::instrument(skip(vcs_sender, discord_client))]
 async fn initialize_user_in_vc(
+    vcs_sender: &VCsSender,
     discord_client: &twilight_http::Client,
     guild_id: Id<GuildMarker>,
     user_id: Id<UserMarker>,
-) -> Option<(Id<ChannelMarker>, UserInVCData)> {
+) {
     if let Ok(voice_state_res) = discord_client.user_voice_state(guild_id, user_id).await
         && let Ok(voice_state) = voice_state_res.model().await
     {
         tracing::info!(?user_id, ?voice_state);
 
+        if let Some(voice_channel_id) = voice_state.channel_id {
             let voice_status = VoiceStatus::builder()
                 .self_deafened(voice_state.self_deaf)
                 .self_muted(voice_state.self_mute)
@@ -41,55 +43,46 @@ async fn initialize_user_in_vc(
                 .build();
             let user_in_vc_data = voice_status.into();
 
-        voice_state
+            vcs_sender.send_modify(|vcs| {
-            .channel_id
+                vcs.entry(guild_id)
-            .map(|channel_id| (channel_id, user_in_vc_data))
+                    .or_default()
-    } else {
+                    .insert(voice_channel_id, user_id, user_in_vc_data);
-        None // TODO
+            });
+        }
     }
 }
 
-#[tracing::instrument(skip(discord_client), ret)]
+#[tracing::instrument(skip(vcs_sender, discord_client))]
 async fn initialize_server_vcs(
+    vcs_sender: &VCsSender,
     discord_client: &twilight_http::Client,
     id: Id<GuildMarker>,
-) -> VCsInGuild {
+) {
     if let Ok(guild_members_res) = discord_client.guild_members(id).limit(999).await
         && let Ok(guild_members) = guild_members_res.model().await
     {
-        FuturesUnordered::from_iter(guild_members.into_iter().map(|member| async move {
+        FuturesUnordered::from_iter(
-            (
+            guild_members.into_iter().map(|member| {
-                member.user.id,
+                initialize_user_in_vc(vcs_sender, discord_client, id, member.user.id)
-                initialize_user_in_vc(discord_client, id, member.user.id).await,
+            }),
-            )
-        }))
-        .filter_map(
-            |(user_id, channel_id_and_user_in_vc_data_option)| async move {
-                channel_id_and_user_in_vc_data_option
-                    .map(|(channel_id, user_in_vc_data)| (channel_id, user_id, user_in_vc_data))
-            },
         )
         .collect()
         .await
-    } else {
-        Default::default()
     }
 }
 
 #[tracing::instrument(skip(discord_client), ret)]
-pub async fn initialize_vcs(discord_client: &twilight_http::Client) -> VCs {
+pub async fn initialize_vcs(vcs_sender: &VCsSender, discord_client: &twilight_http::Client) {
     if let Ok(guilds_res) = discord_client.current_user_guilds().limit(200).await
         && let Ok(guilds) = guilds_res.model().await
     {
-        FuturesUnordered::from_iter(guilds.into_iter().map(|guild| async move {
+        FuturesUnordered::from_iter(
-            let guild_vcs = initialize_server_vcs(discord_client, guild.id).await;
+            guilds
-
+                .into_iter()
-            (guild.id, guild_vcs)
+                .map(|guild| initialize_server_vcs(vcs_sender, discord_client, guild.id)),
-        }))
+        )
         .collect()
         .await
-    } else {
-        Default::default()
     }
 }