fix: use existing node if someone is already in the voice channel

crates/core/database/src/voice/voice_client.rs

@@ -42,6 +42,10 @@ impl VoiceClient {
         }
     }
 
+    pub fn is_enabled(&self) -> bool {
+        !self.rooms.is_empty()
+    }
+
     pub async fn from_revolt_config() -> Self {
         let config = config().await;
 
@@ -89,8 +93,7 @@ impl VoiceClient {
             Channel::TextChannel { voice: Some(voice), .. } => Some(Cow::Borrowed(voice)),
             _ => None
         }
-
-            .ok_or_else(|| create_error!(NotAVoiceChannel))?;
+        .ok_or_else(|| create_error!(NotAVoiceChannel))?;
 
         room.client
             .create_room(

crates/core/models/src/v0/channels.rs

@@ -324,7 +324,7 @@ auto_derived!(
 
     /// Join a voice channel
     pub struct DataJoinCall {
-        pub node: String
+        pub node: Option<String>
     }
 
 );

crates/delta/src/routes/channels/voice_join.rs

@@ -1,6 +1,6 @@
 use revolt_config::config;
 use revolt_models::v0;
-use revolt_database::{util::{permissions::perms, reference::Reference}, voice::{raise_if_in_voice, VoiceClient}, Channel, Database, SystemMessage, User, AMQP};
+use revolt_database::{util::{permissions::perms, reference::Reference}, voice::{get_channel_node, raise_if_in_voice, VoiceClient}, Channel, Database, SystemMessage, User, AMQP};
 use revolt_permissions::{calculate_channel_permissions, ChannelPermission};
 use revolt_result::{create_error, Result};
 
@@ -12,10 +12,11 @@ use rocket::{serde::json::Json, State};
 #[openapi(tag = "Voice")]
 #[post("/<target>/join_call", data="<data>")]
 pub async fn call(db: &State<Database>, amqp: &State<AMQP>, voice: &State<VoiceClient>, user: User, target: Reference, data: Json<v0::DataJoinCall>) -> Result<Json<v0::CreateVoiceUserResponse>> {
-    let config = config().await;
+    if !voice.is_enabled() {
+        return Err(create_error!(LiveKitUnavailable))
+    }
 
-    let node_host = config.hosts.livekit.get(&data.node)
-        .ok_or_else(|| create_error!(UnknownNode))?;
+    let config = config().await;
 
     let channel = target.as_channel(db).await?;
 
@@ -26,8 +27,17 @@ pub async fn call(db: &State<Database>, amqp: &State<AMQP>, voice: &State<VoiceC
     let current_permissions = calculate_channel_permissions(&mut permissions).await;
     current_permissions.throw_if_lacking_channel_permission(ChannelPermission::Connect)?;
 
-    let token = voice.create_token(&data.node, &user, current_permissions, &channel)?;
-    let room = voice.create_room(&data.node, &channel).await?;
+    let existing_node = get_channel_node(channel.id()).await?;
+
+    let node = existing_node.or(data.into_inner().node)
+        .ok_or_else(|| create_error!(UnknownNode))?;
+
+    let node_host = config.hosts.livekit.get(&node)
+        .ok_or_else(|| create_error!(UnknownNode))?
+        .clone();
+
+    let token = voice.create_token(&node, &user, current_permissions, &channel)?;
+    let room = voice.create_room(&node, &channel).await?;
 
     log::debug!("Created room {}", room.name);
 

crates/delta/src/routes/servers/member_edit.rs

@@ -104,6 +104,10 @@ pub async fn edit(
     }
 
     let new_voice_channel = if let Some(new_channel) = &data.voice_channel {
+        if !voice_client.is_enabled() {
+            return Err(create_error!(LiveKitUnavailable))
+        };
+
         permissions.throw_if_lacking_channel_permission(ChannelPermission::MoveMembers)?;
 
         // ensure the channel we are moving them to is in the server and is a voice channel