From 9a117c080b8a18dc1c9f1291542d2cbd4c70d64f Mon Sep 17 00:00:00 2001
From: Ryan Butler <thebutlah@gmail.com>
Date: Sun, 31 Mar 2024 16:11:22 -0400
Subject: [PATCH] Removed old/outdated ChannelManager code. Not sure its still
 relevant.

---
 crates/replicate/server/src/instance/mod.rs | 65 +--------------------
 1 file changed, 1 insertion(+), 64 deletions(-)

diff --git a/crates/replicate/server/src/instance/mod.rs b/crates/replicate/server/src/instance/mod.rs
index 13f03b7..2a7a302 100644
--- a/crates/replicate/server/src/instance/mod.rs
+++ b/crates/replicate/server/src/instance/mod.rs
@@ -3,73 +3,10 @@
 //! [article][gaffer_vr] on networked physics in VR by GafferOnGames.
 //!
 //! [gaffer_vr]: https://gafferongames.com/post/networked_physics_in_virtual_reality
-// TODO: Remove this
-#![allow(unused)]
 
 mod manager;
 
 pub use self::manager::InstanceManager;
 
-use replicate_common::{ChannelFormat, ChannelId, ClientId};
-use std::collections::{BTreeSet, HashMap};
-
-#[derive(Debug, Default)]
-pub struct Instance {
-	channels: ChannelManager,
-	sessions: HashMap<ClientId, SessionState>,
-}
-
-/// State associated with a client session.
-#[derive(Debug)]
-struct SessionState {
-	/// All channels that this client has registered themselves on during this
-	/// session.
-	channels: HashMap<ChannelFormat, ChannelId>,
-	/// The client associated with this session.
-	client: ClientId,
-}
-
-/// Manages allocation and indices of channels.
 #[derive(Debug, Default)]
-struct ChannelManager {
-	formats: HashMap<ChannelFormat, ChannelId>,
-	/// Channels which have been deleted.
-	holes: BTreeSet<ChannelId>,
-	/// Indexed by `ChannelId`. Deleted channels will be noted in `holes`
-	/// and must be re-initialized before use. They are not dropped when
-	/// deleted to avoid memory allocator pressure.
-	channels: Vec<Channel>,
-}
-
-impl ChannelManager {
-	/// Registers a [`ChannelFormat`] and returns the [`ChannelId`] that references it.
-	///
-	/// If the channel already is registered, returns Err(ChannelId).
-	fn register_channel(
-		&mut self,
-		format: ChannelFormat,
-	) -> Result<ChannelId, ChannelId> {
-		if let Some(&id) = self.formats.get(&format) {
-			return Err(id);
-		}
-		// We use the first hole to prioiritize filling the values closer to the
-		// start of the vec. This will help reduce fragmentation in `self.channels`.
-		if let Some(hole) = self.holes.pop_first() {
-			self.channels[usize::try_from(hole.0).expect("cast err")].reinitialize();
-			Ok(hole)
-		} else {
-			self.channels.push(Channel::default());
-			Ok(ChannelId(
-				(self.channels.len() - 1).try_into().expect("cast err"),
-			))
-		}
-	}
-}
-
-#[derive(Debug, Default)]
-struct Channel {}
-
-impl Channel {
-	/// resets channel to default state, while reusing underlying memory buffers.
-	fn reinitialize(&mut self) {}
-}
+pub struct Instance {}