feat: cleaner way to detach and stop workers

actually the stopping channel doesn't fit super well inside the
OperationController itself since the tasks are handled above that
abstraction layer, but storing it inside makes my life incredibly
simpler so im gonna do that for now

src/client/nvim/codemp.lua

@@ -69,7 +69,6 @@ local function unhook_callbacks(buffer)
 	vim.api.nvim_clear_autocmds({ group = codemp_autocmds, buffer = buffer })
 	vim.keymap.del('i', '<BS>',  { buffer = buffer })
 	vim.keymap.del('i', '<Del>', { buffer = buffer })
-	vim.keymap.del('i', '<CR>',  { buffer = buffer })
 end
 
 local function auto_address(addr)
@@ -162,8 +161,12 @@ vim.api.nvim_create_user_command('Join',
 vim.api.nvim_create_user_command('Detach',
 	function(args)
 		local bufnr = vim.api.nvim_get_current_buf()
+		if M.detach(args.fargs[1]) then
 			unhook_callbacks(bufnr)
-		M.detach(args.fargs[1])
+			print("[/] detached from buffer")
+		else
+			print("[!] error detaching from buffer")
+		end
 	end,
 { nargs=1 })
 

src/client/nvim/main.rs

@@ -147,6 +147,7 @@ impl Handler for NeovimHandler {
 							Ok(()) => {
 								tokio::spawn(async move {
 									loop {
+										if !_controller.run() { break }
 										let _span = _controller.wait().await;
 										// TODO only change lines affected!
 										let lines : Vec<String> = _controller.content().split("\n").map(|x| x.to_string()).collect();
@@ -164,17 +165,26 @@ impl Handler for NeovimHandler {
 			},
 
 			"detach" => {
-				Err(Value::from("unimplemented! try with :q!"))
-				// if args.len() < 1 {
-				// 	return Err(Value::from("no path given"));
-				// }
-				// let path = default_empty_str(&args, 0);
-				// let mut c = self.client.clone();
-				// c.detach(path);
-				// Ok(Value::Nil)
+				if args.len() < 1 {
+					return Err(Value::from("no path given"));
+				}
+				let path = default_empty_str(&args, 0);
+				match self.buffer_controller(&path) {
+					None => Err(Value::from("no controller for given path")),
+					Some(controller) => Ok(Value::from(controller.stop())),
+				}
 			},
 
 			"listen" => {
+				if args.len() < 1 {
+					return Err(Value::from("no path given"));
+				}
+				let path = default_empty_str(&args, 0);
+				let controller = match self.buffer_controller(&path) {
+					None => return Err(Value::from("no controller for given path")),
+					Some(c) => c,
+				};
+
 				let ns = nvim.create_namespace("Cursor").await
 					.map_err(|e| Value::from(format!("could not create namespace: {}", e)))?;
 
@@ -189,6 +199,7 @@ impl Handler for NeovimHandler {
 						debug!("spawning cursor processing worker");
 						tokio::spawn(async move {
 							loop {
+								if !controller.run() { break }
 								match sub.recv().await {
 									Err(e) => return error!("error receiving cursor update from controller: {}", e),
 									Ok((_usr, cur)) => {

src/lib/client.rs

@@ -2,12 +2,12 @@ use std::sync::Arc;
 
 use operational_transform::OperationSeq;
 use tonic::{transport::Channel, Status};
-use tracing::{error, warn};
+use tracing::{error, warn, info};
 use uuid::Uuid;
 
 use crate::{
 	cursor::{CursorController, CursorStorage},
-	operation::{OperationController, OperationProcessor},
+	operation::{OperationProcessor, OperationController},
 	proto::{buffer_client::BufferClient, BufferPayload, OperationRequest, CursorMov},
 };
 
@@ -79,11 +79,12 @@ impl CodempClient {
 		let _factory = factory.clone();
 		tokio::spawn(async move {
 			loop {
+				if !_factory.run() { break }
 				match stream.message().await {
 					Err(e) => break error!("error receiving update: {}", e),
 					Ok(None) => break, // clean exit
 					Ok(Some(x)) => match serde_json::from_str::<OperationSeq>(&x.opseq) {
-						Err(e) => break error!("error deserializing opseq: {}", e),
+						Err(e) => error!("error deserializing opseq: {}", e),
 						Ok(v) => match _factory.process(v).await {
 							Err(e) => break error!("could not apply operation from server: {}", e),
 							Ok(_range) => { } // user gets this range by awaiting wait() so we can drop it here
@@ -99,6 +100,7 @@ impl CodempClient {
 		let _path = path.clone();
 		tokio::spawn(async move {
 			while let Some(op) = _factory.poll().await {
+				if !_factory.run() { break }
 				let req = OperationRequest {
 					hash: "".into(),
 					opseq: serde_json::to_string(&op).unwrap(),

src/lib/operation/controller.rs

@@ -2,7 +2,7 @@ use std::{sync::Mutex, collections::VecDeque, ops::Range};
 
 use operational_transform::{OperationSeq, OTError};
 use tokio::sync::watch;
-use tracing::warn;
+use tracing::{warn, error};
 
 use super::{OperationFactory, OperationProcessor, op_effective_range};
 
@@ -14,12 +14,15 @@ pub struct OperationController {
 	notifier: watch::Sender<OperationSeq>,
 	changed: Mutex<watch::Receiver<Range<u64>>>,
 	changed_notifier: watch::Sender<Range<u64>>,
+	run: watch::Receiver<bool>,
+	stop: watch::Sender<bool>,
 }
 
 impl OperationController {
 	pub fn new(content: String) -> Self {
 		let (tx, rx) = watch::channel(OperationSeq::default());
 		let (done, wait) = watch::channel(0..0);
+		let (stop, run) = watch::channel(true);
 		OperationController {
 			text: Mutex::new(content),
 			queue: Mutex::new(VecDeque::new()),
@@ -27,6 +30,7 @@ impl OperationController {
 			notifier: tx,
 			changed: Mutex::new(wait),
 			changed_notifier: done,
+			run, stop,
 		}
 	}
 
@@ -53,6 +57,20 @@ impl OperationController {
 	pub async fn ack(&self) -> Option<OperationSeq> {
 		self.queue.lock().unwrap().pop_front()
 	}
+
+	pub fn stop(&self) -> bool {
+		match self.stop.send(false) {
+			Ok(()) => true,
+			Err(e) => {
+				error!("could not send stop signal to workers: {}", e);
+				false
+			}
+		}
+	}
+
+	pub fn run(&self) -> bool {
+		*self.run.borrow()
+	}
 }
 
 impl OperationFactory for OperationController {