src/imap/command/selected.rs

@@ -81,7 +81,10 @@ pub async fn dispatch<'a>(
 
         // IDLE extension (rfc2177)
         CommandBody::Idle => {
-            unimplemented!()
+            Ok((
+                Response::build().to_req(ctx.req).message("DUMMY response due to anti-pattern").ok()?,
+                flow::Transition::Idle(tokio::sync::Notify::new()),
+            ))
         }
 
         // In selected mode, we fallback to authenticated when needed

src/imap/flow.rs

@@ -1,6 +1,7 @@
 use std::error::Error as StdError;
 use std::fmt;
 use std::sync::Arc;
+use tokio::sync::Notify;
 
 use crate::imap::mailbox_view::MailboxView;
 use crate::mail::user::User;
@@ -20,7 +21,7 @@ pub enum State {
     NotAuthenticated,
     Authenticated(Arc<User>),
     Selected(Arc<User>, MailboxView, MailboxPerm),
-    Idle(Arc<User>, MailboxView, MailboxPerm),
+    Idle(Arc<User>, MailboxView, MailboxPerm, Notify),
     Logout,
 }
 
@@ -34,7 +35,7 @@ pub enum Transition {
     None,
     Authenticate(Arc<User>),
     Select(MailboxView, MailboxPerm),
-    Idle,
+    Idle(Notify),
     UnIdle,
     Unselect,
     Logout,
@@ -54,10 +55,10 @@ impl State {
             (State::Selected(u, _, _) , Transition::Unselect) => {
                 State::Authenticated(u.clone())
             }
-            (State::Selected(u, m, p), Transition::Idle) => {
-                State::Idle(u, m, p)
+            (State::Selected(u, m, p), Transition::Idle(s)) => {
+                State::Idle(u, m, p, s)
             },
-            (State::Idle(u, m, p), Transition::UnIdle) => {
+            (State::Idle(u, m, p, _), Transition::UnIdle) => {
                 State::Selected(u, m, p)
             },
             (_, Transition::Logout) => State::Logout,

src/imap/mod.rs

@@ -101,9 +101,10 @@ use  tokio::sync::mpsc::*;
 enum LoopMode {
     Quit,
     Interactive,
-    IdleUntil(tokio::sync::Notify),
+    Idle,
 }
 
+// @FIXME a full refactor of this part of the code will be needed sooner or later
 struct NetLoop {
     ctx: ClientContext,
     server: ServerFlow,
@@ -189,7 +190,7 @@ impl NetLoop {
         loop {
             mode = match mode {
                 LoopMode::Interactive => self.interactive_mode().await?,
-                LoopMode::IdleUntil(notif) => self.idle_mode(notif).await?,
+                LoopMode::Idle => self.idle_mode().await?,
                 LoopMode::Quit => break,
             }
         }
@@ -237,15 +238,18 @@ impl NetLoop {
                     }
                     self.server.enqueue_status(response.completion);
                 },
-                Some(ResponseOrIdle::Idle) => {
-                    let cr = CommandContinuationRequest::basic(None, "idling")?;
+                Some(ResponseOrIdle::StartIdle) => {
+                    let cr = CommandContinuationRequest::basic(None, "Idling")?;
                     self.server.enqueue_continuation(cr);
-                    return Ok(LoopMode::IdleUntil(tokio::sync::Notify::new()))
+                    self.cmd_tx.try_send(Request::Idle)?;
+                    return Ok(LoopMode::Idle)
                 },
                 None => {
                     self.server.enqueue_status(Status::bye(None, "Internal session exited").unwrap());
                     tracing::error!("session task exited for {:?}, quitting", self.ctx.addr);
                 },
+                Some(_) => unreachable!(),
+                
             },
 
             // When receiving a CTRL+C
@@ -256,7 +260,37 @@ impl NetLoop {
         Ok(LoopMode::Interactive)
     }
 
-    async fn idle_mode(&mut self, notif: tokio::sync::Notify) -> Result<LoopMode> {
-        Ok(LoopMode::IdleUntil(notif))
+    async fn idle_mode(&mut self) -> Result<LoopMode> {
+        tokio::select! {
+            maybe_msg = self.resp_rx.recv() => match maybe_msg {
+                Some(ResponseOrIdle::Response(response)) => {
+                    for body_elem in response.body.into_iter() {
+                        let _handle = match body_elem {
+                            Body::Data(d) => self.server.enqueue_data(d),
+                            Body::Status(s) => self.server.enqueue_status(s),
+                        };
+                    }
+                    self.server.enqueue_status(response.completion);
+                    return Ok(LoopMode::Interactive)
+                },
+                Some(ResponseOrIdle::IdleEvent(elems)) => {
+                    for body_elem in elems.into_iter() {
+                        let _handle = match body_elem {
+                            Body::Data(d) => self.server.enqueue_data(d),
+                            Body::Status(s) => self.server.enqueue_status(s),
+                        };
+                    }
+                    return Ok(LoopMode::Idle)
+                },
+                None => {
+                    self.server.enqueue_status(Status::bye(None, "Internal session exited").unwrap());
+                    tracing::error!("session task exited for {:?}, quitting", self.ctx.addr);
+                    return Ok(LoopMode::Interactive)
+                },
+                Some(ResponseOrIdle::StartIdle) => unreachable!(),
+            }
+        };
+        /*self.cmd_tx.try_send(Request::Idle).unwrap();
+        Ok(LoopMode::Idle)*/
     }
 }

src/imap/request.rs

@@ -4,5 +4,5 @@ use tokio::sync::Notify;
 #[derive(Debug)]
 pub enum Request {
     ImapCommand(Command<'static>),
-    IdleUntil(Notify),
+    Idle,
 }

src/imap/response.rs

@@ -116,5 +116,6 @@ impl<'a> Response<'a> {
 #[derive(Debug)]
 pub enum ResponseOrIdle {
     Response(Response<'static>),
-    Idle,
+    StartIdle,
+    IdleEvent(Vec<Body<'static>>),
 }

src/imap/session.rs

@@ -27,14 +27,14 @@ impl Instance {
 
     pub async fn request(&mut self, req: Request) -> ResponseOrIdle {
         match req {
-            Request::IdleUntil(stop) => ResponseOrIdle::Response(self.idle(stop).await),
+            Request::Idle => ResponseOrIdle::Response(self.idle().await),
             Request::ImapCommand(cmd) => self.command(cmd).await,
         }
     }
 
-    pub async fn idle(&mut self, stop: tokio::sync::Notify) -> Response<'static> {
-        let (user, mbx) = match &mut self.state {
-            flow::State::Idle(ref user, ref mut mailbox, ref perm) => (user, mailbox),
+    pub async fn idle(&mut self) -> Response<'static> {
+        let (user, mbx, perm, stop) = match &mut self.state {
+            flow::State::Idle(ref user, ref mut mailbox, ref perm, ref stop) => (user, mailbox, perm, stop),
             _ => unreachable!(),
         };
 
@@ -109,7 +109,7 @@ impl Instance {
         }
 
         match self.state {
-            flow::State::Idle(..) => ResponseOrIdle::Idle,
+            flow::State::Idle(..) => ResponseOrIdle::StartIdle,
             _ => ResponseOrIdle::Response(resp),
         }
     }