src/imap/capability.rs

@@ -1,5 +1,7 @@
 use imap_codec::imap_types::core::NonEmptyVec;
 use imap_codec::imap_types::response::Capability;
+use imap_codec::imap_types::extensions::enable::{CapabilityEnable, Utf8Kind};
+use std::collections::HashSet;
 
 fn capability_unselect() -> Capability<'static> {
     Capability::try_from("UNSELECT").unwrap()
@@ -14,84 +16,67 @@ fn capability_qresync() -> Capability<'static> {
 }
 
 #[derive(Debug, Clone)]
-pub struct ServerCapability {
+pub struct ServerCapability(HashSet<Capability<'static>>);
-    r#move: bool,
-    unselect: bool,
-    condstore: bool,
-    qresync: bool,
-}
 
 impl Default for ServerCapability {
     fn default() -> Self {
-        Self {
+        Self(HashSet::from([
-            r#move: true,
+            Capability::Imap4Rev1,
-            unselect: true,
+            Capability::Move,
-            condstore: false,
+            capability_unselect(),
-            qresync: false,
+            //capability_condstore(),
-        }
+            //capability_qresync(),
+        ]))
     }
 }
 
 impl ServerCapability {
     pub fn to_vec(&self) -> NonEmptyVec<Capability<'static>> {
-        let mut acc = vec![Capability::Imap4Rev1];
+        self.0.iter().map(|v| v.clone()).collect::<Vec<_>>().try_into().unwrap()
-        if self.r#move {
-            acc.push(Capability::Move);
-        }
-        if self.unselect {
-            acc.push(capability_unselect());
-        }
-        if self.condstore {
-            acc.push(capability_condstore());
-        }
-        if self.qresync {
-            acc.push(capability_qresync());
-        }
-        acc.try_into().unwrap()
     }
 
+    #[allow(dead_code)]
     pub fn support(&self, cap: &Capability<'static>) -> bool {
-        match cap {
+        self.0.contains(cap)
-            Capability::Imap4Rev1 => true,
-            Capability::Move => self.r#move,
-            x if *x == capability_condstore() => self.condstore,
-            x if *x == capability_qresync() => self.qresync,
-            x if *x == capability_unselect() => self.unselect,
-            _ => false,
-        }
     }
 }
 
+enum ClientStatus {
+    NotSupportedByServer,
+    Disabled,
+    Enabled,
+}
+
 pub struct ClientCapability {
-    condstore: bool,
+    condstore: ClientStatus,
-    qresync: bool,
+    utf8kind: Option<Utf8Kind>,
-}
-
-impl Default for ClientCapability {
-    fn default() -> Self {
-        Self {
-            condstore: false,
-            qresync: false,
-        }
-    }
 }
 
 impl ClientCapability {
+    pub fn new(sc: &ServerCapability) -> Self {
+        Self {
+            condstore: match sc.0.contains(&capability_condstore()) {
+                true => ClientStatus::Disabled,
+                _ => ClientStatus::NotSupportedByServer,
+            },
+            utf8kind: None,
+        }
+    }
+
     pub fn try_enable(
         &mut self,
-        srv: &ServerCapability,
+        caps: &[CapabilityEnable<'static>],
-        caps: &[Capability<'static>],
+    ) -> Vec<CapabilityEnable<'static>> {
-    ) -> Vec<Capability<'static>> {
         let mut enabled = vec![];
         for cap in caps {
             match cap {
-                x if *x == capability_condstore() && srv.condstore && !self.condstore => {
+                CapabilityEnable::CondStore if matches!(self.condstore, ClientStatus::Disabled) => {
-                    self.condstore = true;
+                    self.condstore = ClientStatus::Enabled;
-                    enabled.push(x.clone());
+                    enabled.push(cap.clone());
                 }
-                x if *x == capability_qresync() && srv.qresync && !self.qresync => {
+                CapabilityEnable::Utf8(kind) if Some(kind) != self.utf8kind.as_ref() => {
-                    self.qresync = true;
+                    self.utf8kind = Some(kind.clone());
-                    enabled.push(x.clone());
+                    enabled.push(cap.clone());
                 }
                 _ => (),
             }

src/imap/command/authenticated.rs

@@ -3,14 +3,15 @@ use std::sync::Arc;
 
 use anyhow::{anyhow, bail, Result};
 use imap_codec::imap_types::command::{Command, CommandBody};
-use imap_codec::imap_types::core::{Atom, Literal, QuotedChar};
+use imap_codec::imap_types::core::{Atom, Literal, QuotedChar, NonEmptyVec};
 use imap_codec::imap_types::datetime::DateTime;
 use imap_codec::imap_types::flag::{Flag, FlagNameAttribute};
 use imap_codec::imap_types::mailbox::{ListMailbox, Mailbox as MailboxCodec};
 use imap_codec::imap_types::response::{Code, CodeOther, Data};
 use imap_codec::imap_types::status::{StatusDataItem, StatusDataItemName};
+use imap_codec::imap_types::extensions::enable::CapabilityEnable;
 
-use crate::imap::capability::ServerCapability;
+use crate::imap::capability::{ClientCapability, ServerCapability};
 use crate::imap::command::{anystate, MailboxName};
 use crate::imap::flow;
 use crate::imap::mailbox_view::MailboxView;
@@ -24,6 +25,7 @@ use crate::mail::IMF;
 pub struct AuthenticatedContext<'a> {
     pub req: &'a Command<'static>,
     pub server_capabilities: &'a ServerCapability,
+    pub client_capabilities: &'a mut ClientCapability,
     pub user: &'a Arc<User>,
 }
 
@@ -65,6 +67,11 @@ pub async fn dispatch<'a>(
             message,
         } => ctx.append(mailbox, flags, date, message).await,
 
+        // rfc5161 ENABLE
+        CommandBody::Enable { capabilities } => {
+            ctx.enable(capabilities)
+        },
+
         // Collect other commands
         _ => anystate::wrong_state(ctx.req.tag.clone()),
     }
@@ -511,6 +518,20 @@ impl<'a> AuthenticatedContext<'a> {
         }
     }
 
+    fn enable(self, cap_enable: &NonEmptyVec<CapabilityEnable<'static>>) -> Result<(Response<'static>, flow::Transition)> {
+        let mut response_builder = Response::build().to_req(self.req);
+        let capabilities = self.client_capabilities.try_enable(cap_enable.as_ref());
+        if capabilities.len() > 0 {
+            response_builder = response_builder.data(Data::Enabled { capabilities });
+        }
+        Ok((
+            response_builder
+                .message("ENABLE completed")
+                .ok()?,
+            flow::Transition::None,
+        ))
+    }
+
     pub(crate) async fn append_internal(
         self,
         mailbox: &MailboxCodec<'a>,

src/imap/command/examined.rs

@@ -7,7 +7,7 @@ use imap_codec::imap_types::fetch::MacroOrMessageDataItemNames;
 use imap_codec::imap_types::search::SearchKey;
 use imap_codec::imap_types::sequence::SequenceSet;
 
-use crate::imap::capability::ServerCapability;
+use crate::imap::capability::{ClientCapability, ServerCapability};
 use crate::imap::command::{anystate, authenticated};
 use crate::imap::flow;
 use crate::imap::mailbox_view::MailboxView;
@@ -19,6 +19,7 @@ pub struct ExaminedContext<'a> {
     pub user: &'a Arc<User>,
     pub mailbox: &'a mut MailboxView,
     pub server_capabilities: &'a ServerCapability,
+    pub client_capabilities: &'a mut ClientCapability,
 }
 
 pub async fn dispatch(ctx: ExaminedContext<'_>) -> Result<(Response<'static>, flow::Transition)> {
@@ -60,6 +61,7 @@ pub async fn dispatch(ctx: ExaminedContext<'_>) -> Result<(Response<'static>, fl
             authenticated::dispatch(authenticated::AuthenticatedContext {
                 req: ctx.req,
                 server_capabilities: ctx.server_capabilities,
+                client_capabilities: ctx.client_capabilities,
                 user: ctx.user,
             })
             .await

src/imap/command/selected.rs

@@ -10,7 +10,7 @@ use imap_codec::imap_types::response::{Code, CodeOther};
 use imap_codec::imap_types::search::SearchKey;
 use imap_codec::imap_types::sequence::SequenceSet;
 
-use crate::imap::capability::ServerCapability;
+use crate::imap::capability::{ClientCapability, ServerCapability};
 use crate::imap::command::{anystate, authenticated, MailboxName};
 use crate::imap::flow;
 use crate::imap::mailbox_view::MailboxView;
@@ -23,6 +23,7 @@ pub struct SelectedContext<'a> {
     pub user: &'a Arc<User>,
     pub mailbox: &'a mut MailboxView,
     pub server_capabilities: &'a ServerCapability,
+    pub client_capabilities: &'a mut ClientCapability,
 }
 
 pub async fn dispatch<'a>(
@@ -76,6 +77,7 @@ pub async fn dispatch<'a>(
             authenticated::dispatch(authenticated::AuthenticatedContext {
                 req: ctx.req,
                 server_capabilities: ctx.server_capabilities,
+                client_capabilities: ctx.client_capabilities,
                 user: ctx.user,
             })
             .await

src/imap/session.rs

@@ -1,4 +1,4 @@
-use crate::imap::capability::ServerCapability;
+use crate::imap::capability::{ClientCapability, ServerCapability};
 use crate::imap::command::{anonymous, authenticated, examined, selected};
 use crate::imap::flow;
 use crate::imap::response::Response;
@@ -9,14 +9,17 @@ use imap_codec::imap_types::command::Command;
 pub struct Instance {
     pub login_provider: ArcLoginProvider,
     pub server_capabilities: ServerCapability,
+    pub client_capabilities: ClientCapability,
     pub state: flow::State,
 }
 impl Instance {
     pub fn new(login_provider: ArcLoginProvider, cap: ServerCapability) -> Self {
+        let client_cap = ClientCapability::new(&cap);
         Self {
             login_provider,
             state: flow::State::NotAuthenticated,
             server_capabilities: cap,
+            client_capabilities: client_cap,
         }
     }
 
@@ -36,6 +39,7 @@ impl Instance {
                 let ctx = authenticated::AuthenticatedContext {
                     req: &cmd,
                     server_capabilities: &self.server_capabilities,
+                    client_capabilities: &mut self.client_capabilities,
                     user,
                 };
                 authenticated::dispatch(ctx).await
@@ -44,6 +48,7 @@ impl Instance {
                 let ctx = selected::SelectedContext {
                     req: &cmd,
                     server_capabilities: &self.server_capabilities,
+                    client_capabilities: &mut self.client_capabilities,
                     user,
                     mailbox,
                 };
@@ -53,6 +58,7 @@ impl Instance {
                 let ctx = examined::ExaminedContext {
                     req: &cmd,
                     server_capabilities: &self.server_capabilities,
+                    client_capabilities: &mut self.client_capabilities,
                     user,
                     mailbox,
                 };