markread (draft/read-marker, identity-shared) + advertise UTF8ONLY

src/coremods/core_message.rs

@@ -125,9 +125,60 @@ pub fn commands() -> Vec<Box<dyn Command>> {
         Box::new(TagMsg),
         Box::new(ChatHistory),
         Box::new(Redact),
+        Box::new(MarkRead),
     ]
 }
 
+/// MARKREAD — draft/read-marker. `MARKREAD <target> [timestamp=<iso>]`. With a
+/// timestamp it sets the read marker (only ever advancing) and echoes it to every
+/// connection sharing the user's identity (multi-device); without one it returns
+/// the stored marker (`*` if unset).
+struct MarkRead;
+impl Command for MarkRead {
+    fn name(&self) -> &'static str {
+        "MARKREAD"
+    }
+    fn min_params(&self) -> usize {
+        1
+    }
+    fn handle(&self, s: &mut Server, uid: Uid, params: &[String]) -> CmdResult {
+        let target = params[0].clone();
+        let tkey = target.to_ascii_lowercase();
+        let id = s.marker_id(uid);
+        match params.get(1).and_then(|p| p.strip_prefix("timestamp=")) {
+            Some(ts_str) => {
+                let cur = s
+                    .read_markers
+                    .get(&id)
+                    .and_then(|m| m.get(&tkey))
+                    .copied()
+                    .unwrap_or(0);
+                let ts = parse_iso(ts_str).unwrap_or(0).max(cur); // markers only advance
+                s.read_markers
+                    .entry(id.clone())
+                    .or_default()
+                    .insert(tkey, ts);
+                let line = format!(":{} MARKREAD {target} timestamp={}", s.name, iso_time(ts));
+                let uids: Vec<Uid> = s.users.keys().copied().collect();
+                for p in uids.into_iter().filter(|&p| s.marker_id(p) == id) {
+                    s.send(p, line.clone());
+                }
+            }
+            None => {
+                let val = s
+                    .read_markers
+                    .get(&id)
+                    .and_then(|m| m.get(&tkey))
+                    .copied()
+                    .map(|t| format!("timestamp={}", iso_time(t)))
+                    .unwrap_or_else(|| "*".to_string());
+                s.send(uid, format!(":{} MARKREAD {target} {val}", s.name));
+            }
+        }
+        CmdResult::Ok
+    }
+}
+
 /// REDACT — delete a previously-sent channel message (draft/message-redaction).
 /// `REDACT <#chan> <msgid> [:reason]`. Allowed for the message's author, a channel
 /// half-op-or-above, or an oper. Relayed to channel members who enabled the cap,

src/server.rs

@@ -150,8 +150,9 @@ pub struct Server {
     // output primitives are `&self`.
     pub label_capture: RefCell<Option<(Uid, Vec<String>)>>,
     pub history: HashMap<String, VecDeque<HistMsg>>, // channel key -> recent messages (CHATHISTORY)
-    pub event_tx: Sender<Event>,                     // self-inject events (DNS results)
-    pub conn_counter: Arc<AtomicU64>,                // mints connection uids (for CONNECT dials)
+    pub read_markers: HashMap<String, HashMap<String, u64>>, // identity -> target -> read ts (MARKREAD)
+    pub event_tx: Sender<Event>,                             // self-inject events (DNS results)
+    pub conn_counter: Arc<AtomicU64>, // mints connection uids (for CONNECT dials)
 }
 
 impl Server {
@@ -194,6 +195,7 @@ impl Server {
             webirc: cfg.webirc,
             label_capture: RefCell::new(None),
             history: HashMap::new(),
+            read_markers: HashMap::new(),
             event_tx,
             conn_counter,
         }
@@ -248,6 +250,16 @@ impl Server {
         }
     }
 
+    /// The read-marker identity for `uid`: their account when logged in (so markers
+    /// are shared across their devices and survive reconnects), else a per-session
+    /// key. `remove_user` prunes the session key on disconnect.
+    pub fn marker_id(&self, uid: Uid) -> String {
+        self.users
+            .get(&uid)
+            .and_then(|u| u.account.clone())
+            .unwrap_or_else(|| format!("~{uid}"))
+    }
+
     // --- connection lifecycle ------------------------------------------------
 
     pub fn add_conn(
@@ -425,6 +437,7 @@ impl Server {
             return;
         };
         self.uuid_local.remove(&user.uuid);
+        self.read_markers.remove(&format!("~{uid}")); // session read-markers (kept if account-keyed)
         if user.registered {
             self.push_whowas(
                 &user.nick,

src/users.rs

@@ -400,7 +400,7 @@ impl Server {
             uid,
             RPL_ISUPPORT,
             &format!(
-                "CHANTYPES=# PREFIX=(qaohv)~&@%+ CHANMODES=beIg,k,lfjFL,CGMNORSTcimnpstuz EXTBAN=,cmn WATCH=128 MONITOR=128 SILENCE=32 CALLERID=g WHOX CHATHISTORY=256 MSGREFTYPES=timestamp,msgid CASEMAPPING=ascii NICKLEN=30 CHANNELLEN=50 NETWORK={} :are supported by this server",
+                "CHANTYPES=# PREFIX=(qaohv)~&@%+ CHANMODES=beIg,k,lfjFL,CGMNORSTcimnpstuz EXTBAN=,cmn WATCH=128 MONITOR=128 SILENCE=32 CALLERID=g WHOX CHATHISTORY=256 MSGREFTYPES=timestamp,msgid UTF8ONLY CASEMAPPING=ascii NICKLEN=30 CHANNELLEN=50 NETWORK={} :are supported by this server",
                 self.network
             ),
         );