delaymsg channel mode (+d <secs>)

src/channels.rs

@@ -18,6 +18,7 @@ pub struct Member {
     pub op: bool,     // +o (@)
     pub halfop: bool, // +h (%)
     pub voice: bool,  // +v (+)
+    pub joined: u64,  // unix ts this member joined (for +d delaymsg; 0 = unknown)
 }
 
 /// Prefix ranks, high→low — gate who may grant a prefix / kick whom.
@@ -155,6 +156,7 @@ pub struct ChanModes {
     pub permanent: bool,             // +P — channel persists with zero members
     pub kicknorejoin: Option<u32>,   // +J <secs> — block rejoin for N secs after a kick
     pub opmoderated: bool,           // +U — unprivileged users' messages go to ops only
+    pub delaymsg: Option<u32>,       // +d <secs> — new joiners can't speak for N secs
 }
 
 impl ChanModes {
@@ -551,6 +553,7 @@ impl Server {
             uid,
             Member {
                 op: is_new,
+                joined: now(),
                 ..Default::default()
             },
         );

src/coremods/core_message.rs

@@ -216,6 +216,27 @@ pub(crate) fn deliver(s: &mut Server, uid: Uid, params: &[String], notice: bool)
             }
             return CmdResult::Fail;
         }
+        // +d delaymsg — a just-joined unprivileged user must wait before speaking
+        if let Some(secs) = s.channels.get(&key).and_then(|c| c.modes.delaymsg) {
+            if s.rank(uid, &key) < RANK_VOICE {
+                let joined = s
+                    .channels
+                    .get(&key)
+                    .and_then(|c| c.members.get(&uid))
+                    .map(|m| m.joined)
+                    .unwrap_or(0);
+                if joined != 0 && crate::server::now().saturating_sub(joined) < secs as u64 {
+                    if !notice {
+                        s.numeric(
+                            uid,
+                            ERR_CANNOTSENDTOCHAN,
+                            &format!("{target} :You must wait {secs}s after joining to speak (+d)"),
+                        );
+                    }
+                    return CmdResult::Fail;
+                }
+            }
+        }
         // extban `m:` mute — matched users can't speak unless voiced-or-above
         if s.extban_active(uid, &key, 'm') && s.rank(uid, &key) < RANK_VOICE {
             if !notice {

src/mode.rs

@@ -90,6 +90,7 @@ static CHAN_MODES: &[&(dyn ChanMode + Sync)] = &[
     &PERMANENT,
     &KICKNOREJOIN,
     &OPMODERATED,
+    &DELAYMSG,
 ];
 
 // --- prefix modes (+q/+a/+o/+h/+v): a per-member rank, needs a nick ----------
@@ -910,6 +911,47 @@ impl ChanMode for KickNoRejoinMode {
     }
 }
 
+/// +d `<secs>` — a newly-joined member can't speak for `<secs>` seconds (InspIRCd
+/// `m_delaymsg`). Enforced in the message path; voiced-or-above are exempt.
+struct DelayMsgMode;
+static DELAYMSG: DelayMsgMode = DelayMsgMode;
+impl ChanMode for DelayMsgMode {
+    fn letter(&self) -> char {
+        'd'
+    }
+    fn wants_param(&self, adding: bool) -> bool {
+        adding
+    }
+    fn apply(
+        &self,
+        s: &mut Server,
+        _chan: &str,
+        key: &str,
+        _uid: Uid,
+        adding: bool,
+        param: Option<&str>,
+    ) -> Applied {
+        if adding {
+            let Some(secs) = param
+                .and_then(|p| p.parse::<u32>().ok())
+                .filter(|&n| n >= 1)
+            else {
+                return Applied::No;
+            };
+            let secs = secs.min(3600);
+            if let Some(c) = s.channels.get_mut(key) {
+                c.modes.delaymsg = Some(secs);
+            }
+            Applied::Yes(Some(secs.to_string()))
+        } else {
+            if let Some(c) = s.channels.get_mut(key) {
+                c.modes.delaymsg = None;
+            }
+            Applied::Yes(None)
+        }
+    }
+}
+
 // === user modes ============================================================
 
 /// A user mode (+i/+w/+o) — same handler-object shape as [`ChanMode`], and the
@@ -1150,7 +1192,7 @@ mod tests {
 
     #[test]
     fn registry_covers_all_channel_modes() {
-        for c in "qaohvbeIklmntiszpONCTcSRMfjFLgGuBQAPJU".chars() {
+        for c in "qaohvbeIklmntiszpONCTcSRMfjFLgGuBQAPJUd".chars() {
             assert!(chan_mode(c).is_some(), "missing handler for +{c}");
         }
         assert!(chan_mode('y').is_none());

src/users.rs

@@ -418,7 +418,7 @@ impl Server {
             uid,
             RPL_MYINFO,
             &format!(
-                "{} echoircd-{VERSION} iowxsgBDIHrRzWc qaohvbeIklimnpstzCTcSNORMfjFLgGuBQAPJU",
+                "{} echoircd-{VERSION} iowxsgBDIHrRzWc qaohvbeIklimnpstzCTcSNORMfjFLgGuBQAPJUd",
                 self.name
             ),
         );
@@ -426,7 +426,7 @@ impl Server {
             uid,
             RPL_ISUPPORT,
             &format!(
-                "CHANTYPES=# PREFIX=(qaohv)~&@%+ CHANMODES=beIg,k,lfjFLHBJ,ACGMNOPQRSTUcimnpstuz 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",
+                "CHANTYPES=# PREFIX=(qaohv)~&@%+ CHANMODES=beIg,k,lfjFLHBJd,ACGMNOPQRSTUcimnpstuz 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
             ),
         );