chanlog: mirror the oper server-notice stream into a configured channel

echoircd.conf.example

@@ -117,6 +117,9 @@ amu_target    = both
 # hidewhois_hide_server = yes  # hide 312
 # hidewhois_hide_idle = yes    # hide 317
 # hidewhois_hide_secure = yes  # hide 671
+# --- chanlog (m_chanlog): mirror the oper server-notice stream into a channel so
+#     staff can watch it in a normal window. Set the channel (create/keep it opped):
+# chanlog = #snotices
 # --- banredirect (m_banredirect): no config needed — it extends ban syntax. A
 #     ban `+b <mask>$<#channel>` bounces a matching user into #channel instead of
 #     refusing them, e.g.  /MODE #main +b *!*@*.spammer.net$#quarantine

src/modules/chanlog.rs

@@ -0,0 +1,23 @@
+//! chanlog — mirror server notices (the `snotice` stream opers see with +s) into a
+//! channel, so staff can watch the log in a normal channel window. Off unless
+//! `chanlog = #channel` is configured. Reference: InspIRCd's `m_chanlog`.
+//! Original native Rust.
+
+use crate::server::Server;
+use crate::Uid;
+
+/// Tee `msg` to the configured chanlog channel (if set and it exists). Called at
+/// the tail of `Server::snotice`. Read-only over server state, so it can't loop.
+pub fn tee(s: &Server, msg: &str) {
+    let Some(chan) = s.conf("chanlog") else {
+        return;
+    };
+    let Some(ch) = s.channels.get(&chan.to_ascii_lowercase()) else {
+        return; // channel not created yet — nothing to log into
+    };
+    let line = format!(":{} NOTICE {chan} :{msg}", s.name);
+    let members: Vec<Uid> = ch.members.keys().copied().collect();
+    for u in members {
+        s.send(u, line.clone());
+    }
+}

src/modules/mod.rs

@@ -10,6 +10,7 @@ pub mod banredirect;
 pub mod blockamsg;
 pub mod channames;
 pub mod channelban;
+pub mod chanlog;
 pub mod chathistory;
 pub mod cloak;
 pub mod cloudflare_challenge;

src/server.rs

@@ -729,6 +729,7 @@ impl Server {
         for o in opers {
             self.deliver_server_notice(o, msg, &jval);
         }
+        crate::modules::chanlog::tee(self, msg);
     }
 
     /// Broadcast a `*** msg` server NOTICE to *every* registered local user — for