modules: port maphide and tline

src/modules/maphide.rs

@@ -0,0 +1,44 @@
+//! maphide — hide the server map (`LINKS` / `MAP`) from ordinary users, so the
+//! network topology isn't exposed to non-operators. Off unless `maphide = yes`.
+//!
+//! Behaviour reference: InspIRCd's `m_maphide`. Original native Rust.
+
+use crate::module::{ModResult, Module};
+use crate::server::Server;
+use crate::Uid;
+
+pub struct MapHide;
+
+impl Module for MapHide {
+    fn name(&self) -> &'static str {
+        "maphide"
+    }
+
+    fn on_pre_command(
+        &mut self,
+        srv: &mut Server,
+        uid: Uid,
+        cmd: &str,
+        _params: &[String],
+    ) -> ModResult {
+        if !srv.conf_bool("maphide", false) || srv.is_oper(uid) {
+            return ModResult::Passthru;
+        }
+        if cmd.eq_ignore_ascii_case("LINKS") || cmd.eq_ignore_ascii_case("MAP") {
+            let nick = srv
+                .users
+                .get(&uid)
+                .map(|u| u.nick.clone())
+                .unwrap_or_default();
+            srv.send(
+                uid,
+                format!(
+                    ":{} NOTICE {nick} :The server map is hidden; ask an operator.",
+                    srv.name
+                ),
+            );
+            return ModResult::Deny;
+        }
+        ModResult::Passthru
+    }
+}