modules: port randquote, disable, restrictchans, channames

src/modules/disable.rs

@@ -0,0 +1,45 @@
+//! disable — refuse a configured set of commands to ordinary users (opers bypass).
+//! `disabled_commands = LIST WHO KNOCK` (space-separated; repeatable). A disabled
+//! command replies with `421` as if it didn't exist. Off unless configured.
+//!
+//! Behaviour reference: InspIRCd's `m_disable`. Original native Rust.
+
+use crate::module::{ModResult, Module};
+use crate::numeric::ERR_UNKNOWNCOMMAND;
+use crate::server::Server;
+use crate::Uid;
+
+pub struct Disable;
+
+impl Module for Disable {
+    fn name(&self) -> &'static str {
+        "disable"
+    }
+
+    fn on_pre_command(
+        &mut self,
+        srv: &mut Server,
+        uid: Uid,
+        cmd: &str,
+        _params: &[String],
+    ) -> ModResult {
+        // opers are never restricted
+        if srv.is_oper(uid) {
+            return ModResult::Passthru;
+        }
+        let disabled = srv
+            .conf_all("disabled_commands")
+            .iter()
+            .flat_map(|line| line.split_whitespace())
+            .any(|c| c.eq_ignore_ascii_case(cmd));
+        if disabled {
+            srv.numeric(
+                uid,
+                ERR_UNKNOWNCOMMAND,
+                &format!("{cmd} :This command has been disabled by the administrator."),
+            );
+            return ModResult::Deny;
+        }
+        ModResult::Passthru
+    }
+}