OperServ: add SHUTDOWN and RESTART

modules/operserv/src/shutdown.rs

@@ -0,0 +1,19 @@
+use echo_api::{Priv, Sender, ServiceCtx};
+
+// SHUTDOWN / RESTART [reason]: stop the services process. `restart` selects
+// which — a restart exits so a supervisor respawns us, a shutdown stays down.
+// Admin-only, and the heaviest command services have. Announced network-wide
+// first so users know why services vanished.
+pub fn handle(me: &str, from: &Sender, restart: bool, args: &[&str], ctx: &mut ServiceCtx) {
+    let cmd = if restart { "RESTART" } else { "SHUTDOWN" };
+    if !from.privs.has(Priv::Admin) {
+        ctx.notice(me, from.uid, format!("Access denied — {cmd} needs the \x02admin\x02 privilege."));
+        return;
+    }
+    let reason = if args.len() > 1 { args[1..].join(" ") } else { format!("Services {}", if restart { "restarting" } else { "shutting down" }) };
+    let by = from.account.unwrap_or(from.nick);
+    ctx.global(me, format!("[\x02Network\x02] Services are {} ({reason}).", if restart { "restarting" } else { "going down" }));
+    ctx.notice(me, from.uid, format!("Services are {}.", if restart { "restarting" } else { "shutting down" }));
+    // The action is last, so the notices above are flushed before we exit.
+    ctx.shutdown(restart, format!("{cmd} by {by}: {reason}"));
+}