Add the system.listMethods RPC method.

Still to implement:

- system.getCapabilities
- system.methodHelp
- system.methodSignature

modules/rpc/rpc_system.cpp

@@ -0,0 +1,64 @@
+/*
+ *
+ * (C) 2010-2025 Anope Team
+ * Contact us at team@anope.org
+ *
+ * Please read COPYING and README for further details.
+ */
+
+#include "module.h"
+#include "modules/rpc.h"
+
+// TODO:
+//
+// * system.getCapabilities
+// * system.methodHelp
+// * system.methodSignature
+
+
+class SystemListMethodsRPCEvent final
+	: public RPC::Event
+{
+public:
+	SystemListMethodsRPCEvent()
+		: RPC::Event("system.listMethods")
+	{
+	}
+
+	bool Run(RPC::ServiceInterface *iface, HTTPClient *client, RPC::Request &request) override
+	{
+		auto &root = request.Root<RPC::Array>();
+		for (const auto &[event, _] : iface->GetEvents())
+			root.Reply(event);
+		return true;
+	}
+};
+
+class ModuleRPCSystem final
+	: public Module
+{
+private:
+	ServiceReference<RPC::ServiceInterface> rpc;
+	SystemListMethodsRPCEvent systemlistmethodsrpcevent;
+
+public:
+	ModuleRPCSystem(const Anope::string &modname, const Anope::string &creator)
+		: Module(modname, creator, EXTRA | VENDOR)
+		, rpc("RPCServiceInterface", "rpc")
+	{
+		if (!rpc)
+			throw ModuleException("Unable to find RPC interface, is jsonrpc/xmlrpc loaded?");
+
+		rpc->Register(&systemlistmethodsrpcevent);
+	}
+
+	~ModuleRPCSystem() override
+	{
+		if (!rpc)
+			return;
+
+		rpc->Unregister(&systemlistmethodsrpcevent);
+	}
+};
+
+MODULE_INIT(ModuleRPCSystem)