Add the system.listMethods RPC method.

Still to implement:

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

data/modules.example.conf

@@ -824,3 +824,12 @@ module { name = "sasl" }
  * Requires xmlrpc.
  */
 #module { name = "rpc_main" }
+
+/*
+ * rpc_system
+ *
+ * Adds support for the system.listMethods RPC method.
+ *
+ * Requires either the jsonrpc or xmlrpc module.
+ */
+#module { name = "rpc_system" }

include/modules/rpc.h

@@ -21,6 +21,9 @@ namespace RPC
 	class ServiceInterface;
 	class Value;
 
+	/** Represents a list of registered events. */
+	using Events = Anope::map<Event *>;
+
 	/** Represents possible types of RPC value. */
 	using ValueUnion = std::variant<Array, Map, Anope::string, std::nullptr_t, bool, double, int64_t, uint64_t>;
 
@@ -194,6 +197,8 @@ public:
 	{
 	}
 
+	virtual const Events &GetEvents() = 0;
+
 	virtual bool Register(Event *event) = 0;
 
 	virtual bool Unregister(Event *event) = 0;

modules/extra/xmlrpc.cpp

@@ -23,7 +23,7 @@ class MyXMLRPCServiceInterface final
 	, public HTTPPage
 {
 private:
-	Anope::map<RPC::Event *> events;
+	RPC::Events events;
 
 	static void SendError(HTTPReply &reply, xmlrpc_env &env)
 	{
@@ -69,6 +69,11 @@ public:
 	{
 	}
 
+	const RPC::Events &GetEvents() override
+	{
+		return events;
+	}
+
 	bool Register(RPC::Event *event) override
 	{
 		return this->events.emplace(event->GetEvent(), event).second;

modules/rpc/jsonrpc.cpp

@@ -26,7 +26,7 @@ class MyJSONRPCServiceInterface final
 	, public HTTPPage
 {
 private:
-	Anope::map<RPC::Event *> events;
+	RPC::Events events;
 
 	static void SendError(HTTPReply &reply, int64_t code, const Anope::string &message, const Anope::string &id)
 	{
@@ -86,6 +86,11 @@ public:
 	{
 	}
 
+	const RPC::Events &GetEvents() override
+	{
+		return events;
+	}
+
 	bool Register(RPC::Event *event) override
 	{
 		return this->events.emplace(event->GetEvent(), event).second;

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)