scene_rpc_interface.h

/**************************************************************************/
/*  scene_rpc_interface.h                                                 */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#pragma once

#include "core/object/ref_counted.h"
#include "scene/main/multiplayer_api.h"

class SceneMultiplayer;
class SceneCacheInterface;
class SceneReplicationInterface;
class Node;

class SceneRPCInterface : public RefCounted {
	GDCLASS(SceneRPCInterface, RefCounted);

private:
	struct RPCConfig {
		StringName name;
		MultiplayerAPI::RPCMode rpc_mode = MultiplayerAPI::RPC_MODE_DISABLED;
		bool call_local = false;
		MultiplayerPeer::TransferMode transfer_mode = MultiplayerPeer::TRANSFER_MODE_RELIABLE;
		int channel = 0;

		bool operator==(RPCConfig const &p_other) const {
			return name == p_other.name;
		}
	};

	struct RPCConfigCache {
		HashMap<uint16_t, RPCConfig> configs;
		HashMap<StringName, uint16_t> ids;
	};

	struct SortRPCConfig {
		StringName::AlphCompare compare;
		bool operator()(const RPCConfig &p_a, const RPCConfig &p_b) const {
			return compare(p_a.name, p_b.name);
		}
	};

	enum NetworkNodeIdCompression {
		NETWORK_NODE_ID_COMPRESSION_8 = 0,
		NETWORK_NODE_ID_COMPRESSION_16,
		NETWORK_NODE_ID_COMPRESSION_32,
	};

	enum NetworkNameIdCompression {
		NETWORK_NAME_ID_COMPRESSION_8 = 0,
		NETWORK_NAME_ID_COMPRESSION_16,
	};

	SceneMultiplayer *multiplayer = nullptr;
	SceneCacheInterface *multiplayer_cache = nullptr;
	SceneReplicationInterface *multiplayer_replicator = nullptr;

	Vector<uint8_t> packet_cache;

	HashMap<ObjectID, RPCConfigCache> rpc_cache;

#ifdef DEBUG_ENABLED
	_FORCE_INLINE_ void _profile_node_data(const String &p_what, ObjectID p_id, int p_size);
#endif

protected:
	void _process_rpc(Node *p_node, const uint16_t p_rpc_method_id, int p_from, const uint8_t *p_packet, int p_packet_len, int p_offset);

	void _send_rpc(Node *p_from, int p_to, uint16_t p_rpc_id, const RPCConfig &p_config, const StringName &p_name, const Variant **p_arg, int p_argcount);
	Node *_process_get_node(int p_from, const uint8_t *p_packet, uint32_t p_node_target, int p_packet_len);

	void _parse_rpc_config(const Variant &p_config, bool p_for_node, RPCConfigCache &r_cache);
	const RPCConfigCache &_get_node_config(const Node *p_node);

public:
	Error rpcp(Object *p_obj, int p_peer_id, const StringName &p_method, const Variant **p_arg, int p_argcount);
	void process_rpc(int p_from, const uint8_t *p_packet, int p_packet_len);
	String get_rpc_md5(const Object *p_obj);

	SceneRPCInterface(SceneMultiplayer *p_multiplayer, SceneCacheInterface *p_cache, SceneReplicationInterface *p_replicator) {
		multiplayer = p_multiplayer;
		multiplayer_cache = p_cache;
		multiplayer_replicator = p_replicator;
	}
};