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/*
*
* (C) 2010-2025 Anope Team
* Contact us at team@anope.org
*
* Please read COPYING and README for further details.
*/
#pragma once
#include "httpd.h"
#include <variant>
namespace RPC
{
class Array;
class Event;
class Map;
class Request;
class ServiceInterface;
class Value;
/** Represents possible types of RPC value. */
using ValueUnion = std::variant<Array, Map, Anope::string, std::nullptr_t, bool, double, int64_t, uint64_t>;
/** Represents standard RPC errors from the JSON-RPC and XML-RPC specifications. */
enum Error
: int64_t
{
ERR_CUSTOM_END = -32000,
ERR_CUSTOM_START = -32099,
ERR_PARSE_ERROR = -32700,
ERR_INVALID_REQUEST = -32600,
ERR_METHOD_NOT_FOUND = -32601,
ERR_INVALID_PARAMS = -32602,
};
}
class RPC::Array final
{
private:
std::vector<Value> replies;
public:
/** Retrieves the list of RPC replies. */
inline const auto &GetReplies() const { return this->replies; }
template <typename T>
inline Array &Reply(const T &t)
{
this->replies.emplace_back(RPC::Value(t));
return *this;
}
inline Array &ReplyArray();
inline Map &ReplyMap();
};
class RPC::Map final
{
private:
Anope::map<Value> replies;
public:
/** Retrieves the list of RPC replies. */
inline const auto &GetReplies() const { return this->replies; }
template <typename T>
inline Map &Reply(const Anope::string &key, const T &t)
{
this->replies.emplace(key, RPC::Value(t));
return *this;
}
inline Array &ReplyArray(const Anope::string &key);
inline Map &ReplyMap(const Anope::string &key);
};
class RPC::Value final
{
private:
RPC::ValueUnion value;
public:
explicit Value(const ValueUnion &v)
: value(v)
{
}
explicit Value(const Array &a)
: value(a)
{
}
explicit Value(const Map &m)
: value(m)
{
}
explicit Value(std::nullptr_t)
: value(nullptr)
{
}
explicit Value(bool b)
: value(b)
{
}
Value(double d)
: value(d)
{
}
Value(int64_t i)
: value(i)
{
}
Value(uint64_t u)
: value(u)
{
}
template <typename T>
Value(const T &t)
: value(Anope::ToString(t))
{
}
inline auto &Get() { return this->value; }
inline const auto &Get() const { return this->value; }
};
class RPC::Request final
{
private:
std::optional<std::pair<int64_t, Anope::string>> error;
std::optional<Value> root;
public:
Anope::string name;
Anope::string id;
std::deque<Anope::string> data;
HTTPReply &reply;
Request(HTTPReply &r)
: reply(r)
{
}
inline void Error(uint64_t errcode, const Anope::string &errstr)
{
this->error.emplace(errcode, errstr);
}
template<typename T = Map>
inline T &Root();
inline const auto &GetError() const { return this->error; }
inline const auto &GetRoot() const { return this->root; }
};
#define RPC_EVENT "RPC::Event"
class RPC::Event
: public Service
{
private:
size_t minparams;
protected:
Event(Module *o, const Anope::string& e, size_t mp = 0)
: Service(o, RPC_EVENT, e)
, minparams(mp)
{
}
public:
virtual ~Event() = default;
const auto &GetMinParams() const { return minparams; }
virtual bool Run(ServiceInterface *iface, HTTPClient *client, Request &request) = 0;
};
class RPC::ServiceInterface
: public Service
{
public:
ServiceInterface(Module *creator)
: Service(creator, "RPC::ServiceInterface", "rpc")
{
}
virtual void Reply(Request &request) = 0;
};
inline RPC::Array &RPC::Array::ReplyArray()
{
auto &reply = this->replies.emplace_back(RPC::Array());
return std::get<RPC::Array>(reply.Get());
}
inline RPC::Map &RPC::Array::ReplyMap()
{
auto &reply = this->replies.emplace_back(RPC::Map());
return std::get<RPC::Map>(reply.Get());
}
inline RPC::Array &RPC::Map::ReplyArray(const Anope::string &key)
{
auto it = this->replies.emplace(key, RPC::Array());
return std::get<RPC::Array>(it.first->second.Get());
}
inline RPC::Map &RPC::Map::ReplyMap(const Anope::string &key)
{
auto it = this->replies.emplace(key, RPC::Map());
return std::get<RPC::Map>(it.first->second.Get());
}
template<typename T>
inline T &RPC::Request::Root()
{
if (!this->root.has_value())
this->root = RPC::Value(T());
return std::get<T>(this->root.value().Get());
}
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