Duckstation/dep/discord-rpc/src/rpc_connection.h

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2020-04-30 15:01:42 +00:00
#pragma once
#include "connection.h"
#include "serialization.h"
// I took this from the buffer size libuv uses for named pipes; I suspect ours would usually be much
// smaller.
constexpr size_t MaxRpcFrameSize = 64 * 1024;
struct RpcConnection {
enum class ErrorCode : int {
Success = 0,
PipeClosed = 1,
ReadCorrupt = 2,
};
enum class Opcode : uint32_t {
Handshake = 0,
Frame = 1,
Close = 2,
Ping = 3,
Pong = 4,
};
struct MessageFrameHeader {
Opcode opcode;
uint32_t length;
};
struct MessageFrame : public MessageFrameHeader {
char message[MaxRpcFrameSize - sizeof(MessageFrameHeader)];
};
enum class State : uint32_t {
Disconnected,
SentHandshake,
AwaitingResponse,
Connected,
};
BaseConnection* connection{nullptr};
State state{State::Disconnected};
void (*onConnect)(JsonDocument& message){nullptr};
void (*onDisconnect)(int errorCode, const char* message){nullptr};
char appId[64]{};
int lastErrorCode{0};
char lastErrorMessage[256]{};
RpcConnection::MessageFrame sendFrame;
static RpcConnection* Create(const char* applicationId);
static void Destroy(RpcConnection*&);
inline bool IsOpen() const { return state == State::Connected; }
void Open();
void Close();
bool Write(const void* data, size_t length);
bool Read(JsonDocument& message);
};