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#pragma once
#include "websocket.hpp"
#include <nlohmann/json.hpp>
#include <thread>
enum class GatewayOp : int {
Heartbeat = 1,
Hello = 10,
HeartbeatAck = 11,
};
struct GatewayMessage {
GatewayOp Opcode;
nlohmann::json Data;
std::string Type;
friend void from_json(const nlohmann::json &j, GatewayMessage &m);
};
struct HelloMessageData {
int HeartbeatInterval;
friend void from_json(const nlohmann::json &j, HelloMessageData &m);
};
struct HeartbeatMessage : GatewayMessage {
int Sequence;
friend void to_json(nlohmann::json &j, const HeartbeatMessage &m);
};
// https://stackoverflow.com/questions/29775153/stopping-long-sleep-threads/29775639#29775639
class HeartbeatWaiter {
public:
template<class R, class P>
bool wait_for(std::chrono::duration<R, P> const &time) const {
std::unique_lock<std::mutex> lock(m);
return !cv.wait_for(lock, time, [&] { return terminate; });
}
void kill() {
std::unique_lock<std::mutex> lock(m);
terminate = true;
cv.notify_all();
}
private:
mutable std::condition_variable cv;
mutable std::mutex m;
bool terminate = false;
};
class DiscordClient {
public:
static const constexpr char *DiscordGateway = "wss://gateway.discord.gg/?v=6&encoding=json";
static const constexpr char *DiscordAPI = "https://discord.com/api";
public:
DiscordClient();
void Start();
void Stop();
bool IsStarted() const;
private:
void HandleGatewayMessage(nlohmann::json msg);
void HeartbeatThread();
Websocket m_websocket;
bool m_client_connected = false;
std::thread m_heartbeat_thread;
int m_last_sequence = -1;
int m_heartbeat_msec = 0;
HeartbeatWaiter m_heartbeat_waiter;
bool m_heartbeat_acked = true;
};
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