Martin Slachta
65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
#pragma once
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#include <memory>
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#include <string>
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#include <chrono>
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#include "Address.hpp"
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#include "message_protocol/MessageEndpoint.hpp"
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#include "message_protocol/MessageConnection.hpp"
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#include "message_protocol/MessageError.hpp"
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#include <tl/expected.hpp>
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namespace tw::net {
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/**
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* Status of a server connection attempt or established connection.
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*/
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enum class ConnectionStatus { Idle, Connecting, Connected, Failed };
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/**
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* Encapsulates a connection to a game server.
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*
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* Owns the endpoint and connection, managing the state of the connection
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* attempt and providing non-blocking access to send/receive.
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*/
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class ServerConnection {
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using Clock = std::chrono::steady_clock;
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std::unique_ptr<msg::MessageEndpoint> m_endpoint;
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msg::MessageConnection* m_server = nullptr;
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Address m_address;
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ConnectionStatus m_status = ConnectionStatus::Idle;
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std::string m_error;
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Clock::time_point m_started_at;
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static constexpr std::chrono::seconds CONNECT_TIMEOUT{5};
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public:
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/**
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* Constructs a connection object for the given address, without starting I/O.
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*/
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explicit ServerConnection(Address address);
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/**
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* Starts the connection process by creating an endpoint and connecting to
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* the server. Returns an error if the endpoint cannot be created.
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*/
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tl::expected<void, msg::MessageError> start();
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/**
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* Updates the connection state: pumps the endpoint, and checks for timeout
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* or successful connection. Must be called regularly.
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*/
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void update();
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ConnectionStatus status() const;
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const std::string& error() const;
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const Address& address() const;
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msg::MessageEndpoint* endpoint() const;
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msg::MessageConnection* server() const;
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};
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}
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