xbot/connection.cpp
Eric Mertens a6b6a4179c 🐣
2023-11-22 19:59:34 -08:00

109 lines
2.7 KiB
C++

#include "connection.hpp"
auto Connection::writer_() -> void
{
std::vector<boost::asio::const_buffer> buffers;
buffers.reserve(write_strings_.size());
for (auto const& elt : write_strings_)
{
buffers.push_back(boost::asio::buffer(elt));
}
boost::asio::async_write(
stream_,
buffers,
[weak = weak_from_this()
,strings = std::move(write_strings_)
](boost::system::error_code const& error, std::size_t)
{
if (not error)
{
if (auto self = weak.lock())
{
self->writer();
}
}
});
write_strings_.clear();
}
auto Connection::writer() -> void
{
if (write_strings_.empty())
{
write_timer_.async_wait([weak = weak_from_this()](auto){
if (auto self = weak.lock())
{
if (not self->write_strings_.empty())
{
self->writer_();
}
}
});
}
else
{
writer_();
}
}
auto Connection::connect(
boost::asio::io_context & io,
Settings settings)
-> boost::asio::awaitable<void>
{
auto self = shared_from_this();
{
auto resolver = boost::asio::ip::tcp::resolver{io};
auto const endpoints = co_await resolver.async_resolve(settings.host, settings.service, boost::asio::use_awaitable);
auto const endpoint = co_await boost::asio::async_connect(stream_, endpoints, boost::asio::use_awaitable);
self->writer();
dispatch(&IrcThread::on_connect);
}
for(LineBuffer buffer{32'768};;)
{
boost::system::error_code error;
auto const n = co_await stream_.async_read_some(buffer.get_buffer(), boost::asio::redirect_error(boost::asio::use_awaitable, error));
if (error)
{
break;
}
buffer.add_bytes(n, [this](char * line) {
dispatch<ircmsg const&>(&IrcThread::on_msg, parse_irc_message(line));
});
}
dispatch(&IrcThread::on_disconnect);
}
auto Connection::write(std::string message) -> void
{
auto const need_cancel = write_strings_.empty();
message += "\r\n";
write_strings_.push_back(std::move(message));
if (need_cancel)
{
write_timer_.cancel_one();
}
}
auto Connection::write(std::string front, std::string_view last) -> void
{
auto const is_invalid = [](char x) -> bool {
return x == '\0' || x == '\r' || x == '\n';
};
if (last.end() != std::find_if(last.begin(), last.end(), is_invalid))
{
throw std::runtime_error{"bad irc argument"};
}
front += " :";
front += last;
write(std::move(front));
}