chat_printer.h

// Copyright 2023-2025 The Aerospace Corporation.
// This file is a part of SatCat5, licensed under CERN-OHL-W v2 or later.
// Callback object that prints incoming "ChatProto" messages
 
#pragma once
 
#include <satcat5/eth_dispatch.h>
#include <satcat5/io_core.h>
#include <string>
 
namespace satcat5 {
    namespace eth {
        // Prototype for the ChatProto class.
        class ChatProto;
    }
 
    namespace util {
        class ChatPrinter final
            : public satcat5::net::Protocol
            , public satcat5::io::Writeable
        {
        public:
            ChatPrinter(satcat5::eth::ChatProto* chat, bool loopback=true);
            ~ChatPrinter();
 
            void send_message(const std::string& msg);
 
        private:
            void print_message(
                const satcat5::eth::MacAddr& from,
                const std::string& msg);
 
            void frame_rcvd(satcat5::io::LimitedRead& rd) override;
 
            unsigned get_write_space() const override;
            void write_next(u8 ch);
            bool write_finalize() override;
 
            // Internal state.
            satcat5::eth::ChatProto* const m_chat;
            std::string m_line;
            bool m_loopback;
        };
    }
}