ftp_codes.cpp

#include "ftp_codes.h"
#include <sstream>

namespace ftp {

std::string default_text(Code code) {
    switch (code) {
        case Code::OpeningDataBin:   return "File status okay; about to open data connection.";
        case Code::OK:               return "Command okay.";
        case Code::SystemReady:      return "Service ready for new user.";
        case Code::Goodbye:          return "Goodbye.";
        case Code::LoggedIn:         return "User logged in, proceed.";
        case Code::FileActionOK:     return "Requested file action okay, completed.";
        case Code::ClosingData:      return "Closing data connection. Requested file action successful.";
        case Code::PathCreated:      return "\"/\" is the current directory.";
        case Code::NeedMore:         return "Requested file action pending further information.";
        case Code::CannotOpenData:   return "Can't open data connection.";
        case Code::LocalError:       return "Requested action aborted: local error in processing.";
        case Code::SyntaxError:      return "Syntax error in parameters or arguments.";
        case Code::NotImplemented:   return "Command not implemented.";
        case Code::NotLoggedIn:      return "Not logged in.";
        case Code::FileUnavailable:  return "Requested action not taken. File unavailable.";
        default:                     return "OK";
    }
}

std::string format_reply(Code code, std::string_view text) {
    std::ostringstream oss;
    oss << static_cast<int>(code) << ' ' << (text.empty() ? default_text(code) : std::string(text));
    return oss.str();
}

std::string format_pasv_reply(std::string_view ip_tuple, int p1, int p2) {
    std::ostringstream oss;
    oss << "227 Entering Passive Mode (" << ip_tuple << "," << p1 << "," << p2 << ").";

    // TODO:
    // FOR TESTING ONLY - REMOVE ME
    oss << " [DEBUG TEST PORT = " << (p1 * 256 + p2) << "]"; // --- IGNORE ---

    return oss.str();
}

} // namespace ftp