#include "Rot13Handler.hpp"

namespace
{
    /**
     * @brief Convert a char to its rot13 value.
     *
     * @param [in] c The char to encode.
     *
     * @return The encoded char.
     */
    char    Rot13Char(char c)
    {
        if ((c >= ('a' + 13) && c <= 'z') || (c >= ('A' + 13) && c <= 'Z' ))
            c -= 13;
        else if ((c >= 'a' && c < 'a' + 13) || (c >= 'A' && c < 'A' + 13))
            c += 13;
        return (c);
    }
};

zia::api::handler::EHook    Rot13Handler::getHook(void) const
{
    return (zia::api::handler::ResponseBodyModifier);
}

zia::api::handler::ECode    Rot13Handler::operator()(zia::api::http::ITransaction &, std::istream &, std::ostream &)
{
    return (zia::api::handler::Ok);
}

zia::api::handler::ECode    Rot13Handler::operator()(std::istream & is, std::ostream & os)
{
    while (!is.eof())
    {
        char c;
        is.get(c);
        os << Rot13Char(c);
    }

    return (zia::api::handler::Ok);
}