cppargs/include/cppargs/misc/printing.inl

#pragma once

#include <cpputils/misc/indent.h>
#include <cppargs/misc/printing.h>

namespace cppargs
{

    void printing::operator()(std::ostream& os, const group& g) const
        { print_group(os, g); }

    void printing::print_group(std::ostream& os, const group& g) const
    {
        using namespace ::utl;

        /* meta */
        if (!g.meta.name.empty())
        {
            os  << indent << "-= " << g.meta.name << " =-"
                << std::endl;
        }
        if (!g.meta.description.empty())
        {
            os  << indent << g.meta.description
                << std::endl;
        }

        os << incindent;

        /* options */
        bool has_option = false;
        for (auto& o : g.options())
        {
            if (!has_option)
                has_option = true;
            else
                os << std::endl;
            print_option(os, *o);
        }
        if (has_option)
            os << std::endl;

        os << decindent;

        /* groups */
        for (auto& i : g.groups())
        {
            print_group(os, *i);
        }
    }

    void printing::print_option(std::ostream& os, const option& o) const
    {
        using namespace ::utl;
        auto& m = o.meta;
        os  << indent;
        if (m.short_name != '\0')
            os << '-' << m.short_name;
        if (m.short_name != '\0' && !m.long_name.empty())
            os << '|';
        if (!m.long_name.empty())
            os << "--" << m.long_name;
        if (!m.arguments.empty())
            os << " " << m.arguments;
        os << incindent;
        if (!m.description.empty())
            os << indent << m.description;
        if (!m.default_value.empty())
            os << indent << "Default value: " << m.default_value;
        if (m.mandatory)
            os << indent << "This option is mandatory.";
        os << decindent;
    }

}