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// Copyright (c) 2019 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "math-server" project.
// For details, see https://github.com/egor-tensin/math-server.
// Distributed under the MIT License.
#pragma once
#include "transport.hpp"
#include <boost/filesystem.hpp>
#include <boost/program_options.hpp>
#include <exception>
#include <iostream>
#include <string>
#include <vector>
namespace math::client {
struct Settings {
std::string m_input;
std::string m_host;
std::string m_port;
std::vector<std::string> m_files;
bool exit_with_usage() const { return m_vm.count("help"); }
bool input_from_string() const {
return m_vm.count("command");
}
bool input_from_files() const {
return !input_from_string() && !m_files.empty();
}
bool input_from_console() const {
return !input_from_string() && !input_from_files();
}
boost::program_options::variables_map m_vm;
};
class SettingsParser {
public:
explicit SettingsParser(const std::string& argv0)
: m_prog_name{extract_filename(argv0)}
{
m_visible.add_options()("help,h", "show this message and exit");
m_visible.add_options()(
"command,c",
boost::program_options::value(&m_settings.m_input),
"evaluate the argument expression and exit");
m_visible.add_options()(
"host,H",
boost::program_options::value(&m_settings.m_host)->default_value("localhost"),
"server host address");
m_visible.add_options()(
"port,p",
boost::program_options::value(&m_settings.m_port)->default_value(NetworkTransport::DEFAULT_PORT),
"server port number");
m_hidden.add_options()(
"files",
boost::program_options::value<std::vector<std::string>>(&m_settings.m_files),
"shouldn't be visible");
m_positional.add("files", -1);
}
static const char* get_short_description() {
return "[-h|--help] [-c|--command arg] [-H|--host] [-p|--port] [file...]";
}
Settings parse(int argc, char* argv[]) {
boost::program_options::options_description all;
all.add(m_hidden).add(m_visible);
boost::program_options::store(
boost::program_options::command_line_parser{argc, argv}
.options(all)
.positional(m_positional)
.run(),
m_settings.m_vm);
if (m_settings.exit_with_usage()) {
return m_settings;
}
boost::program_options::notify(m_settings.m_vm);
return m_settings;
}
void usage() const {
std::cout << *this;
}
void usage_error(const std::exception& e) const {
std::cerr << "usage error: " << e.what() << '\n';
std::cerr << *this;
}
private:
static std::string extract_filename(const std::string& path) {
return boost::filesystem::path{path}.filename().string();
}
const std::string m_prog_name;
boost::program_options::options_description m_hidden;
boost::program_options::options_description m_visible;
boost::program_options::positional_options_description m_positional;
Settings m_settings;
friend std::ostream& operator<<(std::ostream& os, const SettingsParser& parser) {
os << "usage: " << parser.m_prog_name << ' ' << get_short_description() << '\n';
os << parser.m_visible;
return os;
}
};
}
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