config-file.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef NFD_CORE_CONFIG_FILE_HPP
#define NFD_CORE_CONFIG_FILE_HPP

#include "common.hpp"

#include <boost/property_tree/ptree.hpp>

namespace nfd {

typedef boost::property_tree::ptree ConfigSection;

typedef function<void(const ConfigSection& /*section*/,
                      bool /*isDryRun*/,
                      const std::string& /*filename*/)> ConfigSectionHandler;

typedef function<void(const std::string& /*filename*/,
                      const std::string& /*sectionName*/,
                      const ConfigSection& /*section*/,
                      bool /*isDryRun*/)> UnknownConfigSectionHandler;

class ConfigFile : noncopyable
{
public:

  class Error : public std::runtime_error
  {
  public:
    explicit
    Error(const std::string& what)
      : std::runtime_error(what)
    {

    }
  };

  ConfigFile(UnknownConfigSectionHandler unknownSectionCallback = throwErrorOnUnknownSection);

  static void
  throwErrorOnUnknownSection(const std::string& filename,
                             const std::string& sectionName,
                             const ConfigSection& section,
                             bool isDryRun);

  static void
  ignoreUnknownSection(const std::string& filename,
                       const std::string& sectionName,
                       const ConfigSection& section,
                       bool isDryRun);

  void
  addSectionHandler(const std::string& sectionName,
                    ConfigSectionHandler subscriber);


  void
  parse(const std::string& filename, bool isDryRun);

  void
  parse(const std::string& input, bool isDryRun, const std::string& filename);

  void
  parse(std::istream& input, bool isDryRun, const std::string& filename);

  void
  parse(const ConfigSection& config, bool isDryRun, const std::string& filename);

private:

  void
  process(bool isDryRun, const std::string& filename);

private:
  UnknownConfigSectionHandler m_unknownSectionCallback;

  typedef std::map<std::string, ConfigSectionHandler> SubscriptionTable;

  SubscriptionTable m_subscriptions;

  ConfigSection m_global;
};

} // namespace nfd


#endif // NFD_CORE_CONFIG_FILE_HPP