command-parser.hpp

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

#include "command-definition.hpp"
#include "execute-command.hpp"
#include <type_traits>

namespace nfd {
namespace tools {
namespace nfdc {

enum AvailableIn : uint8_t {
  AVAILABLE_IN_NONE     = 0,
  AVAILABLE_IN_ONE_SHOT = 1 << 0, 
  AVAILABLE_IN_BATCH    = 1 << 1, 
  AVAILABLE_IN_HELP     = 1 << 7, 
  AVAILABLE_IN_ALL      = 0xff
};

std::ostream&
operator<<(std::ostream& os, AvailableIn modes);

enum class ParseMode : uint8_t {
  ONE_SHOT = AVAILABLE_IN_ONE_SHOT, 
  BATCH    = AVAILABLE_IN_BATCH     
};

std::ostream&
operator<<(std::ostream& os, ParseMode mode);

class CommandParser : noncopyable
{
public:
  class Error : public std::invalid_argument
  {
  public:
    explicit
    Error(const std::string& what)
      : std::invalid_argument(what)
    {
    }
  };

  CommandParser&
  addCommand(const CommandDefinition& def, const ExecuteCommand& execute,
             std::underlying_type<AvailableIn>::type modes = AVAILABLE_IN_ALL);

  CommandParser&
  addAlias(const std::string& noun, const std::string& verb, const std::string& verb2);

  std::vector<const CommandDefinition*>
  listCommands(const std::string& noun, ParseMode mode) const;

  std::tuple<std::string, std::string, CommandArguments, ExecuteCommand>
  parse(const std::vector<std::string>& tokens, ParseMode mode) const;

private:
  typedef std::pair<std::string, std::string> CommandName;

  struct Command
  {
    CommandDefinition def;
    ExecuteCommand execute;
    AvailableIn modes;
  };

  typedef std::map<CommandName, shared_ptr<Command>> CommandContainer;
  CommandContainer m_commands;

  std::vector<CommandContainer::const_iterator> m_commandOrder;
};

} // namespace nfdc
} // namespace tools
} // namespace nfd

#endif // NFD_TOOLS_NFDC_COMMAND_PARSER_HPP