iash.h

/* iash -- Internal Applicaiton SHell
 *
 * This is a library designed to provide shell functionality
 * within a terminal application.
 *
 * License: GNU GPLv3
 *
 * Copyright (C) 2014  Paul Bonnen
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef IASH_H
#define IASH_H

#define IASH_VERSION_MAJOR 0
#define IASH_VERSION_MINOR 5
#define IASH_VERSION_PATCH 0

#include <iostream>
#include <string>
#include <utility>

#include "Environment.h"
#include "CommandDispatcher.h"
#include "Directory.h"

class Command;
class UserCommand;

class iash
{
    friend class ExitCommand;
public:
    iash(const std::string &appName="iash");

    //IASH INTERNAL OBJECT RETRIEVAL *******************************************

    Environment* getEnv ();

    const Directory* getCwd () const;

    //COMMAND REGISTRATION INTERFACE *******************************************

    void addCommand (Command* cmd);

    template <typename ExtCommand, typename... Args>
    void addCommand (Args&&... args)
    {
        m_dispatcher.registerCommand<ExtCommand>(std::forward<Args>(args)...);
    }

    //SHELL INVOCATION *********************************************************
    int runInteractive ();

    int runScript (const char *fname);

    int exec (std::string &cmd);

    int exec (UserCommand *cmd);
private:
    int run (std::istream& cmdin, bool showPrompt=false);
    void exitShell ();

    CommandDispatcher m_dispatcher;
    Environment m_env;
    Directory m_iashCwd;
    std::string m_appName;
    bool m_exitFlag;
};

#endif //IASH_H