/**

 * Relational pipes

 * Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info)

 *

 * 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

 *

 * 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/>.

 */

#pragma once

#include <cstdlib>

#include <iostream>

#include <string>

#include <vector>

#include <algorithm>

namespace relpipe {

namespace in {

namespace cli {

class Command {

public:

	virtual ~Command() = default;

	/**

	 * Processes the inputs (stream + arguments) and generates output in the relational pipes format.

	 * 

	 * @param input usually STDIN, may not be used if all data are passed as CLI arguments

	 * @param output usually STDOUT, relational data is passed here

	 * @param command command name, usualy not needed, may be significant if the same Command instance is used for several commands

	 * @param arguments CLI arguments containing data or parameters (format is specific to each command)

	 */

	virtual void process(std::istream& input, std::ostream& output, const relpipe::writer::string_t& command, const std::vector<relpipe::writer::string_t> &arguments) = 0;

};

}

}

}