command.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 MUTATIONOFJB_COMMAND_H
#define MUTATIONOFJB_COMMAND_H

namespace Common {
class String;
}

namespace MutationOfJB {

class Command;
class ScriptExecutionContext;
class ScriptParseContext;

class CommandParser {
public:
    virtual ~CommandParser();

    virtual bool parse(const Common::String &line, ScriptParseContext &parseCtx, Command *&command) = 0;

    virtual void transition(ScriptParseContext &parseCtx, Command *oldCommand, Command *newCommand, CommandParser *newCommandParser);

    virtual void finish(ScriptParseContext &parseCtx);
};

class Command {
public:
    enum ExecuteResult {
        None,
        Finished,
        InProgress
    };

    virtual ~Command();

    virtual ExecuteResult execute(ScriptExecutionContext &scriptExecCtx) = 0;
    virtual Command *next() const = 0;

    virtual Common::String debugString() const = 0;
};

}

#endif