Arakne / Araknemu

 * This file is part of Araknemu.

 *

 * Araknemu is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * Araknemu 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 Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with Araknemu.  If not, see <https://www.gnu.org/licenses/>.

 *

 * Copyright (c) 2017-2021 Vincent Quatrevieux

 */

package fr.quatrevieux.araknemu.game.admin.executor;

import fr.quatrevieux.araknemu.game.admin.AdminPerformer;

import fr.quatrevieux.araknemu.game.admin.Command;

import fr.quatrevieux.araknemu.game.admin.CommandParser;

import fr.quatrevieux.araknemu.game.admin.exception.AdminException;

import fr.quatrevieux.araknemu.game.admin.exception.CommandException;

import fr.quatrevieux.araknemu.game.admin.exception.CommandPermissionsException;

import fr.quatrevieux.araknemu.game.admin.executor.argument.ArgumentsHydrator;

/**

 * Base executor using {@link ArgumentsHydrator}

 */

public final class DefaultCommandExecutor implements CommandExecutor {

    private final ArgumentsHydrator hydrator;

    @Override

    public <A> void execute(Command<A> command, AdminPerformer performer, CommandParser.Arguments arguments) throws AdminException {

        if (!performer.isGranted(command.permissions())) {

            throw new CommandPermissionsException(command.name(), command.permissions());

        }

        A args = command.createArguments();

        if (!hydrator.supports(command, args)) {

            throw new CommandException(command.name(), "Cannot parse arguments for command " + command.getClass().getSimpleName());

        }

        try {

            args = hydrator.hydrate(command, args, arguments);

        } catch (AdminException ae) {

            throw ae;

        } catch (Exception e) {

            throw new CommandException(command.name(), e.getMessage());

        }

        command.execute(performer, args);

    }

}