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) 2017-2020 Vincent Quatrevieux

 */

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

import fr.quatrevieux.araknemu.core.event.Listener;

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

import fr.quatrevieux.araknemu.game.admin.account.AccountContextResolver;

import fr.quatrevieux.araknemu.game.admin.context.AbstractContextConfigurator;

import fr.quatrevieux.araknemu.game.admin.context.ConfigurableContextResolver;

import fr.quatrevieux.araknemu.game.admin.context.Context;

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

import fr.quatrevieux.araknemu.game.handler.event.Disconnected;

import fr.quatrevieux.araknemu.game.player.GamePlayer;

import fr.quatrevieux.araknemu.game.player.PlayerService;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.NoSuchElementException;

import java.util.function.Supplier;

/**

 * Context resolver for player

 */

public final class PlayerContextResolver implements ConfigurableContextResolver<PlayerContext> {

    private final PlayerService service;

    private final AccountContextResolver accountContextResolver;

    private final List<AbstractContextConfigurator<PlayerContext>> configurators = new ArrayList<>();

    private final Map<GamePlayer, PlayerContext> contexts = new HashMap<>();

    public PlayerContextResolver(PlayerService service, AccountContextResolver accountContextResolver) {

        this.service = service;

        this.accountContextResolver = accountContextResolver;

    }

    @Override

    public Context resolve(AdminPerformer performer, Supplier<String> argument) throws ContextException {

        final String name = argument.get();

        try {

            return resolve(service.get(name));

        } catch (NoSuchElementException e) {

            throw new ContextException("Cannot found the player " + name);

        }

    }

    @Override

    public char prefix() {

        return '@';

    }

    @Override

    public PlayerContextResolver register(AbstractContextConfigurator<PlayerContext> configurator) {

        configurators.add(configurator);

        return this;

    }

    /**

     * Create the context from the given player instance

     *

     * @param player The player instance

     *

     * @return The created context

     */

    public PlayerContext resolve(GamePlayer player) throws ContextException {

        return contexts.computeIfAbsent(player, key -> {

            final PlayerContext context = new PlayerContext(

                player,

                accountContextResolver.resolve(player.account()),

                configurators

            );

            configurePlayerListener(player);

            return context;

        });

    }

    /**

     * Register listener on player dispatch for free cached context on disconnect

     */

    private void configurePlayerListener(GamePlayer player) {

        player.dispatcher().add(new Listener<Disconnected>() {

            @Override

            public Class<Disconnected> event() {

                return Disconnected.class;

            }

        });

    }

}