Util.java

/**
 * This file is part of Oracle, licensed under the MIT License (MIT).
 *
 * Copyright (c) 2015 Helion3 http://helion3.com/
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.helion3.oracle.utils;

import java.util.Optional;

import org.spongepowered.api.command.CommandSource;
import org.spongepowered.api.entity.living.player.User;
import org.spongepowered.api.service.user.UserStorageService;

import com.helion3.oracle.Oracle;

public class Util {
    private Util() {}

    public static Optional<User> getUser(CommandSource source, Optional<String> username) {
        User user = null;
        if (username.isPresent() && !username.get().isEmpty()) {
            Optional<UserStorageService> userStorage = Oracle.getGame().getServiceManager().provide(UserStorageService.class);
            if (userStorage.isPresent()) {
                Optional<User> optionalUser = userStorage.get().get(username.get());
                if (optionalUser.isPresent()) {
                    user = optionalUser.get();
                }
            }
        }
        else if (source instanceof User) {
            user = (User) source;
        }

        return Optional.ofNullable(user);
    }
}