Bot to give a role only when a member is live

StreamRoleBot.java

/*
 * Copyright 2018 John Grosh (jagrosh).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import net.dv8tion.jda.core.AccountType;
import net.dv8tion.jda.core.JDABuilder;
import net.dv8tion.jda.core.entities.Game;
import net.dv8tion.jda.core.entities.Role;
import net.dv8tion.jda.core.events.user.UserGameUpdateEvent;
import net.dv8tion.jda.core.hooks.ListenerAdapter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author John Grosh ([email protected])
 */
public class StreamRoleBot extends ListenerAdapter
{
    private final static String FILENAME = "stream-roles.txt";
    private final static Logger LOG = LoggerFactory.getLogger(StreamRoleBot.class);
    private final List<Long> list;
    
    public StreamRoleBot() throws Exception
    {
        list = new ArrayList<>();
        Files.readAllLines(Paths.get(FILENAME), StandardCharsets.UTF_8).forEach(line ->
        {
            try
            {
                list.add(Long.parseLong(line.replace("\uFEFF", "")));
            }
            catch(Exception e)
            {
                LOG.warn("Could not parse: "+line);
            }
        });
    }

    @Override
    public void onUserGameUpdate(UserGameUpdateEvent event)
    {
        if(event.getMember()==null)
            return;
        Role role = list.stream().map(id -> event.getMember().getGuild().getRoleById(id)).filter(r -> r!=null).findFirst().orElse(null);
        if(role==null)
            return;
        if(event.getMember().getGame().getType()==Game.GameType.STREAMING)
            event.getGuild().getController().addSingleRoleToMember(event.getMember(), role).queue();
        else
            event.getGuild().getController().removeSingleRoleFromMember(event.getMember(), role).queue();
    }
    
    public static void main(String[] args) throws Exception
    {
        new JDABuilder(AccountType.BOT)
                .setToken(Files.readAllLines(Paths.get("config.txt")).get(0))
                .addEventListener(new StreamRoleBot())
                .buildAsync();
    }
}