StarboardListener.java

package io.github.theglitch76.glitchbot.listener;

import net.dv8tion.jda.core.EmbedBuilder;
import net.dv8tion.jda.core.entities.Message;
import net.dv8tion.jda.core.entities.TextChannel;
import net.dv8tion.jda.core.entities.User;
import net.dv8tion.jda.core.events.message.guild.react.GuildMessageReactionAddEvent;
import net.dv8tion.jda.core.hooks.ListenerAdapter;

import java.io.FileInputStream;
import java.io.IOException;
import java.time.Instant;
import java.util.Properties;
import java.util.concurrent.TimeUnit;

/**
 * @author TheGlitch76
 */
public class StarboardListener extends ListenerAdapter {

    private long last = 0;

    @Override
    public void onGuildMessageReactionAdd(GuildMessageReactionAddEvent event) {
        if(event.getReactionEmote().getName().equals("⭐") || event.getReactionEmote().getName().equals("\uD83C\uDF1F") /*Exploding star*/
                || event.getReactionEmote().getName().equals("\uD83D\uDCAF")) {

            Properties data = new Properties();
            Message message = event.getChannel().getMessageById(event.getMessageId()).complete();
            try {
                data.load(new FileInputStream("data.dat"));
            } catch (IOException e) {
                //File doesn't exist/there was an error, no point in trying to process everything else
                e.printStackTrace();
                message.addReaction("\uD83C\uDDFD").complete();
                message.clearReactions().queueAfter(3, TimeUnit.SECONDS);
                return;
            }
            if(Instant.now().getEpochSecond() > last + 300) {
                last = Instant.now().getEpochSecond();

                User user = message.getAuthor();
                if(data.getProperty("pP11kFs9") == null) {
                    message.addReaction("\uD83C\uDDFD").complete();
                    message.clearReactions().queueAfter(3, TimeUnit.SECONDS);
                    return;
                }
                TextChannel targetChannel = event.getJDA().getTextChannelById(data.getProperty("pP11kFs9"));
                if(targetChannel == null) {
                    message.addReaction("\uD83C\uDDFD").complete();
                    message.clearReactions().queueAfter(3, TimeUnit.SECONDS);
                } else {
                    EmbedBuilder builder = new EmbedBuilder();

                    builder.setTitle(user.getName());
                    builder.setAuthor("\uD83C\uDF1F");
                    builder.setDescription(message.getContentDisplay());
                    builder.setFooter("#" + event.getChannel().getName(), user.getAvatarUrl());
                    targetChannel.sendMessage(builder.build()).complete();
                }

            }
        }

    }

}