notify-on-start/src/main/java/moe/sob/Utils.java

package moe.sob;

import org.bukkit.Bukkit;
import org.bukkit.entity.Player;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.URL;

public class Utils {
    public static String getActivePlayers() {
        var players = Bukkit.getServer().getOnlinePlayers();
        String activePlayers;
        if (players.size() < 1) {
            activePlayers = "None.";
        } else {
            activePlayers = "";
            int playersCounted = 0;
            for (Player player : players) {
                playersCounted++;
                activePlayers = "%s\n%s) %s".formatted(activePlayers, playersCounted, player.getName());
            }
        }
        return activePlayers;
    }

    public static String getServerHostPublicIP() {
        String urlString = "http://myexternalip.com/raw";
        try {
            URL url = new URL(urlString);
            try (BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()))) {
                return br.readLine();
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static String getServerPing(String address) {
        try {
            int timeout = 3000;
            long startTime = System.currentTimeMillis();
            InetAddress serverAddress = InetAddress.getByName(address);
            boolean reachable = serverAddress.isReachable(timeout);
            long endTime = System.currentTimeMillis();
            long latency = endTime - startTime;
            if (reachable) {
                return String.valueOf(latency);
            } else {
                return "404svh";
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}