extras/src/main/java/pw/kaboom/extras/commands/CommandJumpscare.java

package pw.kaboom.extras.commands;

import net.kyori.adventure.text.Component;
import net.kyori.adventure.text.format.NamedTextColor;
import org.bukkit.Bukkit;
import org.bukkit.Particle;
import org.bukkit.Sound;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import javax.annotation.Nonnull;

public final class CommandJumpscare implements CommandExecutor {
    private void createJumpscare(final Player player) {
        final int count = 4;
        player.spawnParticle(Particle.MOB_APPEARANCE, player.getLocation(), count);

        final int maxIterator = 10;
        for (int i = 0; i <= maxIterator; i++) {
            player.playSound(player.getLocation(), Sound.ENTITY_ENDERMAN_SCREAM, 1, 0);
        }
    }

    public boolean onCommand(final @Nonnull CommandSender sender,
                             final @Nonnull Command command,
                             final @Nonnull String label,
                             final String[] args) {
        if (args.length == 0) {
            sender.sendMessage(Component
                    .text("Usage: /" + label + " <player>",
                            NamedTextColor.RED));
            return true;
        }

        if (args[0].equals("*") || args[0].equals("**")) {
            for (Player onlinePlayer : Bukkit.getOnlinePlayers()) {
                createJumpscare(onlinePlayer);
            }
            sender.sendMessage(Component
                    .text("Successfully created jumpscare for every player"));
            return true;
        }

        final Player target = Bukkit.getPlayer(args[0]);

        if (target == null) {
            sender.sendMessage(
                Component.text("Player \"")
                    .append(Component.text(args[0]))
                    .append(Component.text("\" not found"))
            );
            return true;
        }

        createJumpscare(target);
        sender.sendMessage(
            Component.text("Successfully created jumpscare for player \"")
                .append(Component.text(target.getName()))
                .append(Component.text("\""))
        );
        return true;
    }
}