MissileWars/src/de/steamwar/misslewars/MWTeam.java

package de.steamwar.misslewars;

import org.bukkit.*;
import org.bukkit.enchantments.Enchantment;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.scoreboard.Team;

import java.util.HashSet;
import java.util.Objects;
import java.util.Set;

public class MWTeam {
	private static final ItemStack bow = new ItemStack(Material.BOW);

	static {
		ItemMeta bowMeta = Objects.requireNonNull(bow.getItemMeta());
		bowMeta.addEnchant(Enchantment.ARROW_FIRE, 1, false);
		bowMeta.setUnbreakable(true);
		bow.setItemMeta(bowMeta);
	}

	private final ChatColor color;
	private final String teamName;
	private final Team sbteam; //scoreboard-Team
	private final Location spawn;
	private final int portalZ;

	private Set<Player> players = new HashSet<>();
	
	public Set<Player> getPlayers(){
		return players;
	}
	
	MWTeam(ChatColor color, Location spawn, String teamName, int portalZ) {
		this.teamName = teamName;
		this.color = color;
		this.spawn = spawn;
		this.portalZ = portalZ;
		if(FightScoreboard.getScoreboard().getTeam(teamName) == null)
            sbteam = FightScoreboard.getScoreboard().registerNewTeam(teamName);
        else
            sbteam = FightScoreboard.getScoreboard().getTeam(teamName);
        assert sbteam != null;
        sbteam.setAllowFriendlyFire(false);
        sbteam.setColor(color);
	}

	public int getPortalZ() {
		return portalZ;
	}

	public Location getSpawn(){
		return spawn;
	}

	public void join (Player p) {
		players.add(p);
		p.teleport(spawn);
		Bukkit.getScheduler().runTaskLater(MissileWars.getPlugin(), () -> p.setGameMode(GameMode.SURVIVAL), 1);
		p.getInventory().setItem(0, bow);
		sbteam.addPlayer(p);
		p.setDisplayName(color + p.getName());
		if (MissileWars.getFightState() == FightState.WAITING && !enemy().getPlayers().isEmpty())
			MissileWars.startRound();
	}
	
	public void leave (Player p) {
		if(!players.contains(p))
			return;

		players.remove(p);
		sbteam.removePlayer(p);
		if (players.isEmpty() && MissileWars.getFightState() == FightState.FIGHTING)
			MissileWars.end(WinReasons.NO_ENEMY, enemy());
	}
	
	private MWTeam enemy() {
		if (this == MissileWars.getRedTeam())
			return MissileWars.getBlueTeam();

		return MissileWars.getRedTeam();
	}
	
	public String getPrefix(){
		return "§" + color.getChar();
	}
	
	public boolean hasPlayer (Player p) {
		return players.contains(p);
	}

	public String getColoredName() {
		return color.toString() + teamName;
	}
}