Added player limiter

src/main/java/eu/mhsl/craftattack/spawn/Main.java

@@ -39,6 +39,7 @@ public final class Main extends JavaPlugin {
                 new Report(),
                 new Event(),
                 new Help(),
+                new PlayerLimit(),
                 new Debug()
         );
         Bukkit.getLogger().info("Loading appliances...");

src/main/java/eu/mhsl/craftattack/spawn/appliances/playerlimit/PlayerLimit.java

@@ -0,0 +1,47 @@
+package eu.mhsl.craftattack.spawn.appliances.playerlimit;
+
+import eu.mhsl.craftattack.spawn.Main;
+import eu.mhsl.craftattack.spawn.appliance.Appliance;
+import eu.mhsl.craftattack.spawn.appliance.ApplianceCommand;
+import eu.mhsl.craftattack.spawn.appliances.playerlimit.command.SetPlayerLimitCommand;
+import eu.mhsl.craftattack.spawn.appliances.playerlimit.listener.PlayerJoinLimiterListener;
+import eu.mhsl.craftattack.spawn.config.Configuration;
+import org.bukkit.Bukkit;
+import org.bukkit.event.Listener;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+public class PlayerLimit extends Appliance {
+    private static final String playerLimitKey = "maxPlayers";
+    private int limit;
+    public PlayerLimit() {
+        super("playerLimit");
+        this.limit = localConfig().getInt(playerLimitKey);
+        Bukkit.setMaxPlayers(Integer.MAX_VALUE);
+    }
+
+    public void setPlayerLimit(int limit) {
+        this.limit = limit;
+        localConfig().set(playerLimitKey, limit);
+        Configuration.saveChanges();
+    }
+
+    public int getLimit() {
+        return limit;
+    }
+
+    @Override
+    protected @NotNull List<Listener> eventHandlers() {
+        return List.of(
+                new PlayerJoinLimiterListener()
+        );
+    }
+
+    @Override
+    protected @NotNull List<ApplianceCommand<?>> commands() {
+        return List.of(
+                new SetPlayerLimitCommand()
+        );
+    }
+}

src/main/java/eu/mhsl/craftattack/spawn/appliances/playerlimit/command/SetPlayerLimitCommand.java

@@ -0,0 +1,18 @@
+package eu.mhsl.craftattack.spawn.appliances.playerlimit.command;
+
+import eu.mhsl.craftattack.spawn.appliance.ApplianceCommand;
+import eu.mhsl.craftattack.spawn.appliances.playerlimit.PlayerLimit;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+
+public class SetPlayerLimitCommand extends ApplianceCommand<PlayerLimit> {
+    public SetPlayerLimitCommand() {
+        super("setPlayerLimit");
+    }
+
+    @Override
+    protected void execute(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
+        getAppliance().setPlayerLimit(Integer.parseInt(args[0]));
+    }
+}

src/main/java/eu/mhsl/craftattack/spawn/appliances/playerlimit/listener/PlayerJoinLimiterListener.java

@@ -0,0 +1,18 @@
+package eu.mhsl.craftattack.spawn.appliances.playerlimit.listener;
+
+import eu.mhsl.craftattack.spawn.appliance.ApplianceListener;
+import eu.mhsl.craftattack.spawn.appliances.playerlimit.PlayerLimit;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import org.bukkit.Bukkit;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.player.AsyncPlayerPreLoginEvent;
+import org.bukkit.event.player.PlayerLoginEvent;
+
+public class PlayerJoinLimiterListener extends ApplianceListener<PlayerLimit> {
+    @EventHandler
+    public void onLogin(PlayerLoginEvent playerPreLoginEvent) {
+        playerPreLoginEvent.kickMessage(Component.text("Der Server ist derzeit voll! Versuche es bitte später erneut.", NamedTextColor.RED));
+        if(Bukkit.getOnlinePlayers().size() >= getAppliance().getLimit()) playerPreLoginEvent.setResult(PlayerLoginEvent.Result.KICK_FULL);
+    }
+}

src/main/java/eu/mhsl/craftattack/spawn/appliances/whitelist/PlayerJoinListener.java

@@ -0,0 +1,12 @@
+package eu.mhsl.craftattack.spawn.appliances.whitelist;
+
+import eu.mhsl.craftattack.spawn.appliance.ApplianceListener;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.player.AsyncPlayerPreLoginEvent;
+
+public class PlayerJoinListener extends ApplianceListener<Whitelist> {
+    @EventHandler
+    public void preLoginEvent(AsyncPlayerPreLoginEvent preLoginEvent) {
+
+    }
+}

src/main/resources/plugin.yml

@@ -29,3 +29,4 @@ commands:
     aliases: ["ts"]
   discord:
     aliases: ["dc"]
+  setPlayerLimit: