added maintenance mode

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

@@ -18,6 +18,7 @@ import eu.mhsl.craftattack.spawn.appliances.help.Help;
 import eu.mhsl.craftattack.spawn.appliances.hotbarRefill.HotbarRefill;
 import eu.mhsl.craftattack.spawn.appliances.kick.Kick;
 import eu.mhsl.craftattack.spawn.appliances.knockDoor.KnockDoor;
+import eu.mhsl.craftattack.spawn.appliances.maintenance.Maintenance;
 import eu.mhsl.craftattack.spawn.appliances.outlawed.Outlawed;
 import eu.mhsl.craftattack.spawn.appliances.packSelect.PackSelect;
 import eu.mhsl.craftattack.spawn.appliances.panicBan.PanicBan;
@@ -85,7 +86,8 @@ public final class Main extends JavaPlugin {
             new DoubleDoor(),
             new KnockDoor(),
             new PackSelect(),
-            new GlowingBerries()
+            new GlowingBerries(),
+            new Maintenance()
         )
             .filter(appliance -> disabledAppliances.stream()
                 .noneMatch(s -> s.equalsIgnoreCase(appliance.getClass().getSimpleName())))

src/main/java/eu/mhsl/craftattack/spawn/appliance/Appliance.java

@@ -72,7 +72,8 @@ public abstract class Appliance {
      */
     @NotNull
     public ConfigurationSection localConfig() {
-        return Optional.ofNullable(Configuration.cfg.getConfigurationSection(localConfigPath)).orElse(Configuration.cfg);
+        return Optional.ofNullable(Configuration.cfg.getConfigurationSection(localConfigPath))
+            .orElseGet(() -> Configuration.cfg.createSection(localConfigPath));
     }
 
     public void onEnable() {

src/main/java/eu/mhsl/craftattack/spawn/appliances/maintenance/Maintenance.java

@@ -0,0 +1,43 @@
+package eu.mhsl.craftattack.spawn.appliances.maintenance;
+
+import eu.mhsl.craftattack.spawn.appliance.Appliance;
+import eu.mhsl.craftattack.spawn.appliance.ApplianceCommand;
+import eu.mhsl.craftattack.spawn.config.Configuration;
+import org.bukkit.event.Listener;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+public class Maintenance extends Appliance {
+    private boolean isInMaintenance;
+    private final String configKey = "enabled";
+
+    public Maintenance() {
+        super("maintenance");
+    }
+
+    @Override
+    public void onEnable() {
+        this.isInMaintenance = localConfig().getBoolean(configKey, false);
+    }
+
+    public void setState(boolean enabled) {
+        this.isInMaintenance = enabled;
+        localConfig().set(configKey, enabled);
+        Configuration.saveChanges();
+    }
+
+    public boolean isInMaintenance() {
+        return isInMaintenance;
+    }
+
+    @Override
+    protected @NotNull List<ApplianceCommand<?>> commands() {
+        return List.of(new MaintenanceCommand());
+    }
+
+    @Override
+    protected @NotNull List<Listener> listeners() {
+        return List.of(new PreventMaintenanceJoinListener());
+    }
+}

src/main/java/eu/mhsl/craftattack/spawn/appliances/maintenance/MaintenanceCommand.java

@@ -0,0 +1,22 @@
+package eu.mhsl.craftattack.spawn.appliances.maintenance;
+
+import eu.mhsl.craftattack.spawn.appliance.ApplianceCommand;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Map;
+
+public class MaintenanceCommand extends ApplianceCommand<Maintenance> {
+    public MaintenanceCommand() {
+        super("maintanance");
+    }
+
+    @Override
+    protected void execute(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) throws Exception {
+        Map<String, Boolean> options = Map.of("enable", true, "disable", false);
+        if(args.length != 1 || !options.containsKey(args[0])) throw new Error("Argument 'enable' oder 'disable' gefordert!");
+        getAppliance().setState(options.get(args[0]));
+        sender.sendMessage(String.format("Maintanance: %b", getAppliance().isInMaintenance()));
+    }
+}

src/main/java/eu/mhsl/craftattack/spawn/appliances/maintenance/PreventMaintenanceJoinListener.java

@@ -0,0 +1,23 @@
+package eu.mhsl.craftattack.spawn.appliances.maintenance;
+
+import eu.mhsl.craftattack.spawn.appliance.ApplianceListener;
+import eu.mhsl.craftattack.spawn.util.text.DisconnectInfo;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.player.PlayerLoginEvent;
+
+public class PreventMaintenanceJoinListener extends ApplianceListener<Maintenance> {
+    @EventHandler
+    public void onJoin(PlayerLoginEvent event) {
+        if(!getAppliance().isInMaintenance()) return;
+        if(event.getPlayer().hasPermission("bypassMaintainance")) return;
+
+        DisconnectInfo disconnectInfo = new DisconnectInfo(
+            "Wartunsarbeiten",
+            "Zurzeit können nur Admins dem Server beitreten!",
+            "Bitte warte bis die Warungsarbeiten wieder deaktiviert werden.",
+            event.getPlayer().getUniqueId()
+        );
+
+        event.disallow(PlayerLoginEvent.Result.KICK_OTHER, disconnectInfo.getComponent());
+    }
+}

src/main/resources/plugin.yml

@@ -38,3 +38,4 @@ commands:
   vogelfrei:
   settings:
   texturepack:
+  maintanance: