src/de/steamwar/lobby/LobbySystem.java

@@ -19,6 +19,7 @@
 
 package de.steamwar.lobby;
 
+import de.steamwar.lobby.commands.FlyCommand;
 import de.steamwar.lobby.listener.*;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.PluginManager;
@@ -33,7 +34,6 @@ public class LobbySystem extends JavaPlugin {
 		instance = this;
 
 		PluginManager pm = Bukkit.getPluginManager();
-
 		pm.registerEvents(new PlayerMoveListener(), instance);
 		pm.registerEvents(new PlayerConnectionListener(), instance);
 		pm.registerEvents(new PlayerInventoryListener(), instance);
@@ -41,6 +41,8 @@ public class LobbySystem extends JavaPlugin {
 		pm.registerEvents(new DoubleJumpListener(), instance);
 		pm.registerEvents(new ParticleListener(), instance);
 		pm.registerEvents(new EnderPearlListener(), instance);
+
+		getCommand("fly").setExecutor(new FlyCommand());
 	}
 
 	

src/de/steamwar/lobby/commands/FlyCommand.java

@@ -0,0 +1,55 @@
+/*
+    This file is a part of the SteamWar software.
+
+    Copyright (C) 2020  SteamWar.de-Serverteam
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+package de.steamwar.lobby.commands;
+
+import de.steamwar.lobby.utils.LobbyPlayer;
+import de.steamwar.sql.SteamwarUser;
+import de.steamwar.sql.UserGroup;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+public class FlyCommand implements CommandExecutor {
+
+    @Override
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        if (!(sender instanceof Player)) return false;
+
+        Player player = (Player) sender;
+        SteamwarUser steamwarUser = SteamwarUser.get(player.getUniqueId());
+        UserGroup userGroup = steamwarUser.getUserGroup();
+
+        if (userGroup == UserGroup.Member) {
+            player.sendMessage("§cUnbekannter Befehl.");
+            return false;
+        }
+
+        LobbyPlayer lobbyPlayer = LobbyPlayer.getLobbyPlayer(player);
+        boolean newFlightState = !lobbyPlayer.isFlying();
+
+        lobbyPlayer.setFly(newFlightState);
+        player.setAllowFlight(newFlightState);
+        player.setFlying(newFlightState);
+        player.sendMessage("§7Du kannst jetzt " + (newFlightState ? "§afliegen§7." : "§cnicht §7mehr fliegen."));
+        return false;
+    }
+
+}

src/de/steamwar/lobby/listener/DoubleJumpListener.java

@@ -19,6 +19,7 @@
 
 package de.steamwar.lobby.listener;
 
+import de.steamwar.lobby.utils.LobbyPlayer;
 import org.bukkit.GameMode;
 import org.bukkit.Material;
 import org.bukkit.Sound;
@@ -47,6 +48,9 @@ public class DoubleJumpListener implements Listener {
         if (player.getGameMode() != GameMode.ADVENTURE && player.getGameMode() != GameMode.SURVIVAL) {
             return;
         }
+        if (LobbyPlayer.getLobbyPlayer(player).isFlying()) {
+            return;
+        }
 
         event.setCancelled(true);
         player.setAllowFlight(false);
@@ -65,8 +69,8 @@ public class DoubleJumpListener implements Listener {
     public void handlePlayerMove(PlayerMoveEvent event) {
         Player player = event.getPlayer();
 
-        if(player.getLocation().add(0, -1, 0).getBlock().getType() == Material.AIR)
-            return;
+        if(player.getLocation().add(0, -1, 0).getBlock().getType() == Material.AIR) return;
+        if (LobbyPlayer.getLobbyPlayer(player).isFlying()) return;
 
         player.setAllowFlight(true);
         if (player.getGameMode() == GameMode.ADVENTURE || player.getGameMode() == GameMode.SURVIVAL) {

src/de/steamwar/lobby/utils/LobbyPlayer.java

@@ -20,6 +20,7 @@
 package de.steamwar.lobby.utils;
 
 import org.bukkit.Particle;
+import org.bukkit.entity.Player;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -37,11 +38,20 @@ public class LobbyPlayer {
     private double particle_time = 0.001;
 
     private boolean enderPearlUsed;
+    private boolean fly;
 
     private LobbyPlayer(UUID uuid) {
         cache.put(uuid, this);
     }
 
+    public boolean isFlying() {
+        return fly;
+    }
+
+    public void setFly(boolean fly) {
+        this.fly = fly;
+    }
+
     public Particle getParticle() {
         return particle;
     }
@@ -97,4 +107,8 @@ public class LobbyPlayer {
         LobbyPlayer lobbyPlayer = cache.get(uuid);
         return lobbyPlayer == null ? new LobbyPlayer(uuid) : lobbyPlayer;
     }
+
+    public static LobbyPlayer getLobbyPlayer(Player player) {
+        return getLobbyPlayer(player.getUniqueId());
+    }
 }

src/plugin.yml

@@ -5,3 +5,6 @@ depend:
   - SpigotCore
 main: de.steamwar.lobby.LobbySystem
 api-version: "1.13"
+
+commands:
+  fly: