New spectator mode

pom.xml

@@ -59,5 +59,12 @@
             <scope>system</scope>
             <systemPath>${main.basedir}/lib/WorldEdit-1.15.jar</systemPath>
         </dependency>
+        <dependency>
+            <groupId>steamwar</groupId>
+            <artifactId>ProtocolLib</artifactId>
+            <version>1.0</version>
+            <scope>system</scope>
+            <systemPath>${main.basedir}/lib/ProtocolLib.jar</systemPath>
+        </dependency>
     </dependencies>
 </project>

src/de/steamwar/spectatesystem/listener/JoinListener.java

@@ -19,23 +19,56 @@
 
 package de.steamwar.spectatesystem.listener;
 
+import com.comphenix.protocol.PacketType;
+import com.comphenix.protocol.ProtocolLibrary;
+import com.comphenix.protocol.events.PacketContainer;
+import com.comphenix.protocol.wrappers.EnumWrappers;
+import com.comphenix.protocol.wrappers.PlayerInfoData;
+import com.comphenix.protocol.wrappers.WrappedChatComponent;
+import com.comphenix.protocol.wrappers.WrappedGameProfile;
 import de.steamwar.scoreboard.SWScoreboard;
 import de.steamwar.spectatesystem.Config;
 import de.steamwar.spectatesystem.SpectateSystem;
 import de.steamwar.spectatesystem.elements.REntity;
+import org.bukkit.Bukkit;
 import org.bukkit.GameMode;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.player.PlayerJoinEvent;
 import org.bukkit.event.player.PlayerQuitEvent;
 
+import java.lang.reflect.InvocationTargetException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.logging.Level;
+
 public class JoinListener extends BasicListener {
 
     @EventHandler
     public void onJoin(PlayerJoinEvent e){
         Player player = e.getPlayer();
         REntity.playerJoins(player);
+
         player.setGameMode(GameMode.SPECTATOR);
+        for(Player currentPlayer : Bukkit.getServer().getOnlinePlayers()) {
+            if(currentPlayer.getUniqueId() != player.getUniqueId() && currentPlayer.getGameMode() == GameMode.SPECTATOR) {
+                currentPlayer.hidePlayer(SpectateSystem.get(), player);
+                player.hidePlayer(SpectateSystem.get(), currentPlayer);
+            }
+        }
+        Bukkit.getScheduler().runTaskLater(SpectateSystem.get(), () -> {
+            PacketContainer gm1packet = ProtocolLibrary.getProtocolManager().createPacket(PacketType.Play.Server.PLAYER_INFO);
+            gm1packet.getPlayerInfoAction().write(0, EnumWrappers.PlayerInfoAction.UPDATE_GAME_MODE);
+            List<PlayerInfoData> playerInfoActions = new ArrayList<>();
+            playerInfoActions.add(new PlayerInfoData(WrappedGameProfile.fromPlayer(player), 1, EnumWrappers.NativeGameMode.CREATIVE, WrappedChatComponent.fromText(player.getDisplayName())));
+            gm1packet.getPlayerInfoDataLists().write(0, playerInfoActions);
+            try {
+                ProtocolLibrary.getProtocolManager().sendServerPacket(player, gm1packet);
+            } catch (InvocationTargetException ex) {
+                Bukkit.getLogger().log(Level.SEVERE, "Invocation target exception", ex);
+            }
+        }, 2);
+
         player.getInventory().clear();
         player.teleport(Config.SpecSpawn);
         SWScoreboard.createScoreboard(player, SpectateSystem.getScoreboard());

src/plugin.yml

@@ -7,4 +7,5 @@ main: de.steamwar.spectatesystem.SpectateSystem
 load: POSTWORLD
 depends:
   - SpigotCore
-  - WorldEdit
+  - WorldEdit
+  - ProtocolLib