proper disconnectInfo screen and preventing dead users from joining

src/main/java/eu/mhsl/craftattack/teamLobby/Lobby.java

@@ -108,13 +108,13 @@ public class Lobby extends InstanceContainer {
                 .collect(Collectors.toSet())
                 .containsAll(livingPlayers);
 
-            if(this.isComplete) {
+            if(this.isComplete && !wasComplete) {
                 this.playSound(Sound.sound(SoundEvent.ENTITY_EXPERIENCE_ORB_PICKUP, Sound.Source.PLAYER, 1f, 1f));
                 this.everyMember(p -> p.sendMessage(Component.text(
                     "Das Team ist vollständig. Der Server kann jederzeit über den Knopf betreten werden!",
                     NamedTextColor.GREEN
                 )));
-            } else if(wasComplete) {
+            } else if(!this.isComplete && wasComplete) {
                 this.playSound(Sound.sound(SoundEvent.ENTITY_EXPERIENCE_ORB_PICKUP, Sound.Source.PLAYER, 1f, 0.1f));
                 this.everyMember(p -> p.sendMessage(Component.text(
                     "Das Team ist nicht mehr vollständig.",
@@ -152,17 +152,6 @@ public class Lobby extends InstanceContainer {
         this.playSound(Sound.sound(SoundEvent.ENTITY_PLAYER_LEVELUP, Sound.Source.PLAYER, 1f, 1f));
 
         MinecraftServer.getSchedulerManager().scheduleTask(() -> this.everyMember(p -> {
-            var isDead = this.team.users().stream()
-                .filter(user -> user.uuid().equals(p.getUuid()))
-                .findAny()
-                .orElseThrow()
-                .dead();
-
-            if(isDead) {
-                p.sendActionBar(Component.text("Du bist bereits aus dem Projekt ausgeschieden!", NamedTextColor.RED));
-                return;
-            }
-
             p.addEffect(new Potion(PotionEffect.DARKNESS, 0, 5 * Ticks.TICKS_PER_SECOND));
             p.sendActionBar(Component.text("Verbinde...", NamedTextColor.GREEN));
             PluginMessageUtil.connect(p, this.targetServer);

src/main/java/eu/mhsl/craftattack/teamLobby/LobbyManager.java

@@ -15,11 +15,12 @@ public class LobbyManager {
     public LobbyManager() {
         MinecraftServer.getSchedulerManager().scheduleTask(
             this::loadTeams,
-            TaskSchedule.seconds(3),
+            TaskSchedule.immediate(),
             TaskSchedule.minutes(1)
         );
     }
 
+    private final Object teamLock = new Object();
     private Set<Team> teams = Set.of();
     private final Map<Team, Lobby> instances = new HashMap<>();
 
@@ -28,19 +29,31 @@ public class LobbyManager {
             .GET()
             .build();
 
-        this.teams = Request.execute(request, new TypeToken<Set<Team>>(){}.getType()).cast();
+        synchronized(this.teamLock) {
+            this.teams = Request.execute(request, new TypeToken<Set<Team>>(){}.getType()).cast();
+        }
     }
 
-    public synchronized @NotNull Lobby getPlayerInstance(Player player) {
+    public @NotNull Lobby getPlayerInstance(Player player) {
         UUID playerId = player.getUuid();
-        Team targetTeam = this.teams.stream()
-            .filter(team -> team.users().stream().anyMatch(user -> user.uuid().equals(playerId)))
-            .findAny()
-            .orElseThrow(() -> new NoSuchElementException("Dein Account konnte nicht zugeordnet werden. Falls dies ein Fehler ist kontaktiere bitte einen Admin."));
 
-        if(!this.instances.containsKey(targetTeam)) {
+        Team targetTeam;
-            Lobby instance = new Lobby(targetTeam);
+        synchronized(this.teamLock) {
-            this.instances.put(targetTeam, instance);
+             targetTeam = this.teams.stream()
+                .filter(team -> team.users()
+                    .stream()
+                    .anyMatch(user -> !user.dead() && user.uuid().equals(playerId)))
+                .reduce((a, b) -> {
+                    throw new IllegalStateException("Zu deinem Account wurde mehr als ein Team gefunden. Bitte melde dies bei einem Admin!");
+                })
+                .orElseThrow(() -> new NoSuchElementException("Zu deinem Account wurde kein zugehöriges Team gefunden, da du entweder nicht angemeldet oder bereits ausgeschieden bist!"));
+        }
+
+        synchronized(this.instances) {
+            if(!this.instances.containsKey(targetTeam)) {
+                Lobby instance = new Lobby(targetTeam);
+                this.instances.put(targetTeam, instance);
+            }
         }
 
         return this.instances.get(targetTeam);

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

@@ -1,5 +1,6 @@
 package eu.mhsl.craftattack.teamLobby;
 
+import eu.mhsl.craftattack.teamLobby.util.DisconnectInfo;
 import net.minestom.server.MinecraftServer;
 import net.minestom.server.entity.Player;
 import net.minestom.server.event.player.AsyncPlayerConfigurationEvent;
@@ -14,7 +15,6 @@ import java.io.InputStream;
 import java.net.InetSocketAddress;
 import java.nio.file.Files;
 import java.nio.file.StandardCopyOption;
-import java.util.Arrays;
 
 public class Main {
     private static ConfigurationNode config;
@@ -66,8 +66,12 @@ public class Main {
                     event.setSpawningInstance(lobby);
                     p.setRespawnPoint(lobby.spawnPoint);
                 } catch(Exception e) {
-                    event.getPlayer().kick(String.format("Login: %s", e.getMessage()));
+                    new DisconnectInfo(
-                    System.err.println(Arrays.toString(e.getStackTrace()));
+                        "Login abgelehnt",
+                        e.getMessage(),
+                        "Wenn das ein Fehler ist, melde dich bitte bei einem Admin!",
+                        event.getPlayer().getUuid()
+                    ).applyKick(event.getPlayer());
                 }
             }
         );

src/main/java/eu/mhsl/craftattack/teamLobby/util/DisconnectInfo.java

@@ -0,0 +1,42 @@
+package eu.mhsl.craftattack.teamLobby.util;
+
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.minestom.server.entity.Player;
+
+import java.util.UUID;
+
+public record DisconnectInfo(String error, String description, String help, UUID user) {
+    public void applyKick(Player player) {
+        player.kick(this.getComponent());
+    }
+
+    public Component getComponent() {
+        return Component.text()
+            .appendNewline().appendNewline()
+            .append(Component.text(this.error, NamedTextColor.DARK_RED)).appendNewline()
+            .append(Component.text(this.description, NamedTextColor.RED)).appendNewline().appendNewline()
+            .append(Component.text(this.help, NamedTextColor.GRAY)).appendNewline().appendNewline()
+            .append(Component.text(this.user.toString(), NamedTextColor.DARK_GRAY)).appendNewline()
+            .build();
+    }
+
+    public static class Throwable extends Exception {
+        public String error;
+        public String description;
+        public String help;
+        public UUID user;
+
+        public Throwable(String error, String description, String help, UUID user) {
+            super(description);
+            this.error = error;
+            this.description = description;
+            this.help = help;
+            this.user = user;
+        }
+
+        public DisconnectInfo getDisconnectScreen() {
+            return new DisconnectInfo(this.error, this.description, this.help, this.user);
+        }
+    }
+}