fix crash if luckperms not loaded

Author: fooooooooooooooo

gradle.properties

@@ -1,5 +1,5 @@
 # plugin
-version              = 1.9.0-pre
+version              = 1.9.0-pre.1
 
 # dependencies
 velocity_version     = 3.3.0-SNAPSHOT

src/main/java/ooo/foooooooooooo/velocitydiscord/LuckPerms.java

@@ -0,0 +1,16 @@
+package ooo.foooooooooooo.velocitydiscord;
+
+import net.luckperms.api.LuckPermsProvider;
+import net.luckperms.api.model.user.UserManager;
+
+public class LuckPerms {
+  private final net.luckperms.api.LuckPerms luckPerms;
+
+  public LuckPerms() {
+    this.luckPerms = LuckPermsProvider.get();
+  }
+
+  public UserManager getUserManager() {
+    return this.luckPerms.getUserManager();
+  }
+}

src/main/java/ooo/foooooooooooo/velocitydiscord/VelocityDiscord.java

@@ -10,8 +10,6 @@
 import com.velocitypowered.api.proxy.ProxyServer;
 import com.velocitypowered.api.proxy.messages.MinecraftChannelIdentifier;
 import com.velocitypowered.api.scheduler.ScheduledTask;
-import net.luckperms.api.LuckPerms;
-import net.luckperms.api.LuckPermsProvider;
 import ooo.foooooooooooo.velocitydiscord.commands.Commands;
 import ooo.foooooooooooo.velocitydiscord.config.Config;
 import ooo.foooooooooooo.velocitydiscord.discord.Discord;
@@ -37,7 +35,7 @@
 public class VelocityDiscord {
   public static final String PluginName = "Velocity Discord Bridge";
   public static final String PluginDescription = "Velocity Discord Chat Bridge";
-  public static final String PluginVersion = "1.9.0-pre";
+  public static final String PluginVersion = "1.9.0-pre.1";
   public static final String PluginUrl = "https://github.com/fooooooooooooooo/VelocityDiscord";
 
   public static final String YeplibId = "yeplib";
@@ -130,8 +128,12 @@ public void onProxyInitialization(ProxyInitializeEvent event) {
     Commands.RegisterCommands(server.getCommandManager());
 
     try {
-      luckPerms = LuckPermsProvider.get();
-      logger.info("LuckPerms found, prefix will be displayed");
+      if (server.getPluginManager().getPlugin("luckperms").isPresent()) {
+        this.luckPerms = new LuckPerms();
+        logger.info("LuckPerms found, prefix will be displayed");
+      } else {
+        logger.info("LuckPerms not found, prefix will not be displayed");
+      }
     } catch (Exception e) {
       logger.info("LuckPerms not found, prefix will not be displayed");
     }

src/main/java/ooo/foooooooooooo/velocitydiscord/VelocityListener.java

@@ -135,10 +135,14 @@ private void updatePlayerCount() {
   }
 
   private Optional<String> getPrefix(UUID uuid) {
-    var user = VelocityDiscord.getLuckPerms().getUserManager().getUser(uuid);
+    var luckPerms = VelocityDiscord.getLuckPerms();
+    if (luckPerms == null) return Optional.empty();
+
+    var user = luckPerms.getUserManager().getUser(uuid);
     if (user != null) {
       return Optional.ofNullable(user.getCachedData().getMetaData().getPrefix());
     }
+
     return Optional.empty();
   }
 
@@ -150,8 +154,8 @@ public void checkServerHealth() {
 
     CompletableFuture
       .allOf(servers.parallelStream()
-               .map((server) -> server.ping().handle((ping, ex) -> handlePing(server, ping, ex)))
-               .toArray(CompletableFuture[]::new))
+        .map((server) -> server.ping().handle((ping, ex) -> handlePing(server, ping, ex)))
+        .toArray(CompletableFuture[]::new))
       .join();
 
     this.firstHealthCheck = false;