Integrations: fix and add vault integration

src/main/java/net/flectone/Main.java

@@ -3,6 +3,7 @@
 import net.flectone.custom.FTabCompleter;
 import net.flectone.integrations.expansions.FExpansion;
 import net.flectone.integrations.luckperms.FLuckPerms;
+import net.flectone.integrations.vault.FVault;
 import net.flectone.integrations.voicechats.simplevoicechat.RegisterSimpleVoiceChat;
 import net.flectone.managers.FPlayerManager;
 import net.flectone.managers.FileManager;
@@ -25,8 +26,6 @@ public final class Main extends JavaPlugin {
 
     public static boolean isHavePlasmoVoice = false;
 
-    public static boolean isHaveVault = false;
-
     public static boolean isHaveInteractiveChat = false;
     public static FileManager config;
     public static FileManager locale;
@@ -103,7 +102,7 @@ private void loadIcons() {
 
     private void hookPlugins() {
         if (Bukkit.getPluginManager().getPlugin("Vault") != null) {
-            isHaveVault = true;
+            FVault.register();
             getLogger().info("\uD83D\uDD12 Vault detected and hooked");
         }
 

src/main/java/net/flectone/custom/FPlayer.java

@@ -1,6 +1,7 @@
 package net.flectone.custom;
 
 import net.flectone.Main;
+import net.flectone.integrations.vault.FVault;
 import net.flectone.managers.FPlayerManager;
 import net.flectone.utils.ObjectUtil;
 import net.milkbowl.vault.chat.Chat;
@@ -18,7 +19,6 @@
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
-import java.util.Objects;
 import java.util.stream.Collectors;
 
 public class FPlayer {
@@ -343,8 +343,8 @@ private String getStreamFormatPrefix() {
     }
 
     public void getVaultPrefixSuffix() {
-        if (Main.isHaveVault) {
-            Chat provider = Objects.requireNonNull(Main.getInstance().getServer().getServicesManager().getRegistration(Chat.class)).getProvider();
+        if (FVault.registered) {
+            Chat provider = FVault.getProvider();
 
             this.vaultPrefix = provider.getPlayerPrefix(player);
             this.vaultSuffix = provider.getPlayerSuffix(player);

src/main/java/net/flectone/integrations/vault/FVault.java

@@ -0,0 +1,30 @@
+package net.flectone.integrations.vault;
+
+import net.flectone.Main;
+import net.milkbowl.vault.chat.Chat;
+import org.bukkit.plugin.RegisteredServiceProvider;
+
+public class FVault {
+
+    public static boolean registered = false;
+
+    private static Chat provider;
+
+    public static void register() {
+        RegisteredServiceProvider<Chat> chatProvider = Main.getInstance().getServer().getServicesManager()
+                .getRegistration(net.milkbowl.vault.chat.Chat.class);
+
+        if (chatProvider == null) {
+            Main.warning("⚠ Failed to load Vault Chat, you may not have LuckPerms installed");
+            return;
+        }
+
+        provider = chatProvider.getProvider();
+        registered = true;
+    }
+
+    public static Chat getProvider() {
+        return provider;
+    }
+
+}