fix Pattern for prefix

Author: HSGamer

core/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>topper</artifactId>
         <groupId>me.hsgamer</groupId>
-        <version>1.2.4</version>
+        <version>1.2.5</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

pom.xml

@@ -7,7 +7,7 @@
     <groupId>me.hsgamer</groupId>
     <artifactId>topper</artifactId>
     <packaging>pom</packaging>
-    <version>1.2.4</version>
+    <version>1.2.5</version>
     <modules>
         <module>core</module>
         <module>spigot</module>

spigot/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>topper</artifactId>
         <groupId>me.hsgamer</groupId>
-        <version>1.2.4</version>
+        <version>1.2.5</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

spigot/src/main/java/me/hsgamer/topper/spigot/holder/PlaceholderTopHolder.java

@@ -6,7 +6,6 @@
 import me.hsgamer.topper.spigot.config.MainConfig;
 import org.bukkit.OfflinePlayer;
 
-import java.util.Locale;
 import java.util.Optional;
 import java.util.UUID;
 import java.util.concurrent.CompletableFuture;
@@ -23,8 +22,8 @@ public PlaceholderTopHolder(TopperPlugin instance, TopStorage topStorage, String
         super(instance, topStorage, name);
         Matcher matcher = PATTERN.matcher(placeholder);
         if (matcher.matches()) {
-            this.placeholder = matcher.group(2);
-            String prefix = matcher.group(1).toLowerCase(Locale.ROOT);
+            this.placeholder = Optional.ofNullable(matcher.group(2)).orElse("");
+            String prefix = Optional.ofNullable(matcher.group(1)).map(String::toLowerCase).orElse("");
             isOnlineOnly = prefix.contains("[online]");
             isAsync = prefix.contains("[async]");
         } else {