feat: 1.20.5 support and some small improvements

Author: iGabyTM

src/main/java/at/helpch/placeholderapi/expansion/server/ServerExpansion.java

@@ -186,7 +186,7 @@ private int getOnlinePlayers(@NotNull final String worldName) {
                 return ServerUtil.getBuild();
             case "version_build":
             case "version_full":
-                return ServerUtil.getServerVersion() + '-' + ServerUtil.getBuild();
+                return Bukkit.getBukkitVersion();
             // -----
 
             // ----- RAM placeholders

src/main/java/at/helpch/placeholderapi/expansion/server/util/ServerUtil.java

@@ -11,7 +11,6 @@ public final class ServerUtil {
 
     private static final Map<String, String> variants = new TreeMap<>();
     private static final String variant;
-    private static final String serverVersion;
     private static final String build;
 
     // TPS stuff
@@ -29,7 +28,6 @@ public final class ServerUtil {
         craftServer = getCraftServer();
         tpsField = getTpsHandler();
         variant = findVariant();
-        serverVersion = Bukkit.getBukkitVersion().split("-")[0]; // The version is formatted as 1.20.1-R0.1-SNAPSHOT
         build = findBuild();
     }
 
@@ -65,7 +63,7 @@ private static Object getCraftServer() {
             if (VersionHelper.IS_1_17_OR_HIGHER) {
                 clas = Class.forName("net.minecraft.server.MinecraftServer");
             } else {
-                clas = Class.forName(String.format("net.minecraft.server.%s.MinecraftServer", VersionHelper.NMS_VERSION));
+                clas = Class.forName(String.format("net.minecraft.server.%s.MinecraftServer", VersionHelper.getNmsVersion()));
             }
 
             return clas.getMethod("getServer").invoke(null);
@@ -124,15 +122,15 @@ private static String findBuild() {
             }
         }
 
-        return "Unknonw";
+        return "Unknown";
     }
 
     public static String getVariant() {
         return variant;
     }
 
     public static String getServerVersion() {
-        return serverVersion;
+        return VersionHelper.MINECRAFT_VERSION;
     }
 
     public static String getBuild() {

src/main/java/at/helpch/placeholderapi/expansion/server/util/VersionHelper.java

@@ -25,10 +25,8 @@
 
 import com.google.common.primitives.Ints;
 import org.bukkit.Bukkit;
-import org.bukkit.OfflinePlayer;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -37,14 +35,15 @@
  */
 public final class VersionHelper {
 
-    public static final String NMS_VERSION = getNmsVersion();
+    private static final String CRAFTBUKKIT_PACKAGE = Bukkit.getServer().getClass().getPackage().getName();
 
     private static final int V1_17 = 1_17_0;
 
     private static final int CURRENT_VERSION = getCurrentVersion();
 
     private static final boolean IS_PAPER = checkPaper();
 
+    public static final String MINECRAFT_VERSION = getMinecraftVersion();
     public static final boolean IS_1_17_OR_HIGHER = CURRENT_VERSION >= V1_17;
 
     /**
@@ -73,7 +72,7 @@ private static boolean checkPaper() {
      */
     private static int getCurrentVersion() {
         // No need to cache since will only run once
-        final Matcher matcher = Pattern.compile("(?<version>\\d+\\.\\d+)(?<patch>\\.\\d+)?").matcher(Bukkit.getBukkitVersion());
+        final Matcher matcher = Pattern.compile("(?<version>\\d+\\.\\d+)(?<patch>\\.\\d+)?").matcher(MINECRAFT_VERSION);
 
         final StringBuilder stringBuilder = new StringBuilder();
         if (matcher.find()) {
@@ -92,13 +91,23 @@ private static int getCurrentVersion() {
         return version;
     }
 
-    private static String getNmsVersion() {
+    private static String getMinecraftVersion() {
+        try {
+            // Paper method from 2020 - returns the version like 1.20.1
+            return Bukkit.getMinecraftVersion();
+        } catch (NoSuchMethodError ignored) {
+            // The version is formatted as 1.20.1-R0.1-SNAPSHOT
+            return Bukkit.getBukkitVersion().split("-")[0];
+        }
+    }
+
+    public static String getNmsVersion() {
         final String version = Bukkit.getServer().getClass().getPackage().getName();
         return version.substring(version.lastIndexOf('.') + 1);
     }
 
     public static Class<?> craftClass(@NotNull final String name) throws ClassNotFoundException {
-        return Class.forName("org.bukkit.craftbukkit." + NMS_VERSION + "." + name);
+        return Class.forName(CRAFTBUKKIT_PACKAGE + "." + name);
     }
 
 }