Add method to get server TPS

BukkitUtils/pom.xml

@@ -10,8 +10,13 @@
     <modelVersion>4.0.0</modelVersion>
 
     <artifactId>bukkitutils</artifactId>
+    <version>1.1-SNAPSHOT</version>
 
     <repositories>
+        <repository>
+            <id>destroystokyo-repo</id>
+            <url>https://repo.destroystokyo.com/repository/maven-public//</url>
+        </repository>
         <repository>
             <id>spigot-repo</id>
             <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
@@ -24,6 +29,12 @@
             <artifactId>reflect</artifactId>
             <version>1.0-SNAPSHOT</version>
         </dependency>
+        <dependency>
+            <groupId>com.destroystokyo.paper</groupId>
+            <artifactId>paper-api</artifactId>
+            <version>1.10.2-R0.1-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
         <dependency>
             <groupId>org.bukkit</groupId>
             <artifactId>bukkit</artifactId>

BukkitUtils/src/main/java/eu/mikroskeem/utils/bukkit/ServerUtils.java

@@ -0,0 +1,38 @@
+package eu.mikroskeem.utils.bukkit;
+
+import eu.mikroskeem.utils.reflect.Reflect;
+import org.bukkit.Bukkit;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+
+public class ServerUtils {
+    /**
+     * Get server's TPS
+     *
+     * Will use PaperSpigot's API if available, reflection otherwise
+     * @return double array of TPS (not rounded!), values are -1 if reflection failed
+     */
+    public static double[] getTPS(){
+        if(Bukkit.getVersion().contains("Paper")) {
+            return Bukkit.getTPS();
+        } else {
+            String bukkitPackageName = Bukkit.getServer().getClass().getPackage().getName();
+            String nmsVer = bukkitPackageName.substring(bukkitPackageName.lastIndexOf(".") + 1);
+
+            Class<?> MinecraftServerClass = Reflect.getClass(
+                    String.format("net.minecraft.server.%s.MinecraftServer", nmsVer));
+            if(MinecraftServerClass != null){
+                Method getServer = Reflect.getMethod(MinecraftServerClass, "getServer");
+                Field recentTPS = Reflect.getField(MinecraftServerClass, "recentTps");
+                if(getServer != null && recentTPS != null){
+                    Object server = Reflect.invokeMethod(getServer, null);
+                    try {
+                        return (double[]) Reflect.readField(recentTPS, server);
+                    } catch (NullPointerException e){}
+                }
+            }
+        }
+        return new double[]{-1, -1, -1};
+    }
+}