Added platform fork to metrics. Improved MC version detector in Bungee

bungee/src/main/java/org/geysermc/floodgate/inject/bungee/BungeeInjector.java

@@ -59,7 +59,7 @@ public final class BungeeInjector extends CommonPlatformInjector {
             // (Instead of just replacing the ChannelInitializer which is only called for
             // player <-> proxy)
             BungeeCustomPrepender customPrepender = new BungeeCustomPrepender(
-                    this, ReflectionUtils.getCastedValue(null, framePrepender)
+                    this, ReflectionUtils.castedStaticValue(framePrepender)
             );
 
             BungeeReflectionUtils.setFieldValue(null, framePrepender, customPrepender);

bungee/src/main/java/org/geysermc/floodgate/util/BungeePlatformUtils.java

@@ -25,14 +25,40 @@
 
 package org.geysermc.floodgate.util;
 
+import java.lang.reflect.Field;
 import java.util.List;
 import net.md_5.bungee.api.ProxyServer;
 import net.md_5.bungee.protocol.ProtocolConstants;
 import org.geysermc.floodgate.platform.util.PlatformUtils;
 
+@SuppressWarnings("ConstantConditions")
 public final class BungeePlatformUtils extends PlatformUtils {
+    private static final String LATEST_SUPPORTED_VERSION;
     private final ProxyServer proxyServer = ProxyServer.getInstance();
 
+    static {
+        int protocolNumber = -1;
+        String versionName = "";
+
+        for (Field field : ProtocolConstants.class.getFields()) {
+            if (!field.getName().startsWith("MINECRAFT_")) {
+                continue;
+            }
+
+            int fieldValue = ReflectionUtils.castedStaticValue(field);
+            if (fieldValue > protocolNumber) {
+                protocolNumber = fieldValue;
+                versionName = field.getName().substring(10).replace('_', '.');
+            }
+        }
+
+        if (protocolNumber == -1) {
+            List<String> versions = ProtocolConstants.SUPPORTED_VERSIONS;
+            versionName = versions.get(versions.size() - 1);
+        }
+        LATEST_SUPPORTED_VERSION = versionName;
+    }
+
     @Override
     public AuthType authType() {
         return proxyServer.getConfig().isOnlineMode() ? AuthType.ONLINE : AuthType.OFFLINE;
@@ -40,7 +66,11 @@ public final class BungeePlatformUtils extends PlatformUtils {
 
     @Override
     public String minecraftVersion() {
-        List<String> versions = ProtocolConstants.SUPPORTED_VERSIONS;
-        return versions.get(versions.size() - 1);
+        return LATEST_SUPPORTED_VERSION;
+    }
+
+    @Override
+    public String serverImplementationName() {
+        return proxyServer.getName();
     }
 }

core/src/main/java/org/geysermc/floodgate/platform/util/PlatformUtils.java

@@ -40,6 +40,8 @@ public abstract class PlatformUtils {
      */
     public abstract String minecraftVersion();
 
+    public abstract String serverImplementationName();
+
     public enum AuthType {
         ONLINE,
         PROXIED,

core/src/main/java/org/geysermc/floodgate/util/Metrics.java

@@ -96,7 +96,11 @@ public final class Metrics {
                 new SimplePie("floodgate_version", () -> Constants.VERSION)
         );
 
-        metricsBase.addCustomChart(new SimplePie("platform", () -> implementationName));
+        metricsBase.addCustomChart(
+                new DrilldownPie("platform", () -> Collections.singletonMap(
+                        implementationName,
+                        Collections.singletonMap(platformUtils.serverImplementationName(), 1)
+                )));
 
         metricsBase.addCustomChart(
                 new DrilldownPie("minecraft_version", () -> {

core/src/main/java/org/geysermc/floodgate/util/ReflectionUtils.java

@@ -269,6 +269,11 @@ public final class ReflectionUtils {
         return (T) getValue(instance, getField(instance.getClass(), fieldName));
     }
 
+    @Nullable
+    public static <T> T castedStaticValue(Field field) {
+        return getCastedValue(null, field);
+    }
+
     /**
      * Set the value of a field. This method make the field accessible and then sets the value.<br>
      * This method doesn't throw an exception when failed, but it'll log the error to the console.

spigot/src/main/java/org/geysermc/floodgate/util/ProxyUtils.java

@@ -33,7 +33,7 @@ public final class ProxyUtils {
     }
 
     private static boolean isBungeeData() {
-        return ReflectionUtils.getCastedValue(null, ClassNames.BUNGEE);
+        return ReflectionUtils.castedStaticValue(ClassNames.BUNGEE);
     }
 
     private static boolean isVelocitySupport() {
@@ -41,6 +41,6 @@ public final class ProxyUtils {
             return false;
         }
 
-        return ReflectionUtils.getCastedValue(null, ClassNames.PAPER_VELOCITY_SUPPORT);
+        return ReflectionUtils.castedStaticValue(ClassNames.PAPER_VELOCITY_SUPPORT);
     }
 }

spigot/src/main/java/org/geysermc/floodgate/util/SpigotPlatformUtils.java

@@ -41,4 +41,9 @@ public class SpigotPlatformUtils extends PlatformUtils {
     public String minecraftVersion() {
         return Bukkit.getServer().getVersion().split("\\(MC: ")[1].split("\\)")[0];
     }
+
+    @Override
+    public String serverImplementationName() {
+        return Bukkit.getServer().getName();
+    }
 }

velocity/src/main/java/org/geysermc/floodgate/util/VelocityPlatformUtils.java

@@ -43,4 +43,9 @@ public final class VelocityPlatformUtils extends PlatformUtils {
     public String minecraftVersion() {
         return ProtocolVersion.MAXIMUM_VERSION.getMostRecentSupportedVersion();
     }
+
+    @Override
+    public String serverImplementationName() {
+        return server.getVersion().getName();
+    }
 }