feat(game.mod): extension point utils

[skip ci]

src/main/java/org/auioc/mcmod/arnicalib/game/cpw/EnvironmentUtils.java → src/main/java/org/auioc/mcmod/arnicalib/game/mod/EnvironmentUtils.java

@@ -1,4 +1,4 @@
-package org.auioc.mcmod.arnicalib.game.cpw;
+package org.auioc.mcmod.arnicalib.game.mod;
 
 import java.util.Locale;
 import cpw.mods.modlauncher.Launcher;

src/main/java/org/auioc/mcmod/arnicalib/game/mod/ExtensionPointUtils.java

@@ -0,0 +1,20 @@
+package org.auioc.mcmod.arnicalib.game.mod;
+
+import net.minecraftforge.api.distmarker.Dist;
+import net.minecraftforge.api.distmarker.OnlyIn;
+import net.minecraftforge.fml.IExtensionPoint.DisplayTest;
+import net.minecraftforge.fml.ModLoadingContext;
+import net.minecraftforge.network.NetworkConstants;
+
+public class ExtensionPointUtils {
+
+    @OnlyIn(Dist.CLIENT)
+    public static void clientOnly() {
+        ModLoadingContext.get().registerExtensionPoint(DisplayTest.class, () -> new DisplayTest(() -> "ANY", (remote, isServer) -> isServer));
+    }
+
+    public static void serverOnly() {
+        ModLoadingContext.get().registerExtensionPoint(DisplayTest.class, () -> new DisplayTest(() -> NetworkConstants.IGNORESERVERONLY, (s, b) -> true));
+    }
+
+}