Merge pull request #1754 from Cyramek/via-version-fix

warn about `ViaVersion rotation-place fix`

build.gradle.kts

@@ -51,7 +51,7 @@ dependencies {
     implementation("org.jetbrains:annotations:24.1.0")
     compileOnly("org.geysermc.floodgate:api:2.0-SNAPSHOT")
     compileOnly("org.spigotmc:spigot-api:1.18.2-R0.1-SNAPSHOT")
-    compileOnly("com.viaversion:viaversion-api:4.9.4-SNAPSHOT")
+    compileOnly("com.viaversion:viaversion-api:5.0.4-SNAPSHOT")
     //
     compileOnly("io.netty:netty-all:4.1.85.Final")
 }

src/main/java/ac/grim/grimac/manager/InitManager.java

@@ -38,6 +38,7 @@ public InitManager() {
                 .put(DiscordManager.class, GrimAPI.INSTANCE.getDiscordManager())
                 .put(SpectateManager.class, GrimAPI.INSTANCE.getSpectateManager())
                 .put(JavaVersion.class, new JavaVersion())
+                .put(ViaVersion.class, new ViaVersion())
                 .build();
 
         initializersOnStop = new ImmutableClassToInstanceMap.Builder<Initable>()

src/main/java/ac/grim/grimac/manager/init/start/ViaVersion.java

@@ -0,0 +1,19 @@
+package ac.grim.grimac.manager.init.start;
+
+import ac.grim.grimac.manager.init.Initable;
+import ac.grim.grimac.utils.anticheat.LogUtil;
+import com.viaversion.viaversion.api.Via;
+import io.github.retrooper.packetevents.util.viaversion.ViaVersionUtil;
+
+public class ViaVersion implements Initable {
+    @Override
+    public void start() {
+        if (!ViaVersionUtil.isAvailable() || !Via.getConfig().fix1_21PlacementRotation()) {
+            return;
+        }
+
+        LogUtil.warn("GrimAC has detected that you are using ViaVersion with the `fix-1_21-placement-rotation` option enabled.");
+        LogUtil.warn("This option is known to cause issues with GrimAC and may result in false positives and bypasses.");
+        LogUtil.warn("Please disable this option in your ViaVersion configuration to prevent these issues.");
+    }
+}