Fix skipping EaglerCraft players & error on join (#547)

* fix: fix skipping EaglerCraft players & error on join

* docs: improve eagler comment

Author: bobhenl

common/src/main/java/xyz/jonesdev/sonar/common/InboundHandlerAdapter.java

@@ -193,6 +193,7 @@ private static void rewriteProtocol(final @NotNull ChannelHandlerContext ctx,
         // Don't remove floodgate's pipelines
         || entry.getKey().startsWith("geyser")
         || entry.getKey().startsWith("floodgate")
+        || entry.getKey().startsWith("eagler")
         || entry.getKey().equals("DefaultChannelPipeline$TailContext#0")) {
         continue;
       }

common/src/main/java/xyz/jonesdev/sonar/common/util/EaglerUtil.java

@@ -24,12 +24,12 @@
 
 @UtilityClass
 public class EaglerUtil {
-  // https://github.com/lax1dude/eaglerxserver/blob/main/core/src/main/java/net/lax1dude/eaglercraft/backend/server/adapter/PipelineAttributes.java
-  public static final AttributeKey<Object> EAGLER_LISTENER_DATA = AttributeKey.valueOf("$eagler0");
-  public static final AttributeKey<Object> EAGLER_PIPELINE_DATA = AttributeKey.valueOf("$eagler1");
+  // Detect EaglerXServer WebSocket connections by checking for Eagler-specific pipeline handlers.
+  private static final String H_EAGLER_HANDSHAKE = "eagler-handshake";
+  private static final String H_EAGLER_FRAME_CODEC = "eagler-frame-codec";
 
   public boolean isEaglerConnection(final @NotNull Channel channel) {
-    return channel.attr(EAGLER_LISTENER_DATA).get() != null
-      || channel.attr(EAGLER_PIPELINE_DATA).get() != null;
+    return channel.pipeline().get(H_EAGLER_HANDSHAKE) != null
+      || channel.pipeline().get(H_EAGLER_FRAME_CODEC) != null;
   }
 }