Rename to MessageEntropy

Author: HaHaWTH

…o/wdsj/asw/common/utils/ChatEntropy.java …dsj/asw/common/utils/MessageEntropy.javacommon/src/main/java/io/wdsj/asw/common/utils/ChatEntropy.java renamed to common/src/main/java/io/wdsj/asw/common/utils/MessageEntropy.java common/src/main/java/io/wdsj/asw/common/utils/ChatEntropy.java renamed to common/src/main/java/io/wdsj/asw/common/utils/MessageEntropy.java

@@ -4,8 +4,8 @@
 import java.util.HashMap;
 import java.util.Map;
 
-public final class ChatEntropy {
-    private ChatEntropy() {
+public final class MessageEntropy {
+    private MessageEntropy() {
     }
 
     public static int visibleCodePointCount(String message) {

paper/src/main/java/io/wdsj/asw/bukkit/ai/CompatibleLlmChatClient.java

@@ -11,7 +11,6 @@
 
 import java.time.Duration;
 
-/** Routes one moderation request through the configured OpenAI- or Anthropic-compatible protocol. */
 final class CompatibleLlmChatClient implements LlmChatClient {
     private final ChatModel model;
 

paper/src/main/java/io/wdsj/asw/bukkit/ai/LlmCategoryPolicy.java

@@ -4,7 +4,6 @@
 
 import java.util.List;
 
-/** Immutable notification and enforcement thresholds for one LLM moderation category. */
 public record LlmCategoryPolicy(
         double notifyConfidence,
         double punishConfidence,

paper/src/main/java/io/wdsj/asw/bukkit/ai/LlmChatDetectionService.java

@@ -9,6 +9,7 @@
 import io.wdsj.asw.bukkit.type.ModuleType;
 import io.wdsj.asw.bukkit.util.SchedulingUtils;
 import io.wdsj.asw.bukkit.util.ViolationReporter;
+import io.wdsj.asw.common.utils.MessageEntropy;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
@@ -32,7 +33,6 @@
 import java.nio.charset.StandardCharsets;
 import io.wdsj.asw.bukkit.setting.SettingsConfiguration;
 
-/** Coordinates asynchronous, single-message LLM moderation requests. */
 public final class LlmChatDetectionService implements Listener, AutoCloseable {
     private final PaperConfigurationService configuration;
     private final ViolationReporter violationReporter;
@@ -94,12 +94,12 @@ public void submit(UUID playerId, String playerName, String message) {
         if (rawCodePoints > settings.maximumMessageCodePoints()) {
             return;
         }
-        int visibleCodePoints = io.wdsj.asw.common.utils.ChatEntropy.visibleCodePointCount(message);
+        int visibleCodePoints = MessageEntropy.visibleCodePointCount(message);
         if (visibleCodePoints < settings.minimumMessageCodePoints()) {
             return;
         }
 
-        double entropy = io.wdsj.asw.common.utils.ChatEntropy.shannonEntropyBits(message);
+        double entropy = MessageEntropy.shannonEntropyBits(message);
         if (entropy < settings.minimumEntropyBits()) {
             return;
         }

paper/src/test/java/io/wdsj/asw/bukkit/ai/ChatEntropyTest.java

@@ -0,0 +1,23 @@
+package io.wdsj.asw.bukkit.ai;
+
+import io.wdsj.asw.common.utils.MessageEntropy;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class MessageEntropyTest {
+    @Test
+    void ignoresWhitespaceAndControlsForEntropy() {
+        assertEquals(3, MessageEntropy.visibleCodePointCount(" a\n b\t c "));
+        assertEquals(0.0D, MessageEntropy.shannonEntropyBits("aaaa"));
+        assertEquals(2.0D, MessageEntropy.shannonEntropyBits("abcd"), 0.000001D);
+    }
+
+    @Test
+    void normalizesFullWidthCharactersBeforeCounting() {
+        assertEquals(2, MessageEntropy.visibleCodePointCount("ＡA"));
+        assertEquals(0.0D, MessageEntropy.shannonEntropyBits("ＡA"));
+        assertTrue(MessageEntropy.shannonEntropyBits("abca") > 1.0D);
+    }
+}