Fix legacy hover conversion

Fixes ViaVersion/ViaVersion#2471

build.gradle.kts

@@ -8,7 +8,7 @@ plugins {
 
 allprojects {
     group = "com.viaversion"
-    version = "4.0.0-21w19a"
+    version = "4.0.0-21w19a-SNAPSHOT"
     description = "Allow older clients to join newer server versions."
 }
 

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_15_2to1_16/chat/TagSerializer.java

@@ -32,6 +32,7 @@ import java.util.regex.Pattern;
 /**
  * Utility class to serialize a JsonObject with Minecraft's CompoundTag serialization
  */
+@Deprecated
 public class TagSerializer {
 
     private static final Pattern PLAIN_TEXT = Pattern.compile("[A-Za-z0-9._+-]+");

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_15_2to1_16/chat/TranslatableRewriter1_16.java

@@ -22,6 +22,8 @@ import com.viaversion.viabackwards.api.rewriters.TranslatableRewriter;
 import com.viaversion.viaversion.libs.gson.JsonElement;
 import com.viaversion.viaversion.libs.gson.JsonObject;
 import com.viaversion.viaversion.libs.gson.JsonPrimitive;
+import com.viaversion.viaversion.libs.kyori.adventure.text.Component;
+import com.viaversion.viaversion.protocols.protocol1_13to1_12_2.ChatRewriter;
 
 public class TranslatableRewriter1_16 extends TranslatableRewriter {
 
@@ -48,6 +50,7 @@ public class TranslatableRewriter1_16 extends TranslatableRewriter {
         super(protocol);
     }
 
+    @Override
     public void processText(JsonElement value) {
         super.processText(value);
         if (!value.isJsonObject()) return;
@@ -63,41 +66,18 @@ public class TranslatableRewriter1_16 extends TranslatableRewriter {
                 object.addProperty("color", closestChatColor);
             }
         }
-    }
-
-    @Override
-    protected void handleHoverEvent(JsonObject hoverEvent) {
-        // Don't call super, convert and process contents here
-        JsonElement contentsElement = hoverEvent.remove("contents");
-        if (contentsElement == null) return;
 
+        JsonObject hoverEvent = object.getAsJsonObject("hoverEvent");
+        if (hoverEvent != null) {
             // show_text as chat component
             // show_entity and show_item serialized as nbt
-        String action = hoverEvent.getAsJsonPrimitive("action").getAsString();
-        switch (action) {
-            case "show_text":
-                processText(contentsElement);
-                hoverEvent.add("value", contentsElement);
-                break;
-            case "show_item":
-                JsonObject item = contentsElement.getAsJsonObject();
-                JsonElement count = item.remove("count");
-                item.addProperty("Count", count != null ? count.getAsByte() : 1);
+            // Let adventure handle all of that
+            Component component = ChatRewriter.HOVER_GSON_SERIALIZER.deserializeFromTree(object);
+            JsonObject processedHoverEvent = ((JsonObject) ChatRewriter.HOVER_GSON_SERIALIZER.serializeToTree(component)).getAsJsonObject("hoverEvent");
 
-                hoverEvent.addProperty("value", TagSerializer.toString(item));
-                break;
-            case "show_entity":
-                JsonObject entity = contentsElement.getAsJsonObject();
-                JsonObject name = entity.getAsJsonObject("name");
-                if (name != null) {
-                    processText(name);
-                    entity.addProperty("name", name.toString());
-                }
-
-                JsonObject hoverObject = new JsonObject();
-                hoverObject.addProperty("text", TagSerializer.toString(entity));
-                hoverEvent.add("value", hoverObject);
-                break;
+            // Remove new format
+            processedHoverEvent.remove("contents");
+            object.add("hoverEvent", processedHoverEvent);
         }
     }
 

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ metadata.format.version = "1.0"
 [versions]
 
 # ViaVersion
-viaver = "4.0.0-21w19a"
+viaver = "4.0.0-21w19a-SNAPSHOT"
 
 # Common provided
 netty = "4.0.20.Final"