Support conversion of mixed json array components

proxy/src/main/java/com/velocitypowered/proxy/protocol/packet/chat/ComponentHolder.java

@@ -28,6 +28,7 @@ import io.netty.buffer.ByteBuf;
 import net.kyori.adventure.nbt.BinaryTag;
 import net.kyori.adventure.nbt.BinaryTagIO;
 import net.kyori.adventure.nbt.BinaryTagType;
+import net.kyori.adventure.nbt.BinaryTagTypes;
 import net.kyori.adventure.nbt.ByteArrayBinaryTag;
 import net.kyori.adventure.nbt.ByteBinaryTag;
 import net.kyori.adventure.nbt.CompoundBinaryTag;
@@ -153,8 +154,19 @@ public class ComponentHolder {
         return ListBinaryTag.empty();
       }
 
-      BinaryTag listTag;
-      BinaryTagType<? extends BinaryTag> listType = serialize(jsonArray.get(0)).type();
+      List<BinaryTag> tagItems = new ArrayList<>(jsonArray.size());
+      BinaryTagType<? extends BinaryTag> listType = null;
+
+      for (JsonElement jsonEl : jsonArray) {
+        BinaryTag tag = serialize(jsonEl);
+        tagItems.add(tag);
+
+        if (listType == null) {
+          listType = tag.type();
+        } else if (listType != tag.type()) {
+          listType = BinaryTagTypes.COMPOUND;
+        }
+      }
 
       switch (listType.id()) {
         case 1://BinaryTagTypes.BYTE:
@@ -163,42 +175,33 @@ public class ComponentHolder {
             bytes[i] = (Byte) jsonArray.get(i).getAsNumber();
           }
 
-          listTag = ByteArrayBinaryTag.byteArrayBinaryTag(bytes);
-          break;
+          return ByteArrayBinaryTag.byteArrayBinaryTag(bytes);
         case 3://BinaryTagTypes.INT:
           int[] ints = new int[jsonArray.size()];
           for (int i = 0; i < ints.length; i++) {
             ints[i] = (Integer) jsonArray.get(i).getAsNumber();
           }
 
-          listTag = IntArrayBinaryTag.intArrayBinaryTag(ints);
-          break;
+          return IntArrayBinaryTag.intArrayBinaryTag(ints);
         case 4://BinaryTagTypes.LONG:
           long[] longs = new long[jsonArray.size()];
           for (int i = 0; i < longs.length; i++) {
             longs[i] = (Long) jsonArray.get(i).getAsNumber();
           }
 
-          listTag = LongArrayBinaryTag.longArrayBinaryTag(longs);
-          break;
-        default:
-          List<BinaryTag> tagItems = new ArrayList<>(jsonArray.size());
-
-          for (JsonElement jsonEl : jsonArray) {
-            BinaryTag subTag = serialize(jsonEl);
-
-            if (subTag.type() != listType) {
-              throw new IllegalArgumentException("Cannot convert mixed JsonArray to Tag");
+          return LongArrayBinaryTag.longArrayBinaryTag(longs);
+        case 10://BinaryTagTypes.COMPOUND:
+          tagItems.replaceAll(tag -> {
+            if (tag.type() == BinaryTagTypes.COMPOUND) {
+              return tag;
+            } else {
+              return CompoundBinaryTag.builder().put("", tag).build();
             }
-
-            tagItems.add(subTag);
-          }
-
-          listTag = ListBinaryTag.listBinaryTag(listType, tagItems);
+          });
           break;
       }
 
-      return listTag;
+      return ListBinaryTag.listBinaryTag(listType, tagItems);
     }
 
     return EndBinaryTag.endBinaryTag();

proxy/src/test/java/com/velocitypowered/proxy/component/ComponentHolderTest.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2021-2023 Velocity Contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.velocitypowered.proxy.component;
+
+import com.velocitypowered.api.network.ProtocolVersion;
+import com.velocitypowered.proxy.protocol.packet.chat.ComponentHolder;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import org.junit.jupiter.api.Test;
+
+/**
+ * ComponentHolder tests.
+ */
+public class ComponentHolderTest {
+
+  @Test
+  void testJsonToBinary() {
+    Component component = MiniMessage.miniMessage().deserialize(
+        "<#09add3>A <reset><reset>Velocity <#09add3>Server");
+    ComponentHolder holder = new ComponentHolder(ProtocolVersion.MINECRAFT_1_20_3, component);
+    holder.getJson();
+    holder.getBinaryTag();
+  }
+}