Add Types#CUSTOM_CLICK_ACTION_TAG for VB (ViaVersion#4557)

* Add LengthPrefixedTagType for CUSTOM_CLICK_ACTION

* Move type into own class, add instance into Types

---------

Co-authored-by: FlorianMichael <[email protected]>

Author: riku6460

api/src/main/java/com/viaversion/viaversion/api/type/Types.java

@@ -108,6 +108,7 @@
 import com.viaversion.viaversion.api.type.types.misc.HolderSetType;
 import com.viaversion.viaversion.api.type.types.misc.HolderType;
 import com.viaversion.viaversion.api.type.types.misc.KeyType;
+import com.viaversion.viaversion.api.type.types.misc.LengthPrefixedTagType;
 import com.viaversion.viaversion.api.type.types.misc.NamedCompoundTagType;
 import com.viaversion.viaversion.api.type.types.misc.PlayerMessageSignatureType;
 import com.viaversion.viaversion.api.type.types.misc.ProfileKeyType;
@@ -199,6 +200,7 @@ public final class Types {
     public static final Type<Tag> TAG = new TagType();
     public static final Type<Tag[]> TAG_ARRAY = new ArrayType<>(TAG);
     public static final Type<Tag> OPTIONAL_TAG = new TagType.OptionalTagType();
+    public static final Type<Tag> CUSTOM_CLICK_ACTION_TAG = new LengthPrefixedTagType(65536);
 
     public static final Type<GlobalBlockPosition> GLOBAL_POSITION = new GlobalBlockPositionType();
     public static final Type<GlobalBlockPosition> OPTIONAL_GLOBAL_POSITION = new GlobalBlockPositionType.OptionalGlobalPositionType();

api/src/main/java/com/viaversion/viaversion/api/type/types/misc/LengthPrefixedTagType.java

@@ -0,0 +1,73 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2025 ViaVersion and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.viaversion.viaversion.api.type.types.misc;
+
+import com.google.common.base.Preconditions;
+import com.viaversion.nbt.tag.Tag;
+import com.viaversion.viaversion.api.type.Type;
+import com.viaversion.viaversion.api.type.Types;
+import io.netty.buffer.ByteBuf;
+
+public final class LengthPrefixedTagType extends Type<Tag> {
+
+    private final int maxLength;
+
+    public LengthPrefixedTagType(int maxLength) {
+        super(Tag.class);
+        this.maxLength = maxLength;
+    }
+
+    @Override
+    public Tag read(final ByteBuf buffer) {
+        final int length = Types.VAR_INT.readPrimitive(buffer);
+        if (length <= 0) {
+            return null;
+        }
+
+        Preconditions.checkArgument(length <= maxLength,
+            "Cannot receive tag longer than %s bytes (got %s bytes)", maxLength, length);
+
+        return Types.TAG.read(buffer.readSlice(length));
+    }
+
+    @Override
+    public void write(final ByteBuf buffer, final Tag tag) {
+        if (tag == null) {
+            Types.VAR_INT.writePrimitive(buffer, 0);
+            return;
+        }
+
+        final ByteBuf tempBuf = buffer.alloc().buffer();
+        try {
+            Types.TAG.write(tempBuf, tag);
+
+            Preconditions.checkArgument(tempBuf.readableBytes() <= maxLength,
+                "Cannot send tag longer than %s bytes (got %s bytes)", maxLength, tempBuf.readableBytes());
+
+            Types.VAR_INT.writePrimitive(buffer, tempBuf.readableBytes());
+            buffer.writeBytes(tempBuf);
+        } finally {
+            tempBuf.release();
+        }
+    }
+}