ContextMenuItem.java

package com.hypixel.hytale.protocol.packets.worldmap;

import com.hypixel.hytale.protocol.io.PacketIO;
import com.hypixel.hytale.protocol.io.ProtocolException;
import com.hypixel.hytale.protocol.io.ValidationResult;
import com.hypixel.hytale.protocol.io.VarInt;
import io.netty.buffer.ByteBuf;
import java.util.Objects;
import javax.annotation.Nonnull;

public class ContextMenuItem {
   public static final int NULLABLE_BIT_FIELD_SIZE = 0;
   public static final int FIXED_BLOCK_SIZE = 0;
   public static final int VARIABLE_FIELD_COUNT = 2;
   public static final int VARIABLE_BLOCK_START = 8;
   public static final int MAX_SIZE = 32768018;
   @Nonnull
   public String name = "";
   @Nonnull
   public String command = "";

   public ContextMenuItem() {
   }

   public ContextMenuItem(@Nonnull String name, @Nonnull String command) {
      this.name = name;
      this.command = command;
   }

   public ContextMenuItem(@Nonnull ContextMenuItem other) {
      this.name = other.name;
      this.command = other.command;
   }

   @Nonnull
   public static ContextMenuItem deserialize(@Nonnull ByteBuf buf, int offset) {
      ContextMenuItem obj = new ContextMenuItem();
      int varPos0 = offset + 8 + buf.getIntLE(offset + 0);
      int nameLen = VarInt.peek(buf, varPos0);
      if (nameLen < 0) {
         throw ProtocolException.negativeLength("Name", nameLen);
      } else if (nameLen > 4096000) {
         throw ProtocolException.stringTooLong("Name", nameLen, 4096000);
      } else {
         obj.name = PacketIO.readVarString(buf, varPos0, PacketIO.UTF8);
         varPos0 = offset + 8 + buf.getIntLE(offset + 4);
         nameLen = VarInt.peek(buf, varPos0);
         if (nameLen < 0) {
            throw ProtocolException.negativeLength("Command", nameLen);
         } else if (nameLen > 4096000) {
            throw ProtocolException.stringTooLong("Command", nameLen, 4096000);
         } else {
            obj.command = PacketIO.readVarString(buf, varPos0, PacketIO.UTF8);
            return obj;
         }
      }
   }

   public static int computeBytesConsumed(@Nonnull ByteBuf buf, int offset) {
      int maxEnd = 8;
      int fieldOffset0 = buf.getIntLE(offset + 0);
      int pos0 = offset + 8 + fieldOffset0;
      int sl = VarInt.peek(buf, pos0);
      pos0 += VarInt.length(buf, pos0) + sl;
      if (pos0 - offset > maxEnd) {
         maxEnd = pos0 - offset;
      }

      fieldOffset0 = buf.getIntLE(offset + 4);
      pos0 = offset + 8 + fieldOffset0;
      sl = VarInt.peek(buf, pos0);
      pos0 += VarInt.length(buf, pos0) + sl;
      if (pos0 - offset > maxEnd) {
         maxEnd = pos0 - offset;
      }

      return maxEnd;
   }

   public void serialize(@Nonnull ByteBuf buf) {
      int startPos = buf.writerIndex();
      int nameOffsetSlot = buf.writerIndex();
      buf.writeIntLE(0);
      int commandOffsetSlot = buf.writerIndex();
      buf.writeIntLE(0);
      int varBlockStart = buf.writerIndex();
      buf.setIntLE(nameOffsetSlot, buf.writerIndex() - varBlockStart);
      PacketIO.writeVarString(buf, this.name, 4096000);
      buf.setIntLE(commandOffsetSlot, buf.writerIndex() - varBlockStart);
      PacketIO.writeVarString(buf, this.command, 4096000);
   }

   public int computeSize() {
      int size = 8;
      size += PacketIO.stringSize(this.name);
      size += PacketIO.stringSize(this.command);
      return size;
   }

   public static ValidationResult validateStructure(@Nonnull ByteBuf buffer, int offset) {
      if (buffer.readableBytes() - offset < 8) {
         return ValidationResult.error("Buffer too small: expected at least 8 bytes");
      } else {
         int nameOffset = buffer.getIntLE(offset + 0);
         if (nameOffset < 0) {
            return ValidationResult.error("Invalid offset for Name");
         } else {
            int pos = offset + 8 + nameOffset;
            if (pos >= buffer.writerIndex()) {
               return ValidationResult.error("Offset out of bounds for Name");
            } else {
               int nameLen = VarInt.peek(buffer, pos);
               if (nameLen < 0) {
                  return ValidationResult.error("Invalid string length for Name");
               } else if (nameLen > 4096000) {
                  return ValidationResult.error("Name exceeds max length 4096000");
               } else {
                  pos += VarInt.length(buffer, pos);
                  pos += nameLen;
                  if (pos > buffer.writerIndex()) {
                     return ValidationResult.error("Buffer overflow reading Name");
                  } else {
                     nameOffset = buffer.getIntLE(offset + 4);
                     if (nameOffset < 0) {
                        return ValidationResult.error("Invalid offset for Command");
                     } else {
                        pos = offset + 8 + nameOffset;
                        if (pos >= buffer.writerIndex()) {
                           return ValidationResult.error("Offset out of bounds for Command");
                        } else {
                           nameLen = VarInt.peek(buffer, pos);
                           if (nameLen < 0) {
                              return ValidationResult.error("Invalid string length for Command");
                           } else if (nameLen > 4096000) {
                              return ValidationResult.error("Command exceeds max length 4096000");
                           } else {
                              pos += VarInt.length(buffer, pos);
                              pos += nameLen;
                              return pos > buffer.writerIndex() ? ValidationResult.error("Buffer overflow reading Command") : ValidationResult.OK;
                           }
                        }
                     }
                  }
               }
            }
         }
      }
   }

   public ContextMenuItem clone() {
      ContextMenuItem copy = new ContextMenuItem();
      copy.name = this.name;
      copy.command = this.command;
      return copy;
   }

   public boolean equals(Object obj) {
      if (this == obj) {
         return true;
      } else if (!(obj instanceof ContextMenuItem)) {
         return false;
      } else {
         ContextMenuItem other = (ContextMenuItem)obj;
         return Objects.equals(this.name, other.name) && Objects.equals(this.command, other.command);
      }
   }

   public int hashCode() {
      return Objects.hash(new Object[]{this.name, this.command});
   }
}