311 lines
9.7 KiB
Java
311 lines
9.7 KiB
Java
package com.hypixel.hytale.protocol.packets.interface_;
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import com.hypixel.hytale.protocol.io.PacketIO;
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import com.hypixel.hytale.protocol.io.ProtocolException;
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import com.hypixel.hytale.protocol.io.ValidationResult;
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import com.hypixel.hytale.protocol.io.VarInt;
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import io.netty.buffer.ByteBuf;
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import java.util.Objects;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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public class CustomUICommand {
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public static final int NULLABLE_BIT_FIELD_SIZE = 1;
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public static final int FIXED_BLOCK_SIZE = 2;
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public static final int VARIABLE_FIELD_COUNT = 3;
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public static final int VARIABLE_BLOCK_START = 14;
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public static final int MAX_SIZE = 49152029;
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@Nonnull
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public CustomUICommandType type = CustomUICommandType.Append;
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@Nullable
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public String selector;
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@Nullable
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public String data;
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@Nullable
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public String text;
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public CustomUICommand() {
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}
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public CustomUICommand(@Nonnull CustomUICommandType type, @Nullable String selector, @Nullable String data, @Nullable String text) {
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this.type = type;
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this.selector = selector;
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this.data = data;
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this.text = text;
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}
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public CustomUICommand(@Nonnull CustomUICommand other) {
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this.type = other.type;
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this.selector = other.selector;
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this.data = other.data;
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this.text = other.text;
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}
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@Nonnull
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public static CustomUICommand deserialize(@Nonnull ByteBuf buf, int offset) {
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CustomUICommand obj = new CustomUICommand();
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byte nullBits = buf.getByte(offset);
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obj.type = CustomUICommandType.fromValue(buf.getByte(offset + 1));
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if ((nullBits & 1) != 0) {
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int varPos0 = offset + 14 + buf.getIntLE(offset + 2);
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int selectorLen = VarInt.peek(buf, varPos0);
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if (selectorLen < 0) {
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throw ProtocolException.negativeLength("Selector", selectorLen);
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}
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if (selectorLen > 4096000) {
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throw ProtocolException.stringTooLong("Selector", selectorLen, 4096000);
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}
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obj.selector = PacketIO.readVarString(buf, varPos0, PacketIO.UTF8);
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}
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if ((nullBits & 2) != 0) {
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int varPos1 = offset + 14 + buf.getIntLE(offset + 6);
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int dataLen = VarInt.peek(buf, varPos1);
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if (dataLen < 0) {
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throw ProtocolException.negativeLength("Data", dataLen);
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}
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if (dataLen > 4096000) {
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throw ProtocolException.stringTooLong("Data", dataLen, 4096000);
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}
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obj.data = PacketIO.readVarString(buf, varPos1, PacketIO.UTF8);
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}
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if ((nullBits & 4) != 0) {
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int varPos2 = offset + 14 + buf.getIntLE(offset + 10);
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int textLen = VarInt.peek(buf, varPos2);
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if (textLen < 0) {
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throw ProtocolException.negativeLength("Text", textLen);
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}
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if (textLen > 4096000) {
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throw ProtocolException.stringTooLong("Text", textLen, 4096000);
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}
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obj.text = PacketIO.readVarString(buf, varPos2, PacketIO.UTF8);
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}
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return obj;
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}
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public static int computeBytesConsumed(@Nonnull ByteBuf buf, int offset) {
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byte nullBits = buf.getByte(offset);
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int maxEnd = 14;
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if ((nullBits & 1) != 0) {
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int fieldOffset0 = buf.getIntLE(offset + 2);
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int pos0 = offset + 14 + fieldOffset0;
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int sl = VarInt.peek(buf, pos0);
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pos0 += VarInt.length(buf, pos0) + sl;
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if (pos0 - offset > maxEnd) {
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maxEnd = pos0 - offset;
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}
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}
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if ((nullBits & 2) != 0) {
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int fieldOffset1 = buf.getIntLE(offset + 6);
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int pos1 = offset + 14 + fieldOffset1;
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int sl = VarInt.peek(buf, pos1);
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pos1 += VarInt.length(buf, pos1) + sl;
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if (pos1 - offset > maxEnd) {
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maxEnd = pos1 - offset;
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}
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}
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if ((nullBits & 4) != 0) {
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int fieldOffset2 = buf.getIntLE(offset + 10);
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int pos2 = offset + 14 + fieldOffset2;
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int sl = VarInt.peek(buf, pos2);
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pos2 += VarInt.length(buf, pos2) + sl;
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if (pos2 - offset > maxEnd) {
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maxEnd = pos2 - offset;
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}
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}
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return maxEnd;
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}
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public void serialize(@Nonnull ByteBuf buf) {
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int startPos = buf.writerIndex();
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byte nullBits = 0;
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if (this.selector != null) {
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nullBits = (byte)(nullBits | 1);
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}
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if (this.data != null) {
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nullBits = (byte)(nullBits | 2);
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}
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if (this.text != null) {
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nullBits = (byte)(nullBits | 4);
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}
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buf.writeByte(nullBits);
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buf.writeByte(this.type.getValue());
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int selectorOffsetSlot = buf.writerIndex();
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buf.writeIntLE(0);
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int dataOffsetSlot = buf.writerIndex();
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buf.writeIntLE(0);
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int textOffsetSlot = buf.writerIndex();
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buf.writeIntLE(0);
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int varBlockStart = buf.writerIndex();
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if (this.selector != null) {
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buf.setIntLE(selectorOffsetSlot, buf.writerIndex() - varBlockStart);
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PacketIO.writeVarString(buf, this.selector, 4096000);
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} else {
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buf.setIntLE(selectorOffsetSlot, -1);
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}
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if (this.data != null) {
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buf.setIntLE(dataOffsetSlot, buf.writerIndex() - varBlockStart);
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PacketIO.writeVarString(buf, this.data, 4096000);
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} else {
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buf.setIntLE(dataOffsetSlot, -1);
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}
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if (this.text != null) {
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buf.setIntLE(textOffsetSlot, buf.writerIndex() - varBlockStart);
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PacketIO.writeVarString(buf, this.text, 4096000);
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} else {
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buf.setIntLE(textOffsetSlot, -1);
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}
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}
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public int computeSize() {
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int size = 14;
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if (this.selector != null) {
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size += PacketIO.stringSize(this.selector);
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}
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if (this.data != null) {
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size += PacketIO.stringSize(this.data);
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}
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if (this.text != null) {
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size += PacketIO.stringSize(this.text);
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}
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return size;
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}
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public static ValidationResult validateStructure(@Nonnull ByteBuf buffer, int offset) {
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if (buffer.readableBytes() - offset < 14) {
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return ValidationResult.error("Buffer too small: expected at least 14 bytes");
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} else {
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byte nullBits = buffer.getByte(offset);
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if ((nullBits & 1) != 0) {
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int selectorOffset = buffer.getIntLE(offset + 2);
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if (selectorOffset < 0) {
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return ValidationResult.error("Invalid offset for Selector");
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}
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int pos = offset + 14 + selectorOffset;
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if (pos >= buffer.writerIndex()) {
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return ValidationResult.error("Offset out of bounds for Selector");
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}
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int selectorLen = VarInt.peek(buffer, pos);
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if (selectorLen < 0) {
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return ValidationResult.error("Invalid string length for Selector");
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}
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if (selectorLen > 4096000) {
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return ValidationResult.error("Selector exceeds max length 4096000");
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}
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pos += VarInt.length(buffer, pos);
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pos += selectorLen;
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if (pos > buffer.writerIndex()) {
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return ValidationResult.error("Buffer overflow reading Selector");
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}
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}
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if ((nullBits & 2) != 0) {
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int dataOffset = buffer.getIntLE(offset + 6);
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if (dataOffset < 0) {
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return ValidationResult.error("Invalid offset for Data");
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}
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int posx = offset + 14 + dataOffset;
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if (posx >= buffer.writerIndex()) {
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return ValidationResult.error("Offset out of bounds for Data");
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}
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int dataLen = VarInt.peek(buffer, posx);
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if (dataLen < 0) {
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return ValidationResult.error("Invalid string length for Data");
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}
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if (dataLen > 4096000) {
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return ValidationResult.error("Data exceeds max length 4096000");
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}
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posx += VarInt.length(buffer, posx);
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posx += dataLen;
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if (posx > buffer.writerIndex()) {
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return ValidationResult.error("Buffer overflow reading Data");
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}
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}
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if ((nullBits & 4) != 0) {
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int textOffset = buffer.getIntLE(offset + 10);
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if (textOffset < 0) {
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return ValidationResult.error("Invalid offset for Text");
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}
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int posxx = offset + 14 + textOffset;
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if (posxx >= buffer.writerIndex()) {
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return ValidationResult.error("Offset out of bounds for Text");
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}
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int textLen = VarInt.peek(buffer, posxx);
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if (textLen < 0) {
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return ValidationResult.error("Invalid string length for Text");
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}
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if (textLen > 4096000) {
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return ValidationResult.error("Text exceeds max length 4096000");
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}
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posxx += VarInt.length(buffer, posxx);
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posxx += textLen;
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if (posxx > buffer.writerIndex()) {
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return ValidationResult.error("Buffer overflow reading Text");
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}
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}
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return ValidationResult.OK;
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}
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}
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public CustomUICommand clone() {
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CustomUICommand copy = new CustomUICommand();
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copy.type = this.type;
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copy.selector = this.selector;
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copy.data = this.data;
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copy.text = this.text;
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return copy;
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj) {
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return true;
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} else {
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return !(obj instanceof CustomUICommand other)
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? false
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: Objects.equals(this.type, other.type)
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&& Objects.equals(this.selector, other.selector)
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&& Objects.equals(this.data, other.data)
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&& Objects.equals(this.text, other.text);
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}
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}
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@Override
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public int hashCode() {
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return Objects.hash(this.type, this.selector, this.data, this.text);
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}
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}
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