295 lines
10 KiB
Java
295 lines
10 KiB
Java
package com.hypixel.hytale.protocol.packets.asseteditor;
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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 AssetInfo {
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public static final int NULLABLE_BIT_FIELD_SIZE = 1;
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public static final int FIXED_BLOCK_SIZE = 11;
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public static final int VARIABLE_FIELD_COUNT = 3;
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public static final int VARIABLE_BLOCK_START = 23;
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public static final int MAX_SIZE = 81920066;
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@Nullable
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public AssetPath path;
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@Nullable
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public AssetPath oldPath;
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public boolean isDeleted;
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public boolean isNew;
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public long lastModificationDate;
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@Nullable
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public String lastModificationUsername;
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public AssetInfo() {
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}
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public AssetInfo(
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@Nullable AssetPath path,
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@Nullable AssetPath oldPath,
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boolean isDeleted,
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boolean isNew,
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long lastModificationDate,
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@Nullable String lastModificationUsername
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) {
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this.path = path;
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this.oldPath = oldPath;
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this.isDeleted = isDeleted;
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this.isNew = isNew;
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this.lastModificationDate = lastModificationDate;
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this.lastModificationUsername = lastModificationUsername;
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}
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public AssetInfo(@Nonnull AssetInfo other) {
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this.path = other.path;
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this.oldPath = other.oldPath;
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this.isDeleted = other.isDeleted;
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this.isNew = other.isNew;
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this.lastModificationDate = other.lastModificationDate;
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this.lastModificationUsername = other.lastModificationUsername;
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}
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@Nonnull
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public static AssetInfo deserialize(@Nonnull ByteBuf buf, int offset) {
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AssetInfo obj = new AssetInfo();
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byte nullBits = buf.getByte(offset);
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obj.isDeleted = buf.getByte(offset + 1) != 0;
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obj.isNew = buf.getByte(offset + 2) != 0;
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obj.lastModificationDate = buf.getLongLE(offset + 3);
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if ((nullBits & 1) != 0) {
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int varPos0 = offset + 23 + buf.getIntLE(offset + 11);
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obj.path = AssetPath.deserialize(buf, varPos0);
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}
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if ((nullBits & 2) != 0) {
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int varPos1 = offset + 23 + buf.getIntLE(offset + 15);
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obj.oldPath = AssetPath.deserialize(buf, varPos1);
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}
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if ((nullBits & 4) != 0) {
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int varPos2 = offset + 23 + buf.getIntLE(offset + 19);
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int lastModificationUsernameLen = VarInt.peek(buf, varPos2);
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if (lastModificationUsernameLen < 0) {
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throw ProtocolException.negativeLength("LastModificationUsername", lastModificationUsernameLen);
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}
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if (lastModificationUsernameLen > 4096000) {
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throw ProtocolException.stringTooLong("LastModificationUsername", lastModificationUsernameLen, 4096000);
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}
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obj.lastModificationUsername = 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 = 23;
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if ((nullBits & 1) != 0) {
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int fieldOffset0 = buf.getIntLE(offset + 11);
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int pos0 = offset + 23 + fieldOffset0;
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pos0 += AssetPath.computeBytesConsumed(buf, pos0);
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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 + 15);
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int pos1 = offset + 23 + fieldOffset1;
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pos1 += AssetPath.computeBytesConsumed(buf, pos1);
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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 + 19);
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int pos2 = offset + 23 + 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.path != null) {
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nullBits = (byte)(nullBits | 1);
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}
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if (this.oldPath != null) {
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nullBits = (byte)(nullBits | 2);
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}
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if (this.lastModificationUsername != 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.isDeleted ? 1 : 0);
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buf.writeByte(this.isNew ? 1 : 0);
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buf.writeLongLE(this.lastModificationDate);
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int pathOffsetSlot = buf.writerIndex();
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buf.writeIntLE(0);
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int oldPathOffsetSlot = buf.writerIndex();
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buf.writeIntLE(0);
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int lastModificationUsernameOffsetSlot = buf.writerIndex();
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buf.writeIntLE(0);
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int varBlockStart = buf.writerIndex();
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if (this.path != null) {
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buf.setIntLE(pathOffsetSlot, buf.writerIndex() - varBlockStart);
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this.path.serialize(buf);
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} else {
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buf.setIntLE(pathOffsetSlot, -1);
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}
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if (this.oldPath != null) {
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buf.setIntLE(oldPathOffsetSlot, buf.writerIndex() - varBlockStart);
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this.oldPath.serialize(buf);
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} else {
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buf.setIntLE(oldPathOffsetSlot, -1);
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}
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if (this.lastModificationUsername != null) {
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buf.setIntLE(lastModificationUsernameOffsetSlot, buf.writerIndex() - varBlockStart);
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PacketIO.writeVarString(buf, this.lastModificationUsername, 4096000);
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} else {
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buf.setIntLE(lastModificationUsernameOffsetSlot, -1);
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}
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}
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public int computeSize() {
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int size = 23;
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if (this.path != null) {
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size += this.path.computeSize();
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}
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if (this.oldPath != null) {
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size += this.oldPath.computeSize();
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}
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if (this.lastModificationUsername != null) {
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size += PacketIO.stringSize(this.lastModificationUsername);
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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 < 23) {
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return ValidationResult.error("Buffer too small: expected at least 23 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 pathOffset = buffer.getIntLE(offset + 11);
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if (pathOffset < 0) {
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return ValidationResult.error("Invalid offset for Path");
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}
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int pos = offset + 23 + pathOffset;
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if (pos >= buffer.writerIndex()) {
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return ValidationResult.error("Offset out of bounds for Path");
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}
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ValidationResult pathResult = AssetPath.validateStructure(buffer, pos);
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if (!pathResult.isValid()) {
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return ValidationResult.error("Invalid Path: " + pathResult.error());
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}
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pos += AssetPath.computeBytesConsumed(buffer, pos);
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}
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if ((nullBits & 2) != 0) {
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int oldPathOffset = buffer.getIntLE(offset + 15);
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if (oldPathOffset < 0) {
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return ValidationResult.error("Invalid offset for OldPath");
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}
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int posx = offset + 23 + oldPathOffset;
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if (posx >= buffer.writerIndex()) {
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return ValidationResult.error("Offset out of bounds for OldPath");
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}
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ValidationResult oldPathResult = AssetPath.validateStructure(buffer, posx);
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if (!oldPathResult.isValid()) {
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return ValidationResult.error("Invalid OldPath: " + oldPathResult.error());
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}
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posx += AssetPath.computeBytesConsumed(buffer, posx);
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}
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if ((nullBits & 4) != 0) {
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int lastModificationUsernameOffset = buffer.getIntLE(offset + 19);
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if (lastModificationUsernameOffset < 0) {
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return ValidationResult.error("Invalid offset for LastModificationUsername");
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}
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int posxx = offset + 23 + lastModificationUsernameOffset;
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if (posxx >= buffer.writerIndex()) {
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return ValidationResult.error("Offset out of bounds for LastModificationUsername");
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}
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int lastModificationUsernameLen = VarInt.peek(buffer, posxx);
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if (lastModificationUsernameLen < 0) {
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return ValidationResult.error("Invalid string length for LastModificationUsername");
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}
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if (lastModificationUsernameLen > 4096000) {
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return ValidationResult.error("LastModificationUsername exceeds max length 4096000");
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}
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posxx += VarInt.length(buffer, posxx);
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posxx += lastModificationUsernameLen;
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if (posxx > buffer.writerIndex()) {
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return ValidationResult.error("Buffer overflow reading LastModificationUsername");
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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 AssetInfo clone() {
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AssetInfo copy = new AssetInfo();
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copy.path = this.path != null ? this.path.clone() : null;
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copy.oldPath = this.oldPath != null ? this.oldPath.clone() : null;
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copy.isDeleted = this.isDeleted;
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copy.isNew = this.isNew;
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copy.lastModificationDate = this.lastModificationDate;
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copy.lastModificationUsername = this.lastModificationUsername;
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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 AssetInfo other)
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? false
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: Objects.equals(this.path, other.path)
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&& Objects.equals(this.oldPath, other.oldPath)
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&& this.isDeleted == other.isDeleted
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&& this.isNew == other.isNew
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&& this.lastModificationDate == other.lastModificationDate
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&& Objects.equals(this.lastModificationUsername, other.lastModificationUsername);
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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.path, this.oldPath, this.isDeleted, this.isNew, this.lastModificationDate, this.lastModificationUsername);
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}
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}
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