/// <summary>
/// Read a single item slot from a cache of bytes and remove it from the cache
/// </summary>
/// <returns>The item that was read or NULL for an empty slot</returns>
public Item ReadNextItemSlot(Queue <byte> cache, ItemPalette itemPalette)
{
List <byte> slotData = new List <byte>();
if (protocolversion > Protocol18Handler.MC113Version)
{
// MC 1.13 and greater
bool itemPresent = ReadNextBool(cache);
if (itemPresent)
{
ItemType type = itemPalette.FromId(ReadNextVarInt(cache));
byte itemCount = ReadNextByte(cache);
Dictionary <string, object> nbt = ReadNextNbt(cache);
return(new Item(type, itemCount, nbt));
}
else
{
return(null);
}
}
else
{
// MC 1.12.2 and lower
short itemID = ReadNextShort(cache);
if (itemID == -1)
{
return(null);
}
byte itemCount = ReadNextByte(cache);
short itemDamage = ReadNextShort(cache);
Dictionary <string, object> nbt = ReadNextNbt(cache);
return(new Item(itemPalette.FromId(itemID), itemCount, nbt));
}
}
/// <summary>
/// Get a byte array representing the given item as an item slot
/// </summary>
/// <param name="item">Item</param>
/// <param name="itemPalette">Item Palette</param>
/// <returns>Item slot representation</returns>
public byte[] GetItemSlot(Item item, ItemPalette itemPalette)
{
List <byte> slotData = new List <byte>();
if (protocolversion > Protocol18Handler.MC113Version)
{
// MC 1.13 and greater
if (item == null || item.IsEmpty)
{
slotData.Add(0); // No item
}
else
{
slotData.Add(1); // Item is present
slotData.AddRange(GetVarInt(itemPalette.ToId(item.Type)));
slotData.Add((byte)item.Count);
slotData.AddRange(GetNbt(item.NBT));
}
}
else
{
// MC 1.12.2 and lower
if (item == null || item.IsEmpty)
{
slotData.AddRange(GetShort(-1));
}
else
{
slotData.AddRange(GetShort((short)itemPalette.ToId(item.Type)));
slotData.Add((byte)item.Count);
slotData.AddRange(GetNbt(item.NBT));
}
}
return(slotData.ToArray());
}
/// <summary>
/// Read a single villager trade from a cache of bytes and remove it from the cache
/// </summary>
/// <returns>The item that was read or NULL for an empty slot</returns>
public VillagerTrade ReadNextTrade(Queue <byte> cache, ItemPalette itemPalette)
{
Item inputItem1 = ReadNextItemSlot(cache, itemPalette);
Item outputItem = ReadNextItemSlot(cache, itemPalette);
Item inputItem2 = null;
if (ReadNextBool(cache)) //check if villager has second item
{
inputItem2 = ReadNextItemSlot(cache, itemPalette);
}
bool tradeDisabled = ReadNextBool(cache);
int numberOfTradeUses = ReadNextInt(cache);
int maximumNumberOfTradeUses = ReadNextInt(cache);
int xp = ReadNextInt(cache);
int specialPrice = ReadNextInt(cache);
float priceMultiplier = ReadNextFloat(cache);
int demand = ReadNextInt(cache);
return(new VillagerTrade(inputItem1, outputItem, inputItem2, tradeDisabled, numberOfTradeUses, maximumNumberOfTradeUses, xp, specialPrice, priceMultiplier, demand));
}
public Dictionary <int, object> ReadNextMetadata(Queue <byte> cache, ItemPalette itemPalette)
{
Dictionary <int, object> data = new Dictionary <int, object>();
byte key = ReadNextByte(cache);
while (key != 0xff)
{
int type = ReadNextVarInt(cache);
// starting from 1.13, Optional Chat is inserted as number 5 in 1.13 and IDs after 5 got shifted.
// Increase type ID by 1 if
// - below 1.13
// - type ID larger than 4
if (protocolversion < Protocol18Handler.MC113Version)
{
if (type > 4)
{
type += 1;
}
}
// Value's data type is depended on Type
object value = null;
// This is backward compatible since new type is appended to the end
// Version upgrade note
// - Check type ID got shifted or not
// - Add new type if any
switch (type)
{
case 0: // byte
value = ReadNextByte(cache);
break;
case 1: // VarInt
value = ReadNextVarInt(cache);
break;
case 2: // Float
value = ReadNextFloat(cache);
break;
case 3: // String
value = ReadNextString(cache);
break;
case 4: // Chat
value = ReadNextString(cache);
break;
case 5: // Optional Chat
if (ReadNextBool(cache))
{
value = ReadNextString(cache);
}
break;
case 6: // Slot
value = ReadNextItemSlot(cache, itemPalette);
break;
case 7: // Boolean
value = ReadNextBool(cache);
break;
case 8: // Rotation (3x floats)
List <float> t = new List <float>();
t.Add(ReadNextFloat(cache));
t.Add(ReadNextFloat(cache));
t.Add(ReadNextFloat(cache));
value = t;
break;
case 9: // Position
value = ReadNextLocation(cache);
break;
case 10: // Optional Position
if (ReadNextBool(cache))
{
value = ReadNextLocation(cache);
}
break;
case 11: // Direction (VarInt)
value = ReadNextVarInt(cache);
break;
case 12: // Optional UUID
if (ReadNextBool(cache))
{
value = ReadNextUUID(cache);
}
break;
case 13: // Optional BlockID (VarInt)
value = ReadNextVarInt(cache);
break;
case 14: // NBT
value = ReadNextNbt(cache);
break;
case 15: // Particle
// Currecutly not handled. Reading data only
int ParticleID = ReadNextVarInt(cache);
switch (ParticleID)
{
case 3:
ReadNextVarInt(cache);
break;
case 14:
ReadNextFloat(cache);
ReadNextFloat(cache);
ReadNextFloat(cache);
ReadNextFloat(cache);
break;
case 23:
ReadNextVarInt(cache);
break;
case 32:
ReadNextItemSlot(cache, itemPalette);
break;
}
break;
case 16: // Villager Data (3x VarInt)
List <int> d = new List <int>();
d.Add(ReadNextVarInt(cache));
d.Add(ReadNextVarInt(cache));
d.Add(ReadNextVarInt(cache));
value = d;
break;
case 17: // Optional VarInt
if (ReadNextBool(cache))
{
value = ReadNextVarInt(cache);
}
break;
case 18: // Pose
value = ReadNextVarInt(cache);
break;
default:
throw new System.IO.InvalidDataException("Unknown Metadata Type ID " + type + ". Is this up to date for new MC Version?");
}
data[key] = value;
key = ReadNextByte(cache);
}
return(data);
}
