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use azalea_buf::McBufVarReadable;
use azalea_buf::{McBuf, McBufReadable, McBufWritable};
use azalea_chat::component::Component;
use azalea_core::{BlockPos, Direction, Particle, Slot};
use std::io::{Read, Write};
use uuid::Uuid;
#[derive(Clone, Debug)]
pub struct EntityMetadata(Vec<EntityDataItem>);
#[derive(Clone, Debug)]
pub struct EntityDataItem {
// we can't identify what the index is for here because we don't know the
// entity type
pub index: u8,
pub value: EntityDataValue,
}
impl McBufReadable for EntityMetadata {
fn read_from(buf: &mut impl Read) -> Result<Self, String> {
let mut metadata = Vec::new();
loop {
let index = u8::read_from(buf)?;
if index == 0xff {
break;
}
let value = EntityDataValue::read_from(buf)?;
metadata.push(EntityDataItem { index, value });
}
Ok(EntityMetadata(metadata))
}
}
impl McBufWritable for EntityMetadata {
fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
for item in &self.0 {
item.index.write_into(buf)?;
item.value.write_into(buf)?;
}
0xffu8.write_into(buf)?;
Ok(())
}
}
#[derive(Clone, Debug)]
pub enum EntityDataValue {
Byte(u8),
// varint
Int(i32),
Float(f32),
String(String),
Component(Component),
OptionalComponent(Option<Component>),
ItemStack(Slot),
Boolean(bool),
Rotations { x: f32, y: f32, z: f32 },
BlockPos(BlockPos),
OptionalBlockPos(Option<BlockPos>),
Direction(Direction),
OptionalUuid(Option<Uuid>),
// 0 for absent (implies air); otherwise, a block state ID as per the global palette
// this is a varint
OptionalBlockState(Option<i32>),
CompoundTag(azalea_nbt::Tag),
Particle(Particle),
VillagerData(VillagerData),
// 0 for absent; 1 + actual value otherwise. Used for entity IDs.
OptionalUnsignedInt(Option<u32>),
Pose(Pose),
}
impl McBufReadable for EntityDataValue {
fn read_from(buf: &mut impl Read) -> Result<Self, String> {
let data_type = i32::var_read_from(buf)?;
Ok(match data_type {
0 => EntityDataValue::Byte(u8::read_from(buf)?),
1 => EntityDataValue::Int(i32::var_read_from(buf)?),
2 => EntityDataValue::Float(f32::read_from(buf)?),
3 => EntityDataValue::String(String::read_from(buf)?),
4 => EntityDataValue::Component(Component::read_from(buf)?),
5 => EntityDataValue::OptionalComponent(Option::<Component>::read_from(buf)?),
6 => EntityDataValue::ItemStack(Slot::read_from(buf)?),
7 => EntityDataValue::Boolean(bool::read_from(buf)?),
8 => EntityDataValue::Rotations {
x: f32::read_from(buf)?,
y: f32::read_from(buf)?,
z: f32::read_from(buf)?,
},
9 => EntityDataValue::BlockPos(BlockPos::read_from(buf)?),
10 => EntityDataValue::OptionalBlockPos(Option::<BlockPos>::read_from(buf)?),
11 => EntityDataValue::Direction(Direction::read_from(buf)?),
12 => EntityDataValue::OptionalUuid(Option::<Uuid>::read_from(buf)?),
13 => EntityDataValue::OptionalBlockState({
let val = i32::read_from(buf)?;
if val == 0 {
None
} else {
Some(val)
}
}),
14 => EntityDataValue::CompoundTag(azalea_nbt::Tag::read_from(buf)?),
15 => EntityDataValue::Particle(Particle::read_from(buf)?),
16 => EntityDataValue::VillagerData(VillagerData::read_from(buf)?),
17 => EntityDataValue::OptionalUnsignedInt({
let val = u32::var_read_from(buf)?;
if val == 0 {
None
} else {
Some((val - 1) as u32)
}
}),
18 => EntityDataValue::Pose(Pose::read_from(buf)?),
_ => return Err(format!("Unknown entity data type: {}", data_type)),
})
}
}
impl McBufWritable for EntityDataValue {
fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
todo!();
}
}
#[derive(Clone, Debug, Copy, McBuf)]
pub enum Pose {
Standing = 0,
FallFlying = 1,
Sleeping = 2,
Swimming = 3,
SpinAttack = 4,
Sneaking = 5,
LongJumping = 6,
Dying = 7,
}
#[derive(Debug, Clone, McBuf)]
pub struct VillagerData {
#[var]
type_: u32,
#[var]
profession: u32,
#[var]
level: u32,
}
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