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use azalea_buf::{BufReadError, McBuf};
use azalea_buf::{McBufReadable, McBufWritable};
use azalea_core::ResourceLocation;
use azalea_protocol_macros::ClientboundGamePacket;
use std::io::{Cursor, Write};
use uuid::Uuid;
#[derive(Clone, Debug, McBuf, ClientboundGamePacket)]
pub struct ClientboundUpdateAttributesPacket {
#[var]
pub entity_id: u32,
pub attributes: Vec<AttributeSnapshot>,
}
#[derive(Clone, Debug, McBuf)]
pub struct AttributeSnapshot {
pub attribute: ResourceLocation,
pub base: f64,
pub modifiers: Vec<Modifier>,
}
#[derive(Clone, Debug, McBuf)]
pub struct Modifier {
pub uuid: Uuid,
pub amount: f64,
pub operation: u8,
}
#[derive(Clone, Debug, Copy)]
enum Operation {
Addition = 0,
MultiplyBase = 1,
MultiplyTotal = 2,
}
impl McBufReadable for Operation {
fn read_from(buf: &mut Cursor<&[u8]>) -> Result<Self, BufReadError> {
match u8::read_from(buf)? {
0 => Ok(Operation::Addition),
1 => Ok(Operation::MultiplyBase),
2 => Ok(Operation::MultiplyTotal),
id => Err(BufReadError::UnexpectedEnumVariant { id: id.into() }),
}
}
}
impl McBufWritable for Operation {
fn write_into(&self, buf: &mut impl Write) -> Result<(), std::io::Error> {
(*self as u8).write_into(buf)?;
Ok(())
}
}
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