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use std::io::{Read, Seek, SeekFrom};
use crate::{
object::{Value, parser::FromValue},
unityfs::UnityFS,
};
use anyhow::{Result, anyhow, bail};
use serde::Serialize;
#[derive(Debug, Serialize)]
pub struct StreamingInfo {
pub offset: u64,
pub path: String,
pub size: u32,
}
impl FromValue for StreamingInfo {
fn from_value(v: Value) -> Result<Self> {
let mut fields = v.as_class("StreamingInfo")?;
Ok(StreamingInfo {
offset: fields.field("offset")?,
size: fields.field("size")?,
path: fields.field("path")?,
})
}
}
impl StreamingInfo {
pub fn read(&self, fs: &mut UnityFS<impl Read + Seek>) -> Result<Vec<u8>> {
if !self.path.starts_with("archive:") {
bail!("StreamingInfo path does not start on archive:")
}
let nodeinfo = fs
.header
.nodes()
.iter()
.find(|n| self.path.ends_with(&n.name))
.ok_or(anyhow!("node with path {:?} not found", self.path))?
.to_owned();
let mut buf = Vec::new();
let mut node = fs.read(&nodeinfo)?;
node.seek(SeekFrom::Start(self.offset))?;
node.take(self.size as u64).read_to_end(&mut buf)?;
Ok(buf)
}
}
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