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use crate::{
classes::pptr::PPtr,
serialized_file::SerializedFile,
unityfs::{NodeReader, UnityFS, block_reader::BlockReader, multi_reader::MultiReader},
};
use anyhow::{Context, Result, anyhow};
use std::{
io::{Read, Seek},
marker::PhantomData,
};
/// High-level wrapper around UnityFS, SerializedFile and all the classes.
pub struct AssetBundle<T> {
pub fs: UnityFS<T>,
pub(crate) main: SerializedFile<NodeReader<BlockReader<MultiReader<T>>>>,
pub(crate) shared_assets: Option<SerializedFile<NodeReader<BlockReader<MultiReader<T>>>>>,
}
impl<T: Read + Seek> AssetBundle<T> {
pub fn open(inner: T) -> Result<Self> {
let fs = UnityFS::open(inner).context("opening UnityFS")?;
let main_ni = fs
.find_main_file()
.ok_or(anyhow!("AssetBundle seems to lack main file"))?;
let main = SerializedFile::read(fs.read(main_ni)?)?;
let shared_assets = if let Some(n) = main.find_fs_shared_assets(&fs) {
Some(SerializedFile::read(fs.read(&n)?)?)
} else {
None
};
Ok(Self {
fs,
main,
shared_assets,
})
}
pub fn all_toplevel_of_class(&self, class_name: &str) -> impl Iterator<Item = PPtr> {
self.main
.all_objects_of_class(class_name)
.map(|o| (0, o))
.chain(
self.shared_assets
.as_ref()
.map(|e| e.all_objects_of_class(class_name).map(|o| (1, o)))
.into_iter()
.flatten(),
)
.map(|(fi, o)| PPtr {
class: class_name.to_owned(),
file_id: fi,
path_id: o.path_id,
_class: PhantomData,
})
}
}
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