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use std::collections::{HashMap, HashSet};
use futures::future::BoxFuture;
use super::{
curseforge::{
CurseForgeApi, CurseForgeFile, CurseForgeGetModFilesRequestBody,
CurseForgeGetModsByIdsListRequestBody, CurseForgeMod,
},
types::{ModpackFile, ParsedModpack},
};
const CURSEFORGE_RESOURCE_PACK_CLASS_ID: u64 = 12;
const CURSEFORGE_SHADER_PACK_CLASS_ID: u64 = 6552;
pub(crate) trait ModpackFileResolver: Send + Sync {
fn resolve<'a>(
&'a self,
modpack: ParsedModpack,
) -> BoxFuture<'a, Result<ParsedModpack, String>>;
}
pub(crate) struct ResolverChain {
resolvers: Vec<Box<dyn ModpackFileResolver>>,
}
impl ResolverChain {
pub(crate) fn new(resolvers: Vec<Box<dyn ModpackFileResolver>>) -> Self {
Self { resolvers }
}
pub(crate) fn push<R>(&mut self, resolver: R)
where
R: ModpackFileResolver + 'static,
{
self.resolvers.push(Box::new(resolver));
}
}
impl Default for ResolverChain {
fn default() -> Self {
Self::new(vec![Box::new(CurseForgeFileResolver::default())])
}
}
impl ModpackFileResolver for ResolverChain {
fn resolve<'a>(
&'a self,
mut modpack: ParsedModpack,
) -> BoxFuture<'a, Result<ParsedModpack, String>> {
Box::pin(async move {
for resolver in &self.resolvers {
modpack = resolver.resolve(modpack).await?;
}
Ok(modpack)
})
}
}
pub(crate) struct CurseForgeFileResolver {
api: CurseForgeApi,
}
impl CurseForgeFileResolver {
pub(crate) fn new(api: CurseForgeApi) -> Self {
Self { api }
}
async fn resolve_files(&self, files: &[ModpackFile]) -> Result<Vec<ModpackFile>, String> {
let file_ids: Vec<u64> = files.iter().filter_map(file_id).collect();
if file_ids.is_empty() {
return Ok(Vec::new());
}
let file_items = self
.api
.get_files(&CurseForgeGetModFilesRequestBody::new(file_ids))
.await?
.data;
let mod_ids: Vec<u64> = file_items
.iter()
.map(|item| item.mod_id)
.collect::<HashSet<_>>()
.into_iter()
.collect();
let class_ids = self.class_ids(&mod_ids).await;
Ok(file_items
.into_iter()
.map(|item| {
let class_id = class_ids.get(&item.mod_id).copied();
map_curseforge_file(item, class_id)
})
.collect())
}
async fn class_ids(&self, mod_ids: &[u64]) -> HashMap<u64, u64> {
let Ok(mods) = self
.api
.get_mods(&CurseForgeGetModsByIdsListRequestBody::new(
mod_ids.to_vec(),
))
.await
.map(|response| response.data)
else {
return HashMap::new();
};
mods.into_iter().filter_map(mod_class_entry).collect()
}
}
impl Default for CurseForgeFileResolver {
fn default() -> Self {
Self::new(CurseForgeApi::default())
}
}
impl ModpackFileResolver for CurseForgeFileResolver {
fn resolve<'a>(
&'a self,
mut modpack: ParsedModpack,
) -> BoxFuture<'a, Result<ParsedModpack, String>> {
Box::pin(async move {
if modpack.info.modpack_type != "curseforge" {
return Ok(modpack);
}
let files = self.resolve_files(&modpack.files).await?;
modpack.files = files;
Ok(modpack)
})
}
}
fn file_id(file: &ModpackFile) -> Option<u64> {
file.url
.strip_prefix("curseforge://")?
.split(':')
.nth(1)?
.parse()
.ok()
}
fn map_curseforge_file(file: CurseForgeFile, class_id: Option<u64>) -> ModpackFile {
let CurseForgeFile {
id,
file_name,
download_url,
file_length,
..
} = file;
let url = download_url.unwrap_or_else(|| {
format!(
"https://edge.forgecdn.net/files/{}/{}/{}",
id / 1000,
id % 1000,
file_name
)
});
let path = match class_id {
Some(CURSEFORGE_RESOURCE_PACK_CLASS_ID) => format!("resourcepacks/{file_name}"),
Some(CURSEFORGE_SHADER_PACK_CLASS_ID) => format!("shaderpacks/{file_name}"),
_ => format!("mods/{file_name}"),
};
ModpackFile {
url,
path,
size: Some(file_length),
sha1: None,
}
}
fn mod_class_entry(item: CurseForgeMod) -> Option<(u64, u64)> {
Some((item.id, item.class_id?))
}
|