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use anyhow::Result;
use turbo_tasks::{FxIndexMap, ReadRef, ResolvedVc, Vc};
use turbopack_core::{chunk::ModuleId, code_builder::Code};
use super::{content::EcmascriptBrowserChunkContent, version::EcmascriptBrowserChunkVersion};
#[allow(clippy::large_enum_variant)]
pub(super) enum EcmascriptChunkUpdate {
None,
Partial(EcmascriptChunkPartialUpdate),
}
pub(super) struct EcmascriptChunkPartialUpdate {
pub added: FxIndexMap<ReadRef<ModuleId>, (u64, ResolvedVc<Code>)>,
pub deleted: FxIndexMap<ReadRef<ModuleId>, u64>,
pub modified: FxIndexMap<ReadRef<ModuleId>, ResolvedVc<Code>>,
}
pub(super) async fn update_ecmascript_chunk(
content: Vc<EcmascriptBrowserChunkContent>,
from: &ReadRef<EcmascriptBrowserChunkVersion>,
) -> Result<EcmascriptChunkUpdate> {
let to = content.own_version().await?;
// When to and from point to the same value we can skip comparing them. This will happen since
// `TraitRef::<Box<dyn Version>>::cell` will not clone the value, but only make the cell point
// to the same immutable value (`Arc`).
if from.ptr_eq(&to) {
return Ok(EcmascriptChunkUpdate::None);
}
let entries = content.entries().await?;
let mut added = FxIndexMap::default();
let mut modified = FxIndexMap::default();
let mut deleted = FxIndexMap::default();
for (id, from_hash) in &from.entries_hashes {
if let Some(entry) = entries.get(id) {
if *entry.hash.await? != *from_hash {
modified.insert(id.clone(), entry.code);
}
} else {
deleted.insert(id.clone(), *from_hash);
}
}
// Remaining entries are added
for (id, entry) in entries.iter() {
if !from.entries_hashes.contains_key(id) {
added.insert(id.clone(), (*entry.hash.await?, entry.code));
}
}
let update = if added.is_empty() && modified.is_empty() && deleted.is_empty() {
EcmascriptChunkUpdate::None
} else {
EcmascriptChunkUpdate::Partial(EcmascriptChunkPartialUpdate {
added,
modified,
deleted,
})
};
Ok(update)
}
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