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use super::lifecycle::Relocate;
use super::*;
impl<H, F, G, C> Ctx<'_, H, F, G, C>
where
H: Http,
F: Filesystem,
G: Ffmpeg,
C: Clock,
{
/// Commit one prepared stem result serially, in plan order.
///
/// Writes the pre-fetched bytes (including any WAV render), removes any stale
/// copy left at the previously tracked path, and records the stem slot.
/// All filesystem and manifest effects are identical to what the former serial
/// [`write_stem`] did; moving the slow fetch into [`prepare`] is the only change.
///
/// Skipped when the owning clip's audio is absent from the manifest.
pub(crate) fn commit_stem(
&self,
manifest: &mut Manifest,
prepared: PreparedStem,
tracked_paths: &mut HashMap<String, u32>,
committed: &BTreeSet<String>,
) -> Result<Effect, Fail> {
let PreparedStem {
clip_id,
key,
path,
hash,
bytes,
} = prepared;
if manifest.get(&clip_id).is_none() {
return Ok(Effect::Skipped);
}
let old_path = manifest
.get(&clip_id)
.and_then(|e| e.stems.get(&key))
.map(|s| s.path.clone());
self.write_verify(&clip_id, &path, &bytes)?;
self.remove_superseded(
&clip_id,
old_path.as_deref(),
&path,
tracked_paths,
committed,
"stem",
)?;
if let Some(entry) = manifest.entries.get_mut(&clip_id) {
set_manifest_stem(
entry,
&key,
Some(ArtifactState {
path: path.to_owned(),
hash: hash.to_owned(),
}),
);
}
Ok(Effect::ArtifactWritten)
}
/// Relocate a stem with a local rename, falling back to a fetch-and-write
/// when the move is unsafe or the old file has vanished (#141).
///
/// Reconcile downgrades a pure stem path drift to a `MoveStem`, so a retitle
/// renames the raw stem rather than re-rendering a WAV through `convert_wav`
/// or re-fetching an MP3. The in-place rename is taken only when `from` is
/// this slot's alone to give up (no other tracked slot references it — two
/// same-base clips can share a stem path after a partially-failed swap — and
/// no committed write this run already holds it); otherwise the
/// fetch-and-write fallback re-fetches the correct bytes at `to`, so a
/// co-referenced shared stem is never renamed away with mismatched content.
#[allow(clippy::too_many_arguments)]
pub(crate) async fn move_stem(
&self,
client_lock: &ClientLock<'_, C>,
manifest: &mut Manifest,
clip_id: &str,
key: &str,
stem_id: &str,
from: &str,
to: &str,
source_url: &str,
format: StemFormat,
hash: &str,
tracked_paths: &mut HashMap<String, u32>,
committed: &BTreeSet<String>,
) -> Result<Effect, Fail> {
if manifest.get(clip_id).is_none() {
return Ok(Effect::Skipped);
}
// Try the in-place rename shared with `move_artifact`; on a fall-through
// the fetch-and-write fallback re-fetches the correct bytes at `to`, so a
// co-referenced shared stem is never renamed away with mismatched content.
match self.try_relocate(from, to, tracked_paths, committed) {
Relocate::Renamed => {
if let Some(entry) = manifest.entries.get_mut(clip_id) {
set_manifest_stem(
entry,
key,
Some(ArtifactState {
path: to.to_owned(),
hash: hash.to_owned(),
}),
);
}
return Ok(Effect::Renamed);
}
Relocate::DiskFull => {
return Err(disk_fail(clip_id, "disk full: no space left to move stem"));
}
Relocate::Refetch => {}
}
let bytes = self
.fetch_stem_bytes(client_lock, clip_id, stem_id, source_url, format)
.await?;
self.commit_stem(
manifest,
PreparedStem {
clip_id: clip_id.to_owned(),
key: key.to_owned(),
path: to.to_owned(),
hash: hash.to_owned(),
bytes,
},
tracked_paths,
committed,
)
}
/// Resolve a stem's RAW bytes in its native container, never transcoding.
///
/// A `Wav` stem renders the stem clip's lossless WAV through the very same
/// free `convert_wav` + poll flow the main FLAC/WAV audio uses
/// ([`resolve_wav_url`](Self::resolve_wav_url)), keyed on the stem's own
/// `stem_id`, then downloads that WAV. An `Mp3` stem (or a degenerate `Wav`
/// stem with no id to render) downloads its public CDN url directly. Stems
/// are the deliberate exception to the source format: the bytes are returned
/// exactly as delivered and are never re-encoded to FLAC.
pub(crate) async fn fetch_stem_bytes(
&self,
client_lock: &ClientLock<'_, C>,
clip_id: &str,
stem_id: &str,
source_url: &str,
format: StemFormat,
) -> Result<Vec<u8>, Fail> {
let url = match format {
StemFormat::Wav if !stem_id.is_empty() => {
match self.resolve_wav_url(client_lock, stem_id).await? {
Some(url) => url,
None => return Err(transient_fail(clip_id, "stem WAV render was not ready")),
}
}
// Mp3, or a Wav stem with no id to render, downloads the CDN mp3.
_ => source_url.to_owned(),
};
self.fetch_bytes(&url)
.await
.map_err(|err| err.attribute(clip_id))
}
/// Remove one stem file and clear its slot in the owning clip's stem map.
///
/// `remove` is idempotent, so an already-absent stem is not a failure. When
/// the owning entry is already gone (its audio was deleted earlier this run,
/// co-deleting the stem), there is no slot to clear and that is fine; the
/// emptied `.stems` folder is pruned by the end-of-run directory sweep.
pub(crate) fn delete_stem(
&self,
manifest: &mut Manifest,
clip_id: &str,
key: &str,
path: &str,
) -> Result<Effect, Fail> {
self.fs.remove(path).map_err(|err| {
disk_or_permanent(
clip_id,
err.is_out_of_space(),
"disk full: no space left to remove stem",
format!("stem delete failed: {err}"),
)
})?;
if let Some(entry) = manifest.entries.get_mut(clip_id) {
set_manifest_stem(entry, key, None);
}
Ok(Effect::ArtifactDeleted)
}
}