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feat(phaser-assets): expose delivery progress and structured failure details - #196
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The whole pack-preparation budget now runs on one monotonic clock (performance.now) instead of Date.now, so a system clock correction mid-prepare can neither extend nor prematurely exhaust the prepareTimeoutMs budget: - The deadline is computed once per prepare on the monotonic clock and never restarted by a later archive; stagePack's remainder reads the same clock, and the fractional remainder is floored to the decoder's integer deadline contract only after the spent check, so rounding can never mint budget. - No new archive request or decode starts once the monotonic clock says the budget is spent, even when the abort timer's callback is still queued. - A decode that resolves after the budget is spent no longer earns staging handles: the final acceptance gate re-checks the budget and the abort state before handles are acquired. prepareTimeoutMs, requestTimeoutMs and the #191 decode deadline keep their existing responsibilities; user-cancel, dispose and deadline causes stay distinct. Tests drive a manual monotonic clock with gated downloads and a step-driven worker, covering forward and backward wall-clock jumps, one shared budget across dependency archives, download time reducing the decoder budget, zero decode posts after the budget is spent, refusal of success handles on a late decode, and the existing cancel/dispose/files-only regressions.
The pre-request budget gate ran before stagePack invoked the synchronous resolveURL callback, so user code in the resolver could spend the remaining budget while the archive request still started. The gate now sits immediately before the request it guards, after URL resolution, and a regression test advances the fake monotonic clock inside resolveURL: zero archive requests and zero decode posts, deadline failure.
The gated test origin now answers with Connection: close so each phase-gated download uses a fresh connection — a pooled socket reused across gates added runner-dependent transport behavior the test does not measure and intermittently failed the second fetch on CI. The prepare settles through an always-handled wrapper so any transport failure fails the final assertion loudly instead of floating as an unhandled rejection while a gate wait spins.
…details Add delivery.subscribe(listener) as the single observation surface for pack delivery work. Listeners receive prepare and files-delivery read events carrying an operationId (unique per operation within the delivery's lifetime), the operation kind, per-operation sequencing, pack and asset context, the observed phase (planning, downloading, decoding-and-verifying, and exactly one terminal of prepared/completed, failed, cancelled or disposed) and strictly measured progress: network body bytes against the manifest's declared size, verified entry counts and byte totals. Internal hashing/inflate percentages are not observable through the #191 contract and are never fabricated; absent fields mean unknown and per-stage numbers never merge into one synthetic percent. Observation is containment-safe: throwing or rejecting listeners never change results and are never awaited, unsubscribe is idempotent, terminals fire exactly once per operation, and late events from superseded operations are dropped. Files-only prepare stays a light two-event operation (prepared means staging, never images loaded), and staged-entry local reads emit nothing, keeping origin downloads and local reads distinguishable. PhaserPackDeliveryError gains an additive optional details field (stage, operationId, pack/asset identity, httpStatus, decoderStatus/decoderCode, expectedBytes/receivedBytes) captured at the failing execution point; codes, messages and existing constructor calls are unchanged, and no URL or response data ever enters events or details. readCappedDeliveryBody accepts an optional onBodyBytes observation hook. The kit example surfaces the observed phases and numbers beside the loader's own texture progress, keeps stale operation events from overwriting new selections, unsubscribes on scene shutdown (distinct from an explicit cancel), and formats failures from the structured details; the browser acceptance asserts staging observation is distinct from texture readiness.
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🧭 Changeset detectedMerging this PR will release the following updates: @mpgd/phaser-assets (npm) — minor version bumpMinor changes
Patch changes
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📝 WalkthroughWalkthroughChangesDelivery observability and deadline enforcement
Priority: ⬇️ Low Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant PhaserPackDelivery
participant stagePack
participant fetchDeliveryBytes
participant ArchiveWorker
PhaserPackDelivery->>stagePack: start archive staging
stagePack->>fetchDeliveryBytes: fetch archive and report body bytes
fetchDeliveryBytes-->>stagePack: archive bytes and HTTP status
stagePack->>ArchiveWorker: decode with remaining deadline
ArchiveWorker-->>stagePack: entries and decoder status
stagePack-->>PhaserPackDelivery: progress event or structured terminal result
Merge Risk: 🔵 Low · up to The delivery feature remains usable, but its published diagnostics and examples can mislead consumers. These bounded issues should be corrected before release. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 20.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 4 files. (4 skipped: 4 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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Actionable comments posted: 4
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Inline comments:
In `@examples/asset-packs/src/main.ts`:
- Line 391: Update the error display assignments in the PhaserPackDeliveryError
handling paths to format model.error using only error.code and
detailSummary(error.details); remove the error.message suffix from each
occurrence while preserving the existing code and details formatting.
In `@packages/phaser-assets/README.md`:
- Line 334: Update the README sentence containing “#191” to name the bounded
archive decoder/module-worker contract descriptively, such as “the archive
worker contract,” so published documentation does not rely on an internal issue
reference.
In `@packages/phaser-assets/src/delivery.ts`:
- Around line 1600-1605: Update the prepare failure handling around
classifyPrepareFailure so withDetails adds operation metadata without
overwriting the failing stage’s recorded packId or revision. Preserve existing
classified details when present, falling back to the requested packId and
requestedRevision only when those fields are absent.
- Around line 1167-1190: Update the decoding error handling around the archive
worker catch so terminal ZipDecodeError statuses remain accurate: map the
unsupported failure to decoderStatus 'unsupported' instead of 'error', and
include decoderStatus 'worker-error' in the context for that failure. Preserve
the existing deadline and integrity mappings.
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.sampo/changesets/delivery-monotonic-deadline.md.sampo/changesets/delivery-progress-details.mddocs/ASSET_PACK_DELIVERY.mdexamples/asset-packs/src/main.tsexamples/asset-packs/test/browser.mjspackages/phaser-assets/README.mdpackages/phaser-assets/src/delivery.tspackages/phaser-assets/test/delivery.test.ts
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- The prepare boundary no longer overwrites pack identity the failing
site recorded: a dependency archive failure keeps naming that
dependency in details (regression covered), while correlation fields
still merge in.
- The unsupported worker-environment failure maps to its documented
decoderStatus ('unsupported', not 'error'), and a worker-error decode
failure records decoderStatus 'worker-error'; core digest failures
still leave decoderStatus absent (unknown), per the
absent-means-unknown contract.
- The kit sample renders delivery failures from the stable fields only
(code plus structured details), never message text, and the browser
acceptance matches that display.
- Published docs describe the bounded ZIP decoder instead of the opaque
internal PR number.
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Summary
Games can now show the current preparation stage and failure cause without parsing
error.messageor polling internal state. Stacked on #195 (monotonic deadline) — the diff reduces to this feature once that merges to main.Observation contract —
delivery.subscribe(listener)is the single observation surface (no duplicate onProgress API, no event bus, no state library):operationId(unique per operation within the delivery's lifetime — a correlation id, not an idempotency key),kind(prepare|file-read), per-operationsequence, pack/revision (+assetKey/rolefor reads), the observedphase, and strictly measured progress.planning,downloading,decoding-and-verifying, then exactly one terminal ofprepared/completed,failed,cancelled,disposed. No fabricated hashing/inflate percentages; the feat(phaser-assets): add bounded ZIP pack decoding #191 worker protocol is untouched.preparedmeans ZIP staging completed — never that images loaded. Files-only prepare is a light two-event operation; staged-entry (local) reads emit nothing, keeping origin downloads distinguishable from local reads for future cache support.Structured failures —
PhaserPackDeliveryErrorkeeps its codes, messages and two-argument constructor; an additive optionaldetailsfield capturesstage,operationId, pack/asset identity,httpStatus,decoderStatus/decoderCode,expectedBytes/receivedBytesat the failing execution point (never re-parsed from strings). No URLs (queries may carry credentials), response objects or nested errors ever enter events or details — covered by a test that fails a request whose URL carries?token=….readCappedDeliveryBodygains an optionalonBodyByteshook.Kit example — the loading line now shows the observed delivery stage and measured numbers beside the loader's own texture progress (two distinct stages), failures render from the structured details, stale operationIds cannot overwrite a new selection, and scene shutdown unsubscribes the observer — distinct from the explicit cancel control.
Verification
observed.phase === 'prepared',observed.packIdmatches, terminal empty, and the last measured progress isentries 2 / 2— asserted alongside the loader's texture readiness, pinning the two stages as distinct. Full suite passes (one known load-dependent Playwright flake needed a rerun).pnpm check(incl. validate:public),pnpm build:packages, off-kit packed-tarball consumption (runtime + generated.d.tstypes) all pass; localocr reviewreports 0 findings.Changeset
.sampo/changesets/delivery-progress-details.md—@mpgd/phaser-assetsminor.Excluded by design: worker protocol changes, analytics, auto-retry, ZIP→files fallback, global state stores, caches, new codecs. Release PR #189 untouched.
Summary by CodeRabbit
New Features
Bug Fixes
Documentation