fix(downloads): report completion to the server and show finished downloads as ready - #418
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…nloads as ready
A finished download showed "Queued" with no Play button until the app
restarted, and the server kept every Android download at `ready`. The
Downloads tab only reloaded local metadata when a new download id appeared,
so the server's `ready` won over the stale local row. Android also never sent
the v2 status event that marks a managed download completed; the v2 file
route does not do it.
- Send `downloading` and `completed` status events (PATCH
/api/v2/downloads/{id}) from a per-download WorkManager job that waits for
a network and retries, so offline completions are reported later. Drop a
pending report when the transfer fails or is cancelled.
- Keep a local completion when a registry refresh still reports the same
revision as ready/downloading. Persist the revision locally (Room v12) so
this holds across restarts.
- Reload local metadata in the Downloads tab when a download completes.
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Navigate logical layers of code changes, visualize relationships, and explore their blast radius. 📝 WalkthroughWalkthroughThe change adds download revision persistence and revision-bound status reporting. Download workers report start and completion events through retryable background work. The registry API and repository validate reports and reconcile local completion state. ChangesDownload status reporting
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant DownloadWorker
participant DownloadStatusWorker
participant DownloadsRepository
participant DownloadRegistryV2Api
DownloadWorker->>DownloadStatusWorker: enqueue revision-bound status event
DownloadStatusWorker->>DownloadsRepository: report status under captured authority
DownloadsRepository->>DownloadRegistryV2Api: PATCH status event
DownloadRegistryV2Api-->>DownloadsRepository: return API result
DownloadsRepository-->>DownloadStatusWorker: return report outcome
Suggested reviewers: Merge Risk: 🔵 Low · up to Download completion reporting appears sound. In a narrow case, the locally cached status-event time can be recorded out of order because some timestamps omit their fractional seconds. This should not affect the download or completion status users see. The change is mergeable, preferably after the timestamp format is fixed. Security Architecture ReviewSecurity architecture risk: 🟡 Moderate · up to Owner checks and revision guards limit stale updates, but a completed download can still lose its server completion report after an interruption or prolonged retry. The available client code does not establish how the server authorizes the specific download record being updated. Retained concerns
Security review detailsSecurity Blast Radius
Trust Boundaries and Controls
Resilience and Maintainability Implications
Hardening Proposals
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 26.39% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 72 functions across 17 files. (1 skipped: 1 unsupported.)
✨ Finishing Touches🧪 Generate unit tests (beta)
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A local row saved before the revision was stored matched a server row by file and quality, which cannot tell two revisions of the same target apart (a failed row re-created with the same quality). Require the stored revision to match.
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at
@android-shared/src/androidMain/kotlin/org/siloserver/silo/common/downloads/DownloadWorker.kt:
- Line 443: Format `DownloadStatusEvent` timestamps with a fixed-width UTC
representation containing exactly three fraction digits, rather than using
`Instant.toString()`. Add and reuse a formatter for the event timestamp and the
`completedAt` fallback so both follow the shape expected by
`DownloadsRepository.latestInstant`.
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📒 Files selected for processing (18)
android-shared/schemas/org.siloserver.silo.common.data.db.SiloDatabase/12.jsonandroid-shared/src/androidMain/kotlin/org/siloserver/silo/common/data/db/SiloDatabase.ktandroid-shared/src/androidMain/kotlin/org/siloserver/silo/common/data/db/entity/DownloadEntity.ktandroid-shared/src/androidMain/kotlin/org/siloserver/silo/common/downloads/DownloadEnqueuer.ktandroid-shared/src/androidMain/kotlin/org/siloserver/silo/common/downloads/DownloadSidecarMapping.ktandroid-shared/src/androidMain/kotlin/org/siloserver/silo/common/downloads/DownloadStatusWorker.ktandroid-shared/src/androidMain/kotlin/org/siloserver/silo/common/downloads/DownloadWorker.ktandroid-shared/src/androidUnitTest/kotlin/org/siloserver/silo/common/data/db/SiloDatabaseMigrationTest.ktandroid-shared/src/androidUnitTest/kotlin/org/siloserver/silo/common/downloads/DownloadStatusReportOutcomeTest.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/di/AndroidModule.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/downloads/AppWorkerFactory.ktandroidApp/src/androidMain/kotlin/org/siloserver/silo/android/ui/screens/downloads/DownloadsViewModel.ktshared/src/commonMain/kotlin/org/siloserver/silo/model/download/DownloadModels.ktshared/src/commonMain/kotlin/org/siloserver/silo/network/api/DownloadsApi.ktshared/src/commonMain/kotlin/org/siloserver/silo/network/apiv2/DownloadRegistryV2Api.ktshared/src/commonMain/kotlin/org/siloserver/silo/repository/DownloadsRepository.ktshared/src/commonTest/kotlin/org/siloserver/silo/network/apiv2/DownloadRegistryV2Test.ktshared/src/commonTest/kotlin/org/siloserver/silo/repository/DownloadsRepositoryCompletionTest.kt
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2 participants
Problem
Related issue: #329
Validation tasks: changes #329 C1 (Android phone and tablet).
On Android, a finished download shows "Queued" with no Play button in the Downloads tab. It only shows "Ready" after the app is force-stopped and relaunched. On the server, every Android download stays at
readywith nocompleted_at, while iOS downloads on the same server reachcompleted.There are two causes:
readystatus (labelled "Queued") wins. A relaunch re-reads the local row, which is why a restart looks like a fix.PATCH /api/v2/downloads/{id}, downloads-api §4.3). The worker assumed the server marks completion when the file finishes serving. The legacy route did that; the v2/downloads/{id}/fileroute does not.This is a failure in #329's C1 case (download a title, then play the completed copy).
Approach
DownloadRegistryV2Api.reportStatussends the revision-bound status event.DownloadWorkerreportsdownloadingwhen bytes start andcompletedonce the file is published, with the time captured when the local state changed.A new
DownloadStatusWorkersends each report as a unique WorkManager job per download. The job waits for a network connection and retries with backoff, so a completion reached offline, or cut short by process death, is reported later. The iOS client keeps a pending event per record for the same reason. How the job handles answers:409(revision changed): refresh the registry and drop the event.400/422: retry. The server rejects any event time ahead of its clock, so a phone clock that runs slightly fast lands here.403 profile_verification_required: retain the report until profile PIN verification succeeds.401.A failed or cancelled transfer drops its pending report, including cancellation through the foreground notification.
DownloadsRepository.refresh()keeps a local completion when the server still reports the same revision asready/downloading. A replaced revision or a server failure state still wins. The revision is now stored locally (Room v12, a new nullabledownloads.revisioncolumn), so this holds across restarts. Rows saved before the upgrade have no stored revision, so the server row wins for them in the repository; the Downloads tab still shows them as ready from local state. A report's answer only records the server's acknowledgement (completed_at,status_event_at), and only for the same revision; it never changes the local status.Work queued before the revision input existed resolves its record from the registry under the saved owner and persists the revision in Room. Unversioned partial files restart before adopting that revision. Later attempts can resume bytes saved for the same record and revision.
Acknowledgements compare parsed RFC3339 timestamps at the client’s millisecond precision, so whole seconds, fractional seconds, and numeric offsets retain the latest event.
The Downloads tab reloads local metadata once when a record becomes completed.
Server
readystill reads "Queued". That label is now accurate: after this change it only shows for downloads that haven't finished, such as one waiting for Wi-Fi.No server or API change. Apple already sends these events. Jellyfin compatibility is unaffected.
Validation
Latest verified head:
71a4f5a8, current withmain.34b3ae14. The timestamp correction in69dc7545passesDownloadsRepositoryCompletionTest.Original author validation:
./scripts/test-check-build-supply-chain.shand./scripts/check-build-supply-chain.sh: pass../gradlew testDebugUnitTest: 679 tests inandroidApp, 1 failure. That failure isReflowStyleTest > line height flows from settings, which also fails onmain. No failures inshared,android-shared,androidTvApporlibass-bridge. New tests:DownloadRegistryV2Test.reportStatusPatchesTheRevisionBoundEventDownloadsRepositoryCompletionTest(11 cases)DownloadStatusReportOutcomeTestSiloDatabaseMigrationTest.migration11To12KeepsDownloadsWithAnUnknownRevision./gradlew :android-shared:lintDebug :androidApp:lintDebug :androidTvApp:lintDebug :androidApp:lintVitalRelease :androidTvApp:lintVitalRelease: pass, no new findings../gradlew :androidApp:assembleDebug :androidTvApp:assembleDebug: pass.silo-servermain, on an Android phone emulator:main: finishing a download with the Downloads tab open left the row at "Queued" with no Play button, and the server row stayedreadywith nocompleted_at. I reproduced this before applying the fix.completed, withcompleted_atandstatus_event_atequal to the captured completion time.completedreport within about 5 seconds, and the server row becamecompletedwith the original completion time.preparing, then reported and completed the same way.Risks
12.jsonto v13.readyon the server. Nothing re-sends their completion. The app still shows them as ready from local state.downloadingreport reached the server, the server row staysdownloading. The client has no failed status it can report. Before this change the row stayedready, which hid the failure the same way.Checklist
Note
Report download status to the server and keep finished downloads completed locally
DownloadStatusWorkerthat sends downloading and completed status events to the registry, with retries for transient errors, reconciliation on revision conflicts (HTTP 409), and cancellation helpers tied to download cancellation.DownloadsApi.reportStatusandDownloadRegistryV2Api.reportStatus, which PATCHes a revision-boundDownloadStatusEvent. PATCH requests now participate in the auth-refresh retry flow; DELETE stays single-attempt.DownloadEntitygains a nullablerevisioncolumn with an automatic Room migration from schema 11 to 12, and resumes are restricted to sidecar data for the same revision.DownloadsRepository.refreshno longer downgrades a locally completed record when the server still reports ready/downloading for the same revision; the downloads view model reloads sidecar state when a server-completed record lacks local completion.revisionand remain readable, covered by the migration test in SiloDatabaseMigrationTest.kt.Macroscope summarized 71a4f5a.
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