setOfflineMode/setOnlineMode only mean to flip sync_enabled, but they
called the full-row UpdateDevice with Go zero values — which wrote
DeviceName: "" and NULLed auto_sync/sync_frequency_minutes/
device_metadata on the device row at every offline->online flip. New
targeted SetDeviceSyncEnabled query touches exactly that column; the
real settings update keeps using UpdateDevice.
Caught as part of the H4 helper-census pass (plan §5.4 erasure list).
Found while verifying H1's "app offline-play -> flush -> position lands"
with the emulator path: the flush has been dead code in two independent
ways, invisible because the first break made the second unreachable.
1. ListPendingSyncQueueItems matched `device_id = $1` with a NULL $1
(the processor passes DeviceID{Valid:false} to enumerate all devices;
uuid = NULL matches no rows). The ticker therefore processed nothing,
ever. The WHERE now treats NULL as "every device" (the same
narg::uuid IS NULL idiom the visibility queries use; EXPLAIN'd — seq
scan on a bounded table, idx_sync_queue_status_priority_created
fits). The processor also dropped its fake-pagination loop, which
re-fetched the same first batch forever once the backlog hit the
batch size (no OFFSET in the query).
2. dbItemToSyncQueueItem dropped SyncData — even with a working
enumerator, every flushed item arrived with an empty payload and
failed JSON unmarshal. Dead code harboring silent breakage, exactly
the plan's thesis.
Callers updated for the renamed RowLimit param (queue handler, offline
detector). TestH1_SyncQueueFlush_LandsAndPreservesAudio drives the real
flow: web PUT seeds audio 900s, a pending checkpoint-style queue row
applies percentage 0.8 through SaveProgress, audio survives, queue row
completes.
Also fixes dashboard_test.go's stale BuildSections signature (the
package's test binary has been unbuildable) — user-approved: tests
designed against old shapes are not worth keeping.
Go's new() builtin takes a type and allocates a zero value — it cannot
wrap an expression. All instances of new(someExpression) were compile
errors. Replace each with a local variable assignment and address-of
operator.
Affected files:
- handlers/koreader.go: progress field pointers (Chapter, Page, etc.)
- handlers/kobo.go: pagesRemaining pointer
- handlers/queue.go: uuidPtrToString and timestamptzPtrToString helpers
- router/reader.go: bookmark pageNumber and chapterNumber pointers
- services/media_scanner.go: validation error message pointers
- services/worker.go: StartedAt and CompletedAt timestamps
- sync/offline.go: GetDeviceStatus return pointer
- tests/device_test.go: SyncEnabled and SyncFrequencyMinutes pointers
John O'Keefe
john-okeefe