timothyandClaude Opus 4.8
5c9f04fdec
feat(#253 PR2): optimistic-concurrency on schedule-items aggregate
Wire the frozen #253 ETag/If-Match/412 recipe onto ProgramSchedule /
schedule-items, keeping the PR#258 positional in-place reconcile intact.
Backend:
- ReplaceProgramScheduleItems command gains Option<int> ExpectedVersion;
ReplaceScheduleItemsRequest.ToCommand threads it.
- Handler: standalone CheckVersion Either AFTER validation (so 412 isn't
flattened to 422), unconditional Version++ before save, guarded save via
SaveChangesWithConcurrencyGuard, and 412 propagated without running the
post-save reload/enqueue.
- ProgramScheduleViewModel + Mapper carry Version.
- ScheduleController: GET /items emits ETag; PUT /items parses If-Match
(malformed -> 400), threads ExpectedVersion, re-queries for the new ETag,
and advertises 400/412.
- Sibling config-writers (Add/Delete item, Update schedule) bump Version.
Frontend:
- schedules.ts: getScheduleItemsWithMeta + replaceScheduleItems(ifMatch)
returning ResponseWithMeta.
- SchedulesScreen: etagRef threaded through the #242 dirty-guard (set from
load + every successful save); 412 opens a conflict ConfirmDialog whose
Reload discards the draft and re-runs loadItems.
Tests: handler concurrency suite (stale->412 no mutation + fill-group state
untouched, match/absent success+bump, no-op still bumps, racing save->412);
controller ETag/If-Match/412 cases; SchedulesScreen 412-conflict-dialog test.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-11 18:36:25 +02:00
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