Adds the shared optimistic-concurrency contract so a stale second tab can no longer
silently overwrite a fresher edit. PR1 lands the infra + the Block reference aggregate;
PRs 2–4 fan the same recipe across the other 8 roots (design: #253#issuecomment-8472).
Contract
- `IVersionedAggregate` (`int Version`) on all 9 replace-all roots (ProgramSchedule,
Block, Template, DecoTemplate, Playlist, Collection, Playout, MultiCollection,
RerunCollection), EF-mapped `.IsConcurrencyToken()`; one dual-provider migration
`AddAggregateVersions` (nullable:false, default 0).
- Strong `ETag` of `Version` on the aggregate GET; `If-Match` on the PUT; mismatch →
412 (distinct from the §3a 409 build-lock guard). Successful PUT returns the new ETag.
- `PreconditionFailedError : BaseError` → 412 in `ApiResults.ToErrorResult`;
`ConcurrencyHeaders.ParseIfMatch/SetETag`; malformed If-Match → 400; `*`/absent =
Phase-1 force-write.
Block reference wiring
- Handler: standalone `Either` via `CheckVersion` AFTER validation (never through
`Apply`, which Join()-flattens the subtype to 422), unconditional `Version++`,
`SaveChangesWithConcurrencyGuard` backstop (DbUpdateConcurrencyException → 412).
- `BlockViewModel.Version` (header-only, not echoed in the body); controller sets the
ETag on GET items and on the successful PUT.
- SPA: `client.requestWithMeta` seam; `blocks.getBlockItemsWithMeta` + `replaceBlock`
If-Match/ETag round-trip; `BlockEditor` holds the ETag, sends If-Match, and on 412
opens a blocking "changed elsewhere — reload" dialog.
Tests
- Handler contract tests: stale-If-Match → 412 (no mutation), matching/absent → success
+ bump, no-op save still bumps, and a two-context racing save → 412; proven
non-vacuous (drop `.IsConcurrencyToken()` → the race test fails).
- Controller tests: malformed If-Match → 400, If-Match threaded to the command, ETag on
GET/PUT, 412 passthrough. SPA: requestWithMeta ETag, replaceBlock If-Match, 412 dialog.
Docs: api-conventions §7a, spa-conventions §4a, domain-model glossary, decisions log.
Refs #253
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add a ChicoryTV SPA Playlist editor at /app/playlists over the new
playlist-CRUD REST API: a group tree (add/rename/delete groups,
add/delete playlists) plus a playlist item editor (per-item Collection
Type over the 12 playlist item types, type-conditional playback order,
count, Play All, Show In EPG, reorder/copy/remove) and a draft playout
preview. System groups and playlists are read-only, mirroring the Blazor
Playlists.razor / PlaylistEditor.razor pages.
- web/src/api/playlists.ts: group/playlist/item CRUD + preview client fns
- web/src/screens/PlaylistsScreen.tsx: group tree + editor + preview
- App.tsx: route, ScreenId, nav, dispatch wiring
- docs: blazor-route-parity + domain-model updated to SPA DONE
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add two React SPA editor screens over the existing REST APIs, retiring the
last two "Classic UI only" media-collection editors.
MultiCollectionsScreen (/app/multi-collections, #151): list + in-screen
editor. Name + a list of manual/smart collection items, each with a
Schedule-As-Group toggle; two add-pickers dedupe already-present entries.
Items save with playbackOrder "Chronological" (matches the Blazor editor).
RerunCollectionsScreen (/app/rerun-collections, #152): list + in-screen
editor. Name, a Collection Type select restricted to the REST-supported
selection set (IsSupportedSelectionType) — Collection/MultiCollection/
SmartCollection plus the media-item types TelevisionShow/TelevisionSeason/
Artist/Movie/Episode/MusicVideo/OtherVideo/Song/Image/RemoteStream (every
one maps to a working LibraryBrowseMediaType picker); Playlist is excluded.
A conditional single-selection picker per type, and First/Rerun playback
order selects with the Blazor type-conditional option sets (reset on type
change).
Both screens toggle list<->editor via local state (mirroring
CollectionsScreen), no sub-path routing. Wired into App.tsx (imports,
ScreenId, routes, mediaNavIds, ScreenContent). Added messageFrom*Error
helpers + type re-export to the api clients.
Tests: multiCollections/rerunCollections api-client param+body tests,
both screen tests (list render, create body, rerun type-switch swaps
picker + order options, delete), and an App.tsx nav-registration test.
Docs: blazor-route-parity.md (rows moved to SPA DONE), domain-model.md.
web verify gate: 353 tests pass, eslint clean, tsc -b + vite build clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
timothy
