The Live Slideshow already covers the core of #202 (fullscreen kiosk,
live-appending new uploads, timing/transitions/watermark, per-event
opt-in via the share link). This adds the two customization dimensions
the reporter also asked for:
- **Play order** (show_order): 'chronological' (upload order, default) or
'random' — the client shuffles the initial set (Fisher-Yates) so
live-appended uploads keep working.
- **Category filter** (show_category_id): restrict the slideshow to a
single photo category (NULL = all photos, default). Enforced
server-side on the slideshow /photos access and mirrored in the
/session + /state photo_count, so the kiosk viewer can't widen the set.
Per-event enable/disable (default off) is unchanged — it's the existing
'Generate/Disable slideshow link' flow (no token = no slideshow).
- Migration 158: show_order (default 'chronological') + show_category_id.
- Admin: Play-order dropdown + category picker in the Live Slideshow card
(picker hidden for events without categories); EN + DE i18n.
- Verified: migration (SQLite + PG); live API (category filter → 3/2/5
photos + matching count; order propagates) and the running kiosk
requests exactly the filtered set; tsc clean, 136 backend tests pass.
PR #649 takes migration 137 (add_whatsapp_template_language). Renumber the
slideshow migrations to slot in after it:
- 137_add_slideshow_share.js -> 138_add_slideshow_share.js
- 138_add_slideshow_styling.js -> 139_add_slideshow_styling.js
and update the slideshow migration-number references in comments/types. No
content change — both are additive + addColumnIfNotExists-guarded, so re-running
under the new filename on an already-migrated DB is a safe no-op.
The watermark look (logo / position / opacity / style) was configurable in three
places — the global Settings tab, the per-event-type preset, and the per-event
card. Consolidate it to ONE: the global Settings -> Slideshow tab. Per-event and
per-event-type now carry only the watermark MODE (inherit / on / off) — the
override structure — and render with the global look.
- New global "Size (% of screen)" control (slideshow_watermark_size, vmin-based)
so the logo can be scaled; resolved server-side into the watermark payload and
applied to the kiosk <img>.
- Backend slideshowSettings resolves the whole look from app_settings always;
per-event show_watermark only toggles enabled. adminEvents PATCH + type-preset
seeding no longer accept/seed per-event look fields; unused enums removed.
- Frontend SlideshowStyle drops the look fields (mode only); SlideshowStyleFields
watermark section is a single mode select with a "configured under Settings"
hint; SlideshowSettingsCard + Event type cleaned up.
- en/de: watermarkSizeLabel + watermarkModeHint.
(events.show_watermark_{source,position,opacity,style} columns from migration
138 are left in place but inert — the look is global now.)
Log the failing request (status + body) to the console and show the backend
error message in the toast instead of a generic "Error", so failures are
diagnosable without server log access.
- per-event Live Slideshow card on the event detail page: generate/copy/
regenerate/disable the share link + live style (transition, timing, color
filter, watermark).
- shared SlideshowStyleFields, reused by the per-event card and the per-event-
type preset section in the Edit Event Type modal.
- global watermark default card on the Event Types page (Settings -> slideshow).
- WatermarkSourcePicker: visible logo tiles with previews (light logo / dark-mode
logo / favicon / event logo) instead of a blind dropdown.
- watermark mode tri-state (inherit/on/off) + white-vs-original style.
- supporting service methods + Event/EventType types.
Paul Nothaft