fuelboard/BACKLOG.md

FuelBoard Backlog

FuelBoard — UK-wide petrol-station price widget + app. GitHub mirror (aptonline/fuelboard-data, 2×/day 10:00+16:00) holds the full-UK dump (~8,022 stations, all prices); app fetches it once per 12 h and filters/sorts on-device, with a bundled snapshot as the no-network last resort. LAN relay is dev-only (hidden fuelboard.relayFallback flag).

Priority guide: P0 = next build, P1 = soon, P2 = later, P3 = maybe/idea. Status: TODO / IN PROGRESS / DONE / BLOCKED.

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P1 — Soon

• Move relay + mirror off the Mac mini (DONE 2026-08-16) — dedicated Debian 13 LXC on Proxmox via community-scripts/ProxmoxVE ct/debian.sh (CT 111, hostname fuelboard-relay, 1 core/512 MB/2 GB, static IP 192.168.1.113, plain LXC — NO Docker layer). Scope: relay AND mirror both moved (full Mac independence; relays bind loopback only, GitHub is the only public surface). What landed: Python 3.13.5 (trixie) boots both relays (relay 8788 demo/CSV + relay-api 8789 source: api, 8,024 stations, ~2 min first sync, 0 failures); source at /root/workspace/fuelboard-{relay,relay-api} (venvs + pip, .env chmod 600); deploy key fuelboard_deploy + github-fuelboard-data ssh config + fuelboard-data clone at /root/workspace/fuelboard-data (origin = ssh alias, green + synced); mirror_push.py → /root/scripts/mirror_push.py (RELAY line already 127.0.0.1:8789); systemd fuelboard-relay.service + fuelboard-relay-api.service (Restart=always, --host 127.0.0.1) + fuelboard-mirror.service (oneshot) + .timer (10:00 + 16:00, Persistent, armed — next Mon 10:00); first live push VERIFIED from outside (commit 735a292, latest.json data_updated 16:50:53Z); Mac launchd com.apt.fuelboard-{relay,relay-api,mirror} unloaded + plists parked in ~/Library/LaunchAgents/fuelboard-migrated-to-ct/; editor 8790 + IPA 8765 stay on the Mac; price watchdog relay_price_watchdog.py now fetches via SSH (~/.ssh/fuelboard_ct → /root/scripts/watchdog_fetch.py). Logs via journalctl -u fuelboard-* on the CT; SSH into CT: ssh -i ~/.ssh/fuelboard_ct root@192.168.1.113. Open: rootfs is 2 GB (1.1 GB free) — mirror retention ~940 MB will get tight; rootfs grown to 8 GB on pve 2026-08-16 (5.9 GB free).

• Siri: "Cheapest [fuel] near me" — AppShortcutsProvider + CheapestFuelIntent (App Intents, iOS 16+), dialog + price-card snippet, cached full-UK dump first with freshness label ("as of 6am"), last-known-location fallback. Constraint: fresh-data path needs a reachable source off-LAN — cached answers work anywhere the app has previously fetched (the GitHub mirror serves this now). DONE — radius-scoped lookup 037c241 (real-data regression: GULF HISTON 100.9p 132 mi away), per-fuel literal-word shortcuts e55078c, names = app words a3b6f37, plus Directions-to-cheapest caadf18 + spoken hand-off aed99e3.

• Siri: "Closest [fuel] station" — same plumbing as cheapest, sort by distance instead of price. Free second phrase in the same AppShortcutsProvider.

• Favourites Trends graph — price history chart for starred stations. Swift Charts (iOS 26 target) line chart in the Favourites tab; one series per favourite, fuel-scoped (station, fuel) pairs map 1:1 to the archive. Default = absolute price lines; toggle "vs cheapest favourite" re-baselines to 0 as signed pence (mirrors the Cheapest/Closest delta pattern users already know). Reuse the capsule fuel picker; range control 7/30/90 days; respects the price-display toggle; honest empty-state copy in Localizable.strings ("Prices are recorded from each refresh — check back in a few days"). No widget in v1 (one-kind rule). Depends on the P0 archive. DONE 2026-08-15, merged to main 2026-08-16: Shared/FuelHistory.swift (FuelHistoryStore: day math, slim day decode w/ shared band, series + deltaSeries, app-group favourites-only cache, parallel per-day fetches) + FuelBoard/TrendsView.swift (chart, fuel capsule, 7/30/90, Price/vs cheapest, per-station legend, empty/loading/retry states) + toolbar entry in FavouritesView + strings. 83 tests incl. URL regression (appendingPathComponent — URL(string:relativeTo:) dropped /main, all fetches 404'd). Sim-verified: favourites rows + TOP/deltas; sheet controls + honest empty state w/ live first- snapshot date. Pending: lines render once ≥2 snapshots (archive warming daily, ~Aug 17).

P2 — Later

• Shortcuts: station price lookup — StationEntity + EntityQuery so Shortcuts/Siri pick a station by name; ReturnsValue<Double> enables user automations ("get cheapest diesel → notify").

• Siri: favourite station price — "How much is my favourite unleaded?" FavouriteFuelPriceIntent: TOP favourite per fuel (first in the manual Favourites order — SiriCheapestLookup.topFavourite, refresh-vs-dump with offline cached-snapshot fallback); no location required (distance shown only when the saved fix exists). DirectionsToFavouriteFuelIntent (Maps hand-off, station announced first) stays in code but carries no voice phrases — every favourite price card has the interactive Directions button (6d7254e), and the voice slots went to Directions-to-Cheapest (8a4c472). DONE — favourites already carried station snapshots, so no StationEntity dependency.

• Siri: on-screen awareness (View Annotations + StationEntity) — iOS 26/27 Siri prefers the visible screen over the App Shortcut when the app is frontmost; without view annotations it answers from the rendered screen (unstructured "screenshot" parse) — visible tab/sort/radius, not the full dataset or the intent's logic. Fix: StationEntity (shared with the station lookup P2 above) + .appEntityIdentifier on station rows (collection annotation on the List) + NSUserActivity on the station detail/map + App Schema conformance (optional IndexedEntity for Spotlight semantic search). Verify annotations with AppIntentsTesting (P3). Off-screen/locked requests already route to CheapestFuelIntent correctly; this closes the frontmost gap. WWDC26: "Build intelligent Siri experiences with App Schemas"

  • "Explore advanced App Intents features".

• Lock screen widgets — new FuelPriceLockScreen kind (fuel-only config intent, reuses FuelPriceTimelineProvider): accessoryRectangular (cheapest station + price + distance), accessoryCircular (price ring), accessoryInline ("⛽ 139.9p"). Provider + containerBackground already exist; must branch the view for accessory families (current else renders stationList). Bonus: StandBy mode. ~1 session.

• CarPlay — widgets render but can't launch Maps; consider a proper CarPlay scene (CPListTemplate) for navigation deep-links.

• Alert region tuning — make alert trigger radius + dedup window user-configurable (currently fixed 300 m trigger / 1 per station per hour).

• Price-drop alerts: threshold control + Check now — keep the current cache-first / 12 h refresh policy, but add a per-alert sensitivity control for favourite price-drop alerts instead of a fetch-frequency slider. Scope: Minimum change picker (e.g. 0.5p / 1.0p / 2.0p), plus a Check now action in the Alerts tab that forces a fetch and immediately re-evaluates the cheapest-favourite alert. Copy should set expectation honestly: standard mode checks when FuelBoard refreshes prices (up to twice daily).

• Price-drop alerts: optional frequent-check mode — if the app ever relaxes the current "twice daily max" data policy, expose this as a clearly separate mode rather than a freeform frequency slider. Example framing: Standard (current behaviour) vs Frequent (best-effort extra checks), with conservative caps (e.g. every 4–6 h, not hourly) and copy that does not promise exact timing under iOS background scheduling.

• Pull-to-refresh spinner state — surface refresh in-flight state (currently refreshable fires but no visible progress in the row list).

• Offline first-run — bundled REAL 8,022-station dump (FuelBoardDump, refreshed by scripts/refresh_bundled_dump.sh) is the no-network last resort in the live chain (P0, 2026-08-16); first launch demos the full dataset offline.

• Localization — UK English only today; audit string catalog for l10n.

• Dark mode polish — verify brand logos (white-circle clips) and RAG dot contrast under dark appearance on-device.

• Trends: national average overlay + per-day min/max — the full dump is already held, so the UK/regional average line is computable locally; archive can store per-day min/max so the chart shows intraday spikes, not just the daily point.

P3 — Ideas / Research

• Siri: create fuel alert — voice-create an alert for a station. Deferred: alert semantics (cheapest-within-radius + hourly dedup) are hard to express in a dialog; needs the alert engine surfaced as an intent.

• App Intents testing — AppIntentsTesting (iOS 27) for intent coverage instead of XCUITest when the Siri features land.

• Fuel-price prediction — "price tends up/down" arrow derived from the price-history archive (P0). Cheap once the archive + Trends graph exist; keep a separate phase. Backlog ancestry: this was the original "relay could keep a rolling archive" idea — the archive is now P0 and the Trends graph (P1) is its visible half.

• Foresight Live Activity (heading-aware next station) — investigate a driving-time surface that predicts the likely next station ahead of the user from cached data only (no extra source-data refresh on motion). Best v1 shape: Live Activity option, not widget-first, because widget space/refresh budgets are tight and the lock-screen/CarPlay compact slot better matches the use case. Viable MVP: infer heading from recent motion/course, keep only stations in a forward cone, score candidates by forward distance + lateral offset, and show the next-ahead station with all three fuel prices or a compact rotating/focused fuel treatment if space allows. Key caveat: heading is not full route awareness, so avoid overpromising "the next station you will reach" on motorways/opposite carriageways; frame as "next ahead" / "likely next stop" unless route-quality heuristics improve. Must include hysteresis/speed thresholds to avoid flapping, and should be tested specifically against compact Live Activity/CarPlay layouts where space is extremely limited.

• Widget sparkline — medium-widget mini sparkline of a favourite's 30-day trend, after the Trends UI lands (one-kind rule preserved).

• Price alerts for a specific station — notify when a starred station's price drops below a user threshold.

• Price-drop alerts: mode = Cheapest favourite / All favourites — keep Cheapest favourite as the default low-noise mode, but explore an optional All favourites mode for one fuel. Guardrails if built: threshold required, per-station dedupe based on last-alerted price (not just time), and combine multiple drops from one refresh into a single summary notification rather than one alert per station.

• Share sheet — share "Cheapest Unleaded near me" as text/image card.

• Watch app v1 — favourites + Check now — small Apple Watch companion, not a phone-app clone. Favourites-first home screen: fuel picker, Cheapest favourite summary card, top few favourites for that fuel, last-updated time, and a prominent Check now action that forces a refresh + re-evaluates favourite prices. Keep the watch UX pull-based and glanceable; avoid implying high-frequency background refresh. Shared-store architecture preferred over a second watch-only data model.

• Watch complications / Smart Stack — complication/widget surfaces for the same watch concept: show the cheapest favourite price, fuel, and short station name at a glance. Keep copy minimal and honest about freshness.

• Watch app v2 — favourite detail + handoff — tap a favourite row for a detail screen (station, brand, price, last updated) with actions like Directions and Open on iPhone. Reuse existing maps handoff patterns where possible instead of inventing watch-only navigation logic.

• App Clip — 10 MB budget for "find cheapest fuel nearby" without install.

• Widget picker: dual-unit distance labels — the Edit-Widget Distance row label is cached by the system at sheet-render time and only re-resolves on picker interaction, so "mirror the app unit" goes stale. Fix: label options with both units ("5 miles (8 km)") so nothing can go stale; widget rows keep mirroring the live unit.

• Localizable.strings: normalize keys to match copy — today 8 onboarding keys diverge from their values (key = old source literal, value = tightened copy, e.g. "…updated twice a day" key vs "…updated daily" value). Option to rename keys so key == value everywhere. Requires sweeping every Swift occurrence of the old literal (Text/NSLocalizedString) AND updating key + value together in one commit + rebuild — renaming the file entry alone silently reverts copy to the Swift literal at next build. Not recommended: keys are invisible anchors; value edits already change copy without code changes, and normalization reintroduces divergence on the next value edit.

Done (recent)

• GitHub price-history mirror + LIVE provider chain (P0, DONE 2026-08-16) — push side (relay → public aptonline/fuelboard-data, daily 10:00 launchd, SSH deploy key, 180-day retention) + history read side (Trends, P1) + live chain (feature/p0-live-chain): MirrorFuelProvider fetches CURRENT prices from raw.githubusercontent (latest.json → history/.json, app-group day-cache) → GitHub FIRST everywhere (alert checks + widget too — the relay is unreachable from any consumer phone and attempting it would fire the Local Network prompt); LAN relay joins ONLY behind the hidden dev flag fuelboard.relayFallback (Settings → Debug, off by default); bundled REAL dump (FuelBoardDump dataset, refreshed by scripts/refresh_bundled_dump.sh) is the app's no-network last resort. FuelBeacon fire-and-forget X-Client app ping fires only with the dev flag on. Local Network permission removed from onboarding entirely — data page is informational, replay on cellular can no longer hang. 95 tests.
• Switch dataset to govuk API data — official Fuel Finder OAuth API via relay-api :8789 (source: api, ~8,012 stations); app baseURL → :8789; credentials live in relay .env only, never in the IPA
• Widget configuration — per-widget fuel/sort/distance via WidgetConfigurationIntent (AppIntentConfiguration), distance options as WidgetDistance AppEntity (26e724f); small widget gained Favourites (d0bd4e7) + .systemMedium (b94f769)
• Unit test target for the app — FuelBoardShared XCTest target, 37 tests (title sanitizer, decode price guard, RAG thresholds, cheapest/closest baseline, miles↔km)
• Backlog hygiene — implemented items marked DONE, obsolete pruned
• Sync retry with exponential backoff — relay-api retries failed syncs 15s→15min cap; /health exposes retry state (6a58275)
• England-wide full-UK dump, on-device filtering (relay 142061b, app cf9765b)
• Cache-first, 12 h gate, pull-to-refresh only
• Distance filter 5/10/15 miles, local-only changes (no re-fetch)
• Closest mode = whole country, distance picker disabled
• Delta/TOP baseline = cheapest-within-radius in both modes
• Three-layer price sanitisation (relay band 50–500p / app decode guard / title-case)
• Title-case station names (chunk-aware sanitizer)
• Native large-title navigation (Mail-style collapse) — 313fe84
• E10/E5 bracket labels in picker + descriptions — 05f3ef0
• Gitea remotes created + pushed (apt/fuelboard, apt/fuelboard-relay)
• Brand logos: proper 2x/3x assets, 75% smaller (315 KB → 79 KB)
• Security audit (see SECURITY.md)
• App Store approval gotcha review (see APPSTORE.md)