feat: refuel stop planner for liquid fuels - #153
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Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe pull request adds a fuel-stop planner and connects its recommendations to the route panel and map. It also changes map route-layer ordering, moves scraper scheduling to Node-specific instrumentation, and updates theme state handling. ChangesRefuelling planner
Route layer placement
Node scraper scheduler
Theme state
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Feature Merge Risk: 🔵 Low · up to The fuel-stop planner and related map, theme, and scheduler changes can be merged. One small localization concern may still be open: planner unit labels (km, min, L) might be hardcoded rather than translated. A fix was reported but not confirmed. Check it during follow-up. Security Architecture ReviewSecurity architecture risk: 🟡 Moderate · up to The new planner can recommend a trip that goes below the chosen minimum fuel reserve when the starting level is already at or below that reserve. No new security attack path was established, but that exception weakens a stated planning safeguard. Scraper deployment ownership also remains unverified. Retained concerns
Security review detailsSecurity Blast Radius
Trust Boundaries and Controls
Resilience and Maintainability Implications
Hardening Proposals
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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Review comments at @src/components/search/refuel-planner.tsx:
- Line 185: In the stop-detail rendering, replace the hardcoded “km” and “min”
labels with t("route.distance") and t("route.duration"), and replace the “L”
label on the nearby line with the existing localized liters label via t().
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src/components/home-client.tsxsrc/components/map/map-view.tsxsrc/components/map/route-layer.tsxsrc/components/search/refuel-planner.test.tsxsrc/components/search/refuel-planner.tsxsrc/components/search/search-panel.tsxsrc/instrumentation-node.tssrc/instrumentation.tssrc/lib/i18n.tsxsrc/lib/refuel-planner.test.tssrc/lib/refuel-planner.tssrc/lib/theme.tsxsrc/lib/vehicle-profile.test.tssrc/lib/vehicle-profile.tssrc/scrapers/cli.test.tssrc/scrapers/cli.tssrc/scrapers/data/index.tssrc/scrapers/germany-ev-source.tssrc/scrapers/reve.tssrc/scrapers/spain-ev-source.tssrc/scrapers/static.test.ts
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GeiserX
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Thanks for this. The planner is a real feature, and the three side fixes are good. The instrumentation split is a clean move: the scheduler is byte-identical apart from the wrapper. We reviewed the PR with reproducible checks against a scratch copy of the branch. Every finding below was reproduced independently at least twice. Two of them need fixing before merge.
Blocking
1. The first leg can drop below the reserve the user set (src/lib/refuel-planner.ts:103)
firstLegFloor = Math.min(reservePct, startPct / 2) relaxes the floor whenever the start is below twice the reserve, not only when the car starts at or below it. The DP then picks a cheaper stop that arrives under the reserve, even when a stop that respects it exists. That breaks the header's promise that the tank never drops below reservePct.
With the defaults (reserve 10 %, arrival 20 %), a 50 L tank at 10 L/100 km and start 15 %, give it two stations: OK at km 25 for 1.60, which arrives at exactly 10 %, and BELOW at km 35 for 1.50. The planner picks BELOW and arrives at 8 %. With only OK present, the plan is feasible and ends at 10 %. Start 30 % with reserve 20 % shows the same thing: it arrives at 16 %.
Relax only when the start is at or below the reserve: startPct > reservePct ? reservePct : startPct / 2. That keeps your existing tests for a 5 % and a 10 % start. Please add a regression test for a 15 % start with a 10 % reserve.
2. The default value of time ignores the display currency (src/components/search/refuel-planner.tsx:45)
timeValue starts at 15 in whatever currency is displayed. In HUF that is about €0.04/h, so detours are free. Take a near station at 1 min and 632 Ft/L and a far one at 25 min and 561 Ft/L: the plan adds the 25-minute detour. RSD, ISK, CZK and the other small-unit currencies behave the same way.
Keep the value in EUR and convert it with useCurrency().convert for display and for the planner input, re-converting when the currency changes. Scaling the default by the current rate also works.
Please fix here, since this PR introduces them
3. Dark-mode users now get a light map first (src/lib/theme.tsx:45)
During hydration useSyncExternalStore returns the server snapshot, light. react-map-gl creates the map in a mount-only effect with that first style, then swaps to dark. Every page load for a stored-dark or system-dark user flashes the light basemap and loads two styles. Keep the hydration fix for the toggle, but give MapView the real theme at mount, for example from document.documentElement.classList on the client.
4. Clicking a numbered stop marker flies back to the previously selected station (src/components/map/map-view.tsx:370)
The marker calls onSelectStation without updating selectedStationCoordsRef. When the leg route resolves, handleRoute flies to the previous stop's coordinates. Passing the coordinates, as the planner row does with onFlyTo(stop.coordinates, stop.id), fixes it.
5. Recommended stops outside the map filters can't be opened (src/components/search/refuel-planner.tsx:57)
The planner ignores maxDetour (default 5 min) and maxPrice, so it can recommend a 12-minute detour. That station is filtered out of the layer and the list, so selecting it shows no dot, no row and no popup. Either apply the same filters to the candidates, or resolve the selection against the unfiltered corridor set.
Worth fixing, fine as a follow-up if you prefer
- Pruning can drop the only reachable station (
refuel-planner.ts:85). Above 200 candidates, each bucket keeps its cheapest and its least-detour station without checking reachability. At a low start, the one station in range can be dropped and the trip reported infeasible. Keep every station inside the first-leg range as well. The DP takes about 21 ms at 200 candidates, so raising the cap is also cheap. - Out-of-range input is saved silently (
refuel-planner.tsx:86). Typing 800 L commits 8, then 80, then rejects 800. The field shows 800 while the plan uses and saves 80. Commit on blur, or mark the field invalid and suppress the plan. - The planner resets whenever the corridor or route recalculates (
search-panel.tsx:786). The station list empties while it refetches, the planner unmounts, and the user's start, arrival, reserve and time settings are lost. Lift them intoSearchPanelor persist them like the vehicle profile. - The infeasible message points at the wrong cause (
refuel-planner.ts:210,refuel-planner.tsx:163). With no usable candidates (detours failed, exchange rates missing) or an unreachable arrival target, it says "widen the corridor". A separate reason for each case would tell the user what to change.
Rebase
main has since added Cyprus and Taiwan to the scheduler, so src/instrumentation.ts will conflict. Please carry CY, TW, EV_CY and EV_TW (intervals, imports and factories) into instrumentation-node.ts when you rebase.
CI is green on your latest commit. Happy to look again as soon as 1 and 2 are in.
An early return on NEXT_RUNTIME doesn't strip imports from the Edge build; an import inside if (NEXT_RUNTIME === "nodejs") does. Removes node:crypto/node:path Edge warnings.
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Thanks for the thorough review. Everything is addressed, one commit per item, and rebased onto current Blocking
Introduced here
Follow-ups
Rebase: CY, TW, EV_CY and EV_TW are in All 704 tests pass, and tsc and lint are clean. Also fixed the same fly-back for plain station dots (it's on |
The scheduler now lives in src/instrumentation-node.ts behind a Node-only wrapper, so the docs site, .env.example and a test comment that named src/instrumentation.ts as its home were pointing at an 8-line wrapper.
…didates Pruning kept the cheapest, closest and earliest station of each route bucket, so a bucket could lose the only station a full tank can leave it from, turning a feasible trip infeasible or much dearer. Keep the furthest-reaching one too and size the buckets so four per bucket stays within the cap.
Starting at or below the reserve let the first leg use half the start level, while starting just above it held the reserve, so raising the start from 10 % to 11 % could turn a plan into infeasible. Plan with the reserve first; if that fails, allow the same half-start dip and flag the plan with dipsBelowReserve.
The infeasibility reach added a full tank's range to the station's km without the half detour the car drives to get back on the route, so a station with a long detour looked like it reached the destination and the planner blamed the arrival level instead of the range.
Every infeasible plan that reached the destination was blamed on the arrival level, even when the arrival level was met and only the reserve was not, and a trip that needed one stop more than allowed was reported as out of range. Add the reserve and stops reasons so the message names the setting to change.
A fixed cap of three stops made any trip longer than about four tanks infeasible however many stations it had. Allow the full tanks the route needs (100 % down to the reserve) plus two, within 3 to 10.
…d vehicle inputs Infinite prices or detours still counted as candidates, so a route with no usable station was reported as out of range; a repeated id could be planned twice; and a NaN tank, consumption or value of time turned the plan into NaN. Keep only finite numbers and the first entry per id, refuse an unusable vehicle, and treat a non-finite or negative value of time as zero.
…messages Translations for all 17 locales, plus a test that every locale carries the same planner keys with the same placeholders.
The value of time is stored in EUR. Before the exchange rates load, or for a currency the ECB table lacks, convert() returns the amount unchanged, so a forint user was planned with 15 Ft/h and an edit stored forints as euros. Hold the plan and disable the field until a rate exists, and say why.
The field saved on every keystroke and was bound to the rounded saved value, so clearing it snapped to 0 and replanned, and a decimal point could not be typed. Keep a draft like the vehicle fields, commit on blur or Enter, and revert anything invalid.
Collapsing the desktop route panel unmounted the planner, and its cleanup cleared the markers from the map. Hide the planner instead; it still unmounts when there is no route, no corridor station or the fuel can't be planned.
…r arrives Between the corridor landing and the detour stream starting, every station had a null detour and detoursLoading was still false, so the planner flashed the no-usable-station warning for a frame. Treat that state as loading.
Show the reserve and stop-cap messages for the new reasons, note a plan that reaches its first stop below the reserve, and stop telling users to relax their filters when the stations are there but every detour failed.
…reen readers The result area updates without focus moving, so make it a polite live region; give the percent sliders a spoken value with its unit; and mark the selected stop row as pressed.
detourMin is number | undefined on StationGeoJSON, so tsc rejected null.
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Approving. Everything from the first review is fixed, and a second in-depth pass is folded in as commits on the branch.
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Merged. Thank you @yellowhat, this is a great contribution. The planner is a real feature, the DP is solid (it matched a brute-force search on 3,000 random trips), and turning around every item from the first review as its own commit with a test made the second pass easy. That second pass is folded in as commits on your branch, so you can see each change:
It ships in the next release. Thanks again. |
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When a route is active and the selected fuel is priced per litre (gasoline, diesel, LPG), the route panel shows a collapsible Plan fuel stops section. It recommends up to 3 corridor stations, balancing:
It keeps the tank above a minimum reserve the whole way and arrives with at least the chosen level. Recommended stops appear as numbered markers on the map. Clicking one flies to that station.
Inputs
localStorage(pumperly-vehicle) and validated with ZodRoadmap
danger_zone/neverzones: the tank can't drop below itAlgorithm (
src/lib/refuel-planner.ts)A dynamic program over (stops used, station, departure fuel level in whole %). Arrival levels stay continuous, so rounding doesn't add up along the route. A prefix-min over departure levels makes it O(maxStops · n² · L). Above 200 candidates, the route is split into buckets and each bucket keeps its cheapest and its lowest-detour station.
Result states:
ok: stops listed with litres, cost and fuel levelsno-stop-needed: you arrive with X%infeasible: shows the furthest reachable kmOnly prices in the display currency are compared. Stations waiting on a detour time are skipped until it arrives. CNG/LNG/H2 (priced per kg) and EV are excluded.
Fixes found along the way (separate commits)
darkclass on<html>(set before paint by the inline script inlayout.tsx) is now the source of truth, read viauseSyncExternalStore.returnonNEXT_RUNTIMEdoesn't strip imports from the Edge build, but an import insideif (NEXT_RUNTIME === "nodejs")does.instrumentation.tsis now a thin wrapper aroundinstrumentation-node.ts. This removes thenode:crypto/node:pathEdge warnings. Filename references in scrapers and tests are updated.beforeId="unclustered-point"briefly points at a missing layer andaddLayerthrows.beforeIdis now set only once the layer exists, and is rechecked onstyledata.Summary by CodeRabbit
New Features
Bug Fixes