Tria/edr-platform
1
0
Fork 0
mirror of https://github.com/Tria-plc/edr-platform.git synced 2026-08-28 07:51:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #1030 from Tria-plc/freight_feature/usermanagement

Browse Source 
leg-aware capacity and wagon sharing
This commit is contained in:
marshal
2026-07-30 20:22:44 +03:00
committed by GitHub
parent ee3f4a93db acef6870e9
commit 52eda90642
15 changed files with 653 additions and 119 deletions
Download Patch File Download Diff File Expand all files Collapse all files

169
apps/edr-freight-api/src/modules/train-scheduling/booking-batch.service.ts
View File

@@ -127,6 +127,10 @@ export interface ExportSpaceReport {
*/
export interface ExportTrainOption {
scheduleId: string;
/** Schedule's train number (falls back to the built train's number). */
trainNumber: string | null;
/** Built train's name/code, when the schedule runs a Train Builder train. */
trainName: string | null;
departure: Date;
/** Booking cutoff for this train (windowClosesAt), null on legacy rows. */
bookingClosesAt: Date | null;
@@ -297,11 +301,20 @@ export interface BatchBoardSchedule {
/** Train length used by allocated bookings (from wagon-type dimensions). */
allocatedLengthMeters: number;
maxLengthMeters: number | null;
/** Weight committed on the train (allocated + selected-for-batch). */
/**
* Weight committed on the train (allocated + selected-for-batch). On a
* multi-stop corridor this is the HEAVIEST single edge, not the sum —
* disjoint legs (intercity + export) never ride together, so summing
* them over-reports the train against the pull limit.
*/
usedWeightTons: number;
maxWeightTons: number | null;
/** Wagon-slot cap for the train (locomotive/wagon-type derived). */
maxWagons: number | null;
/** Physical consist length of the built train (Train Builder), null without one. */
trainLengthMeters: number | null;
/** Committed gross weight per corridor edge, in stop order; null on 2-stop routes. */
legUsage: Array<{ from: string; to: string; usedWeightTons: number }> | null;
};
counts: {
allocated: number;
@@ -1076,21 +1089,52 @@ export class BookingBatchService implements OnModuleInit {
const leg = budget.legOf(booking.originYardId, booking.destinationYardId);
if (!leg) continue; // this train's route doesn't carry the booking's leg
const room = budget.remainingFor(leg);
const byWagonType = allowed.map(({ wagonTypeId, dims }) => {
const type = wagonTypeId ? typeById.get(wagonTypeId) : undefined;
return {
wagonTypeId,
code: type?.code ?? null,
name: type?.name ?? null,
freeWagons: this.bookableWithin(room, dims).wagons,
};
});
// The abstract budget can't tell wagon types apart — cap each type's free
// count with the PHYSICAL wagons of that type the train (or yard pool)
// actually holds on this leg, and on a built train hide types the consist
// doesn't carry at all. Otherwise a 47×NW5 train advertised "PW2: 47 free".
const stock = await this.trainSchedulingService.wagonStockForSchedule(
schedule.id,
schedule.originStationId,
budget.stops,
);
const ledger = new WagonStockLedger(
stock.remainingByTypeId,
Math.max(1, budget.stops.length - 1),
);
const byWagonType = allowed
.filter(
({ wagonTypeId }) =>
stock.mode !== 'TRAIN' ||
!wagonTypeId ||
(stock.remainingByTypeId.get(wagonTypeId) ?? 0) > 0,
)
.map(({ wagonTypeId, dims }) => {
const type = wagonTypeId ? typeById.get(wagonTypeId) : undefined;
const roomWagons = this.bookableWithin(room, dims).wagons;
const physical = wagonTypeId
? ledger.availableFor([wagonTypeId], leg)
: roomWagons;
return {
wagonTypeId,
code: type?.code ?? null,
name: type?.name ?? null,
freeWagons: Math.min(roomWagons, physical),
};
});
const freeWagons = byWagonType.reduce(
(best, t) => Math.max(best, t.freeWagons),
0,
);
const builtTrain = schedule.trainSet?.train;
out.push({
scheduleId: schedule.id,
trainNumber:
schedule.trainNumber ??
builtTrain?.exportTrainNumber ??
builtTrain?.trainNumber ??
null,
trainName: builtTrain?.trainName ?? builtTrain?.code ?? null,
departure: schedule.scheduledDepartureDate!,
bookingClosesAt: schedule.windowClosesAt ?? null,
isOpen: this.isFillable(schedule),
@@ -1531,9 +1575,18 @@ export class BookingBatchService implements OnModuleInit {
// waiting pool (the 7 that lost the batch), not just the winners. These are
// display-only candidates: they are excluded from the capacity meters below.
const pinnedIds = new Set(bookings.map((b) => b.id));
if (s.scheduledDepartureDate) {
// Corridor stops drive both the day-pool candidate merge and the per-leg
// capacity meters below; a failed lookup degrades to whole-route math.
let stops: string[] = [];
try {
stops = await this.stopsForSchedule(s);
} catch (err) {
this.logger.warn(
`Stop lookup failed for schedule ${s.id}: ${(err as Error).message}`,
);
}
if (s.scheduledDepartureDate && stops.length) {
try {
const stops = await this.stopsForSchedule(s);
const candidates =
await this.bookingsRepository.findBatchPoolByCorridorDay(
stops,
@@ -1662,6 +1715,18 @@ export class BookingBatchService implements OnModuleInit {
const windowBookings = items.filter((i) => i.fullyExecutedAt);
const pendingBookings = items.filter((i) => !i.fullyExecutedAt);
const stopLabels =
stops.length > 2 ? await this.yardLabels(stops) : new Map<string, string>();
const yardsByBookingId = new Map(
bookings.map((b) => [
b.id,
{
originYardId: b.originYardId ?? null,
destinationYardId: b.destinationYardId ?? null,
},
]),
);
return {
scheduleId: s.id,
scheduleReference: s.reference ?? null,
@@ -1707,6 +1772,12 @@ export class BookingBatchService implements OnModuleInit {
items.filter((i) => pinnedIds.has(i.id)),
loco,
s.maxWagons ?? null,
{
stops,
labelByYardId: stopLabels,
yardsByBookingId,
trainLengthMeters: this.builtTrainLengthOf(s),
},
),
counts: {
allocated: items.filter((i) => i.state === "ALLOCATED").length,
@@ -1747,6 +1818,7 @@ export class BookingBatchService implements OnModuleInit {
*/
private computeBoardCapacity(
items: Array<{
id: string;
state: BatchBoardBookingState;
wagons: number;
weightTons: number;
@@ -1754,6 +1826,16 @@ export class BookingBatchService implements OnModuleInit {
}>,
loco: LocomotiveLimits | null,
maxWagons: number | null,
legCtx?: {
/** Ordered corridor stop yard ids; per-leg math needs 3+ stops. */
stops: string[];
labelByYardId: Map<string, string>;
yardsByBookingId: Map<
string,
{ originYardId: string | null; destinationYardId: string | null }
>;
trainLengthMeters: number | null;
},
): BatchBoardSchedule["capacity"] {
const allocated = items.filter((i) => i.state === "ALLOCATED");
// Every booking still targeting this train holds gross weight — including
@@ -1771,18 +1853,72 @@ export class BookingBatchService implements OnModuleInit {
: null;
const round2 = (value: number) => Math.round(value * 100) / 100;
// Per-leg committed weight: a booking holds weight only on the edges it
// rides, so the meter compares the HEAVIEST single edge against the pull
// limit. Whole-route bookings (or yards missing from the stop list) load
// every edge — never under-reported.
const stops = legCtx?.stops ?? [];
let usedWeightTons = round2(
committed.reduce((sum, i) => sum + i.weightTons, 0),
);
let legUsage: BatchBoardSchedule["capacity"]["legUsage"] = null;
if (legCtx && stops.length > 2) {
const stopIndex = new Map(stops.map((yardId, i) => [yardId, i]));
const edges = new Array<number>(stops.length - 1).fill(0);
for (const item of committed) {
const yards = legCtx.yardsByBookingId.get(item.id);
const from = yards?.originYardId
? stopIndex.get(yards.originYardId)
: undefined;
const to = yards?.destinationYardId
? stopIndex.get(yards.destinationYardId)
: undefined;
const leg =
from != null && to != null && from < to
? { from, to }
: { from: 0, to: edges.length };
for (let e = leg.from; e < leg.to; e += 1) edges[e] += item.weightTons;
}
const label = (yardId: string) =>
legCtx.labelByYardId.get(yardId) ?? yardId;
legUsage = edges.map((weight, i) => ({
from: label(stops[i]),
to: label(stops[i + 1]),
usedWeightTons: round2(weight),
}));
usedWeightTons = round2(Math.max(0, ...edges));
}
return {
allocatedWagons: allocated.reduce((sum, i) => sum + i.wagons, 0),
allocatedLengthMeters: round2(
allocated.reduce((sum, i) => sum + i.lengthMeters, 0),
),
maxLengthMeters: caps ? caps.maxLengthMeters : null,
usedWeightTons: round2(committed.reduce((sum, i) => sum + i.weightTons, 0)),
usedWeightTons,
maxWeightTons: caps ? caps.maxWeightTons : null,
maxWagons: maxWagons ?? null,
trainLengthMeters: legCtx?.trainLengthMeters ?? null,
legUsage,
};
}
/** Built consist's physical length (what Train Builder shows), null without a built train. */
private builtTrainLengthOf(s: TrainSchedule): number | null {
const raw = s.trainSet?.totalLengthMeters;
const value = raw != null ? Number(raw) : NaN;
return Number.isFinite(value) && value > 0 ? value : null;
}
/** Yard display labels for corridor stops (falls back to the yard id). */
private async yardLabels(yardIds: string[]): Promise<Map<string, string>> {
if (!yardIds.length) return new Map();
const yards = await this.dataSource
.getRepository(Yard)
.find({ where: { id: In(yardIds) } });
return new Map(yards.map((y) => [y.id, y.label ?? y.code]));
}
private buildScheduleSummary(
s: TrainSchedule,
items: BatchBoardBooking[],
@@ -1829,7 +1965,12 @@ export class BookingBatchService implements OnModuleInit {
maxTrainLengthMeters: Number(loco.maxTrainLengthMeters),
}
: null,
capacity: this.computeBoardCapacity(items, loco, s.maxWagons ?? null),
capacity: this.computeBoardCapacity(items, loco, s.maxWagons ?? null, {
stops: [],
labelByYardId: new Map(),
yardsByBookingId: new Map(),
trainLengthMeters: this.builtTrainLengthOf(s),
}),
counts: {
allocated: items.filter((i) => i.state === "ALLOCATED").length,
selectedForBatch: items.filter((i) => i.state === "SELECTED_FOR_BATCH")

38
apps/edr-freight-api/src/modules/train-scheduling/train-scheduling.service.ts
View File

@@ -4139,6 +4139,7 @@ export class TrainSchedulingService {
fittingBookings,
dto.originStationId,
dto.destinationStationId,
stops,
);
violations.push(
@@ -4185,6 +4186,8 @@ export class TrainSchedulingService {
wagonPlan,
containerPlacements,
placementRules,
legByBookingId,
Math.max(1, stops.length - 1),
),
);
violations.push(
@@ -5011,6 +5014,7 @@ export class TrainSchedulingService {
bookings: Booking[],
scheduleOriginYardId: string,
scheduleDestinationYardId: string,
stops: string[],
): void {
const bookingById = new Map(bookings.map((b) => [b.id, b]));
for (const slot of wagonPlan) {
@@ -5026,13 +5030,33 @@ export class TrainSchedulingService {
b.originYardId === first.originYardId &&
b.destinationYardId === first.destinationYardId,
);
if (!sameCorridor) continue;
slot.boardYardId =
first.originYardId === scheduleOriginYardId ? null : first.originYardId;
slot.alightYardId =
first.destinationYardId === scheduleDestinationYardId
? null
: first.destinationYardId;
if (sameCorridor) {
slot.boardYardId =
first.originYardId === scheduleOriginYardId ? null : first.originYardId;
slot.alightYardId =
first.destinationYardId === scheduleDestinationYardId
? null
: first.destinationYardId;
continue;
}
// Mixed corridors on one wagon (cross-leg TEU sharing): the wagon rides
// the UNION of its cargo legs. A yard missing from the stop list keeps
// the slot on the whole route so capacity is never under-occupied.
let from = Number.POSITIVE_INFINITY;
let to = Number.NEGATIVE_INFINITY;
for (const b of slotBookings) {
const f = stops.indexOf(b.originYardId);
const t = stops.indexOf(b.destinationYardId);
if (f < 0 || t <= f) {
from = Number.POSITIVE_INFINITY;
break;
}
from = Math.min(from, f);
to = Math.max(to, t);
}
if (!Number.isFinite(from) || to <= from) continue;
slot.boardYardId = from === 0 ? null : stops[from];
slot.alightYardId = to === stops.length - 1 ? null : stops[to];
}
}

39
apps/edr-freight-api/src/modules/train-scheduling/wagon-plan-flex.util.spec.ts
View File

@@ -209,7 +209,9 @@ describe('planWagonsWithStock — leg-aware stock (intercity ride-along)', () =>
new Map(entries);
it('lets an intercity booking ride the empty leg of a train that is full on the other leg', () => {
// 1 wagon in stock. Export rides edge 1 only; intercity rides edge 0 only.
// 1 wagon in stock. Export rides edge 1 only; intercity rides edge 0 only:
// the intercity 20ft alights where the export 20ft boards, so both share
// the single physical wagon (cross-leg TEU sharing).
const result = planWagonsWithStock({
bookings: [
containerBooking('EXPORT-1', 1, 1),
@@ -233,16 +235,19 @@ describe('planWagonsWithStock — leg-aware stock (intercity ride-along)', () =>
'EXPORT-1',
'INTERCITY-1',
]);
// Two slots planned, but both drawn from the single physical wagon.
expect(result.plan).toHaveLength(2);
expect(result.plan).toHaveLength(1);
});
it('still defers when the legs overlap and stock is exhausted', () => {
it('still defers when the wagon has no per-edge TEU room and stock is exhausted', () => {
// Export is a 40ft (2 TEU) riding the whole corridor — no edge has room
// for the intercity 20ft, and there is no second wagon to open.
const fortyFooter = containerBooking('EXPORT-1', 1, 1);
fortyFooter.bookingContainers![0]!.containerType = {
code: '40GP',
sizeFt: 40,
} as never;
const result = planWagonsWithStock({
bookings: [
containerBooking('EXPORT-1', 1, 1),
containerBooking('INTERCITY-1', 1, 1),
],
bookings: [fortyFooter, containerBooking('INTERCITY-1', 1, 1)],
allowed,
stock: {
mode: 'TRAIN',
@@ -250,7 +255,6 @@ describe('planWagonsWithStock — leg-aware stock (intercity ride-along)', () =>
codesByTypeId: new Map([[nw6.id, nw6.code]]),
},
legs: legs([
// Both ride edge 0 — they compete for the one wagon.
['EXPORT-1', { from: 0, to: 2 }],
['INTERCITY-1', { from: 0, to: 1 }],
]),
@@ -263,9 +267,9 @@ describe('planWagonsWithStock — leg-aware stock (intercity ride-along)', () =>
expect(result.deferred[0]!.reason).toContain('Train has no free NW6 wagon left');
});
it('never packs bookings with different legs into the same wagon slot', () => {
// Two 20ft units with room to share one wagon by TEU — but disjoint legs
// must open separate slots (each with its own leg), not one mixed slot.
it('packs disjoint-leg 20fts onto one wagon instead of appending a second', () => {
// Two 20ft units, two wagons in stock — cross-leg TEU sharing still fills
// the open wagon (span grows to the union) rather than opening wagon #2.
const result = planWagonsWithStock({
bookings: [
containerBooking('EXPORT-1', 1, 1),
@@ -284,11 +288,12 @@ describe('planWagonsWithStock — leg-aware stock (intercity ride-along)', () =>
edgeCount: 2,
});
expect(result.plan).toHaveLength(2);
const bookingsPerSlot = result.plan.map((s) =>
[...new Set(s.allocations.map((a) => a.bookingId))].sort(),
);
expect(bookingsPerSlot).toEqual([['EXPORT-1'], ['INTERCITY-1']]);
expect(result.deferred).toHaveLength(0);
expect(result.plan).toHaveLength(1);
const bookingsInSlot = [
...new Set(result.plan[0]!.allocations.map((a) => a.bookingId)),
].sort();
expect(bookingsInSlot).toEqual(['EXPORT-1', 'INTERCITY-1']);
});
it('behaves exactly like the whole-route planner when no legs are given', () => {

87
apps/edr-freight-api/src/modules/train-scheduling/wagon-plan-flex.util.ts
View File

@@ -53,18 +53,25 @@ export type FlexPlanResult = {
type OpenSlot = {
slot: WagonPlanSlot;
teuUsed: number;
/**
* TEU occupied PER CORRIDOR EDGE. Containers on different legs share the
* same physical wagon as long as no single edge exceeds the wagon's TEU
* geometry — an intercity 20ft alighting at Adama frees its slot for a 20ft
* boarding there, and two overlapping-leg 20fts coexist while both ride.
*/
teuPerEdge: number[];
kind: SlotLoadType;
/** Kind purity: a bulk wagon carries ONE cargo type at a time. */
cargoTypeId: string | null;
freeCapacityTons: number;
/**
* Corridor leg this slot rides (`"from-to"` stop indexes). Bookings only
* share a slot when their legs are identical — mixing corridors in one slot
* would degrade it to a whole-route slot (see stampSlotLegs) and silently
* re-occupy edges the cargo never rides.
* Leg of the FIRST booking placed (`"from-to"` stop indexes). Containers
* prefer a same-leg slot but may extend onto a different-leg one (span
* grows to the union); bulk still shares only on an identical leg.
*/
legKey: string;
/** Contiguous stop-index span this wagon physically rides (union of its cargo legs). */
covered: { from: number; to: number };
};
/** Stop-index range a booking occupies: edges `from..to-1` of the corridor. */
@@ -227,16 +234,54 @@ export function planWagonsWithStock(params: {
for (let e = leg.from; e < leg.to; e += 1) row[e] = (row[e] ?? 0) + 1;
const open: OpenSlot = {
slot: slotFromWagonType(chosen, kind),
teuUsed: 0,
teuPerEdge: new Array<number>(edgeCount).fill(0),
kind,
cargoTypeId,
freeCapacityTons: Number(chosen.capacityTons),
legKey: legKeyOf(leg),
covered: { ...leg },
};
openSlots.push(open);
return open;
};
/** TEU room on every edge of the unit's leg. */
const teuFits = (open: OpenSlot, leg: BookingLeg, teu: number): boolean => {
for (let e = leg.from; e < leg.to; e += 1) {
if ((open.teuPerEdge[e] ?? 0) + teu > MAX_TEU_SLOTS_PER_WAGON) return false;
}
return true;
};
/**
* Whether the slot's ridden span can grow to include this leg: every NEW
* edge (outside the current span) must still have a physical wagon of the
* slot's type spare — extending the span puts this wagon on those edges.
*/
const canExtendSpan = (open: OpenSlot, leg: BookingLeg): boolean => {
const total = stock.remainingByTypeId.get(open.slot.wagonTypeId) ?? 0;
const row = usedPerEdge.get(open.slot.wagonTypeId);
const from = Math.min(open.covered.from, leg.from);
const to = Math.max(open.covered.to, leg.to);
for (let e = from; e < to; e += 1) {
if (e >= open.covered.from && e < open.covered.to) continue;
if (total - (row?.[e] ?? 0) <= 0) return false;
}
return true;
};
/** Grow the slot's span onto the leg's new edges, consuming stock there. */
const extendSpan = (open: OpenSlot, leg: BookingLeg): void => {
const row = usedRow(open.slot.wagonTypeId);
const from = Math.min(open.covered.from, leg.from);
const to = Math.max(open.covered.to, leg.to);
for (let e = from; e < to; e += 1) {
if (e >= open.covered.from && e < open.covered.to) continue;
row[e] = (row[e] ?? 0) + 1;
}
open.covered = { from, to };
};
const tryPlaceBooking = (booking: Booking): PlacementProblem | null => {
const leg = legFor(booking);
const legKey = legKeyOf(leg);
@@ -260,17 +305,23 @@ export function planWagonsWithStock(params: {
}
const allowedIds = new Set(candidates.map((wt) => wt.id));
const teu = unit.teuSlots ?? teuSlotsForSizeFt(unit.sizeFt ?? 20);
let target = openSlots.find(
(open) =>
open.kind === 'CONTAINER' &&
open.legKey === legKey &&
allowedIds.has(open.slot.wagonTypeId) &&
open.teuUsed + teu <= MAX_TEU_SLOTS_PER_WAGON,
);
const fitsSlot = (open: OpenSlot): boolean =>
open.kind === 'CONTAINER' &&
allowedIds.has(open.slot.wagonTypeId) &&
teuFits(open, leg, teu) &&
canExtendSpan(open, leg);
// Same-leg slots first (keeps legacy packing byte-identical), then any
// open wagon with per-edge TEU room — an intercity 20ft rides an
// export wagon's spare slot instead of appending a new wagon.
let target =
openSlots.find((open) => open.legKey === legKey && fitsSlot(open)) ??
openSlots.find(fitsSlot);
if (!target) {
const openedSlot = openSlot(candidates, 'CONTAINER', null, leg);
if ('message' in openedSlot) return openedSlot;
target = openedSlot;
} else {
extendSpan(target, leg);
}
addAllocation(
target.slot,
@@ -279,7 +330,9 @@ export function planWagonsWithStock(params: {
unit.grossWeightTons,
AllocationLoadType.Container,
);
target.teuUsed += teu;
for (let e = leg.from; e < leg.to; e += 1) {
target.teuPerEdge[e] = (target.teuPerEdge[e] ?? 0) + teu;
}
}
return null;
}
@@ -343,7 +396,8 @@ export function planWagonsWithStock(params: {
);
const slotCountSnapshot = openSlots.length;
const slotStateSnapshot = openSlots.map((open) => ({
teuUsed: open.teuUsed,
teuPerEdge: [...open.teuPerEdge],
covered: { ...open.covered },
freeCapacityTons: open.freeCapacityTons,
assignedWeightTons: open.slot.assignedWeightTons,
allocationCount: open.slot.allocations.length,
@@ -363,7 +417,8 @@ export function planWagonsWithStock(params: {
openSlots.forEach((open, index) => {
const snap = slotStateSnapshot[index];
if (!snap) return;
open.teuUsed = snap.teuUsed;
open.teuPerEdge = [...snap.teuPerEdge];
open.covered = { ...snap.covered };
open.freeCapacityTons = snap.freeCapacityTons;
open.slot.assignedWeightTons = snap.assignedWeightTons;
open.slot.allocations.length = snap.allocationCount;

52
apps/edr-freight-api/src/modules/train-scheduling/wagon-plan.util.ts
View File

@@ -665,6 +665,14 @@ export function validateContainerPlacements(
wagonPlan: WagonPlanSlot[],
placements: ContainerPlacementInput[],
rules?: ContainerPlacementRules,
/**
* Leg-aware occupancy (cross-leg TEU sharing): booking id → stop-index leg.
* With legs, a wagon's TEU/weight caps hold PER CORRIDOR EDGE — an intercity
* 20ft and an export 20ft coexist on one wagon when their edges allow it.
* Omitted → one edge, byte-identical to the whole-route check.
*/
legs?: Map<string, { from: number; to: number }>,
edgeCount?: number,
): string[] {
const violations: string[] = [];
const units = expandBookingContainerUnits(containerBookings);
@@ -721,8 +729,18 @@ export function validateContainerPlacements(
}
}
const slotTeuUsed = new Map<number, number>();
const slotWeightUsed = new Map<number, number>();
// TEU and weight are tracked PER EDGE of a unit's leg; without legs there is
// a single edge and this is exactly the old whole-route accounting.
const edges = Math.max(1, edgeCount ?? 1);
const legOf = (bookingId: string): { from: number; to: number } => {
const leg = legs?.get(bookingId);
if (!leg || leg.from < 0 || leg.to > edges || leg.from >= leg.to) {
return { from: 0, to: edges };
}
return leg;
};
const slotTeuUsed = new Map<number, number[]>();
const slotWeightUsed = new Map<number, number[]>();
const slotBySeq = new Map(wagonPlan.map((s) => [s.sequenceNo, s]));
for (const placement of placements) {
@@ -734,22 +752,38 @@ export function validateContainerPlacements(
if (!unit) continue;
const teu = unit.teuSlots ?? teuSlotsForSizeFt(unit.sizeFt ?? 20);
const usedTeu = slotTeuUsed.get(placement.sequenceNo) ?? 0;
if (usedTeu + teu > MAX_TEU_SLOTS_PER_WAGON) {
const leg = legOf(unit.bookingId);
const teuRow =
slotTeuUsed.get(placement.sequenceNo) ?? new Array<number>(edges).fill(0);
let teuFits = true;
for (let e = leg.from; e < leg.to; e += 1) {
if ((teuRow[e] ?? 0) + teu > MAX_TEU_SLOTS_PER_WAGON) {
teuFits = false;
break;
}
}
if (!teuFits) {
violations.push(
`Wagon #${placement.sequenceNo} cannot fit another ${unit.containerTypeCode} (max 1×40ft or 2×20ft per wagon)`,
);
} else {
slotTeuUsed.set(placement.sequenceNo, usedTeu + teu);
for (let e = leg.from; e < leg.to; e += 1) teuRow[e] = (teuRow[e] ?? 0) + teu;
slotTeuUsed.set(placement.sequenceNo, teuRow);
}
const slot = slotBySeq.get(placement.sequenceNo);
if (slot) {
const weight = roundTons(slotWeightUsed.get(placement.sequenceNo) ?? 0) + unit.grossWeightTons;
slotWeightUsed.set(placement.sequenceNo, weight);
if (weight > slot.capacityTons) {
const weightRow =
slotWeightUsed.get(placement.sequenceNo) ?? new Array<number>(edges).fill(0);
let heaviestEdge = 0;
for (let e = leg.from; e < leg.to; e += 1) {
weightRow[e] = roundTons((weightRow[e] ?? 0) + unit.grossWeightTons);
heaviestEdge = Math.max(heaviestEdge, weightRow[e]);
}
slotWeightUsed.set(placement.sequenceNo, weightRow);
if (heaviestEdge > slot.capacityTons) {
violations.push(
`Wagon #${placement.sequenceNo} total container weight ${weight}T exceeds capacity ${slot.capacityTons}T`,
`Wagon #${placement.sequenceNo} total container weight ${heaviestEdge}T exceeds capacity ${slot.capacityTons}T`,
);
}
}