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edr-platform/apps/edr-freight-api/src/modules/train-scheduling/booking-window.service.ts
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import { Injectable, Logger, NotFoundException, OnModuleInit } from '@nestjs/common';
import { Cron } from '@nestjs/schedule';
import { InjectDataSource } from '@nestjs/typeorm';
import { DataSource } from 'typeorm';
import {
NotificationAudience,
NotificationType,
TrainScheduleStatus as TrainScheduleStatusEnum,
} from '@edr/types';
import { Booking } from '../bookings/entities/booking.entity';
import { TrainSchedule } from '../train-schedules/entities/train-schedule.entity';
import { TrainSchedulesRepository } from '../train-schedules/train-schedules.repository';
import { NotificationsService } from '../notifications/notifications.service';
import { NotificationInboxService } from '../notification-inbox/notification-inbox.service';
import {
companyNotifyPhoneExpr,
primaryContactUserJoin,
} from '../notifications/resolve-company-phone.util';
import { BookingBatchService } from './booking-batch.service';
import { BookingWindowGateway } from './booking-window.gateway';
import { TrainSchedulingService, effectiveWindowConfig } from './train-scheduling.service';
import { BATCH_TIMEZONE } from './booking-batch.constants';
import {
bookingCloseCutoff,
clampCloseToOfficeHours,
eatDay,
nextCycleOpensAt,
type OfficeHours,
} from './batch-window.util';
import { type BookingWindowConfig } from './booking-window.config';
/**
* Drives the one-booking-day window cycle for IMPORT schedules and the FCFS
* booking window for EXPORT schedules. All state lives in DB timestamps on the
* schedule row, so every transition is derived purely from the clock — a restart
* resumes mid-phase with no loss (onModuleInit runs one tick immediately).
*
* Import & domestic phases: PRE_WINDOW → OPEN (customers book) → DOC_REVIEW
* (staff accept documents) → PAYMENT (batch reserves in priority order, customers
* pay) → reopen same day | CLOSED_FOR_DAY | DONE (full → auto-finalized).
* Export phases: PRE_WINDOW → OPEN → DONE (no batch, no priority).
* Only PRE-MIGRATION rows have windowPhase NULL; those are served by the legacy
* fill (runBatchFill), which this tick invokes every 5th minute. New schedules of
* every direction get a window phase.
*/
@Injectable()
export class BookingWindowService implements OnModuleInit {
private readonly logger = new Logger(BookingWindowService.name);
private ticking = false;
private tickCount = 0;
constructor(
@InjectDataSource() private readonly dataSource: DataSource,
private readonly trainSchedulesRepository: TrainSchedulesRepository,
private readonly bookingBatchService: BookingBatchService,
private readonly trainSchedulingService: TrainSchedulingService,
private readonly notifications: NotificationsService,
private readonly inbox: NotificationInboxService,
private readonly gateway: BookingWindowGateway,
) {}
async onModuleInit(): Promise<void> {
await this.tick().catch((err) =>
this.logger.warn(`Boot window tick failed: ${(err as Error).message}`),
);
}
// 10-second cadence: every transition is derived from persisted timestamps
// and applied idempotently, so a finer tick only shrinks the lag between a
// deadline passing and the phase actually moving (was a full minute).
@Cron('*/10 * * * * *', { name: 'booking-window-tick', timeZone: BATCH_TIMEZONE })
async tick(): Promise<void> {
if (this.ticking) return;
this.ticking = true;
try {
const now = new Date();
const liveCfg = await this.trainSchedulingService.getWindowConfig();
const active = (
await this.trainSchedulesRepository.findAll({
where: [
{ status: TrainScheduleStatusEnum.Draft },
{ status: TrainScheduleStatusEnum.Scheduled },
],
})
).filter(
// CLOSED_FOR_DAY is legacy (the daily desk now reopens via PRE_WINDOW):
// still pick those rows up so advanceImport can revive them next morning.
(s) => s.windowPhase != null && s.windowPhase !== 'DONE',
);
for (const schedule of active) {
try {
// Each train runs under its OWN frozen rule snapshot, not the live global
// config — a later global-rules edit must not retro-change the window an
// existing train already advertised, and the reopen cycles must match the
// board (which is drawn from the same snapshot).
await this.advanceSchedule(
schedule,
effectiveWindowConfig(schedule, liveCfg),
now,
);
} catch (err) {
// This is THE line to watch when a window freezes mid-phase: the tick
// catches a throw here per-schedule and moves on, so a schedule whose
// transition keeps throwing stays stuck in its phase forever. Log the
// phase + stack so the failing step is obvious.
this.logger.error(
`[WINDOW] transition FAILED for schedule ${schedule.id} ` +
`(phase=${schedule.windowPhase}, cycle=${schedule.bookingCycleNo}): ` +
`${(err as Error).message}`,
);
this.logger.error(
`[WINDOW] stack: ${((err as Error).stack ?? "").split("\n").slice(0, 5).join(" | ")}`,
);
}
}
await this.settleOverdueReservations();
// Legacy fill (DOMESTIC / pre-migration schedules) every 5 minutes
// (30 ticks at the 10-second cadence).
this.tickCount += 1;
if (this.tickCount % 30 === 0) {
await this.bookingBatchService.runBatchFill();
}
} finally {
this.ticking = false;
}
}
/** Staff finished document review early — start the batch/payment phase now. */
async completeDocReview(scheduleId: string): Promise<TrainSchedule> {
const schedule = await this.trainSchedulesRepository.findById(scheduleId);
if (!schedule) {
throw new NotFoundException(`Train schedule ${scheduleId} not found`);
}
if (schedule.windowPhase !== 'DOC_REVIEW') {
// Idempotent for the whole route-day group: only DOC_REVIEW schedules move.
return schedule;
}
const now = new Date();
const liveCfg = await this.trainSchedulingService.getWindowConfig();
// Stamp the whole route-day group so one staff action releases every train
// sharing this booking day's pool.
const group = (
await this.trainSchedulesRepository.findAll({
where: {
originStationId: schedule.originStationId,
destinationStationId: schedule.destinationStationId,
},
})
).filter(
(s) =>
s.windowPhase === 'DOC_REVIEW' &&
s.scheduledDepartureDate != null &&
eatDay(s.scheduledDepartureDate) === eatDay(schedule.scheduledDepartureDate),
);
for (const s of group) {
await this.dataSource
.getRepository(TrainSchedule)
.update(s.id, { docReviewCompletedAt: now });
s.docReviewCompletedAt = now;
await this.advanceSchedule(s, effectiveWindowConfig(s, liveCfg), now);
// The batch fill emits only for trains it actually reserved onto — this
// covers the empty-pool case so every open board still refetches. Push
// failures only log; the doc-review completion itself already persisted.
try {
this.gateway.emitBatchChanged(s.id, 'doc_review_completed');
} catch (err) {
this.logger.warn(
`Batch-board push failed for ${s.id}: ${(err as Error).message}`,
);
}
}
const fresh = await this.trainSchedulesRepository.findById(scheduleId);
return fresh ?? schedule;
}
// ---- transitions ------------------------------------------------------------
private async advanceSchedule(
schedule: TrainSchedule,
cfg: BookingWindowConfig,
now: Date,
): Promise<void> {
// Apply every transition that is due, in order (fast-forwards after downtime).
for (let guard = 0; guard < 6; guard += 1) {
const advanced =
schedule.direction === 'EXPORT'
? await this.advanceExport(schedule, now)
: await this.advanceImport(schedule, cfg, now);
if (!advanced) return;
// Push the new window state to portal home / backoffice GL sections so
// they refresh instantly instead of waiting out their poll interval.
this.gateway.emitPhase(schedule);
}
}
/** Export: PRE_WINDOW → OPEN at opensAt, OPEN → DONE at closesAt (= departure). */
private async advanceExport(schedule: TrainSchedule, now: Date): Promise<boolean> {
if (
schedule.windowPhase === 'PRE_WINDOW' &&
schedule.windowOpensAt &&
now >= schedule.windowOpensAt
) {
await this.setPhase(schedule, {
windowPhase: 'OPEN',
bookingCycleNo: schedule.bookingCycleNo + 1,
});
if (schedule.bookingWindowStatus !== 'FULL') {
await this.bookingBatchService.setWindow(schedule.id, 'OPEN');
schedule.bookingWindowStatus = 'OPEN';
}
// Fire-and-forget: a slow SMS/email gateway must not stall the tick loop
// (the `ticking` guard would otherwise delay every schedule's transition).
void this.notifyWindowOpened(schedule);
this.logger.log(`Export booking window opened for schedule ${schedule.id}`);
return true;
}
if (
schedule.windowPhase === 'OPEN' &&
schedule.windowClosesAt &&
now >= schedule.windowClosesAt
) {
await this.setPhase(schedule, { windowPhase: 'DONE' });
if (schedule.bookingWindowStatus === 'OPEN') {
await this.bookingBatchService.setWindow(schedule.id, 'CLOSED');
schedule.bookingWindowStatus = 'CLOSED';
}
return true;
}
return false;
}
private async advanceImport(
schedule: TrainSchedule,
cfg: BookingWindowConfig,
now: Date,
): Promise<boolean> {
const { windowPhase, windowOpensAt, windowClosesAt } = schedule;
// Legacy rows parked at CLOSED_FOR_DAY predate the daily-desk reopen: revive
// them through the same not-full conclude path so they resume next morning
// (or finalize as DONE if no cycle fits before departure).
if (windowPhase === 'CLOSED_FOR_DAY') {
await this.concludeCycle(schedule, cfg, now);
return true;
}
if (windowPhase === 'PRE_WINDOW' && windowOpensAt && now >= windowOpensAt) {
await this.setPhase(schedule, {
windowPhase: 'OPEN',
bookingCycleNo: schedule.bookingCycleNo + 1,
docReviewCompletedAt: null,
docReviewEndsAt: null,
paymentPhaseEndsAt: null,
});
if (schedule.bookingWindowStatus !== 'FULL') {
await this.bookingBatchService.setWindow(schedule.id, 'OPEN');
schedule.bookingWindowStatus = 'OPEN';
}
// Only announce the first opening of the day; reopen cycles don't re-notify.
// Fire-and-forget so a slow SMS/email gateway never stalls the tick loop.
if (schedule.bookingCycleNo === 1) void this.notifyWindowOpened(schedule);
this.logger.log(
`[WINDOW] ${schedule.id} PRE_WINDOW→OPEN — booking window opened ` +
`(cycle ${schedule.bookingCycleNo})`,
);
return true;
}
if (windowPhase === 'OPEN' && windowClosesAt && now >= windowClosesAt) {
const docReviewEndsAt = new Date(
windowClosesAt.getTime() + cfg.docReviewMinutes * 60_000,
);
await this.setPhase(schedule, { windowPhase: 'DOC_REVIEW', docReviewEndsAt });
if (schedule.bookingWindowStatus === 'OPEN') {
await this.bookingBatchService.setWindow(schedule.id, 'CLOSED');
schedule.bookingWindowStatus = 'CLOSED';
}
this.logger.log(
`[WINDOW] ${schedule.id} OPEN→DOC_REVIEW — booking closed; staff document ` +
`review until ${docReviewEndsAt.toISOString()}`,
);
return true;
}
if (
windowPhase === 'DOC_REVIEW' &&
(schedule.docReviewCompletedAt != null ||
(schedule.docReviewEndsAt != null && now >= schedule.docReviewEndsAt))
) {
const paymentPhaseEndsAt = new Date(now.getTime() + cfg.paymentWindowMinutes * 60_000);
await this.setPhase(schedule, { windowPhase: 'PAYMENT', paymentPhaseEndsAt });
const routeDay = {
originYardId: schedule.originStationId,
destinationYardId: schedule.destinationStationId,
day: eatDay(schedule.scheduledDepartureDate),
};
// Doc review is over: bookings staff never accepted (still pending) can no
// longer make this train — expire them BEFORE the batch so they never
// compete for capacity and never reach the pool.
await this.bookingBatchService.expireUnacceptedForRouteDay(routeDay);
// Run the batch: priority fill over the route-day pool, reserving pay windows
// (or allocating government) — skipped automatically for everyone who fits
// is handled inside the fill (all fit → all reserved → all notified).
await this.bookingBatchService.processRouteDay(routeDay);
// Batch reserved nobody (empty pool, or it allocated without pay windows):
// a PAYMENT phase with nobody to pay is a dead hour with the window shut.
// Conclude straight away — full → DONE, otherwise reopen per office hours.
if (!(await this.bookingBatchService.hasLiveReservations(schedule.id))) {
this.logger.log(
`[WINDOW] ${schedule.id} DOC_REVIEW→PAYMENT — batch reserved nothing; ` +
`skipping the empty payment phase and concluding the cycle`,
);
await this.concludeCycle(schedule, cfg, now);
return true;
}
this.logger.log(
`[WINDOW] ${schedule.id} DOC_REVIEW→PAYMENT — batch ran; payment phase ` +
`until ${paymentPhaseEndsAt.toISOString()}`,
);
return true;
}
if (
windowPhase === 'PAYMENT' &&
schedule.paymentPhaseEndsAt != null &&
now >= schedule.paymentPhaseEndsAt
) {
this.logger.log(
`[WINDOW] ${schedule.id} PAYMENT window ended — settling reservations ` +
`(allocate paid / expire unpaid) then concluding the cycle`,
);
await this.bookingBatchService.settleDueReservations(schedule.id);
// The settle expires unpaid reservations and promotes the waiting list into
// the wagons they free. Those promoted customers get a fresh pay window, and
// `extendPaymentPhaseForTopUp` pushes `paymentPhaseEndsAt` past `now` to
// cover it. Concluding here on the STALE in-memory timestamp would end the
// cycle the top-up just extended and expire them before they could pay — so
// re-read, and stay in PAYMENT if the deadline moved.
const settled = await this.trainSchedulesRepository.findById(schedule.id);
if (settled?.paymentPhaseEndsAt && now < settled.paymentPhaseEndsAt) {
schedule.paymentPhaseEndsAt = settled.paymentPhaseEndsAt;
this.logger.log(
`[WINDOW] ${schedule.id} PAYMENT extended to ` +
`${settled.paymentPhaseEndsAt.toISOString()} — waiting-list bookings were ` +
`promoted into the freed wagons; not concluding this cycle yet`,
);
return true;
}
// `paymentPhaseEndsAt` is stamped when the phase starts; each reservation's own
// deadline is set milliseconds later, per booking, so the phase always expires
// a fraction before the reservations it opened. Concluding here would end the
// cycle while customers still had time to pay, and the settle that finally
// expires them (next tick) would have no cycle left to promote the waiting
// list into. Hold in PAYMENT until every reservation has actually resolved.
if (await this.bookingBatchService.hasLiveReservations(schedule.id)) {
this.logger.log(
`[WINDOW] ${schedule.id} PAYMENT phase past its deadline but reservations ` +
`are still within their pay windows — holding the cycle open`,
);
return true;
}
await this.concludeCycle(schedule, cfg, now);
return true;
}
return false;
}
/**
* After settle: full → finalize + DONE; waiting bookings still fit → fresh pay
* window, back to PAYMENT; otherwise reopen (office hours decide when) or DONE.
*/
private async concludeCycle(
schedule: TrainSchedule,
cfg: BookingWindowConfig,
now: Date,
): Promise<void> {
const full = await this.bookingBatchService.isScheduleFull(schedule.id);
if (full) {
await this.bookingBatchService.setWindow(schedule.id, 'FULL');
await this.setPhase(schedule, { windowPhase: 'DONE' });
await this.tryAutoFinalize(schedule.id);
this.logger.log(
`[WINDOW] ${schedule.id} conclude → train FULL — window DONE, finalizing`,
);
// This train is done. If no other train on the route-day can still take
// the waiting list, those bookings have nowhere to go — expire + notify
// them now instead of leaving them FULLY_EXECUTED forever.
await this.bookingBatchService.expireLeftoverDayPool(schedule.id);
return;
}
// Not full, so any FULL flag left over from a batch whose bookings later
// expired is stale. Clear it here too: the PRE_WINDOW→OPEN transition below
// refuses to reopen a FULL schedule, which is how a train with an empty
// consist used to cycle forever without ever being fillable again. Re-read
// the flag onto the in-memory row — advanceSchedule keeps looping on this
// same object, and PRE_WINDOW→OPEN reads it.
if (schedule.bookingWindowStatus === 'FULL') {
await this.bookingBatchService.refreshWindowStatus(schedule.id);
const fresh = await this.trainSchedulesRepository.findById(schedule.id);
if (fresh) schedule.bookingWindowStatus = fresh.bookingWindowStatus;
}
// The window reopens only once the waiting list is exhausted: a booking can
// still reach the pool mid-payment (late doc accept, consolidation partner),
// so retry the batch before reopening. Anything that fits gets a fresh pay
// window and the cycle stays in PAYMENT; check live reservations on THIS
// schedule because the day-level fill may have reserved onto a sibling.
// Waiting bookings that fit no train stay pooled and the window reopens.
// Booking shuts at the configured cutoff (departure closeOffset), not
// departure — every phase-end below is bounded by it, mirroring the initial
// window computation.
const cutoff = bookingCloseCutoff(
schedule.scheduledDepartureDate,
schedule.direction,
cfg,
);
const promoted = await this.bookingBatchService.fillFromWaitingList(schedule.id);
if (
promoted > 0 &&
(await this.bookingBatchService.hasLiveReservations(schedule.id))
) {
let paymentPhaseEndsAt = new Date(
now.getTime() + cfg.paymentWindowMinutes * 60_000,
);
if (paymentPhaseEndsAt > cutoff) {
paymentPhaseEndsAt = cutoff;
}
await this.setPhase(schedule, { windowPhase: 'PAYMENT', paymentPhaseEndsAt });
this.logger.log(
`[WINDOW] ${schedule.id} conclude → waiting list still had bookings that ` +
`fit — back in PAYMENT until ${paymentPhaseEndsAt.toISOString()}, no reopen yet`,
);
return;
}
// Doc review + payment have already run, so the desk is ready to reopen NOW —
// office hours decide whether that is this afternoon or tomorrow morning. Past
// the last cycle before departure, nextCycleOpensAt returns null and we finish.
const officeHours: OfficeHours = {
windowOpenHour: cfg.windowOpenHour,
windowCloseHour: cfg.windowCloseHour,
};
const nextOpensAt = nextCycleOpensAt(now, officeHours, cutoff);
if (nextOpensAt == null) {
await this.setPhase(schedule, { windowPhase: 'DONE' });
this.logger.log(
`[WINDOW] ${schedule.id} conclude → not full but no cycle fits before ` +
`departure — window DONE`,
);
// No further cycle on this train. Same sweep as the FULL branch: if no
// sibling train can still take the day's waiting list, expire + notify.
await this.bookingBatchService.expireLeftoverDayPool(schedule.id);
return;
}
let nextClosesAt = new Date(
nextOpensAt.getTime() + cfg.windowDurationHours * 3_600_000,
);
// Office hours end a running window early: never let the duration outlive
// the desk close (open 16:00, 3h, desk 817 → closes 17:00).
nextClosesAt = clampCloseToOfficeHours(nextOpensAt, nextClosesAt, officeHours);
if (nextClosesAt > cutoff) {
nextClosesAt = cutoff;
}
// Stays PRE_WINDOW (not CLOSED_FOR_DAY): the tick reopens it at nextOpensAt,
// whether that is later today or next morning after the office-hours break.
await this.setPhase(schedule, {
windowPhase: 'PRE_WINDOW',
windowOpensAt: nextOpensAt,
windowClosesAt: nextClosesAt,
docReviewCompletedAt: null,
docReviewEndsAt: null,
paymentPhaseEndsAt: null,
});
const sameDay = eatDay(nextOpensAt) === eatDay(now);
this.logger.log(
`[WINDOW] ${schedule.id} conclude → NOT full, waiting list may remain — ` +
`REOPENS ${sameDay ? 'today' : 'next booking day'} at ${nextOpensAt.toISOString()}`,
);
}
private async tryAutoFinalize(scheduleId: string): Promise<void> {
try {
await this.trainSchedulingService.finalizeSchedule(scheduleId);
this.logger.log(`Schedule ${scheduleId} is full — auto-finalized`);
} catch (err) {
// Not DRAFT / no linked bookings yet — staff finalize manually.
this.logger.warn(
`Auto-finalize skipped for ${scheduleId}: ${(err as Error).message}`,
);
}
}
/** Durable settle backstop: expire/allocate reservations whose deadline passed. */
private async settleOverdueReservations(): Promise<void> {
const overdue = await this.dataSource
.getRepository(Booking)
.createQueryBuilder('b')
.select('DISTINCT b.train_schedule_id', 'scheduleId')
.where(`b.status IN ('SELECTED_FOR_BATCH', 'AWAITING_PAYMENT')`)
.andWhere('b.payment_deadline <= now()')
.andWhere('b.train_schedule_id IS NOT NULL')
.getRawMany<{ scheduleId: string }>();
for (const { scheduleId } of overdue) {
try {
await this.bookingBatchService.settleDueReservations(scheduleId);
} catch (err) {
this.logger.warn(
`Overdue settle failed for ${scheduleId}: ${(err as Error).message}`,
);
}
}
}
/**
* SMS + email every active-contract customer on this schedule's route when its
* booking window opens, so they can book from the portal home before it closes.
* Fire-and-forget; a failed notification never blocks the window transition.
*/
private async notifyWindowOpened(schedule: TrainSchedule): Promise<void> {
try {
const rows: Array<{
company_id: string;
phone: string | null;
email: string | null;
}> = await this.dataSource.query(
`SELECT DISTINCT
c.company_id,
${companyNotifyPhoneExpr('co')} AS phone,
COALESCE(co.email, co.general_manager_email) AS email
FROM freight.contract_routes cr
JOIN freight.contracts c
ON c.id = cr.contract_id
AND c.status IN ('CONTRACT_ACTIVE', 'FULLY_EXECUTED')
AND c.deleted_at IS NULL
JOIN freight.companies co ON co.id = c.company_id
${primaryContactUserJoin('co')}
WHERE cr.origin_yard_id = $1
AND cr.destination_yard_id = $2
AND cr.deleted_at IS NULL`,
[schedule.originStationId, schedule.destinationStationId],
);
if (!rows.length) return;
const closes = schedule.windowClosesAt
? schedule.windowClosesAt.toLocaleString('en-GB', { timeZone: BATCH_TIMEZONE })
: 'later today';
const depart = schedule.scheduledDepartureDate.toLocaleDateString('en-GB', {
timeZone: BATCH_TIMEZONE,
});
const msg =
`Booking is now open for the train departing ${depart}. ` +
`Book your shipment from the portal home page before ${closes} EAT.`;
const seenPhone = new Set<string>();
const seenEmail = new Set<string>();
const seenCompany = new Set<string>();
for (const r of rows) {
if (r.phone && !seenPhone.has(r.phone)) {
seenPhone.add(r.phone);
await this.notifications
.directSend('sms', r.phone, msg)
.catch((e) => this.logger.warn(`Window-open SMS failed: ${(e as Error).message}`));
}
if (r.email && !seenEmail.has(r.email)) {
seenEmail.add(r.email);
await this.notifications
.directSend('email', r.email, msg)
.catch((e) => this.logger.warn(`Window-open email failed: ${(e as Error).message}`));
}
// In-app inbox item for every portal user of each eligible company,
// deep-linking to the new-booking page.
if (r.company_id && !seenCompany.has(r.company_id)) {
seenCompany.add(r.company_id);
void this.inbox.notify({
recipients: { companyId: r.company_id },
audience: NotificationAudience.PORTAL,
type: NotificationType.SCHEDULE_UPDATE,
title: 'Booking window open',
body: msg,
link: '/bookings/new',
data: { trainScheduleId: schedule.id },
});
}
}
this.logger.log(
`Notified ${seenPhone.size} phone / ${seenEmail.size} email / ${seenCompany.size} companies (in-app) of open window for schedule ${schedule.id}`,
);
} catch (err) {
this.logger.warn(
`notifyWindowOpened failed for ${schedule.id}: ${(err as Error).message}`,
);
}
}
private async setPhase(
schedule: TrainSchedule,
patch: Partial<
Pick<
TrainSchedule,
| 'windowPhase'
| 'windowOpensAt'
| 'windowClosesAt'
| 'docReviewEndsAt'
| 'docReviewCompletedAt'
| 'paymentPhaseEndsAt'
| 'bookingCycleNo'
>
>,
): Promise<void> {
await this.dataSource.getRepository(TrainSchedule).update(schedule.id, patch);
Object.assign(schedule, patch);
}
}