mirror of
https://github.com/Tria-plc/edr-platform.git
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e0c3044933
- Added TrainSetLocomotive entity to link multiple locomotives to a train set. - Updated TrainSet entity to include a OneToMany relationship with TrainSetLocomotive. - Modified the train scheduling logic to require at least two locomotives for a train set. - Enhanced the UI components to support selecting multiple locomotives. - Introduced new permissions for viewing customs clearance. - Updated migrations to create the train_set_locomotives table and backfill existing data. - Implemented utility functions for managing train numbers based on cargo type and direction. - Added tests for train number utilities to ensure correct functionality.
69 lines
2.2 KiB
TypeScript
69 lines
2.2 KiB
TypeScript
/**
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* Fixed train-number pools assigned to a train on dispatch.
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*
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* The prefix encodes cargo type (8 = container, 1 = bulk) and the parity encodes
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* trade direction (odd = export, even = import). Numbers are finite and recycle:
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* a number is "in use" only while its train is DISPATCHED and not yet ARRIVED.
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*/
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export const CONTAINER_EXPORT_NUMBERS = [
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'8001', '8101', '8201', '8301', '8401', '8501', '8601', '8701', '8801', '8901',
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] as const;
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export const CONTAINER_IMPORT_NUMBERS = [
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'8002', '8102', '8202', '8302', '8402', '8502', '8602', '8702', '8802', '8902',
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] as const;
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export const BULK_EXPORT_NUMBERS = ['1101', '1103', '1105', '1107'] as const;
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export const BULK_IMPORT_NUMBERS = ['1002', '1004', '1006', '1008'] as const;
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export type CargoKind = 'CONTAINER' | 'BULK';
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export type PoolDirection = 'IMPORT' | 'EXPORT';
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export interface TrainNumberPool {
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cargo: CargoKind;
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/** EXPORT = odd numbers, IMPORT = even numbers. */
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direction: PoolDirection;
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numbers: readonly string[];
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}
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/**
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* Resolve which fixed pool a train draws from.
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*
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* - Cargo: container vs bulk by dominant wagon count; ties resolve to container.
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* - Direction: EXPORT → odd pool, IMPORT → even pool. DOMESTIC (neither end is
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* Djibouti) has no dedicated pool, so it defaults to the export/odd pool.
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*/
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export function pickTrainNumberPool(
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containerWagons: number,
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bulkWagons: number,
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direction: 'IMPORT' | 'EXPORT' | 'DOMESTIC' | null | undefined,
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): TrainNumberPool {
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const cargo: CargoKind = bulkWagons > containerWagons ? 'BULK' : 'CONTAINER';
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const poolDirection: PoolDirection = direction === 'IMPORT' ? 'IMPORT' : 'EXPORT';
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const numbers =
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cargo === 'CONTAINER'
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? poolDirection === 'IMPORT'
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? CONTAINER_IMPORT_NUMBERS
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: CONTAINER_EXPORT_NUMBERS
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: poolDirection === 'IMPORT'
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? BULK_IMPORT_NUMBERS
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: BULK_EXPORT_NUMBERS;
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return { cargo, direction: poolDirection, numbers };
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}
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/** Lowest pool number not currently in use, or null when the pool is exhausted. */
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export function pickLowestFreeNumber(
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pool: readonly string[],
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usedNumbers: Iterable<string>,
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): string | null {
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const used = new Set(usedNumbers);
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for (const number of pool) {
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if (!used.has(number)) return number;
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}
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return null;
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}
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