import { ApiPropertyOptional } from '@nestjs/swagger';
import { IsISO8601, IsOptional } from 'class-validator';

/**
 * A station loading/unloading window click. `at` omitted = "now" (the button
 * click); `at` given = record or correct the timestamp after the fact — same
 * endpoint, same permission.
 */
export class StationWorkDto {
  @ApiPropertyOptional({ description: 'ISO timestamp; omitted = now. Never in the future.' })
  @IsOptional()
  @IsISO8601()
  at?: string;
}