intercity fix

apps/edr-freight-api/src/modules/train-scheduling/dto/adjust-schedule-consist.dto.ts

@@ -1,5 +1,16 @@
 import { ApiPropertyOptional } from '@nestjs/swagger';
-import { IsArray, IsOptional, IsUUID } from 'class-validator';
+import { Type } from 'class-transformer';
+import { IsArray, IsOptional, IsUUID, ValidateNested } from 'class-validator';
+
+export class ConsistWagonSwitchDto {
+  @ApiPropertyOptional({ format: 'uuid', description: 'Coupled wagon being taken out of the consist.' })
+  @IsUUID()
+  fromWagonId!: string;
+
+  @ApiPropertyOptional({ format: 'uuid', description: 'AVAILABLE same-type wagon from the current yard that takes its place (and its slot, cargo included).' })
+  @IsUUID()
+  toWagonId!: string;
+}
 
 export class AdjustScheduleConsistDto {
   @ApiPropertyOptional({
@@ -23,4 +34,15 @@ export class AdjustScheduleConsistDto {
   @IsArray()
   @IsUUID('all', { each: true })
   removeWagonIds?: string[];
+
+  @ApiPropertyOptional({
+    type: [ConsistWagonSwitchDto],
+    description:
+      "Wagon swaps: the replacement takes over the outgoing wagon's position AND its slot, so cargo allocations ride the new wagon. This is how a LOADED wagon leaves the train — removal is blocked for it, switching is not. Replacement must be the same wagon type, AVAILABLE, standing in the train's current yard.",
+  })
+  @IsOptional()
+  @IsArray()
+  @ValidateNested({ each: true })
+  @Type(() => ConsistWagonSwitchDto)
+  switches?: ConsistWagonSwitchDto[];
 }