Harden inquiry participant edge cases

src/common/dto/inquiry-participants.dto.ts

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+import { ApiProperty, ApiPropertyOptional } from "@nestjs/swagger";
+import { Type } from "class-transformer";
+import {
+  IsBoolean,
+  IsEnum,
+  IsNotEmpty,
+  IsOptional,
+  IsString,
+  MaxLength,
+  ValidateNested,
+} from "class-validator";
+
+export enum InquiryParticipantRole {
+  DRIVER = "DRIVER",
+  VEHICLE_OWNER = "VEHICLE_OWNER",
+  THIRD_PARTY_POLICYHOLDER = "THIRD_PARTY_POLICYHOLDER",
+  CAR_BODY_POLICYHOLDER = "CAR_BODY_POLICYHOLDER",
+}
+
+export enum VehicleRegistrationState {
+  CURRENT = "CURRENT",
+  RECENTLY_TRANSFERRED = "RECENTLY_TRANSFERRED",
+}
+
+export class InquiryPlateDto {
+  @ApiProperty({ example: "44" })
+  @IsString()
+  @IsNotEmpty()
+  leftDigits: string;
+
+  @ApiProperty({ example: "ب" })
+  @IsString()
+  @IsNotEmpty()
+  centerAlphabet: string;
+
+  @ApiProperty({ example: "111" })
+  @IsString()
+  @IsNotEmpty()
+  centerDigits: string;
+
+  @ApiProperty({ example: "22" })
+  @IsString()
+  @IsNotEmpty()
+  ir: string;
+}
+
+export class InquiryParticipantInputDto {
+  @ApiPropertyOptional({ enum: InquiryParticipantRole })
+  @IsOptional()
+  @IsEnum(InquiryParticipantRole)
+  sameAs?: InquiryParticipantRole;
+
+  @ApiPropertyOptional({
+    description:
+      "Only for the damaged party's third-party policyholder when the identity is genuinely unknown.",
+  })
+  @IsOptional()
+  @IsBoolean()
+  unknown?: boolean;
+
+  @ApiPropertyOptional({ example: "0012345678" })
+  @IsOptional()
+  @IsString()
+  nationalCode?: string;
+
+  @ApiPropertyOptional({ example: "1370/01/01" })
+  @IsOptional()
+  birthday?: string | number;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsString()
+  fullName?: string;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsString()
+  phoneNumber?: string;
+
+  @ApiPropertyOptional({
+    description: "Required for a driver who has a licence.",
+  })
+  @IsOptional()
+  @IsBoolean()
+  hasDrivingLicense?: boolean;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsString()
+  licenseNumber?: string;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsString()
+  licenseType?: string;
+}
+
+export class InquiryVehicleInputDto {
+  @ApiPropertyOptional({
+    enum: VehicleRegistrationState,
+    default: VehicleRegistrationState.CURRENT,
+  })
+  @IsOptional()
+  @IsEnum(VehicleRegistrationState)
+  registrationState?: VehicleRegistrationState;
+
+  @ApiProperty({ type: InquiryPlateDto })
+  @ValidateNested()
+  @Type(() => InquiryPlateDto)
+  currentPlate: InquiryPlateDto;
+
+  @ApiPropertyOptional({ type: InquiryPlateDto })
+  @IsOptional()
+  @ValidateNested()
+  @Type(() => InquiryPlateDto)
+  previousPlate?: InquiryPlateDto;
+
+  @ApiPropertyOptional({ maxLength: 17, example: "NAAM01E15HK123456" })
+  @IsOptional()
+  @IsString()
+  @MaxLength(17)
+  vin?: string;
+}
+
+/** New role-complete contract mixed into every inquiry DTO. Legacy fields remain during rollout. */
+export class InquiryParticipantFieldsDto {
+  @ApiPropertyOptional({ type: InquiryParticipantInputDto })
+  @IsOptional()
+  @ValidateNested()
+  @Type(() => InquiryParticipantInputDto)
+  driver?: InquiryParticipantInputDto;
+
+  @ApiPropertyOptional({ type: InquiryParticipantInputDto })
+  @IsOptional()
+  @ValidateNested()
+  @Type(() => InquiryParticipantInputDto)
+  vehicleOwner?: InquiryParticipantInputDto;
+
+  @ApiPropertyOptional({ type: InquiryParticipantInputDto })
+  @IsOptional()
+  @ValidateNested()
+  @Type(() => InquiryParticipantInputDto)
+  thirdPartyPolicyholder?: InquiryParticipantInputDto;
+
+  @ApiPropertyOptional({ type: InquiryParticipantInputDto })
+  @IsOptional()
+  @ValidateNested()
+  @Type(() => InquiryParticipantInputDto)
+  carBodyPolicyholder?: InquiryParticipantInputDto;
+
+  @ApiPropertyOptional({ type: InquiryVehicleInputDto })
+  @IsOptional()
+  @ValidateNested()
+  @Type(() => InquiryVehicleInputDto)
+  vehicle?: InquiryVehicleInputDto;
+}