@elsikora/nestjs-crud-automator/dist/esm/utility/api/route/response/serialize.utility.js

A library for automating the creation of CRUD operations in NestJS.

import { HttpStatus } from '@nestjs/common';
import '@nestjs/swagger';
import '@nestjs/swagger/dist/constants.js';
import { ErrorException } from '../../../error/exception.utility.js';
import { ApiRoutePrepareDiscriminatedDtoPayload } from '../discriminator/prepare-payload.utility.js';
import { ApiRouteResolveDiscriminatedDto } from '../discriminator/resolve-dto.utility.js';
import { plainToInstance } from 'class-transformer';

/**
 * Serializes a route response using the route metadata response DTO configuration.
 * @template E - Entity type represented by the route metadata.
 * @template R - Response value type.
 * @param {Pick<IApiRouteMetadata<E>, "response">} metadata - Route metadata containing response serialization settings.
 * @param {R} response - Response value to serialize.
 * @returns {R} Serialized response value.
 */
function ApiRouteSerializeResponse(metadata, response) {
    if (!metadata.response?.serialization?.isEnabled || !metadata.response.type || metadata.response.status === HttpStatus.NO_CONTENT) {
        return response;
    }
    if (Array.isArray(metadata.response.type)) {
        if (!metadata.response.discriminator) {
            throw ErrorException("ApiRouteSerializeResponse error: response.discriminator is required when response.type is an array");
        }
        const discriminatedResponseProperties = {
            discriminator: metadata.response.discriminator,
            type: metadata.response.type,
        };
        const selectedDto = ApiRouteResolveDiscriminatedDto(discriminatedResponseProperties, response, "ApiRouteSerializeResponse");
        return plainToInstance(selectedDto, ApiRoutePrepareDiscriminatedDtoPayload(discriminatedResponseProperties, response), {
            // eslint-disable-next-line @elsikora/typescript/naming-convention
            excludeExtraneousValues: true,
            strategy: "excludeAll",
        });
    }
    return plainToInstance(metadata.response.type, response, {
        // eslint-disable-next-line @elsikora/typescript/naming-convention
        excludeExtraneousValues: true,
        strategy: "excludeAll",
    });
}

export { ApiRouteSerializeResponse };
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