75 lines
3.2 KiB
JavaScript
75 lines
3.2 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.ClassSerializerInterceptor = void 0;
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const tslib_1 = require("tslib");
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const operators_1 = require("rxjs/operators");
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const core_1 = require("../decorators/core");
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const file_stream_1 = require("../file-stream");
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const load_package_util_1 = require("../utils/load-package.util");
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const shared_utils_1 = require("../utils/shared.utils");
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const class_serializer_constants_1 = require("./class-serializer.constants");
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let classTransformer = {};
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// NOTE (external)
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// We need to deduplicate them here due to the circular dependency
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// between core and common packages
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const REFLECTOR = 'Reflector';
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/**
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* @publicApi
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*/
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let ClassSerializerInterceptor = class ClassSerializerInterceptor {
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constructor(reflector, defaultOptions = {}) {
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var _a;
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this.reflector = reflector;
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this.defaultOptions = defaultOptions;
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classTransformer =
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(_a = defaultOptions === null || defaultOptions === void 0 ? void 0 : defaultOptions.transformerPackage) !== null && _a !== void 0 ? _a : (0, load_package_util_1.loadPackage)('class-transformer', 'ClassSerializerInterceptor', () => require('class-transformer'));
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if (!(defaultOptions === null || defaultOptions === void 0 ? void 0 : defaultOptions.transformerPackage)) {
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require('class-transformer');
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}
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}
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intercept(context, next) {
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const contextOptions = this.getContextOptions(context);
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const options = Object.assign(Object.assign({}, this.defaultOptions), contextOptions);
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return next
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.handle()
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.pipe((0, operators_1.map)((res) => this.serialize(res, options)));
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}
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/**
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* Serializes responses that are non-null objects nor streamable files.
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*/
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serialize(response, options) {
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if (!(0, shared_utils_1.isObject)(response) || response instanceof file_stream_1.StreamableFile) {
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return response;
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}
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return Array.isArray(response)
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? response.map(item => this.transformToPlain(item, options))
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: this.transformToPlain(response, options);
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}
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transformToPlain(plainOrClass, options) {
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if (!plainOrClass) {
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return plainOrClass;
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}
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if (!options.type) {
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return classTransformer.classToPlain(plainOrClass, options);
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}
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if (plainOrClass instanceof options.type) {
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return classTransformer.classToPlain(plainOrClass, options);
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}
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const instance = classTransformer.plainToClass(options.type, plainOrClass);
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return classTransformer.classToPlain(instance, options);
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}
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getContextOptions(context) {
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return this.reflector.getAllAndOverride(class_serializer_constants_1.CLASS_SERIALIZER_OPTIONS, [
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context.getHandler(),
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context.getClass(),
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]);
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}
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};
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ClassSerializerInterceptor = tslib_1.__decorate([
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(0, core_1.Injectable)(),
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tslib_1.__param(0, (0, core_1.Inject)(REFLECTOR)),
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tslib_1.__param(1, (0, core_1.Optional)()),
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tslib_1.__metadata("design:paramtypes", [Object, Object])
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], ClassSerializerInterceptor);
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exports.ClassSerializerInterceptor = ClassSerializerInterceptor;
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