@nestjs/core
Version:
Nest - modern, fast, powerful node.js web framework (@core)
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JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const common_1 = require("@nestjs/common");
const constants_1 = require("@nestjs/common/constants");
const route_paramtypes_enum_1 = require("@nestjs/common/enums/route-paramtypes.enum");
const shared_utils_1 = require("@nestjs/common/utils/shared.utils");
const constants_2 = require("../guards/constants");
const context_utils_1 = require("../helpers/context-utils");
const handler_metadata_storage_1 = require("../helpers/handler-metadata-storage");
const constants_3 = require("../injector/constants");
const router_response_controller_1 = require("./router-response-controller");
class RouterExecutionContext {
constructor(paramsFactory, pipesContextCreator, pipesConsumer, guardsContextCreator, guardsConsumer, interceptorsContextCreator, interceptorsConsumer, applicationRef) {
this.paramsFactory = paramsFactory;
this.pipesContextCreator = pipesContextCreator;
this.pipesConsumer = pipesConsumer;
this.guardsContextCreator = guardsContextCreator;
this.guardsConsumer = guardsConsumer;
this.interceptorsContextCreator = interceptorsContextCreator;
this.interceptorsConsumer = interceptorsConsumer;
this.applicationRef = applicationRef;
this.handlerMetadataStorage = new handler_metadata_storage_1.HandlerMetadataStorage();
this.contextUtils = new context_utils_1.ContextUtils();
this.responseController = new router_response_controller_1.RouterResponseController(applicationRef);
}
create(instance, callback, methodName, module, requestMethod, contextId = constants_3.STATIC_CONTEXT, inquirerId) {
const { argsLength, fnHandleResponse, paramtypes, getParamsMetadata, httpStatusCode, responseHeaders, hasCustomHeaders, } = this.getMetadata(instance, callback, methodName, module, requestMethod);
const paramsOptions = this.contextUtils.mergeParamsMetatypes(getParamsMetadata(module, contextId, inquirerId), paramtypes);
const pipes = this.pipesContextCreator.create(instance, callback, module, contextId, inquirerId);
const guards = this.guardsContextCreator.create(instance, callback, module, contextId, inquirerId);
const interceptors = this.interceptorsContextCreator.create(instance, callback, module, contextId, inquirerId);
const fnCanActivate = this.createGuardsFn(guards, instance, callback);
const fnApplyPipes = this.createPipesFn(pipes, paramsOptions);
const handler = (args, req, res, next) => async () => {
fnApplyPipes && (await fnApplyPipes(args, req, res, next));
return callback.apply(instance, args);
};
return async (req, res, next) => {
const args = this.contextUtils.createNullArray(argsLength);
fnCanActivate && (await fnCanActivate([req, res, next]));
this.responseController.setStatus(res, httpStatusCode);
hasCustomHeaders &&
this.responseController.setHeaders(res, responseHeaders);
const result = await this.interceptorsConsumer.intercept(interceptors, [req, res, next], instance, callback, handler(args, req, res, next));
await fnHandleResponse(result, res);
};
}
getMetadata(instance, callback, methodName, module, requestMethod) {
const cacheMetadata = this.handlerMetadataStorage.get(instance, methodName);
if (cacheMetadata) {
return cacheMetadata;
}
const metadata = this.contextUtils.reflectCallbackMetadata(instance, methodName, constants_1.ROUTE_ARGS_METADATA) || {};
const keys = Object.keys(metadata);
const argsLength = this.contextUtils.getArgumentsLength(keys, metadata);
const paramtypes = this.contextUtils.reflectCallbackParamtypes(instance, methodName);
const getParamsMetadata = (moduleKey, contextId = constants_3.STATIC_CONTEXT, inquirerId) => this.exchangeKeysForValues(keys, metadata, moduleKey, contextId, inquirerId);
const paramsMetadata = getParamsMetadata(module);
const isResponseHandled = paramsMetadata.some(({ type }) => type === route_paramtypes_enum_1.RouteParamtypes.RESPONSE || type === route_paramtypes_enum_1.RouteParamtypes.NEXT);
const httpRedirectResponse = this.reflectRedirect(callback);
const fnHandleResponse = this.createHandleResponseFn(callback, isResponseHandled, httpRedirectResponse);
const httpCode = this.reflectHttpStatusCode(callback);
const httpStatusCode = httpCode
? httpCode
: this.responseController.getStatusByMethod(requestMethod);
const responseHeaders = this.reflectResponseHeaders(callback);
const hasCustomHeaders = !shared_utils_1.isEmpty(responseHeaders);
const handlerMetadata = {
argsLength,
fnHandleResponse,
paramtypes,
getParamsMetadata,
httpStatusCode,
hasCustomHeaders,
responseHeaders,
};
this.handlerMetadataStorage.set(instance, methodName, handlerMetadata);
return handlerMetadata;
}
reflectRedirect(callback) {
return Reflect.getMetadata(constants_1.REDIRECT_METADATA, callback);
}
reflectHttpStatusCode(callback) {
return Reflect.getMetadata(constants_1.HTTP_CODE_METADATA, callback);
}
reflectRenderTemplate(callback) {
return Reflect.getMetadata(constants_1.RENDER_METADATA, callback);
}
reflectResponseHeaders(callback) {
return Reflect.getMetadata(constants_1.HEADERS_METADATA, callback) || [];
}
exchangeKeysForValues(keys, metadata, moduleContext, contextId = constants_3.STATIC_CONTEXT, inquirerId) {
this.pipesContextCreator.setModuleContext(moduleContext);
return keys.map(key => {
const { index, data, pipes: pipesCollection } = metadata[key];
const pipes = this.pipesContextCreator.createConcreteContext(pipesCollection, contextId, inquirerId);
const type = this.contextUtils.mapParamType(key);
if (key.includes(constants_1.CUSTOM_ROUTE_AGRS_METADATA)) {
const { factory } = metadata[key];
const customExtractValue = this.getCustomFactory(factory, data);
return { index, extractValue: customExtractValue, type, data, pipes };
}
const numericType = Number(type);
const extractValue = (req, res, next) => this.paramsFactory.exchangeKeyForValue(numericType, data, {
req,
res,
next,
});
return { index, extractValue, type: numericType, data, pipes };
});
}
getCustomFactory(factory, data) {
return shared_utils_1.isFunction(factory)
? (req, res, next) => factory(data, req)
: () => null;
}
async getParamValue(value, { metatype, type, data, }, pipes) {
if ((type === route_paramtypes_enum_1.RouteParamtypes.BODY ||
type === route_paramtypes_enum_1.RouteParamtypes.QUERY ||
type === route_paramtypes_enum_1.RouteParamtypes.PARAM ||
shared_utils_1.isString(type)) &&
!shared_utils_1.isEmpty(pipes)) {
return this.pipesConsumer.apply(value, { metatype, type, data }, pipes);
}
return value;
}
createGuardsFn(guards, instance, callback) {
const canActivateFn = async (args) => {
const canActivate = await this.guardsConsumer.tryActivate(guards, args, instance, callback);
if (!canActivate) {
throw new common_1.ForbiddenException(constants_2.FORBIDDEN_MESSAGE);
}
};
return guards.length ? canActivateFn : null;
}
createPipesFn(pipes, paramsOptions) {
const pipesFn = async (args, req, res, next) => {
await Promise.all(paramsOptions.map(async (param) => {
const { index, extractValue, type, data, metatype, pipes: paramPipes, } = param;
const value = extractValue(req, res, next);
args[index] = await this.getParamValue(value, { metatype, type, data }, pipes.concat(paramPipes));
}));
};
return paramsOptions.length ? pipesFn : null;
}
createHandleResponseFn(callback, isResponseHandled, redirectResponse, httpStatusCode) {
const renderTemplate = this.reflectRenderTemplate(callback);
if (renderTemplate) {
return async (result, res) => {
await this.responseController.render(result, res, renderTemplate);
};
}
if (redirectResponse && redirectResponse.url) {
return async (result, res) => {
await this.responseController.redirect(result, res, redirectResponse);
};
}
return async (result, res) => {
result = await this.responseController.transformToResult(result);
!isResponseHandled &&
(await this.responseController.apply(result, res, httpStatusCode));
};
}
}
exports.RouterExecutionContext = RouterExecutionContext;