Project implements decorators for modern tools for NodeJS like:
npx create-air-api new
Please Start in development mode and then buildit, if you get an error on dev mode that is because .ts files are not available to the controllers.
- @Controller(baseUrl: string, middleware?: Middleware[]), @Controller(baseUrl: string, routerOptions: RouterOptions, middleware?: Middleware[]) - Registers controller for base url
-
@All(url: string, middleware?: Middleware[]) - Registers all routes
-
@Get(url: string, middleware?: Middleware[]) - Registers get route
-
@Post(url: string, middleware?: Middleware[]) - Registers post route
-
@Put(url: string, middleware?: Middleware[]) - Registers put route
-
@Delete(url: string, middleware?: Middleware[]) - Registers delete route
-
@Patch(url: string, middleware?: Middleware[]) - Registers patch route
-
@Options(url: string, middleware?: Middleware[]) - Registers options route
-
@Head(url: string, middleware?: Middleware[]) - Registers head route
-
@Status(code: number) - Specifies status code for the route
where middleware is the class that implements Middleware
interface.
To use class, import Middleware
interface and implement it, like so:
import { Middleware } from "@/modules/app";
class UserMiddleware implements Middleware {
public use(request: Request, response: Response, next: NextFunction): void {
next();
}
}
or a simple function
function userMiddleware(
request: Request,
response: Response,
next: NextFunction
): void {
next();
}
-
@Request(property?: string) (alias @Req(property?: string)) - Returns express req object or any other object, if name was specified
-
@Response() (alias @Res) - Returns express res object
-
@Next() - Returns express next function
-
@Params(param?: string) - Express req.params object or single param, if param name was specified
-
@Query(param?: string) - Express req.query object or single query param, if query param name was specified
-
@Body(param?: string) - Express req.body object or single body param, if body param name was specified
-
@Headers(property?: string) - Express req.headers object or single headers param, if headers param name was specified
-
@Cookies(param?: string) - Express req.body object or single cookies param, if cookies param name was specified
To add error middleware, that handles unhandled errors simply implement ErrorMiddleware
interface and provide it using ERROR_MIDDLEWARE
token, like so:
import { Container, ErrorMiddleware, ERROR_MIDDLEWARE } from "@/modules/app";
@Injectable()
class ServerErrorMiddleware implements ErrorMiddleware {
public use(
error: Error,
request: Request,
response: Response,
next: NextFunction
) {
next();
}
}
Container.provide([
{ provide: ERROR_MIDDLEWARE, useClass: ServerErrorMiddleware },
]);
or as a function
import { Container, ERROR_MIDDLEWARE } from "@/modules/app";
function serverErrorMiddleware(
error: Error,
request: Request,
response: Response,
next: NextFunction
) {
next();
}
Container.provide([
{ provide: ERROR_MIDDLEWARE, useValue: serverErrorMiddleware },
]);
This module supports dependency injection provided by module. For example, see the full example below.
By Default all file in directory controllers
and services
are auto loaded. Files other than services
with @Injectable()
decorator must be provide in ./src/services/index.ts
//fileContent ./src/services/index.ts
import { DependencyManager } from "@/modules/common/dependencies";
import { ERROR_MIDDLEWARE } from "@/modules/app";
import { ServerErrorHandler } from "@/middlewares";
import { ClassConstructor, ClassProvider } from "@/modules/common/types";
import { Helpers } from "@/lib/helpers";
import { FilesMapper } from "@enjoys/express-utils/file-mapper";
// Add your custom services here
const YourDependency = [Helpers];
export const RegisterDependencies = async () => {
const ServiceArray = await FilesMapper.forRoot(
"./build/src/services/**/*.service.js"
);
const Services: Array<ClassConstructor | ClassProvider> = [
...ServiceArray,
...YourDependency,
{ provide: ERROR_MIDDLEWARE, useClass: ServerErrorHandler },
];
return DependencyManager.imports(Services);
};
import {
Response,
Params,
Controller,
Get,
attachControllers,
Middleware,
} from "@/modules/app";
@Controller("/")
class UsersController {
constructor(private userService: UserService) {}
@Get("/users/:id")
getData(@Response() res, @Params("id") id: string) {
res.send(this.userService.findById(id));
}
}
let app = express();
attachControllers(app, [UsersController]);
app.listen(3000);
You can also attach controllers to express.Router instance. This is useful when you want to namespace all of the routes with a prefix:
import { attachControllers } from "@/modules/app";
const apiRouter = express.Router();
const controllers = await FilesMapper.forRoot("./build/src/contollers/**/*.js");
await attachControllers(apiRouter, controllers);
app.use("/v1/api", apiRouter);
You can also use custom decorators as middleware :
Custom Decorator
import { attachMiddleware } from "@/modules/app";
import { Request, Response, NextFunction } from "express";
export function Access(key: string) {
return function (
target: any,
propertyKey: string,
descriptor: PropertyDescriptor
) {
attachMiddleware(
target,
propertyKey,
(req: Request, res: Response, next: NextFunction) => {
if (["CAN_ACCESS_TEST", "CAN_ACCESS_HOME"].includes(key)) {
next();
} else {
res.send("ACCESS DENIED");
}
}
);
};
}
Controller Code
@Controller("/")
export class MainController {
@Access("CAN_ACCESS_TEST")
@Get("/test")
getB() {
return "You can access the test";
}
@Access("CAN_ACCESS_HOME")
@Get("/home")
getB() {
return "You can access the home";
}
}
Note:- Please use custom decorators before express decorators otherwise system will not detect any controller metadata and your decorator will not invoked.
Will work:
@Access("CAN_ACCESS_TEST")
@Get("/test")
getB() {
return "You can access the test";
}
Will not work:
@Get("/test")
@Access("CAN_ACCESS_TEST")
getB() {
return "You can access the test";
}