tariffs/src/server/router.ts

import type {
  FastifyInstance,
  RouteHandlerMethod,
  RawRequestDefaultExpression,
  RawReplyDefaultExpression,
  RouteShorthandOptions,
  FastifyPluginOptions,
  RawServerDefault,
  RouteGenericInterface,
} from "fastify";

type HandlerMethod<T extends RouteGenericInterface> = RouteHandlerMethod<
  RawServerDefault,
  RawRequestDefaultExpression<RawServerDefault>,
  RawReplyDefaultExpression<RawServerDefault>,
  T
>;

export class Router {
  private fastifyInstance: FastifyInstance;

  constructor(fastifyInstance: FastifyInstance) {
    this.fastifyInstance = fastifyInstance;
  }

  public group = (path: string, combineRoutes: (router: Router) => void) => {
    this.fastifyInstance.register(
      (server: FastifyInstance, opts: FastifyPluginOptions, done: () => void) => {
        const router = new Router(server);

        combineRoutes(router);
        done();
      },
      { prefix: path }
    );
  };

  public get = <T extends RouteGenericInterface>(
    path: string,
    handler: HandlerMethod<T>,
    options: RouteShorthandOptions
  ) => {
    this.fastifyInstance.get(path, options, handler);
  };

  public post = <T extends RouteGenericInterface>(
    path: string,
    handler: HandlerMethod<T>,
    options: RouteShorthandOptions
  ) => {
    this.fastifyInstance.post(path, options, handler);
  };

  public put = <T extends RouteGenericInterface>(
    path: string,
    handler: HandlerMethod<T>,
    options: RouteShorthandOptions
  ) => {
    this.fastifyInstance.put(path, options, handler);
  };

  public patch = <T extends RouteGenericInterface>(
    path: string,
    handler: HandlerMethod<T>,
    options: RouteShorthandOptions
  ) => {
    this.fastifyInstance.patch(path, options, handler);
  };

  public delete = <T extends RouteGenericInterface>(
    path: string,
    handler: HandlerMethod<T>,
    options: RouteShorthandOptions
  ) => {
    this.fastifyInstance.delete(path, options, handler);
  };
}