feat: add backend

apps/server/middlewares/index.ts

@@ -0,0 +1,10 @@
+import { Router } from './router.ts';
+import { ResponseTime } from './responseTime.ts';
+import type Koa from 'koa';
+
+export function registerMiddlewares(app: Koa) {
+  const router = new Router();
+  const responseTime = new ResponseTime();
+  responseTime.apply(app);
+  router.apply(app);
+}

apps/server/middlewares/responseTime.ts

@@ -0,0 +1,13 @@
+import type { Middleware } from './types.ts';
+import type Koa from 'koa';
+
+export class ResponseTime implements Middleware {
+  apply(app: Koa): void {
+    app.use(async (ctx, next) => {
+      const start = Date.now();
+      await next();
+      const ms = Date.now() - start;
+      ctx.set('X-Response-Time', `${ms}ms`);
+    });
+  }
+}

apps/server/middlewares/router.ts

@@ -0,0 +1,19 @@
+import KoaRouter from '@koa/router';
+import type Koa from 'koa';
+import type { Middleware } from './types.ts';
+import * as application from '../controllers/application.ts';
+
+export class Router implements Middleware {
+  private router: KoaRouter;
+  constructor() {
+    this.router = new KoaRouter({
+      prefix: '/api',
+    });
+    this.router.get('/application/list', application.list);
+  }
+
+  apply(app: Koa) {
+    app.use(this.router.routes());
+    app.use(this.router.allowedMethods());
+  }
+}

apps/server/middlewares/types.ts

@@ -0,0 +1,5 @@
+import type Koa  from 'koa';
+
+export abstract class Middleware {
+  abstract apply(app: Koa, options?: unknown): void;
+}