start

app.js

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+import Koa from 'koa';
+import bodyParser from 'koa-bodyparser';
+import cors from 'koa-cors';
+import http from 'http';
+import { DBModel } from './models/index.js';
+import registerRoutes from './routes/index.js';
+import ResponseUtil from './utils/api_response.js';
+
+class APP {
+  constructor() {
+    this.app = new Koa();
+    this.setupDB();
+    this.setupMiddleware();
+    this.setupRoutes();
+    this.setupFallback();
+  }
+
+  setupDB() {
+    DBModel.init();
+  }
+
+  setupMiddleware() {
+    this.app.use(cors());
+    this.app.use(bodyParser());
+
+    this.app.use(async (ctx, next) => {
+      const start = Date.now();
+      await next();
+      const ms = Date.now() - start;
+      console.log(`${ctx.method} ${ctx.url} - ${ctx.status} - ${ms}ms`);
+    });
+  }
+
+  setupRoutes() {
+    this.app.use(async (ctx, next) => {
+      if (ctx.path === '/') {
+        ResponseUtil.success(ctx, { name: 'attendant-api', version: '1.0.0' });
+        return;
+      }
+      await next();
+    });
+
+    this.app.use(registerRoutes.getRoutes());
+    this.app._router = registerRoutes.router;
+  }
+
+  setupFallback() {
+    this.app.use(async (ctx) => {
+      ctx.status = 404;
+      ctx.body = { code: 404, msg: 'Not Found' };
+    });
+  }
+
+  start(port) {
+    this.server = http.createServer(this.app.callback());
+    this.server.listen(port, () => {
+      console.log(`Server: running on http://localhost:${port}`);
+    });
+  }
+
+  stop() {
+    if (this.server) {
+      this.server.close();
+      this.server = null;
+      console.log('Server stopped');
+    }
+  }
+
+  static createKoaApp() {
+    const instance = new APP();
+    return instance.app;
+  }
+}
+
+export { APP };