30분 마다 파일에 저장

.gitignore

@@ -1,2 +1,3 @@
 node_modules
-dist
+dist
+ranks.json

package.json

@@ -5,9 +5,9 @@
   "main": "index.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
-    "build": "tsc",
-    "dev": "tsc && node ./dist/app.js",
-    "start": "pm2 start ./dist/app.js --time",
+    "pm2": "pm2 start ./dist/app.js --time",
+    "dev": "tsc && node dist/app.js",
+    "start": "node dist/app.js",
     "send": "scp -r dist package.json package-lock.json jinseok@3.34.97.153:app"
   },
   "keywords": [],

src/app.ts

@@ -1,45 +1,36 @@
 import express from 'express';
-import helmet from 'helmet';
 import type { Request, Response } from 'express';
+import helmet from 'helmet';
 
 import { contains } from './util';
+import { DIFFICULTY, readStoreFromFile, writeStoreToFile } from './store';
+import type { Store, Rank } from './store';
 
 const app = express();
 const port = process.env.PORT || 3000;
 
-interface rank {
-  name: string;
-  sec: number;
-}
-
-const method = ['easy', 'normal', 'hard'] as const;
-
-const store = {
-  easy: [] as rank[],
-  normal: [] as rank[],
-  hard: [] as rank[],
-};
-
 app.use(helmet());
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 
+const store = readStoreFromFile();
+
 app.get('/', (req: Request, res: Response) => {
   res.json(store);
 });
 
 app.get('/get/:diff', (req: Request, res: Response) => {
   const diff = req.params.diff as string;
 
-  if (!contains(method, diff)) return void res.send(false);
+  if (!contains(DIFFICULTY, diff)) return void res.send(false);
 
   res.json(store[diff]);
 });
 
 app.get('/register/:diff', (req: Request, res: Response) => {
   const diff = req.params.diff as string;
 
-  if (!contains(method, diff)) return void res.send(false);
+  if (!contains(DIFFICULTY, diff)) return void res.send(false);
   if (!req.query || !req.query.name || !req.query.sec)
     return void res.send(false);
 
@@ -67,7 +58,7 @@ app.get('/reset', (req: Request, res: Response) => {
 app.get('/delete/:diff', (req: Request, res: Response) => {
   const diff = req.params.diff as string;
 
-  if (!contains(method, diff)) return void res.send(false);
+  if (!contains(DIFFICULTY, diff)) return void res.send(false);
   if (!req.query.name) return void res.send(false);
 
   const name = req.query.name as string;
@@ -77,6 +68,9 @@ app.get('/delete/:diff', (req: Request, res: Response) => {
   res.send(true);
 });
 
+// 30분 마다 파일에 저장
+setInterval(() => writeStoreToFile(store), 1000 * 60 * 30);
+
 app.listen(port, () => {
   console.log(`server is listening...`);
 });

src/store.ts

@@ -0,0 +1,31 @@
+import { readFileSync } from 'fs';
+import { writeFile } from 'fs/promises';
+
+export const DIFFICULTY = ['easy', 'normal', 'hard'] as const;
+const FILE_PATH = './ranks.json';
+
+export interface Rank {
+  name: string;
+  sec: number;
+}
+export interface Store {
+  easy: Rank[];
+  normal: Rank[];
+  hard: Rank[];
+}
+
+export function readStoreFromFile(): Store {
+  const payload = readFileSync(FILE_PATH, 'utf-8');
+  const store = JSON.parse(payload) as Store;
+
+  return store;
+}
+
+export async function writeStoreToFile(store: Store) {
+  try {
+    const payload = JSON.stringify(store);
+    writeFile(FILE_PATH, payload);
+  } catch (err) {
+    throw err;
+  }
+}