🚑️ Wait for client connect

backend/index.js

@@ -21,7 +21,12 @@ const names = require('./names.json');
 
 const client = new MongoClient(process.env.URI, { useUnifiedTopology: true });
 
-app.use(session({
+(async () => {
+  await client.connect();
+  const cardsCollection = client.db(process.env.DB_NAME).collection('cards');
+  const answersCollection = client.db(process.env.DB_NAME).collection('answers');
+
+  app.use(session({
     secret: process.env.SECRET,
     resave: false,
     saveUninitialized: true,
@@ -33,15 +38,12 @@ app.use(session({
       secure: false,
       maxAge: 1000 * 60 * 60 * 24,
     },
-}));
+  }));
 
-client.connect();
-const cardsCollection = client.db(process.env.DB_NAME).collection('cards');
-const answersCollection = client.db(process.env.DB_NAME).collection('answers');
-
-// Выравнивание вероятности
-const dropProb = {}; // Объект хранящий вероятности с которой карта каждого участника отбрасывается
-cardsCollection.aggregate([
+  // Выравнивание вероятности
+  // Объект хранящий вероятности с которой карта каждого участника отбрасывается
+  const dropProb = {};
+  cardsCollection.aggregate([
     {
       $group: {
         _id: '$name',
@@ -50,7 +52,7 @@ cardsCollection.aggregate([
         },
       },
     },
-]).toArray().then((memeCount) => {
+  ]).toArray().then((memeCount) => {
     cardsCollection.countDocuments().then((totalCount) => {
       let quotaTimes;
 
@@ -77,9 +79,9 @@ cardsCollection.aggregate([
         console.log(`${person._id} [${person.count}]: ${dropProb[person._id]}`);
       });
     });
-});
+  });
 
-app.post('/api/auth', async (req, res) => {
+  app.post('/api/auth', async (req, res) => {
     if (req.session.loggedIn) {
       res.status(200).send('Logged in');
     } else {
@@ -96,9 +98,9 @@ app.post('/api/auth', async (req, res) => {
         res.status(500).send();
       }
     }
-});
+  });
 
-app.get('/api/card', async (req, res) => {
+  app.get('/api/card', async (req, res) => {
     async function drawCard() {
       let card;
       // Тянем карты и отбрасываем их в соответствии с их вероятностью отбрасывания
@@ -122,9 +124,9 @@ app.get('/api/card', async (req, res) => {
     } else {
       res.status(403).send();
     }
-});
+  });
 
-app.get('/api/meme', async (req, res) => {
+  app.get('/api/meme', async (req, res) => {
     const amount = Number(req.query.amount) || 1;
     try {
       let cards = await cardsCollection.aggregate([{ $sample: { size: amount } }]).toArray();
@@ -135,9 +137,9 @@ app.get('/api/meme', async (req, res) => {
       console.log(`Error: ${e}`);
       res.status(500).send();
     }
-});
+  });
 
-app.post('/api/answer', async (req, res) => {
+  app.post('/api/answer', async (req, res) => {
     if (req.session.loggedIn) {
       if (req.body.data.id && req.body.data.name) {
         const card = await cardsCollection.findOne({ _id: ObjectId(req.body.data.id) });
@@ -165,9 +167,9 @@ app.post('/api/answer', async (req, res) => {
     } else {
       res.status(403).send();
     }
-});
+  });
 
-app.get('/api/score', (req, res) => {
+  app.get('/api/score', (req, res) => {
     if (req.session.loggedIn) {
       req.session.right = req.session.right || 0;
       req.session.wrong = req.session.wrong || 0;
@@ -179,9 +181,9 @@ app.get('/api/score', (req, res) => {
     } else {
       res.status(403).send();
     }
-});
+  });
 
-app.get('/api/stats', async (req, res) => {
+  app.get('/api/stats', async (req, res) => {
     if (req.session.loggedIn) {
       answersCollection.aggregate([
         {
@@ -207,14 +209,15 @@ app.get('/api/stats', async (req, res) => {
     } else {
       res.status(403).send();
     }
-});
+  });
 
-app.get('/api/options', async (req, res) => {
+  app.get('/api/options', async (req, res) => {
     if (req.session.loggedIn) {
       res.status(200).send(names);
     } else {
       res.status(403).send();
     }
-});
+  });
 
-app.listen(process.env.PORT, () => console.log(`Server started on ${process.env.PORT}`));
+  app.listen(process.env.PORT, () => console.log(`Server started on ${process.env.PORT}`));
+})();