🎨 Backend eslint compliant

backend/index.js

@@ -1,23 +1,25 @@
-const express = require('express')
+const express = require('express');
-const session = require('express-session')
+const session = require('express-session');
-const app = express()
+
-const { MongoClient, ObjectId } = require('mongodb')
+const app = express();
-const MongoStore = require('connect-mongo')
+const { MongoClient, ObjectId } = require('mongodb');
-const cors = require('cors')
+const MongoStore = require('connect-mongo');
-require('dotenv').config()
+const cors = require('cors');
+require('dotenv').config();
 
 app.use(cors({
   origin: [
     process.env.FRONTEND,
   ],
   credentials: true,
-  exposedHeaders: ['set-cookie']
+  exposedHeaders: ['set-cookie'],
-}))
+}));
-app.use(express.json())
+app.use(express.json());
-app.use(express.urlencoded({ extended: true }))
+app.use(express.urlencoded({ extended: true }));
 
-const names = require('./names.json')
+const names = require('./names.json');
-const client = new MongoClient(process.env.URI, { useUnifiedTopology: true })
+
+const client = new MongoClient(process.env.URI, { useUnifiedTopology: true });
 
 app.use(session({
   secret: process.env.SECRET,
@@ -25,195 +27,194 @@ app.use(session({
   saveUninitialized: true,
   store: MongoStore.create({
     client,
-    dbName: process.env.DB_NAME
+    dbName: process.env.DB_NAME,
   }),
   cookie: {
     secure: false,
-    maxAge: 1000 * 60 * 60 * 24
+    maxAge: 1000 * 60 * 60 * 24,
-  }
+  },
-}))
+}));
 
-client.connect()
+client.connect();
-const cardsCollection = client.db(process.env.DB_NAME).collection('cards')
+const cardsCollection = client.db(process.env.DB_NAME).collection('cards');
-const answersCollection = client.db(process.env.DB_NAME).collection('answers')
+const answersCollection = client.db(process.env.DB_NAME).collection('answers');
 
 // Выравнивание вероятности
-let dropProb = {} // Объект хранящий вероятности с которой карта каждого участника отбрасывается
+const dropProb = {}; // Объект хранящий вероятности с которой карта каждого участника отбрасывается
 cardsCollection.aggregate([
   {
-    '$group': {
+    $group: {
-      '_id': '$name', 
+      _id: '$name',
-      'count': {
+      count: {
-        '$sum': 1
+        $sum: 1,
-      }
+      },
-    }
+    },
-  }
+  },
 ]).toArray().then((memeCount) => {
   cardsCollection.countDocuments().then((totalCount) => {
-    let quota, quotaTimes
+    let quotaTimes;
 
-    quota = totalCount/memeCount.length  // Квота мемов на человека
+    const quota = totalCount / memeCount.length; // Квота мемов на человека
-    console.log(totalCount + " мемов всего. Квота: " + quota)
+    console.log(`${totalCount} мемов всего. Квота: ${quota}`);
 
     function activeUsers() {
-      let activeUsers = 0
+      let count = 0;
       memeCount.forEach((person) => {
-        if (person.count > quota/10)
+        if (person.count > quota / 10) { count += 1; }
-          activeUsers++
+      });
-      })
+      return count;
-      return activeUsers
     }
 
     memeCount.forEach((person) => {
       // Во сколько раз превышена квота:
       // (колич. астивных человек в конфе * колич. мемов данного человека / мемов всего)
-      quotaTimes = activeUsers()*person.count/totalCount
+      quotaTimes = activeUsers() * (person.count / totalCount);
       if (quotaTimes > 1) {
-        dropProb[person._id] = 1 - (1/quotaTimes)
+        dropProb[person._id] = 1 - (1 / quotaTimes);
       } else {
-        dropProb[person._id] = 0
+        dropProb[person._id] = 0;
       }
-      console.log(person._id + " ["+person.count+"]: " + dropProb[person._id])
+      console.log(`${person._id} [${person.count}]: ${dropProb[person._id]}`);
-    })
+    });
-  })
+  });
-})
+});
 
 app.post('/api/auth', async (req, res) => {
   if (req.session.loggedIn) {
-    res.status(200).send("Logged in")
+    res.status(200).send('Logged in');
   } else {
     try {
-      const pass = req.body.pass
+      const { pass } = req.body;
       if (pass && pass.toLowerCase() === process.env.PASSWORD) {
-        req.session.loggedIn = true
+        req.session.loggedIn = true;
-        res.status(200).send("Logged in")
+        res.status(200).send('Logged in');
       } else {
-        res.status(401).send("Wrong password")
+        res.status(401).send('Wrong password');
       }
     } catch (e) {
-      console.log("Error: " + e)
+      console.log(`Error: ${e}`);
-      res.status(500).send()
+      res.status(500).send();
     }
   }
-})
+});
 
 app.get('/api/card', async (req, res) => {
   async function drawCard() {
-    let card
+    let card;
     // Тянем карты и отбрасываем их в соответствии с их вероятностью отбрасывания
     do {
+      /* eslint-disable no-await-in-loop */
       card = await cardsCollection.aggregate([
         {
-          $sample: { size: 1 }
+          $sample: { size: 1 },
         }, {
-          $unset: [ 'name', 'link', 'date' ]
+          $unset: ['name', 'link', 'date'],
-        }
+        },
-      ]).toArray()
+      ]).toArray();
-      card = card[0]
+      /* eslint-enable no-await-in-loop */
-    } while (Math.random() < dropProb[card.name])
+      [card] = card;
-    return card
+    } while (Math.random() < dropProb[card.name]);
+    return card;
   }
 
   if (req.session.loggedIn) {
-    res.status(200).send(await drawCard())
+    res.status(200).send(await drawCard());
   } else {
-    res.status(403).send()
+    res.status(403).send();
   }
-})
+});
 
 app.get('/api/meme', async (req, res) => {
-  const amount = Number(req.query.amount) || 1
+  const amount = Number(req.query.amount) || 1;
   try {
-    let cards = await cardsCollection.aggregate([{ $sample: { size: amount } }]).toArray()
+    let cards = await cardsCollection.aggregate([{ $sample: { size: amount } }]).toArray();
     // Удаляем конфиденциальную информацию
-    cards = cards.map((card) => {
+    cards = cards.map((card) => card.image);
-      return card.image
+    res.status(200).send(cards);
-    })
-    res.status(200).send(cards)
   } catch (e) {
-    console.log("Error: " + e)
+    console.log(`Error: ${e}`);
-    res.status(500).send()
+    res.status(500).send();
   }
-})
+});
 
 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) })
+      const card = await cardsCollection.findOne({ _id: ObjectId(req.body.data.id) });
       if (card) {
-        const correct = card.name === req.body.data.name
+        const correct = card.name === req.body.data.name;
         if (correct) {
-          req.session.right++ 
+          req.session.right += 1;
         } else {
-          req.session.wrong++
+          req.session.wrong += 1;
         }
         answersCollection.insertOne({
           correct,
-          selected: req.body.data.name
+          selected: req.body.data.name,
-        })
+        });
         res.status(200).send({
           correct,
-          card
+          card,
-        })
+        });
       } else {
-        res.status(500).send() 
+        res.status(500).send();
       }
     } else {
-      res.status(400).send()  
+      res.status(400).send();
     }
   } else {
-    res.status(403).send()
+    res.status(403).send();
   }
-})
+});
 
 app.get('/api/score', (req, res) => {
   if (req.session.loggedIn) {
-    req.session.right = req.session.right || 0
+    req.session.right = req.session.right || 0;
-    req.session.wrong = req.session.wrong || 0
+    req.session.wrong = req.session.wrong || 0;
     const scoreObj = {
-      "right": req.session.right,
+      right: req.session.right,
-      "wrong": req.session.wrong
+      wrong: req.session.wrong,
-    }
+    };
-    res.status(200).send(scoreObj)
+    res.status(200).send(scoreObj);
   } else {
-    res.status(403).send()
+    res.status(403).send();
   }
-})
+});
 
 app.get('/api/stats', async (req, res) => {
   if (req.session.loggedIn) {
     answersCollection.aggregate([
       {
-        '$group': {
+        $group: {
-          '_id': '$selected', 
+          _id: '$selected',
-          'correct': {
+          correct: {
-            '$sum': {
+            $sum: {
-              '$cond': [
+              $cond: [
-                '$correct', 1, 0
+                '$correct', 1, 0,
-              ]
+              ],
-            }
+            },
           },
-          'wrong': {
+          wrong: {
-            '$sum': {
+            $sum: {
-              '$cond': [
+              $cond: [
-                '$correct', 0, 1
+                '$correct', 0, 1,
-              ]
+              ],
-            }
+            },
-          }
+          },
-        }
+        },
-      }
+      },
-    ]).toArray().then(stats => res.status(200).send(stats))
+    ]).toArray().then((stats) => res.status(200).send(stats));
   } else {
-    res.status(403).send()
+    res.status(403).send();
   }
-})
+});
 
 app.get('/api/options', async (req, res) => {
   if (req.session.loggedIn) {
-    res.status(200).send(names)
+    res.status(200).send(names);
   } else {
-    res.status(403).send()
+    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}`));

backend/package.json

@@ -9,6 +9,8 @@
   "author": "Anatoly Kopyl",
   "license": "ISC",
   "devDependencies": {
+    "eslint": "^8.6.0",
+    "eslint-config-airbnb-base": "^15.0.0",
     "nodemon": "^2.0.7"
   },
   "dependencies": {
@@ -20,5 +22,16 @@
     "express": "^4.17.1",
     "express-session": "^1.17.1",
     "mongodb": "^3.6.5"
+  },
+  "eslintConfig": {
+    "extends": "airbnb-base",
+    "rules": {
+      "no-underscore-dangle": [
+        "off"
+      ],
+      "no-console": [
+        "off"
+      ]
+    }
   }
 }