add: users service and user schema

Author: SysSn13

models/users.js

@@ -0,0 +1,23 @@
+const mongoose = require("mongoose")
+
+const userSchema = new mongoose.Schema({
+    _id:{
+        type: String
+    },
+    attendedContestsCount:{
+        type: Number,
+        default: 0
+    },
+    rating:{
+        type: Number,
+        default: 1500
+    },
+    globalRanking:{
+        type: Number
+    },
+    lastUpdated:{
+        type: Date,
+        default: Date.now,
+    },
+})
+module.exports = mongoose.model("User",userSchema)

package-lock.json

@@ -11,10 +11,12 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "axios": "^0.21.1",
     "ejs": "^3.1.6",
     "express": "^4.17.1",
     "express-ejs-layouts": "^2.5.0",
-    "mongoose": "^5.12.10"
+    "mongoose": "^5.12.10",
+    "node-fetch": "^2.6.1"
   },
   "_id": "leetcode-rating-predictor@1.0.0",
   "devDependencies": {

package.json

@@ -0,0 +1,56 @@
+const User = require("../models/users")
+const fetch = require('node-fetch');
+const oneDay = 24 * 60 * 60 * 1000;
+const getUserInfo = async function (username) {
+    try {
+        const user = await User.findById(username)
+        if (user === null || Date.now() - user.lastUpdated >= oneDay) {
+            console.log(`fetching user ${username}'s info from leetcode...`)
+            var resp = await fetch("https://leetcode.com/graphql", {
+                "headers": {
+                    "accept": "*/*",
+                    "accept-language": "en-GB,en-US;q=0.9,en;q=0.8,hi;q=0.7,ru;q=0.6",
+                    "content-type": "application/json",
+                    "sec-ch-ua": `" Not A;Brand";v="99", "Chromium";v="90", "Google Chrome";v="90"`,
+                    "sec-ch-ua-mobile": "?0",
+                    "sec-fetch-dest": "empty",
+                    "sec-fetch-mode": "cors",
+                    "sec-fetch-site": "same-origin",
+                    "sec-gpc": "1",
+                    "x-newrelic-id": "UAQDVFVRGwEAXVlbBAg=",
+                },
+                "referrerPolicy": "strict-origin-when-cross-origin",
+                "body": `{"operationName":"getContestRankingData","variables":{"username":"${username}"},"query":"query getContestRankingData($username: String!) {\\n  userContestRanking(username: $username) {\\n    attendedContestsCount\\n    rating\\n    globalRanking\\n    __typename\\n  }\\n}\\n\"}`,
+                "method": "POST",
+                "mode": "cors"
+            })
+            resp = await resp.json()
+            const attenedContestCount = resp.data.userContestRanking.attendedContestsCount
+            const rating = resp.data.userContestRanking.rating
+            const globalRanking = resp.data.userContestRanking.globalRanking
+            var newUser = new User({
+                _id: username,
+                attendedContestsCount: attenedContestCount,
+                rating: rating,
+                globalRanking: globalRanking,
+                lastUpdated: Date.now()
+            })
+
+            if (user === null) {
+                newDate = await newUser.save();
+                console.log("created new user: "+username)
+            } else {
+                await User.findByIdAndUpdate(username, newUser)
+                console.log(`user ${username}'s info updated`)
+            }
+            return newUser
+        } else {
+            return user
+        }
+
+    } catch (err) {
+        console.error(err)
+    }
+}
+
+module.exports = getUserInfo