api part 1

Author: Adarshsingh2k

app.js

@@ -0,0 +1,17 @@
+const express = require('express')
+const app = express();
+const cors = require('cors')
+
+app.use(cors({
+    origin: '*'
+}))
+
+let leet = require('./leetcode');
+app.get('/', (req, res) => {
+    res.send(`<b>API URL:</b> https://localhost:3000/<b style="color:crimson;">yourLeetcodeUsername</b>`)
+});
+app.get('/:id', leet.leetcode);
+
+app.listen(3000, () => {
+    console.log(`App is running on port 3000`);
+});

leetcode.js

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+//graphql query
+
+
+const fetch = require("node-fetch");
+
+
+const query = `
+  query getUserProfile($username: String!) {
+    allQuestionsCount {
+      difficulty
+      count
+    }
+    matchedUser(username: $username) {
+      contributions {
+        points
+      }
+      profile {
+        reputation
+        ranking
+      }
+      submissionCalendar
+      submitStats {
+        acSubmissionNum {
+          difficulty
+          count
+          submissions
+        }
+        totalSubmissionNum {
+          difficulty
+          count
+          submissions
+        }
+      }
+    }
+  }
+`;
+
+
+// format data 
+const formatData = (data) => {
+    let sendData =  {
+        totalSolved: data.matchedUser.submitStats.acSubmissionNum[0].count,
+        totalSubmissions:  data.matchedUser.submitStats.totalSubmissionNum,
+        totalQuestions: data.allQuestionsCount[0].count,
+        easySolved: data.matchedUser.submitStats.acSubmissionNum[1].count,
+        totalEasy: data.allQuestionsCount[1].count,
+        mediumSolved: data.matchedUser.submitStats.acSubmissionNum[2].count,
+        totalMedium: data.allQuestionsCount[2].count,
+        hardSolved: data.matchedUser.submitStats.acSubmissionNum[3].count,
+        totalHard: data.allQuestionsCount[3].count,
+        ranking: data.matchedUser.profile.ranking,
+        contributionPoint: data.matchedUser.contributions.points,
+        reputation: data.matchedUser.profile.reputation,
+        submissionCalendar: JSON.parse(data.matchedUser.submissionCalendar)
+    }
+    return sendData;
+}
+
+//fetching the data
+exports.leetcode = (req, res) => {
+    let user = req.params.id;
+    fetch('https://leetcode.com/graphql', {
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/json',
+            'Referer': 'https://leetcode.com'
+        }, 
+        body: JSON.stringify({query: query, variables: {username: user}}),
+    
+    })
+    .then(result => result.json())
+    .then(data => {
+      if(data.errors){
+        res.send(data);
+      }else {
+        res.send(formatData(data.data));
+      }
+    })
+    .catch(err=>{
+        console.error('Error', err);
+        res.send(err);
+    });
+}