feat: add student history API endpoint

.github/workflows/format-command.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   format:
-    name: 'Format code via comment'
+    name: "Format code via comment"
     runs-on: ubuntu-latest
     # Only run if it's a PR and the comment contains /format
     if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/format')
@@ -48,7 +48,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: "20"
 
       - name: Run Prettier
         run: npx prettier --write "frontend/**/*.{html,css,js}" "scripts/**/*.js" "server.js"

.github/workflows/prettier-check.yml

@@ -2,9 +2,9 @@ name: Prettier Check
 
 on:
   pull_request:
-    branches: [ main ]
+    branches: [main]
   push:
-    branches: [ main ]
+    branches: [main]
 
 jobs:
   prettier:
@@ -22,7 +22,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: "20"
 
       - name: Run Prettier Requirements Check
         run: npx prettier --check "frontend/**/*.{html,css,js}" "scripts/**/*.js" "server.js"

.github/workflows/stale.yml

@@ -2,7 +2,7 @@ name: Mark stale issues and PRs
 
 on:
   schedule:
-    - cron: '0 0 * * *'
+    - cron: "0 0 * * *"
 
 jobs:
   stale:
@@ -14,9 +14,9 @@ jobs:
       - uses: actions/stale@v9
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
-          stale-issue-message: 'This issue has been inactive for 14 days and has been marked as stale. To keep this issue open, please leave a comment.'
-          stale-pr-message: 'This PR has been inactive for 14 days and has been marked as stale. If you are still working on it, please leave a comment.'
-          stale-issue-label: 'stale'
-          stale-pr-label: 'stale'
+          stale-issue-message: "This issue has been inactive for 14 days and has been marked as stale. To keep this issue open, please leave a comment."
+          stale-pr-message: "This PR has been inactive for 14 days and has been marked as stale. If you are still working on it, please leave a comment."
+          stale-issue-label: "stale"
+          stale-pr-label: "stale"
           days-before-stale: 14
           days-before-close: 5

.github/workflows/sync-leaderboard.yml

@@ -2,7 +2,7 @@ name: Sync Leaderboard Data
 
 on:
   schedule:
-    - cron: '0 */3 * * *'
+    - cron: "0 */3 * * *"
   workflow_dispatch:
 
 concurrency:
@@ -30,7 +30,7 @@ jobs:
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: "20"
 
       - name: Install dependencies
         run: npm install

README.md

@@ -10,9 +10,9 @@ It allows users to register with their LeetCode username and automatically fetch
 
 The goal of this project is to:
 
-- Encourage consistent problem-solving among students  
-- Create a competitive yet motivating environment  
-- Provide visibility into individual coding progress  
+- Encourage consistent problem-solving among students
+- Create a competitive yet motivating environment
+- Provide visibility into individual coding progress
 
 ---
 
@@ -46,6 +46,7 @@ leetcode-ranking/
 ### 1. Fork and clone the repository
 
 First, fork the repository to your GitHub account. Then clone it locally:
+
 ```bash
 git clone https://github.com/YOUR-USERNAME/leetcode-ranking.git
 cd leetcode-ranking
@@ -63,9 +64,9 @@ or
 
 ## Usage
 
-1. Open the registration page  
-2. Enter your name and LeetCode username  
-3. Submit the form  
+1. Open the registration page
+2. Enter your name and LeetCode username
+3. Submit the form
 4. View your ranking on the leaderboard after the next sync
 
 ---
@@ -74,7 +75,7 @@ or
 
 Contributions are welcome.
 
-- Fork the repository  
-- Create a new branch  
-- Make your changes  
-- Submit a Pull Request  
+- Fork the repository
+- Create a new branch
+- Make your changes
+- Submit a Pull Request

package.json

@@ -4,7 +4,8 @@
   "description": "",
   "main": "index.js",
   "scripts": {
-    "dev": "node ./server.js"
+    "start": "node index.js",
+    "dev": "nodemon index.js"
   },
   "repository": {
     "type": "git",

server.js

@@ -1,37 +1,99 @@
 const express = require("express");
 const cors = require("cors");
-const path = require("path");
-const fs = require("fs");
+
 const app = express();
 const PORT = process.env.PORT || 3000;
 
 app.use(cors());
-app.use(express.static(path.join(__dirname, "frontend")));
+app.use(express.static("frontend"));
 
+/* ---------------- HOME ROUTES ---------------- */
 app.get("/", (req, res) => {
-  res.sendFile(path.join(__dirname, "frontend", "index.html"));
+  res.sendFile(__dirname + "/frontend/index.html");
 });
 
 app.get("/leaderboard", (req, res) => {
-  res.sendFile(path.join(__dirname, "frontend", "leaderboard.html"));
+  res.sendFile(__dirname + "/frontend/leaderboard.html");
 });
 
 app.get("/about", (req, res) => {
-  res.sendFile(path.join(__dirname, "frontend", "about.html"));
+  res.sendFile(__dirname + "/frontend/about.html");
 });
 
 app.get("/registration", (req, res) => {
-  res.sendFile(path.join(__dirname, "frontend", "registration.html"));
+  res.sendFile(__dirname + "/frontend/registration.html");
 });
 
 app.get("/uptime", (req, res) => {
   res.json({ status: "Website is running ✅" });
 });
 
+/* ---------------- API: STUDENT HISTORY ---------------- */
+app.get("/api/student/:username", async (req, res) => {
+  const { username } = req.params;
+
+  try {
+    console.log("Fetching history for:", username);
+
+    // 1. Get list of all daily files from GitHub repo
+    const apiURL =
+      "https://api.github.com/repos/codepvg/leetcode-ranking-data/contents/daily?ref=main";
+
+    const response = await fetch(apiURL);
+    const files = await response.json();
+
+    if (!Array.isArray(files)) {
+      return res.status(500).json({
+        error: "GitHub API failed",
+        details: files.message || files,
+      });
+    }
+
+    let history = [];
+
+    // 2. Loop through each file
+    for (const file of files) {
+      if (!file.name.endsWith(".json")) continue;
+
+      const fileRes = await fetch(file.download_url);
+      const data = await fileRes.json();
+
+      const user = data.find((u) => u.id === username);
+
+      if (user) {
+        const date = file.name.split("-").slice(0, 3).join("-");
+
+        history.push({
+          date,
+          easy: user.data.easySolved,
+          medium: user.data.mediumSolved,
+          hard: user.data.hardSolved,
+        });
+      }
+    }
+
+    // 3. Sort by date
+    history.sort((a, b) => new Date(a.date) - new Date(b.date));
+
+    res.json({
+      username,
+      history,
+    });
+  } catch (err) {
+    console.error(err);
+    res.status(500).json({
+      error: "Failed to fetch student history",
+      details: err.message,
+    });
+  }
+});
+
+/* ---------------- 404 ---------------- */
 app.use((req, res) => {
   res.status(404).send("Page not found");
 });
 
+/* ---------------- START ---------------- */
 app.listen(PORT, () => {
   console.log(`Server running at http://localhost:${PORT}`);
 });