Update README generation and add GitHub Actions workflow

.github/workflows/readme.yml

@@ -0,0 +1,37 @@
+name: Generate Table of Contents
+
+on:
+  push:
+    branches: ["main"]
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 * * *'  # Runs at 00:00 UTC every day
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: "20"
+
+      - name: Install dependencies
+        run: npm install
+        working-directory: scripts
+
+      - name: Run index.js
+        run: node index.js
+        working-directory: scripts
+
+      - name: Commit and push if changed
+        run: |
+          git config --global user.email "actions@github.com"
+          git config --global user.name "GitHub Actions"
+          git add README.md
+          git diff --quiet && git diff --staged --quiet || (git commit -m "Update README with table of contents" && git push)
+        working-directory: ${{ github.workspace }}

README.md

@@ -33,4 +33,11 @@
     <a href="https://www.instagram.com/yashksaini.codes/"> <img src="https://img.shields.io/badge/Instagram-%23FF006E.svg?style=for-the-badge&logo=Instagram&logoColor=white"> </a>
     <a href="https://twitter.com/EasycodesDev"> <img src="https://img.shields.io/badge/X-%23000000.svg?style=for-the-badge&logo=X&logoColor=white"> </a>
 </div>
+<br>
+
+## Solutions
+
+<!-- SOLUTIONS TABLE BEGIN -->
+<!-- SOLUTIONS TABLE END -->
+
 <br>

_config.yml

@@ -1,5 +1,5 @@
 title: September-Leetcode-Daily-2024
-description: A Reposotroy to maintain my September Leetcode Coding session 2024
+description: A Repository to maintain my September Leetcode Coding session 2024
 show_downloads: false
 google_analytics:
 theme: jekyll-theme-hacker

scripts/index.js

@@ -0,0 +1,76 @@
+import fetch from "node-fetch";
+import fs from "fs";
+
+const toc = async () => {
+  // Fetch from the GitHubAPI
+  const data = await fetch(
+    "https://api.github.com/repos/yashksaini-coder/September-Leetcode-Daily-2024/contents?ref=main"
+  )
+    .then((response) => response.json())
+    .then((data) => data);
+
+  var arr = Object.values(data);
+
+  // Filter out the folders
+  const folders = arr.filter(
+    (item) => item.type === "dir" && item.name[0] !== "."
+  );
+
+  // Make a table of contents
+  var toc = [];
+  folders.forEach((item) => {
+    var num = parseInt(item.name.split("-")[0]);
+    toc[num] = item.name;
+  });
+
+  // Sort toc by key
+  var sorted = Object.keys(toc)
+    .sort()
+    .reduce((obj, key) => {
+      obj[key] = toc[key];
+      return obj;
+    }, {});
+
+  // Generate the table of solutions
+  let solutionsTable = `
+<!-- SOLUTIONS TABLE BEGIN -->
+| Leetcode Problem | Problem Statement | Solution |
+|---:|:-----|:----:|
+`;
+  for (var key in sorted) {
+    var str = sorted[key].split("-");
+    var name = str.slice(1).join(" ");
+    var num = key;
+    solutionsTable += `| [${num}](https://leetcode.com/problems/${str.slice(1).join("-")}/) | ${name} | [Solution](./${str.join("-")}/${str.join("-")}.java) |\n`;
+  }
+  solutionsTable += "<!-- SOLUTIONS TABLE END -->";
+
+  // Read the existing README content
+  let readmeContent = fs.readFileSync("README.md", "utf8");
+
+  // Checking whether the solutions table already exists
+  if (readmeContent.includes("<!-- SOLUTIONS TABLE BEGIN -->")) {
+    // Replacing the existing table
+    readmeContent = readmeContent.replace(
+      /<!-- SOLUTIONS TABLE BEGIN -->[\s\S]*<!-- SOLUTIONS TABLE END -->/,
+      solutionsTable
+    );
+  } else {
+    // Find the "## Solutions" heading and insert the table after it. It is necessary the heading matches exactly.
+    const solutionsHeading = "## Solutions";
+    const headingIndex = readmeContent.indexOf(solutionsHeading);
+    if (headingIndex !== -1) {
+      const insertIndex = headingIndex + solutionsHeading.length;
+      readmeContent = readmeContent.slice(0, insertIndex) + "\n\n" + solutionsTable + readmeContent.slice(insertIndex);
+    } else {
+      console.error("Could not find '## Solutions' heading in README.md");
+      return;
+    }
+  }
+
+  // Write the updated content back to README.md
+  fs.writeFileSync("README.md", readmeContent);
+  console.log("README.md has been updated with the solutions table!");
+};
+
+toc();

scripts/package.json

@@ -0,0 +1,6 @@
+{
+  "type": "module",
+  "dependencies": {
+    "node-fetch": "^3.2.0"
+  }
+}