Leetcode-Flashcards

A collection of scripts and utilities to interact with LeetCode data, including:

• Fetching the most recent accepted submissions from LeetCode.
• Downloading full problem statements and flashcard-like details.
• Updating a local JSON file (solved_problems.json) with submission code.

Table of Contents

• Overview
• Features
• Prerequisites
• Project Structure
• Setup and Installation
• Environment Variables
• Scripts
  • 1. Retrieve Most Recent Accepted Submissions
  • 2. Fetch Problem Details
  • 3. Retrieve Submission Code and Update JSON
• Usage Examples
• Notes & Troubleshooting
• License

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Overview

This project uses the leetcode-query package and Playwright (with stealth plugins) to automate interactions with LeetCode. It aims to help you:

1. Grab your most recent accepted submissions from LeetCode and store them in solved_problems.json.
2. Retrieve detailed problem statements (title, difficulty, content, hints, etc.) for flashcard creation.
3. Enrich your local data with actual code from your successful submissions.

This is especially useful for building a personal knowledge base, studying, or migrating your solutions to GitHub.

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Features

1. Fetch All Accepted Submissions
   Retrieves up to 2000 recent submissions from your account, filters out only those marked "Accepted," and stores the latest submission per problem.

2. Generate JSON Output
   A summary JSON file (solved_problems.json) is created, containing:

   • General summary data (total submissions, total accepted, etc.).
   • An array of objects, each representing the most recent accepted submission details.

3. Download Problem Statement
   Ability to convert the raw HTML problem description into plain text (using html-to-text). This can be saved locally for offline reference.

4. Update Submission Data
   Option to open each submission page via Playwright (headless browser), scrape the actual code, and inject it back into your local JSON.

5. Modular Design
   Each functionality (fetching solutions, problem details, updating JSON, etc.) is housed in separate scripts for clarity and maintainability.

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Prerequisites

• Node.js (v14+ recommended)
• npm or yarn (to install dependencies)
• A valid LeetCode account and your LEETCODE_SESSION_COOKIE.

Note: You must already be logged in to your LeetCode account in a browser to retrieve your session cookie. This approach is only for personal, private use. Do not share your session cookie.

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Project Structure

src ├── leetcode_solutions.js ├── leetcode_solutions.ts ├── problem.js ├── problem.ts ├── problem_details.js ├── problem_details.ts ├── update_json.js └── update_json.ts

• leetcode_solutions.ts: Fetches your recent submissions from LeetCode and writes them to solved_problems.json.
• problem.ts: Fetches and converts problem statements (including example test cases and hints) for a given slug.
• problem_details.ts: Uses Playwright to scrape the code for a given submission ID (via its URL).
• update_json.ts: Reads solved_problems.json, scrapes each submission’s code, and adds it back into the JSON.

Compiled JavaScript files (.js) are produced by the TypeScript compiler from their .ts counterparts.

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