Commit your LeetCode submission to Github! Usage: This is a Tampermonkey script. Open a submission detail page and execute this script from the context menu.

leetcode-to-github.js

// ==UserScript==
// @name         LeetCode to Github
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Commit your LeetCode submission to Github! Usage: Open a submission detail page and execute this script from the context menu.
// @author       Zhiyong Pan
// @match        https://leetcode.com/submissions/detail/*
// @match        https://leetcode.com/contest/*/submissions/detail/*
// @grant        none
// @require      http://code.jquery.com/jquery-1.12.4.min.js
// @require      https://cdn.jsdelivr.net/npm/js-base64@3.7.2/base64.min.js
// @run-at       context-menu
// ==/UserScript==

(function() {
    'use strict';

    const $ = window.$; // avoid eslint complaining "$ not defined"

    // ----------- GitHub configurations -------------
    // assume the global variables have been defined by another user script.
    const GITHUB_PERSONAL_ACCESS_TOKEN = window.GITHUB_PERSONAL_ACCESS_TOKEN;
    const owner = window.GITHUB_OWNER;
    const repo = window.GITHUB_REPO;
    const author = window.AUTHOR; // used to generate file comment.


    // Samples of problme link hrefs:
    // /problems/check-if-number-is-a-sum-of-powers-of-three/
    // https://leetcode.com/contest/biweekly-contest-47/problems/check-if-number-is-a-sum-of-powers-of-three/
    // https://leetcode.com/explore/item/3755  (this is when jumping from daily challenge
    let problemLink = $('a.inline-wrap[href*="/problems/"]');
    if (problemLink.size() == 0) {
        problemLink = $('a[href*="/explore/item/"]');
    }

    const title = problemLink[0].innerText;
    const titleSlug = title.toLowerCase().replace(/[^\da-z ]/g, '').replace(/ +/g, '-');
    const submissionId = document.location.href.split('/detail/').pop().split('/').shift(); // https://leetcode.com/submissions/detail/496294093/
    const lang = $('#result_language')[0].innerText.toLowerCase();
    const code = window.pageData.submissionCode;
    const result_progress = $('#result_progress_row').text(); // e.g., "83 / 83 test cases passed, but took too long."
    const result_status = $('#status').text(); // e.g., "Status: Time Limit Exceeded"
    const result_date = $('#result_date').text(); // e.g., "11 hours, 51 minutes ago"

    // extnames[lang] = source code extestion name
    const extnames = { [lang]: lang, 'c++': 'cpp', 'c#': 'cs', 'javascript': 'js', 'mysql': 'sql', 'python': 'py', 'python3': 'py', 'ruby': 'rb' };
    const commentPrefix = { [lang]: '//', 'bash': '#', 'mysql': '--', 'python': '#', 'python3': '#', 'ruby': '#' };

    const filename = prompt('Input desitination filename:', 'Solution_' + submissionId + '.' + extnames[lang]);
    if (!filename) {
        console.log('cancelled');
        return;
    }

    function queryQuestionFrontendID(titleSlug) {
        let postData = {
            "operationName": "questionData",
            "variables": {
                "titleSlug": titleSlug,
            },
            "query": "query questionData($titleSlug: String!) {\n  question(titleSlug: $titleSlug) {\n    questionId\n    questionFrontendId\n}\n}\n"
        };
        console.log(titleSlug);

        return fetch('https://leetcode.com/graphql', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
            },
            body: JSON.stringify(postData),
        }).then(r => {
            if (r.ok) {
                return r.json().then(j => j.data.question.questionFrontendId);
            } else {
                throw new Error('Failed to query question frontend ID. HTTP ' + r.status);
            }
        });
    }

    queryQuestionFrontendID(titleSlug).then(questionFrontendId => {
        const path = 'archives/' + titleSlug.replace(/-/g, '_') + '_' + questionFrontendId + '/' + filename;

        let fileComment = commentPrefix[lang] + '\n' +
            commentPrefix[lang] + ' ' + questionFrontendId + '. ' + title + '\n' +
            commentPrefix[lang] + ' https://leetcode.com/problems/' + titleSlug + '/\n' +
            commentPrefix[lang] + ' \n' +
            commentPrefix[lang] + ' ' + result_progress + '\t' + result_status + '\n' +
            commentPrefix[lang] + ` Runtime: ${window.pageData.runtime} ms\n` +
            commentPrefix[lang] + ` Memory Usage: ${Math.round(window.pageData.memory / 1e6 * 10) / 10} MB\n` +
            commentPrefix[lang] + ' \n' +
            commentPrefix[lang] + ' --\n' +
            commentPrefix[lang] + ' Created by ' + author + '\n' +
            commentPrefix[lang] + ' Git commit time:      ' + new Date().toLocaleString() + '\n' +
            commentPrefix[lang] + ' LeetCode submit time: ' + result_date + '\n' +
            commentPrefix[lang] + ' Submission detail page: ' + document.location.href + '/\n' +
            commentPrefix[lang] + ' Committed with a user script: https://gist.github.com/panzy/c126371311dc166a94e611de8f45e63c\n' +
            commentPrefix[lang] + '\n';
        console.log(fileComment);

        return fetch(`https://api.github.com/repos/${owner}/${repo}/contents/${path}`, {
            method: 'PUT',
            headers: {
                'Accept': 'application/vnd.github.v3+json',
                'Authorization': 'token ' + GITHUB_PERSONAL_ACCESS_TOKEN,
            },
            body: JSON.stringify({
                message: `Solved LeetCode problem ${questionFrontendId}. ${title}`,
                content: Base64.encode(fileComment + code),
            })
        }).then(r => {
            if (r.ok) {
                return r.json().then(j => {
                    console.log('Committed to: ' + j.content.html_url + '\n\n' + j.commit.sha);
                    alert('Committed. See Console log for detail');
                });
            } else if (r.status === 422) {
                return r.json().then(j => {
                    if (j.message === "Invalid request.\n\n\"sha\" wasn't supplied.") { // file exists
                        alert('This solution was already committed to GitHub before.');
                    } else {
                        throw new Error(j.message);
                    }
                });
            } else {
                alert('Failed to commit. HTTP ' + r.status);
            }
        });
    }).catch(err => {
        alert('Failed to commit. ' + err.message);
        console.error(err);
    });
})();