Copy Github PR

Adds a "Copy PR" button to copy the title and link as a rich text
As of 2023-11-30. See the latest version.
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// ==UserScript==
// @name         Copy Github PR
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Adds a "Copy PR" button to copy the title and link as a rich text
// @author       Othman Shareef (othmanosx@gmail.com)
// @match        https://github.com/*
// @icon         https://github.githubassets.com/favicons/favicon.svg
// @grant        none
// @license MIT
// ==/UserScript==
(function() {
    'use strict';
    const elementQuery = 'h1 .markdown-title'
    let button
    let debounceTimer;
 
    // Wait for the Jira ticket title element to be available
    const waitForElement = (selector, callback) => {
        const element = document.querySelector(selector);
        if (element) {
            callback();
        } else {
            setTimeout(() => {
                waitForElement(selector, callback);
            }, 200);
        }
    };
 
    // copy ticket title to clipboard
    const copyPR = () => {
        button.innerText = 'Loading...';
        const ticketTitleElement = document.querySelector(elementQuery);
        if (ticketTitleElement) {
            const PRTitle = ticketTitleElement.innerText;
            const PRLink = window.location.href
            const html = `<a href="${PRLink}">${PRTitle}</a>`
            const clipboardItem = new ClipboardItem({
                'text/html': new Blob([html], {
                    type: 'text/html'
                }),
                'text/plain': new Blob([html], {
                    type: 'text/plain'
                })
            });
            navigator.clipboard.write([clipboardItem]).then(_ => {
                // Change button text to "Copied!" for a moment
                button.innerText = 'Copied!';
                setTimeout(() => {
                    // Change button text back to the original text after a delay
                    button.innerText = 'Copy PR';
                }, 1000); // You can adjust the delay (in milliseconds) as needed
            }, error => alert(error));
             } else {
            alert('PR title element not found!');
        }
    };
 
    // Add button next to the ticket title
    const addButton = () => {
        const existingCopyBtn = document.getElementById("copy-button")
        if(existingCopyBtn) return
        const copyButton = document.createElement('button');
        copyButton.innerText = 'Copy PR';
        copyButton.className = 'Button--secondary Button--big Button';
        copyButton.id = "copy-button"
        copyButton.style.marginLeft = '10px';
        copyButton.style.marginTop = '5px';
        copyButton.style.verticalAlign = 'text-top';
 
        copyButton.addEventListener('click', copyPR);
 
        button = copyButton
        const element = document.querySelector(elementQuery);
        element.parentElement.appendChild(copyButton);
    };
 
    waitForElement(elementQuery, addButton);
 
    const debounce = (func, delay) => {
        clearTimeout(debounceTimer);
        debounceTimer = setTimeout(func, delay);
    };
 
        // Use MutationObserver to detect changes in the DOM
    const observer = new MutationObserver(() => {
        debounce(() => {
            waitForElement(elementQuery, addButton);
        }, 100);
    });
 
    // Observe changes in the body and its descendants
    observer.observe(document.body, {
        childList: true,
        subtree: true,
    });
 
})();