Scrape facebook friends

This code provides a function scrapeFacebookFriends that automates the process of logging into Facebook, extracting unique friend URLs from the user's friends page, and storing them in an array. It utilizes Selenium for browser automation and XPath for element selection.

Run example

What the code could have been:

// Import the core module
const core = require('../Core');

/**
 * Scrape Facebook friends
 * @return {Promise} Friends list
 */
function scrapeFacebookFriends() {
    // Initialize friends list
    const friends = [];

    // Login to Facebook
    return core.loginFacebook()
       .then((result) => {
            // Navigate to friends page
            return result.url('https://www.facebook.com/me/friends');
        })
       .then(() => {
            // Wait for 4 seconds
            return result.pause(4000);
        })
       .then(() => {
            // Scrape friends list
            return scrapeFriendsList(false, '//a[contains(@href, "friends_tab")]/@href', friends, (a, b) => a === b, (i) => i < 30);
        })
       .then((html) => {
            // Extract HTML content
            return result.getHTML('body');
        })
       .catch((error) => {
            // Log any errors
            console.error(error);
        });
}

/**
 * Scrape Facebook friends list
 * @param {boolean} useCache Use cache
 * @param {string} selector Selector
 * @param {array} list Friends list
 * @param {function} equalityComparer Equality comparer
 * @param {function} limitCondition Limit condition
 * @return {Promise} Friends list
 */
function scrapeFriendsList(useCache, selector, list, equalityComparer, limitCondition) {
    // Scrape friends list until condition is met
    return getAllUntil(
        useCache,
        selector,
        list,
        equalityComparer,
        limitCondition
    );
}

// Scrape friends list until condition is met
function getAllUntil(useCache, selector, list, equalityComparer, limitCondition) {
    // TODO: Implement useCache functionality
    return core.getHTML(selector, {})
       .then((data) => {
            // Parse data
            const parsedData = parseData(data);
            
            // Add parsed data to list
            list.push(...parsedData);
            
            // Check limit condition
            if (limitCondition(list.length)) {
                // Return list
                return list;
            } else {
                // Recursively scrape until condition is met
                return getAllUntil(useCache, selector, list, equalityComparer, limitCondition);
            }
        })
       .catch((error) => {
            // Log any errors
            console.error(error);
        });
}

// Parse data
function parseData(data) {
    // TODO: Implement data parsing logic
    // For now, assume data is an array of friend names
    return data;
}

module.exports = scrapeFacebookFriends;

This code defines a function scrapeFacebookFriends that automates the process of scraping Facebook friend URLs.