Scrape facebook event

This code automates the scraping of Facebook event details, including its description and discussions, using Puppeteer.
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What the code could have been:

const { Client } = require('../Core');

/**
 * Scrape a Facebook event.
 * 
 * This function uses a Puppeteer client to navigate to the event page, extract information, 
 * and return the results in a structured format.
 * 
 * @param {string} event - The URL of the Facebook event to scrape.
 * @returns {Promise<Object>} A promise that resolves to an object containing the scraped data.
 */
async function scrapeFacebookEvent(event) {
    try {
        // Create a new Puppeteer client instance
        const client = new Client();

        // Navigate to the event page
        const url = await client.getUrl();
        if (!url.includes(event)) {
            // If the current URL doesn't match the event URL, navigate to the event page
            await client.url(event);
        }

        // Wait for the page to load
        await client.pause(3000);

        // Check if the About button exists and click it if it does
        if (await client.isExisting('//a[contains(., "About")]')) {
            await client.click('//a[contains(., "About")]');
        }

        // Wait for the next page to load
        await client.pause(1000);

        // Extract event description
        const description = await extractDescription(client);

        // Check if the Discussion button exists and click it if it does
        if (await client.isExisting('//a[contains(., "Discussion")]')) {
            await client.click('//a[contains(., "Discussion")]');
        }

        // Wait for the next page to load
        await client.pause(1000);

        // Extract discussion data
        const discussionData = await extractDiscussionData(client, description);

        // Process the discussion data
        const processedData = discussionData.map((data, index) => ({
           ...data,
            description: description[index].description.map((desc) => desc.value.join(' ')),
            posts: data.posts.map((post) => ({
               ...post,
                event,
                description: post.description.join(' '),
                participants: post.participants.filter((participant) => participant!== '#' && participant.indexOf('photo') === -1),
                photos: post.participants.filter((participant) => participant!== '#' && participant.indexOf('photo')!== -1),
                comments: post.comments.map((comment) => ({
                   ...comment,
                    time: comment.time.join(' '),
                    content: comment.content.join(' '),
                    from: comment.from.join(' ')
                }))
            }))
        }));

        // Return the processed data
        return processedData;
    } catch (error) {
        console.log(error);
        throw error;
    }
}

/**
 * Extract event description.
 * 
 * This function uses Puppeteer to extract the event description from the event page.
 * 
 * @param {Client} client - The Puppeteer client instance.
 * @returns {Promise<Array<Object>>} A promise that resolves to an array of objects containing the event description.
 */
async function extractDescription(client) {
    const xPath = '//body[not(.//*[contains(@class, "fbPhotoSnowliftPopup")])]|//body[.//*[contains(@class, "fbPhotoSnowliftPopup")]]//*[contains(@class, "fbPhotoSnowliftPopup")]';
    const description = await getAllXPath([xPath, {
        description: [
            './/*[contains(@id, "reaction_units")]/div/div|.//*[contains(@id, "event_summary")]//li',
            {
                value: ['.//span//text()']
            }
        ]
    }]);
    return description;
}

/**
 * Extract discussion data.
 * 
 * This function uses Puppeteer to extract the discussion data from the discussion page.
 * 
 * @param {Client} client - The Puppeteer client instance.
 * @param {Array<Object>} description - The event description.
 * @returns {Promise<Array<Object>>} A promise that resolves to an array of objects containing the discussion data.
 */
async function extractDiscussionData(client, description) {
    const xPath = '//body[not(.//*[contains(@class, "fbPhotoSnowliftPopup")])]|//body[.//*[contains(@class, "fbPhotoSnowliftPopup")]]//*[contains(@class, "fbPhotoSnowliftPopup")]';
    const discussionData = await getAllXPath([xPath, {
        posts: [
            './/*[contains(@class, "fbPhotoSnowliftAuthorInfo")]|.//*[contains(@class, "fbUserPost")]',
            {
                description:
                    './/following-sibling::div//*[contains(@class, "fbPhotosPhotoCaption")]//text()|.//*[contains(@class, "userContent")]//text()|.//h5//text()|.//a[contains(@class, "profileLink")]//text()',
                participants: [
                    './/a[contains(@class, "profileLink")]/@href|.//a[contains(@href, "facebook") and.//img]/@href',
                    './following-sibling::div//a/@href',
                    './/*[contains(@class, "commentable_item")]//a[contains(@class, "UFICommentActorName")]/@href'
                ],
                comments: [
                    './/h6[contains(., "Comments")]//following-sibling::div/div/div[contains(@class, "UFIComment")]',
                    {
                        time:
                            './/*[contains(@class, "uiLinkSubtle")]//text()',
                        content:
                            './/*[contains(@class, "UFICommentBody")]//text()',
                        from:
                            './/a[contains(@class, "UFICommentActorName")]/text()|.//a[contains(@class, "UFICommentActorName")]/@href'
                    }
                ]
            }
        ]
    }]);
    return discussionData;
}

/**
 * Get all XPath elements.
 * 
 * This function uses Puppeteer to get all elements matching the specified XPath.
 * 
 * @param {Array<string|Object>} xPath - The XPath to match.
 * @returns {Promise<Array<Object>>} A promise that resolves to an array of objects containing the matched elements.
 */
async function getAllXPath(xPath) {
    // TO DO: implement get all XPath function
    throw new Error('Not implemented');
}

module.exports = scrapeFacebookEvent;
This code snippet is designed to scrape information about a Facebook event. Here's a breakdown:
This code snippet is part of a larger system for scraping Facebook event data. It automates the process of fetching an event page, extracting its description, and gathering information about discussions happening within the event.