VK get posts in feed

script.js

// This is a script to get posts from feed, mark them with emoji (similar to reaction you set on post)
// In the end, it returns a text you can copy and post directly to VK.
// The text will reference all the posts you've reacted to.

const config = {
  timeToLoad: 1000,
  timeToUnload: 350,
  zeroResultLimit: 10
};

// set ids of people, public pages or groups here. You can add as many as you want
// vk.com/[id_of_page], like vk.com/internetpasta 
const sources = [ "internetpasta", "internet_2_0", "pastachn", "pastch", "lurkopub", "aveshit", "lurking", "bugurt_thread", "copyipasta", "imbetarded" ];

let postList = new Set();
let zeroResultCounter = 0;

// HERE WE GO

const timer = setInterval( async ()=> {
  await work();
  if (zeroResultCounter >= config.zeroResultLimit) {
    clearInterval(timer)
    console.dir(Array.from(postList));
  };
}, config.timeToLoad + (zeroResultCounter * (config.timeToUnload)));

// THESE ARE THE FUNCTIONS

async function work() {
    let delta = postList.size;
    const posts = await getPosts();
    extractDataFromPosts(posts).forEach((post) => postList.add(post));
    delta = postList.size - delta;
    if (delta === 0) { zeroResultCounter++ } else { zeroResultCounter = 0 };

    window.scrollTo(0, document.body.scrollHeight);
    sleep(config.timeToLoad);
}

async function getPosts() {
  const posts = document.querySelectorAll(
    `#feed_rows .post:has(.PostHeader__avatar:is(${sources.map((id) => `[href="/${id}"]`).join(",")}}))`
  );
  const postsArr = Array.from(posts);
  console.log(`Found ${postsArr.length} posts, proceed to process...`);
  return postsArr;
}


/**
 * 
 * @param {HTMLElement[]} posts 
 * @returns {string[]}
 */
function extractDataFromPosts(posts) {
  return posts.map((post) => {
    const data = {
      text: getPostText(post),
      reaction: getReaction(post),
      link: getLinkToPost(post),
      shortText: getShortString(getPostText(post)).replace(/^[ ]+/g, ``).replace(/\n/g, ` `).replace(/\s+/g, ` `).replace(/^\#[A-Za-zА-Яа-я_]/g, ``)
    }

    // unLikePost(posts); // enabling this line causes VK's CAPTCHA to appear

    return `@${data.link} (${data.reaction + ` ` ?? ``}"${data.shortText}")`;
  });
}

/**
 * 
 * @param {HTMLElement} post 
 * @returns {void}
 */
function unLikePost(post) {
  post.querySelector(".post_content .like_wrap .PostButtonReactions[data-reaction-user-reaction-id]").click();
}

/**
 * 
 * @param {HTMLElement} post 
 * @returns {string}
 */
function getPostText(post) {
  return post.querySelector(`.post_content .wall_text .wall_post_text`)?.innerText ?? 'Картинка';
}

/**
 * 
 * @param {HTMLElement} post 
 * @returns {string}
*/
function getReaction(post) {
  const reactionIdMap = {
    0: "💩",
    1: "😂",
    2: "🤔",
    3: "😂",
    4: "😱",
    5: "😢"
  }
  // map this reactionIdMap with given string
  return reactionIdMap[post.querySelector(`.post_content .like_wrap .PostButtonReactions[data-reaction-user-reaction-id]`).getAttribute(`data-reaction-user-reaction-id`)] ?? "";
}

/**
 * 
 * @param {HTMLElement} post 
 * @returns {string}
*/
function getLinkToPost(post) {
  return `https://vk.com${post.querySelector(`.post_link[href]`).getAttribute(`href`)}`;
}

/**
 * 
 * @param {string} text 
 * @param {string} delimiter 
 * @param {number} length 
 * @returns 
 */
function getShortString(text, delimiter = ".", length = 100) {
  if (text.length <= length) {
    return text;
  } else {
    let shortText = text.substring(0, 100);
    let indexOfDot = shortText.lastIndexOf(delimiter);
    if (indexOfDot === -1) {
      return shortText + "...";
    } else {
      return shortText.substring(0, indexOfDot);
    }
  }
}

/**
 * 
 * @param {number} ms 
 * @returns Promise
 */
function sleep(ms) {
  return new Promise((r) => setTimeout(r, ms));
}