// ==UserScript==
// @name Twitter cleanup
// @version 1.9.3
// @grant Sly_North
// @description Remove user and topics to follow suggestions from Twitter
// @author Sly_North
// @match https://twitter.com/*
// @match https://mobile.twitter.com/*
// @namespace https://greasyfork.org/en/users/759669-sly-north
// @icon https://abs.twimg.com/responsive-web/client-web/icon-svg.168b89d8.svg
// @license MIT
// @grant none
// @downloadURL none
// ==/UserScript==

function RemoveFollowingThinElements(e, removeWithoutFollowButton) {
  console.log('- removing H=', e.getBoundingClientRect().height, ' ', e.innerText);
  let next = e.nextSibling;
  if (next) {
  let nextH = next.getBoundingClientRect().height;
    if (nextH < 200) {
      if (removeWithoutFollowButton || next.innerText.match(/Follow/))
        RemoveFollowingThinElements(next, removeWithoutFollowButton);
      else {
        // console.log('- TWcleanup stops at H=', nextH, ' "' + next.innerText + '"');
        if (next.innerText === 'Show more') {
          next.innerHTML = "";
        }
      }
    }
  }
  e.innerHTML = "";
}

// Tool to remove the "X follows Y" tweets and "See more" suggested topics.
function RemoveSuggestedTweets(name, regex) {
  let elts = Array.from(document.getElementsByTagName('article')).filter(e => e.innerText.match(regex));
  if (elts.length > 0) {
    console.log('- Found ', name, ' count=', elts.length);
    for (let e of elts) {
      console.log('  - ', e.innerText.substring(0, 40));
      e.innerHTML = "";
    }
  }
}

function RemoveSuggestions() {
  // Remove suggested people to follow
  let elts = Array.from(document.getElementsByTagName('H2')).filter(
	  // Needs to be in screen for nextSibling to be defined.
    e => e.getBoundingClientRect().top < window.innerHeight &&
           e.innerText === 'Who to follow');
  if (elts.length > 0) {
    console.log('Found "Who to follow"');
    for (let e of elts) {
      e = e.parentElement.parentElement.parentElement.parentElement;
      RemoveFollowingThinElements(e, false);
    }
  }

  // Remove suggested topics
  elts = Array.from(document.getElementsByTagName('SPAN')).filter(
    e => // e.getBoundingClientRect().top < window.innerHeight &&
      (e.innerText === 'Topics to follow' || e.innerText === 'Expand your timeline with Topics'));
  if (elts.length > 0) {
    console.log('Found "', elts[0].innerText, '"');
    for (let e of elts) {
      e = e.parentElement.parentElement.parentElement.parentElement.parentElement.parentElement;
      // Remove topics and offset bar
      RemoveFollowingThinElements(e.nextSibling, true);
      // Remove title
      e.innerHTML = "";
    }
    console.log('Removed "', title, '"');
  }

  // Remove tweets of people followed by one we follow
  RemoveSuggestedTweets('X follows Y', / follows*\n/);
  // Remove "See more" suggestions
  RemoveSuggestedTweets('See more', /\nSee more\n/);

  // Unfreeze scrolling (ie: in incognito after scrolling a bit)
  if (document.documentElement.style.overflow) document.documentElement.style.overflow = "scroll";

  let eltCred = document.getElementById('credential_picker_container');
  if (eltCred && eltCred.getBoundingClientRect().width < 400) eltCred.style.display = "none";

  // If the window is very small (like when watching a video in a small secondary window),
  // remove the Twitter left column and top banner.
  {
    let elts = document.getElementsByTagName('header');
    if (elts.length > 0) {
      const widthLimit = document.location.href === 'https://twitter.com/home' ? 1000 : 800;
      const smallWindow = window.innerWidth < widthLimit;
      elts[0].style.display = smallWindow ? "none" : "";
      const primaryCol = document.querySelector('[data-testid="primaryColumn"]');
      primaryCol.style.maxWidth = smallWindow ? null : '600px';
      primaryCol.style.minWidth = smallWindow ? '100vw' : null;
    }
    var elt = document.querySelector('[aria-label="Home timeline"]');
    if (elt) elt.firstChild.style.display = (window.innerHeight < 700) ? "none" : "";
  }

  setTimeout(RemoveSuggestions, 1000);
}

// Remove credential banner (in incognito windows)
let bottomBanners = Array.from(document.getElementsByTagName('div'))
    .filter(e => e.dataset.testid === 'BottomBar' );
if (bottomBanners.length > 0) bottomBanners[0].innerHTML = '';
let elt = document.getElementById('credential_picker_container');
if (elt) elt.innerHTML = "";

setTimeout(RemoveSuggestions, 1000);

/*
// Switch to the Following tab
if (document.location.href === 'https://twitter.com/home') {
  setTimeout(() => {
  for (let e of document.getElementsByTagName('span')) {
      if (e.innerText === 'Following') { e.click(); break;}
    }
  }, 500);
}
*/