Block a user in Slack

block-slack-user.js

//
// This will hide all messages from a specific user in Slack. Enjoy the silence.
//

// get the owner id of a message
// -> loops back through list to find owner
function getOwnerId(i) {
  var current = i
  var sender = current.querySelector(".c-message__sender_link");
  var ownerId = sender ? sender.dataset.messageSender : null;
  while (!ownerId) {
    console.log("Owner not found for");
    console.log(current);
    current = current.previousSibling;
    if (!current){
      return null;
    }
    sender = current.querySelector(".c-message__sender_link");
    ownerId = sender ? sender.dataset.messageSender : null;
  }
  return ownerId;
}

// removes messages where the owner is some user id
function removeMessages() {
    // filter excludes thread inputs that are list items, too
    Array.from(document.body.querySelectorAll(".c-virtual_list__item")).filter(function (i) {return !i.id.endsWith("input")}).forEach(function (i) {
      var ownerId = getOwnerId(i);
      if (ownerId && ownerId == "USER ID HERE") {
        i.style.display = 'none';
      }
    })
}

// this is a hack, couldn't get a better solution to work
// better: https://stackoverflow.com/questions/3219758/detect-changes-in-the-dom
window.setInterval(removeMessages, 1000);