Slack Emoji Liberator

slack_emoji_liberator.js

// Download all the custom emoji your slack team have created!

// Start by going to the "Customize Emoji" screen for your Slack team.
// Open up a browser console and run the following JS

var pattern = new RegExp("https://emoji.slack-edge.com/.*?/([^/]+?)/[^/]+(\.png|jpg|gif)");

function link_text (url) {
  var match = pattern.exec(url);
  if (match) {
    var name = match[1];
    var extension = match[2];
    return "<a class='radz-download-link' download='"+ name + extension + "' href='"+url+"'>"+name+"</a>\n";
  } else {
    return "";
  }
}

var urls = $.map($('td span[data-original]'), function (el) { return $(el).data('original'); });
var total_html = urls.reduce(function (html_str, url) { html_str += link_text(url); }, "");

// Copy the total_html string

// Open a url for one of the images so you have a web page on the same
// domain as where slack is serving the images from

open(urls[0]); // Or even better, inject an iframe with the
// appropriate url, and javascript and such...

// Edit the contents of total_html into this new page

// Now, in this window, run the following javascript

var links = Array.from(document.getElementsByClassName("radz-download-link"));

function downloadAndRemoveLink(link) {
  console.log(link);
  link.click();
  link.remove();
}

function setupNextCall() {
  setTimeout(function() {
    if (links.length > 0) {
      downloadAndRemoveLink(links.pop());
      setupNextCall();
    }
  }, 200);
}