Extracting / Exporting custom emoji from Slack

00_README

This builds off the excellent work of @lmarkus & @dogeared.

The scripts below can be used in conjunction with the Slack Emoji Tools Google Chrome extension to export emojis from
one Slack team and import into another team. 

Original work here: 
* https://gist.github.com/lmarkus/8722f56baf8c47045621
* https://gist.github.com/dogeared/f8af0c03d96f75c8215731a29faf172c

01_extract.js

// Login to your team through the browser. 
// Go to: https://<team name>.slack.com/customize/emoji
// Run this on the browser's dev tools javascript console

var emojis = $('.emoji_row');

var emojiList = emojis.map(function () {
  var url = $(this).find('td:nth-child(1) span').attr('data-original');
  if (url.length > 512) {  // bonkers data-urls
      return null
  }
  var extension = url.substring(url.lastIndexOf('.'));
  var name = $(this).find('td:nth-child(2)').html().replace(/:|\s/g, '');
  return {name, extension, url}
}).get();


function curlEmoji({name, extension, url}) {
    return `url "${url}"
output "${name}${extension}"
`
}

function curlConfigFilename() {
    var slackHost = new URL(boot_data.team_url).hostname.split('.', 1)[0]
    return `${slackHost}-emoji.curl.cfg`
}

var curlOptions = emojiList.map(curlEmoji)

var output = new Blob(curlOptions, {type: "text/plain"})
var downloadLink = document.createElement("a")
downloadLink.href = URL.createObjectURL(output)
downloadLink.download = curlConfigFilename()
downloadLink.append(`⬇️ Download: ${curlConfigFilename()}`)

$('#custom_emoji').before(downloadLink)
downloadLink.click()

/**
 * this will download a curl.cfg file
 * use it with curl as
 * 
 *   curl --config ourteam-emoji.curl.cfg
 *
 * and files will be downloaded to the current directory.
 *
 * You can now drag and drop all the emoji files in the output folder to the Buld Emoji Uploader space that you'll see on
 * the https://<team>.slack.com/customize/emoji page if you've installed the chrome extension
 * https://chrome.google.com/webstore/detail/slack-emoji-tools/anchoacphlfbdomdlomnbbfhcmcdmjej
 */