Bulk export custom emoji from Slack

README_slack_emoji_exporter.md

This builds off the excellent work of @lmarkus, @dogeared, @itsrachelle, and @JPablomr.

The scripts below can be used in conjunction with the Neutral Face Emoji Tools Google Chrome extension to (bulk!) export emojis from one Slack team and import into another team: https://chrome.google.com/webstore/detail/neutral-face-emoji-tools/anchoacphlfbdomdlomnbbfhcmcdmjej

Original work here: https://gist.github.com/lmarkus/8722f56baf8c47045621, https://gist.github.com/itsrachelle/0a139a3f53d36b5b24359bcc99b39b3a.

Steps:

1. Run js in dev tools
2. Save json object in a .txt file
3. Run bash script
4. Drag and drop all of the downloaded emojis in the bulk uploader enabled through the chrome extension

downloadSlackEmojis.sh

#!/usr/bin/env bash
# Use:
# Make this file executable, and feed it the results from the Slack emoji URL dump. Files will be downloaded to `output`
#   chmod +x downloadSlackEmojis.sh
#   ./downloadSlackEmojis.sh emojiUrls.txt
#
# Note: This depends on the jq utility for parsing json from the command line - https://stedolan.github.io/jq/

mkdir -p output;

jq -r '.[] | "curl -s -o \"output/\(.name)\(.extension)\" \"\(.url)\""' $1 | \
while read -r line; do eval "$line"; done

# You can now drag and drop all the emoji files in the output folder to the Bulk 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/neutral-face-emoji-tools/anchoacphlfbdomdlomnbbfhcmcdmjej

extractEmojis.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
 */

/*
 * This code scrolls to bottom of page to load all emojis.
 */

// Track the inside container's position
var scrollPosition = $('.c-scrollbar__hider')[0].scrollTop;
// Bump this higher if it's stopping mid-list.
var SLEEP_TIME = 750;

while(true) {
    // We're not sure how big the container is as it's loaded dynamically
    // So we scroll in increments of 1000
    var newScrollPosition = $('.c-scrollbar__hider')[0].scrollTop += 1000;

    // We know we've hit the bottom when the position stops changing
    if (newScrollPosition == scrollPosition) {
    break;
    }

    // Otherwise let's track the current position and keep going
    scrollPosition = newScrollPosition;

    // Sleep so the page can load the new emojis
    await sleep(SLEEP_TIME);
}

/* This code extracts all the emoji data into the following format:
    [
        {
            name,
            url,
            extension,
        },
    ]
 * This emoji data is then automatically copied onto your clipboard.
 */

// Set the row container to a ridiculously large height, so that all the emojis
// are visible in the document.
document.getElementsByClassName('c-table_view_all_rows_container')[0].style.height = '100000px'
var emojis = document.getElementsByClassName('p-customize_emoji_list__image')
var extract = []

for (var i = 0; i < emojis.length; i++) {
    var image = emojis[i]
    extract.push({
        name: image.alt,
        extension: `.${image.src.split('.').pop()}`,
        url: image.src,
    })
}

console.log(extract)
copy(extract)

// Now, paste the contents of your clipboard into a file (named "emojiUrls.txt")
// Use with downloadSlackEmojis.sh