Slack Emojis

emojis.rb

require 'net/http'
require 'json'

token = ENV['SLACK_API_TOKEN']
srcdir = ENV['SOURCE_DIR']

base = 'https://slack.com/api/emoji.list'
url = "#{base}?token=#{token}"

res = Net::HTTP.get(URI(url))
body = JSON.parse(res)

emoji = body['emoji']
emoji.each do |name, src|
  src.match(/(\.\w{3}\z)/)
  ext = $1
  if !ext.nil?
    filename = "#{name}#{ext}"
    filepath = "#{srcdir}/#{filename}"
    if !File.exists?(filepath)
      puts "Saving #{filename}"
      system("wget --quiet -O \"#{filepath}\" #{src} >/dev/null")
    else
      puts "Skipping #{filename}"
    end
  end
end