groupme fetch image urls

groupme.rb

require 'httparty'
require 'ap'

$url = ARGV.shift
$cookie = ARGV.shift

raise unless $url && $cookie

class Client
  include HTTParty
  
  def self.messages(before_id)
    get("#{$url}&before_id=#{before_id}", headers: {"Cookie" => $cookie})
  end
end

before_id = nil

begin
  json = Client.messages(before_id)
  before_id = json['response']['messages'].last['id']
  puts json['response']['messages'].map { |row| row['picture_url'] }.compact
end while before_id