OpenSourceMalaria - add OSM badge to Twitter profile image

osm_badger.rb

#! /udr/bin/env ruby

require 'twitter'
require 'rmagick'
require 'open-uri'

# set up the twitter client
client = Twitter::REST::Client.new do |config|
  config.consumer_key        = # redacted
  config.consumer_secret     = # redacted
  config.access_token        = # redacted
  config.access_token_secret = # redacted
end

# grab the badge
badge_url = 'http://malaria.ourexperiment.org/data/files/10898/OSM_Malaria_Logo_Final.png'
open('badge.png', 'wb') do |file|
	file << open(badge_url).read
end

# grab the user's profile image
profile_url = client.user.profile_image_uri(size = :original)
open('profile.png', 'wb') do |file|
  file << open(profile_url).read
end

# create the composite image - put the badge in the bottom right
profile = Magick::Image.read('profile.png').first
profile_width = profile.columns
badge_width = profile_width / 2
badge = Magick::Image.read('badge.png').first
badge.resize_to_fit!(badge_width, badge_width)
profile.composite!(badge, Magick::SouthEastGravity, Magick::OverCompositeOp)
profile.write('composite.png')

# update the profile image
base64_image = [open('composite.png').read].pack('m') # read image to base64
client.update_profile_image base64_image