Small script to retrieve a twitter account's followers and report on new followers and 'unfollows'

twitter-followers.rb

#!/usr/bin/ruby
# Small script to retrieve a twitter account's followers 
# and report on new followers and 'unfollows'

require 'twitter'
require_relative '../lib/wipple/config'

ACCOUNT = 'change_me'

AUTH = {
  :consumer_key        => 'change me',
  :consumer_secret     => 'change me',
  :access_token        => 'change me',
  :access_token_secret => 'change me'
}

twitter ||= Twitter::REST::Client.new do |tconfig|
  tconfig.consumer_key        = AUTH[:consumer_key]
  tconfig.consumer_secret     = AUTH[:consumer_secret]
  tconfig.access_token        = AUTH[:access_token]
  tconfig.access_token_secret = AUTH[:access_token_secret]
end

MAX_ATTEMPTS = 3

def try
  num_attempts = 0

  begin
    yield

  rescue Twitter::Error::TooManyRequests => error
    if num_attempts < MAX_ATTEMPTS
      time = error.rate_limit.reset_in
      puts "Rate Limit Exceeded, Sleeping for #{time} seconds"
      sleep time
      retry
    end
  end
end

followers = nil

try do
  followers = twitter.followers(ACCOUNT)
end

path     = File.expand_path("~/.twitter.followers")
existing = File.read(path).split("\n")
updated  = []

try do
  followers.each { |follower|
    updated << follower.screen_name
  }
end

File.write(path, updated.join("\n"))

(existing - updated).each { |name|
  puts "Missing: #{name}"
}

(updated - existing).each { |name|
  puts "New: #{name}"
}