Script for unfollowing Twitter users who aren't following you, # or following users who are following you...or both

twitdiff.rb

#!/usr/bin/env ruby

# twitdiff.rb
# Quickie script for unfollowing users who aren't following you,
# or following users who are following you...or both

# Requires Grackle (http://github.com/hayesdavis/grackle/tree/master):
# sudo gem sources -a http://gems.github.com
# sudo gem install hayesdavis-grackle

require 'rubygems'
require 'grackle'
require 'net/https'
require 'optparse'

# defaults
options = {
  :username => "username",
  :password => "password",
  :quiet => false,
  :follow => false,
  :unfollow => false
}

OptionParser.new do |opts|
  opts.banner = "Usage: twitdiff.rb [options]"
  opts.on("-q", "--quiet", "Shhhh!") { |q| options[:quiet] = true }
  opts.on("--follow", "Follow anyone who is following you.") { |f| options[:follow] = true }
  opts.on("--unfollow", "Unfollow anyone who isn't following you.") { |f| options[:unfollow] = true }
  opts.on("--sync", "Same as --follow --unfollow") do |s| 
    options[:follow] = true
    options[:unfollow] = true
  end
  opts.on_tail("-h", "--help", "Show this message") do
    puts opts
    exit
  end
end.parse!

# Grackle supports OAuth, if someone wants to implement that option.
auth = {:type => :basic,
        :username => options[:username],
        :password => options[:password]}
client = Grackle::Client.new(:auth => auth)

followers = client.followers.ids?
friends = client.friends.ids?
friends_not_following = friends - followers
followers_not_friends = followers - friends

puts "You have #{followers.length} followers and #{friends.length} friends." unless options[:quiet]
puts "Friends who are not followers: #{friends_not_following.inspect}" unless options[:quiet]
puts "Followers who are not friends: #{followers_not_friends.inspect}" unless options[:quiet]

if options[:unfollow]
  friends_not_following.each do |id|
    begin
      response = client.friendships.destroy!(:id => id)
      puts "Unfollowed: #{response.screen_name} (#{response.id})" unless options[:quiet]
    rescue Grackle::TwitterError => e
      puts e
    end
  end
end

if options[:follow]
  followers_not_friends.each do |id|
    begin
      response = client.friendships.create!(:id => id)
      puts "Followed: #{response.screen_name} (#{response.id})" unless options[:quiet]
    rescue Grackle::TwitterError => e
      puts e
    end
  end
end