Bulk unfollow inactive users

Gemfile

source 'https://rubygems.org'

gem 'twitter'

twitter-purge.rb

require 'twitter' # v6.2.0

# Setup the twitter api
#
THRESHOLD = (Date.today - 90).to_time
CLIENT = Twitter::REST::Client.new do |config|
  config.consumer_key = ""         # TODO
  config.consumer_secret = ""      # TODO
  config.access_token = ""         # TODO
  config.access_token_secret = ""  # TODO
end

# Guard against rate limiting
#
def api(&block)
  CLIENT.instance_eval &block
rescue Twitter::Error::TooManyRequests => error
  reset = error.rate_limit.reset_in
  puts "TOO MANY REQUESTS ... retrying in #{reset} seconds"
  sleep reset
  retry
end


# Cache stuff for subsequent runs
#
CACHE = File.readlines(".cache").map(&:strip)
def append_line(file_name, line)
  File.open(file_name, "a") { |file| file.write "#{line}\n" }
end



### MAIN


api { friend_ids.to_a }.each do |user_id|
  next if CACHE.include? user_id.to_s

  timeline = api { user_timeline(user_id, include_rts: false, count: 1, trim_user: true) }
  unless timeline.first && timeline.first.created_at > THRESHOLD
    handle = api { user(user_id).screen_name }
    api { unfollow(user_id) }
    append_line "unfollowed", "https://twitter.com/#{handle}"
  end

  append_line ".cache", user_id
end