Simple Ruby script to sync Basecamp and Things to-dos.

.sync_things.yaml

---
url: yoursubdomain.basecamphq.com
username: your_api_token
password: X
current_user: your_current_user_id (pull it out of your edit URL)
basecamp_project: your_project_id (in URL)

sync_things.rb

#!/usr/bin/env ruby
#
# Biggest problem with this is that it checks everything.  Needs
# to be adjusted to only check N days and/or N tasks on Basecamp.
#
# Also has a problem in that Completed always wins.  If you have a
# task marked at completed, then mark it as open again on just one
# side, it'll mark the other as completed if you run the sync again.
#
# All that said, it provides a basic, very rudimentary sync.
#
# TODO:
#  - Check Logbook for items if they don't exist in their current
#    current location in Things.
#  - Control how many items to actually check for syncing purposes
#  - Use local cache to determine what syncing has happened in the
#    past and try to be smart about future syncs.

require 'basecamp' # you need to d/l the basecamp.rb file from Basecamp
require 'appscript' # gem install rb-appscript
require 'yaml'

conf = YAML.load(File.open(ENV['HOME'] + "/.sync_things.yaml"))
Basecamp.establish_connection!(conf['url'], conf['username'], conf['password'], true)

bucket_names = {
    :inbox => 1,
    :today => 2,
    :next => 3,
    :someday => 5,
}

basecamp_bucket = {}
on_basecamp = {}


lists = Basecamp::TodoList.all(conf['basecamp_project'])
lists.each do |list|
  name = list.name.downcase.to_sym
  basecamp_bucket[name] = {} if basecamp_bucket[name].nil?
  on_basecamp[name] = [] if on_basecamp[name].nil?
  list.todo_items.each do |item|
    begin
      if item.responsible_party_id == conf['current_user']
        on_basecamp[name] << item.content
        basecamp_bucket[name][item.content] = item
      end
    rescue
      # I know, I know...
    end
  end
end

things = Appscript.app('Things')
bucket_names.each do |name,key|
  things.lists[key].to_dos.get.each do |to_do|
    idx = on_basecamp[name].index(to_do.name.get) unless on_basecamp[name].nil? # not sure why, but this is sometimes nil
    if !idx.nil?
      puts "attempting to sync [#{to_do.name.get}]"

      # check to see if its been completed on Basecamp
      if basecamp_bucket[name][to_do.name.get].completed
        puts " - marking local as completed"
        to_do.status.set(:completed)
      else if to_do.status.get == :completed
        puts " - marking remote as completed"
        basecamp_bucket[name][to_do.name.get].complete!
      end end

      on_basecamp[name].delete(to_do.name.get)
    end
  end
end

# now start adding from basecamp to things
on_basecamp.each do |bucket_name, entries|
  entries.each do |entry|
    puts "adding new entry [#{entry}]"
    things.lists[bucket_names[bucket_name]].make(
      :new => :to_do,
      :with_properties => {
        :name => entry
      }
    )
  end
end