next_task.rb

#!/usr/bin/env ruby
require "open-uri"
require "rubygems"
require "json"

unless ENV["ASANA_API_KEY"]
  puts "please set ASANA_API_KEY in the env"
  exit 1
end

file = File.join(ENV["HOME"], ".asana_cache")
$cache = File.exists?(file) ? eval(File.read(file)) : {}

def get(path, cached = true) 
  $cache[path] ||= \
    JSON.parse(
      open("https://app.asana.com/api#{path}", 
           :http_basic_authentication=>[ENV["ASANA_API_KEY"],""]
          ).read
      )
end

me = get("/1.0/users/me")
me_id = me["data"]["id"]
wk_id = me["data"]["workspaces"].first["id"]
tasks = get("/1.0/tasks?workspace=#{wk_id}&assignee=#{me_id}", false)
tasks["data"].each do |task|
  path = "/1.0/tasks/#{task["id"]}"
  full_task = get(path)
  if(!full_task["data"]["completed"] && full_task["data"]["assignee_status"] == "today")
    $cache.delete path
    puts task["name"]
    break
  end
end

File.open(file, "w") {|h| h.puts($cache.inspect) }