fetch pivotal tracker story name from id

tracker_story_name.rb

#!/usr/bin/env ruby

=begin
Author: Sandro Turriate
Permalink: http://gist.github.com/272583

DESCRIPTION
-----------
Turn a Pivotal Tracker story id into the name of that story.

SETUP
-----
$ gem install httparty
$ cat ~/.tracker_project
54321
$ cat ~/.tracker.yml
api_token: 4798frafa4593fja32b32bwerbasflj1

The ~/.tracker_project file contains the current Pivotal Tracker project id
that you're working on.
The ~/.tracker.yml file contains your Pivotal Tracker api key.


USAGE
-----
$ ./tracker_story_name.rb 12345
Sign Out redirects to the home page
=end

begin; require 'rubygems'; rescue LoadError; end
require 'httparty'

class TrackerStory
  include HTTParty

  base_uri "https://www.pivotaltracker.com/services/v2"

  attr_reader :name, :id

  def initialize(id)
    @id = id
    self.class.headers 'X-TrackerToken' => api_token
  end

  def name
    @name ||= result['name']
  end

  def result
    @result ||= fetch
  end

  protected

  def fetch
    response = self.class.get("/projects/#{project_id}/stories/#{id}")
    if response['story']
      response['story']
    elsif error_message = response['message']
      abort error_message
    else
      abort "Could not interpret the response: #{response.inspect}"
    end
  end

  def project_id
    @project_id ||= File.read("#{ENV['HOME']}/.tracker_project").strip
  end

  def api_token
    @api_token ||= YAML.load_file("#{ENV['HOME']}/.tracker.yml")['api_token']
  end
end


if __FILE__ == $0
  args = $stdin.tty? ? ARGV : $stdin.readlines

  if args.empty?
    abort "Please provide a story number."
  else
    puts TrackerStory.new(args.first.to_i).name
  end
end