GitHub Gist.dropzone

#!/usr/bin/env ruby
 
# Dropzone Destination Info
# Name: GitHub Gist
# Description: Drag text or files to share them instantly via GitHub Gist. Hold down option to make a public Gist. Click to copy and goto the last URL.
# Handles: NSStringPboardType, NSFilenamesPboardType
# Events: Clicked, Dragged
# KeyModifiers: Option
# Creator: Justin Hileman
# URL: http://justinhileman.com
# IconURL: http://aptonic.com/destinations/icons/gist.png
# OptionsNIB: Login
# LoginTitle: Your GitHub username and API token

require 'open-uri'
require 'net/http'
require 'yaml'
 
class Gist
  @@gist_url = 'http://gist.github.com/%s'
  @@last_url_filename = File.expand_path("~/.dz_last_gist_files")
  
  class << self
    
    def post_text(content, private_gist)
      url = URI.parse('http://gist.github.com/api/v1/yaml/new')
      request = Net::HTTP.post_form(url, build_params(fake_file(prompt_filename, content), private_gist))
      if request.code.to_i == 200
        response = YAML.load(request.body)
        persist(@@gist_url % response['gists'][0][:repo])
      else
        raise "Error: #{request.code}"
      end
    end
    
    def post_files(filenames, private_gist)
      url = URI.parse('http://gist.github.com/api/v1/yaml/new')
      request = Net::HTTP.post_form(url, build_params(read_files(filenames), private_gist))
      if request.code.to_i == 200
        response = YAML.load(request.body)
        persist(@@gist_url % response['gists'][0][:repo])
      else
        raise "Error: #{request.code}"
      end
    end
    
    def get_last_url
      if File.readable?(@@last_url_filename)
        File.open(@@last_url_filename).read.chomp
      else
        $dz.finish("No Gists yet")
        $dz.url(false)
        Process.exit!
      end
    end
  
    private
    
    def prompt_filename
      output = `./CocoaDialog standard-inputbox --title "Gist name" --e --informative-text "Enter Gist name:"`
      button, filename = output.split("\n")

      if button == "2"
        $dz.finish("Cancelled")
        $dz.url(false)
        Process.exit!
      end
      
      if filename == nil
        filename = "untitled.txt"
      end
      
      return filename
    end
    
    def persist(url)
      File.open(@@last_url_filename, 'w') do |f|
        f.puts url
      end
      url
    end
    
    def read_files(filenames)
      params = {}
      for filename in filenames
        basename = File.basename(filename)
        if File.readable?(filename)
          params["files[#{basename}]"] = File.open(filename).read.chomp
        else
          raise "Error: unable to read #{basename}"
        end
      end
      params
    end
    
    def fake_file(filename, content)
      {"files[#{filename}]" => content}
    end
    
    def build_params(filenames, private_gist)
      filenames.merge({
        :login => ENV['USERNAME'],
        :token => ENV['PASSWORD'],
      }).merge(private_gist ? { 'private' => 'true' } : {})
    end
    
  end
end

# DZ events
 
def dragged
  $dz.determinate(false)
  $dz.begin("Creating Gist...")
  begin
    case ENV['DRAGGED_TYPE']
      when 'NSStringPboardType'
        url = Gist.post_text($items[0], ENV['KEY_MODIFIERS'] == "")
      when 'NSFilenamesPboardType'
        url = Gist.post_files($items, ENV['KEY_MODIFIERS'] == "")
    end
    $dz.finish("URL is now on clipboard")
    $dz.url(url)
  rescue Exception => e
    $dz.finish("Error uploading Gist! %s" % e)
    $dz.url(false)
    exit
  end
  
end

def clicked
  url = Gist.get_last_url
  $dz.finish("URL is now on clipboard")
  $dz.url(url)
  system("open #{url}")
end