vendor/plugins/facebooker/lib/facebooker/mock/service.rb

   1 require 'digest/md5'
   2 require 'facebooker/service'
   3
   4 module Facebooker
   5   # A mock service that reads the Facebook response from fixtures
   6   # Adapted from http://gist.github.com/44344
   7   #
   8   #   Facebooker::MockService.fixture_path = 'path/to/dir'
   9   #   Facebooker::Session.current = Facebooker::MockSession.create
  10   #
  11   class MockService < Service
  12     class << self
  13       attr_accessor :fixture_path
  14     end
  15
  16     def read_fixture(method, filename, original = nil)
  17       path = fixture_path(method, filename)
  18       File.read path
  19     rescue Errno::ENAMETOOLONG
  20       read_fixture(method, hash_fixture_name(filename), filename)
  21     rescue Errno::ENOENT => e
  22       if File.exists?(fixture_path(method, 'default'))
  23         File.read fixture_path(method, 'default')
  24       else
  25         e.message << "\n(Non-hashed path is #{original})" if original
  26         e.message << "\nFacebook API Reference: http://wiki.developers.facebook.com/index.php/#{method.sub(/^facebook\./, '')}#Example_Return_XML"
  27         raise e
  28       end
  29     end
  30
  31     def post(params)
  32       method = params.delete(:method)
  33       params.delete_if {|k,_| [:v, :api_key, :call_id, :sig].include?(k) }
  34       Parser.parse(method, read_fixture(method, fixture_name(params)))
  35     end
  36
  37   private
  38     def fixture_path(method, filename)
  39       File.join(self.class.fixture_path, method, "#{filename}.xml")
  40     end
  41
  42     def hash_fixture_name(filename)
  43       Digest::MD5.hexdigest(filename)
  44     end
  45
  46     def fixture_name(params)
  47       params.map {|*args| args.join('=') }.sort.join('&')
  48     end
  49   end
  50 end