Added basic controller and helper code

lib/facebooker2.rb

@@ -1 +1,13 @@
 # Facebooker2
+module Facebooker2
+  
+  class << self
+    attr_accessor :api_key, :secret, :app_id
+  end
+
+end
+
+require "mogli"
+
+require "facebooker2/rails/controller"
+require "facebooker2/rails/helpers/facebook_connect"

lib/facebooker2/rails.rb

@@ -0,0 +1,4 @@
+module Facebooker2
+  module Rails
+  end
+end

lib/facebooker2/rails/controller.rb

@@ -0,0 +1,59 @@
+require "digest/md5"
+require "ruby-debug"
+module Facebooker2
+  module Rails
+    module Controller
+      
+      def current_facebook_user
+        fetch_client_and_user_from_cookie
+        @_current_facebook_user
+      end
+      
+      def current_facebook_client
+        fetch_client_and_user_from_cookie
+        @_current_facebook_client
+      end
+      
+      def fetch_client_and_user_from_cookie
+        return if @_fb_user_fetched
+        app_id = Facebooker2.app_id
+        if (hash_data = fb_cookie_hash_for_app_id(app_id)) and
+          fb_cookie_signature_correct?(fb_cookie_hash_for_app_id(app_id),Facebooker2.secret)
+          @_current_facebook_client = Mogli::Client.new(hash_data["access_token"],hash_data["expires"].to_i)
+          @_current_facebook_user = Mogli::User.new(:id=>hash_data["uid"])
+          @_current_facebook_user.client = @_current_facebook_client
+        end
+        @_fb_user_fetched = true
+      end
+      
+      def fb_cookie_hash_for_app_id(app_id)
+        return nil unless fb_cookie_for_app_id?(app_id)
+        hash={}
+        data = fb_cookie_for_app_id(app_id)
+        data.split("&").each do |str|
+          parts = str.split("=")
+          hash[parts.first] = parts.last
+        end
+        hash
+      end
+      
+      def fb_cookie_for_app_id?(app_id)
+        !fb_cookie_for_app_id(app_id).nil?
+      end
+      
+      def fb_cookie_for_app_id(app_id)
+        cookies["fbs_#{app_id}"]
+      end
+      
+      def fb_cookie_signature_correct?(hash,secret)
+        sorted_keys = hash.keys.reject {|k| k=="sig"}.sort
+        test_string = ""
+        sorted_keys.each do |key|
+          test_string += "#{key}=#{hash[key]}"
+        end
+        test_string += secret
+        Digest::MD5.hexdigest(test_string) == hash["sig"]
+      end
+    end
+  end
+end

lib/facebooker2/rails/helpers/facebook_connect.rb

@@ -0,0 +1,45 @@
+module Facebooker2
+  module Rails
+    module Helpers
+      module FacebookConnect 
+        #
+        # Render an <fb:login-button> element, similar to
+        # fb_login_button. Adds a js redirect to the onlogin event via rjs.
+        #
+        # ==== Examples
+        #
+        #   fb_login_and_redirect '/other_page'
+        #   => <fb:login-button onlogin="window.location.href = &quot;/other_page&quot;;"></fb:login-button>
+        #
+        # Like #fb_login_button, this also supports the :text option
+        #
+        #   fb_login_and_redirect '/other_page', :text => "Login with Facebook", :v => '2'
+        #   => <fb:login-button onlogin="window.location.href = &quot;/other_page&quot;;" v="2">Login with Facebook</fb:login-button>
+        #
+        def fb_login_and_redirect(url, options = {})
+          js = update_page do |page|
+            page.redirect_to url
+          end
+
+          text = options.delete(:text)
+          
+          content_tag("fb:login-button",text,options.merge(:onlogin=>js))
+        end
+        
+        #
+        # Logs the user out of facebook and redirects to the given URL
+        #  args are passed to the call to link_to_function
+        def fb_logout_link(text,url,*args)
+          function= "FB.logout(function() {window.location.href = '#{url}';})"
+          link_to_function text, function, *args
+        end
+        
+        def fb_server_fbml(style=nil,&proc)
+          style_string=" style=\"#{style}\"" if style
+          content = capture(&proc)
+          concat("<fb:serverFbml#{style_string}><script type='text/fbml'>#{content}</script></fb:serverFbml>")
+        end
+      end
+    end
+  end
+end

spec/facebooker2_spec.rb

@@ -0,0 +1,20 @@
+require "spec_helper"
+describe Facebooker2 do
+  
+  describe "Configuration" do
+    it "allows setting of the api_key" do
+      Facebooker2.api_key = "123456"
+      Facebooker2.api_key.should == "123456"
+    end
+    
+    it "allows setting of the secret" do
+      Facebooker2.secret = "mysecret"
+      Facebooker2.secret.should == "mysecret"
+    end
+    
+    it "has an app_id" do
+      Facebooker2.app_id = "12345"
+      Facebooker2.app_id.should == "12345"      
+    end
+  end
+end

spec/helpers/facebook_connect_spec.rb

@@ -0,0 +1,49 @@
+require "spec_helper"
+require "ruby-debug"
+describe Facebooker2::Rails::Helpers::FacebookConnect, :type=>:helper do
+  include Facebooker2::Rails::Helpers::FacebookConnect
+  describe "fb_login_and_redirect" do
+    it "renders a login button" do
+      fb_login_and_redirect("/").should == 
+        "<fb:login-button onlogin=\"window.location.href = &quot;/&quot;;\"></fb:login-button>"
+    end
+    
+    it "allows you to specify the text of the button" do
+      fb_login_and_redirect("/",:text=>"my test").should == 
+        "<fb:login-button onlogin=\"window.location.href = &quot;/&quot;;\">my test</fb:login-button>"      
+    end
+  end
+  
+  describe "Logging out" do
+    it "has an fb_logout_link" do
+      fb_logout_link("logout","/").should == 
+        "<a href=\"#\" onclick=\"FB.logout(function() {window.location.href = '/';}); return false;\">logout</a>"
+    end
+  end
+  
+  describe "server FBML" do
+    it "renders the yielded content inside of an fbml block" do
+      fb_server_fbml do
+        
+      end
+      output_buffer.should == "<fb:serverFbml><script type='text/fbml'></script></fb:serverFbml>"
+    end
+    
+    it "includes the content inside the block" do
+      fb_server_fbml do
+        "inner text"
+      end
+      output_buffer.should == "<fb:serverFbml><script type='text/fbml'>inner text</script></fb:serverFbml>"      
+    end
+    
+    it "allows specifying style attributes" do
+      fb_server_fbml "width: 750px;" do
+        
+      end
+      output_buffer.should == "<fb:serverFbml style=\"width: 750px;\"><script type='text/fbml'></script></fb:serverFbml>"
+      
+    end
+  end
+  
+end
+

spec/rails/controller_spec.rb

@@ -0,0 +1,88 @@
+require "spec_helper"
+
+class FakeController
+  include Facebooker2::Rails::Controller
+end
+
+describe Facebooker2::Rails::Controller do
+  before(:each) do
+    Facebooker2.app_id = "12345"
+    Facebooker2.secret = "42ca6de519d53f6e0420247a4d108d90"
+  end
+  describe "Cookie handling" do
+    let :controller do
+      controller = FakeController.new
+      controller.stub!(:cookies).and_return("fbs_12345"=>"access_token=114355055262088|57f0206b01ad48bf84ac86f1-12451752|63WyZjRQbzowpN8ibdIfrsg80OA.&expires=0&secret=1e3375dcc4527e7ead0f82c095421690&session_key=57f0206b01ad48bf84ac86f1-12451752&sig=4337fcdee4cc68bb70ec495c0eebf89c&uid=12451752")
+      controller
+    end
+    
+    it "knows if a cookie exists for this app" do
+      controller.fb_cookie_for_app_id?(12345).should be_true
+    end
+    
+    it "knows when there isn't a cookie" do
+      controller.fb_cookie_for_app_id?(432432).should be_false      
+    end
+    
+    it "gets the hash from the cookie" do
+      controller.stub!(:cookies).and_return("fbs_12345"=>"param1=val1&param2=val2")
+      controller.fb_cookie_hash_for_app_id(12345).should == {"param1"=>"val1", "param2"=>"val2"}
+    end
+    
+    it "creates a user from the cookie" do
+      controller.current_facebook_user.should_not be_nil
+      controller.current_facebook_user.should be_an_instance_of(Mogli::User)
+      controller.current_facebook_user.id.should == "12451752"      
+    end
+    
+    it "doesn't create a user if there is no app cookie" do
+      Facebooker2.app_id="other_app"
+      controller.current_facebook_user.should be_nil
+    end
+    
+    it "creates a client from the cookie" do
+      controller.current_facebook_client.should_not be_nil
+      controller.current_facebook_client.should be_an_instance_of(Mogli::Client)
+      controller.current_facebook_client.access_token.should == "114355055262088|57f0206b01ad48bf84ac86f1-12451752|63WyZjRQbzowpN8ibdIfrsg80OA."
+    end
+    
+    it "verifies that the signature is correct" do
+      controller.fb_cookie_signature_correct?({
+        "access_token"      =>  "114355055262088|57f0206b01ad48bf84ac86f1-12451752|63WyZjRQbzowpN8ibdIfrsg80OA.",
+        "expires"           =>  "0",
+        "secret"            =>  "1e3375dcc4527e7ead0f82c095421690",
+        "session_key"       =>  "57f0206b01ad48bf84ac86f1-12451752",
+        "uid"               =>  "12451752",
+        "sig"               =>  "4337fcdee4cc68bb70ec495c0eebf89c"},
+        "42ca6de519d53f6e0420247a4d108d90"
+        ).should be_true
+    end
+    
+    it "returns false if the signature is not correct" do
+      controller.fb_cookie_signature_correct?({
+        "access_token"      =>  "114355055262088|57f0206b01ad48bf84ac86f1-12451752|63WyZjRQbzowpN8ibdIfrsg80OA.",
+        "expires"           =>  "0",
+        "secret"            =>  "1e3375dcc4527e7ead0f82c095421690",
+        "session_key"       =>  "57f0206b01ad48bf84ac86f1-12451752",
+        "uid"               =>  "5436785463785",
+        "sig"               =>  "4337fcdee4cc68bb70ec495c0eebf89c"},
+        "42ca6de519d53f6e0420247a4d108d90"
+        ).should be_false
+      
+    end
+    
+    
+  end
+  
+  describe "Methods" do
+    it "has a current_facebook_user" do
+      
+    end
+    
+    it "has a current_facebook_client" do
+      
+    end
+    
+  end
+  
+end

spec/spec_helper.rb

@@ -0,0 +1,26 @@
+require "rubygems"
+require "active_support"
+require "action_pack"
+require "action_view"
+require "action_controller"
+require 'action_controller/test_process'
+require 'action_controller/integration'
+require 'active_support/test_case'
+require 'spec/test/unit'
+
+
+require "facebooker2"
+gem "rspec-rails"
+
+#required because view tests need a controller
+class ApplicationController < ActionController::Base
+end
+
+#load just the files needed for helper tests so that we don't need a full rails stack
+require "spec/rails/example/functional_example_group"
+require "spec/rails/example/helper_example_group"
+require 'spec/rails/interop/testcase'
+
+Spec::Example::ExampleGroupFactory.default(ActiveSupport::TestCase)
+
+