3 files changed, 184 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/helpers.rb b/actionpack/lib/action_view/helpers.rb
index c1c0eb59ae..652561f7f8 100644
--- a/actionpack/lib/action_view/helpers.rb
+++ b/actionpack/lib/action_view/helpers.rb
@@ -1,6 +1,7 @@
 module ActionView #:nodoc:
   module Helpers #:nodoc:
     autoload :ActiveModelHelper, 'action_view/helpers/active_model_helper'
+    autoload :AjaxHelper, 'action_view/helpers/ajax_helper'
     autoload :AssetTagHelper, 'action_view/helpers/asset_tag_helper'
     autoload :AtomFeedHelper, 'action_view/helpers/atom_feed_helper'
     autoload :BenchmarkHelper, 'action_view/helpers/benchmark_helper'
diff --git a/actionpack/lib/action_view/helpers/ajax_helper.rb b/actionpack/lib/action_view/helpers/ajax_helper.rb
new file mode 100644
index 0000000000..9cc2acc239
--- /dev/null
+++ b/actionpack/lib/action_view/helpers/ajax_helper.rb
@@ -0,0 +1,68 @@
+module ActionView
+  module Helpers
+    module AjaxHelper
+      include UrlHelper
+      
+      def link_to_remote(name, url, options = {})
+        html = options.delete(:html) || {}
+        
+        update = options.delete(:update)
+        if update.is_a?(Hash)
+          html["data-update-success"] = update[:success]
+          html["data-update-failure"] = update[:failure]
+        else
+          html["data-update-success"] = update
+        end
+
+        html["data-update-position"] = options.delete(:position)
+        html["data-method"]          = options.delete(:method)
+        html["data-remote"]          = "true"
+        
+        html.merge!(options)
+        
+        url = url_for(url) if url.is_a?(Hash)
+        link_to(name, url, html)
+      end
+      
+      def button_to_remote(name, options = {}, html_options = {})
+        url = options.delete(:url)
+        url = url_for(url) if url.is_a?(Hash)
+        
+        html_options.merge!(:type => "button", :value => name,
+          :"data-url" => url)
+        
+        tag(:input, html_options)
+      end
+      
+      module Rails2Compatibility
+        def set_callbacks(options, html)
+          [:complete, :failure, :success, :interactive, :loaded, :loading].each do |type|
+            html["data-#{type}-code"]  = options.delete(type.to_sym)
+          end
+
+          options.each do |option, value|
+            if option.is_a?(Integer)
+              html["data-#{option}-code"] = options.delete(option)
+            end
+          end
+        end
+        
+        def link_to_remote(name, url, options = nil)
+          if !options && url.is_a?(Hash) && url.key?(:url)
+            url, options = url.delete(:url), url
+          end
+          
+          set_callbacks(options, options[:html] ||= {})
+          
+          super
+        end
+        
+        def button_to_remote(name, options = {}, html_options = {})
+          set_callbacks(options, html_options)
+          super
+        end
+      end
+      
+    end
+  end
+end
+\ No newline at end of file
diff --git a/actionpack/test/javascript/ajax_test.rb b/actionpack/test/javascript/ajax_test.rb
new file mode 100644
index 0000000000..b67a91dad3
--- /dev/null
+++ b/actionpack/test/javascript/ajax_test.rb
@@ -0,0 +1,115 @@
+require "abstract_unit"
+
+class AjaxTestCase < ActiveSupport::TestCase
+  include ActionView::Helpers::AjaxHelper
+  include ActionView::Helpers::TagHelper
+
+  def assert_html(html, matches)
+    matches.each do |match|
+      assert_match Regexp.new(Regexp.escape(match)), html
+    end
+  end
+
+  def self.assert_callbacks_work(&blk)
+    define_method(:assert_callbacks_work, &blk)
+
+    [:complete, :failure, :success, :interactive, :loaded, :loading, 404].each do |callback|
+      test "#{callback} callback" do
+        markup = assert_callbacks_work(callback)
+        assert_html markup, %W(data-#{callback}-code="undoRequestCompleted\(request\)")
+      end
+    end
+  end
+end
+
+class LinkToRemoteTest < AjaxTestCase
+  def url_for(hash)
+    "/blog/destroy/4"
+  end
+
+  def link(options = {})
+    link_to_remote("Delete this post", "/blog/destroy/3", options)
+  end
+
+  test "with no update" do
+    assert_html link, %w(href="/blog/destroy/3" Delete\ this\ post data-remote="true")
+  end
+
+  test "basic" do
+    assert_html link(:update => "#posts"),
+      %w(data-update-success="#posts")
+  end
+
+  test "using a url hash" do
+    link = link_to_remote("Delete this post", {:controller => :blog}, :update => "#posts")
+    assert_html link, %w(href="/blog/destroy/4" data-update-success="#posts")
+  end
+
+  test "with :html options" do
+    expected = %{<a href="/blog/destroy/3" data-custom="me" data-update-success="#posts">Delete this post</a>}
+    assert_equal expected, link(:update => "#posts", :html => {"data-custom" => "me"})
+  end
+
+  test "with a hash for :update" do
+    link = link(:update => {:success => "#posts", :failure => "#error"})
+    assert_match /data-update-success="#posts"/, link
+    assert_match /data-update-failure="#error"/, link
+  end
+
+  test "with positional parameters" do
+    link = link(:position => :top, :update => "#posts")
+    assert_match /data\-update\-position="top"/, link
+  end
+
+  test "with an optional method" do
+    link = link(:method => "delete")
+    assert_match /data-method="delete"/, link
+  end
+
+  class LegacyLinkToRemoteTest < AjaxTestCase
+    include ActionView::Helpers::AjaxHelper::Rails2Compatibility
+
+    def link(options)
+      link_to_remote("Delete this post", "/blog/destroy/3", options)
+    end
+
+    test "basic link_to_remote with :url =>" do
+      expected = %{<a href="/blog/destroy/3" data-update-success="#posts">Delete this post</a>}
+      assert_equal expected,
+        link_to_remote("Delete this post", :url => "/blog/destroy/3", :update => "#posts")
+    end
+
+    assert_callbacks_work do |callback|
+      link(callback => "undoRequestCompleted(request)")
+    end
+  end
+end
+
+class ButtonToRemoteTest < AjaxTestCase
+  def button(options, html = {})
+    button_to_remote("Remote outpost", options, html)
+  end
+
+  def url_for(*)
+    "/whatnot"
+  end
+  
+  class StandardTest < ButtonToRemoteTest
+    test "basic" do
+      button = button({:url => {:action => "whatnot"}}, {:class => "fine"})
+      [/input/, /class="fine"/, /type="button"/, /value="Remote outpost"/,
+       /data-url="\/whatnot"/].each do |match|
+         assert_match match, button
+      end
+    end
+  end
+  
+  class LegacyButtonToRemoteTest < ButtonToRemoteTest
+    include ActionView::Helpers::AjaxHelper::Rails2Compatibility
+    
+    assert_callbacks_work do |callback|
+      button(callback => "undoRequestCompleted(request)")
+    end
+  end
+
+end
+\ No newline at end of file