[PATCH aggregator] Integration of rack-restful_submit

This patch isn't for review but just for people working on new UI in
this sprint (p2-s2). This patch adds:

1) Possibility to pass options to submit_tag()
2) RSpec tests for restful_submit_tag() helper

-- Ladislav

From: Ladislav Martincik <lmartinc(a)redhat.com&gt;

---
 src/app/helpers/application_helper.rb       |   18 +++++++++++++
 src/config/environment.rb                   |    3 ++
 src/spec/helpers/application_helper_spec.rb |   37 +++++++++++++++++++++++++++
 3 files changed, 58 insertions(+), 0 deletions(-)
 create mode 100644 src/spec/helpers/application_helper_spec.rb

diff --git a/src/app/helpers/application_helper.rb
b/src/app/helpers/application_helper.rb
index e48851c..456a02e 100644
--- a/src/app/helpers/application_helper.rb
+++ b/src/app/helpers/application_helper.rb
@@ -172,4 +172,22 @@ module ApplicationHelper
       end
     end
   end
+
+  # Integration of rack-restful_submit convention to be able to call
+  # RESTful resources defined by Rails conventions without Javascript.
+  #
+  # Method generates 3 tags:
+  # * 2 hidden field tags to define URL and METHOD to be forwared to in RESTful env.
+  # * 1 submit field to trigger the form submission defining the action
+  #
+  # Example:
+  #   <tt>restful_submit_tag('Delete', 'destroy',
instance_path(@instance), 'DELETE')</tt>
+  #
+  # Learn more: https://github.com/martincik/rack-restful_submit
+  def restful_submit_tag(value, action, url, method, options = {})
+    hidden_field_tag("__map[#{action}][url]", url) <<
+    hidden_field_tag("__map[#{action}][method]", method.upcase) <<
+    submit_tag(value, {:name =>
"__rewrite[#{action}]"}.reverse_merge!(options))
+  end
+
 end
diff --git a/src/config/environment.rb b/src/config/environment.rb
index 7d8ba2c..07c0ea0 100644
--- a/src/config/environment.rb
+++ b/src/config/environment.rb
@@ -52,6 +52,9 @@ Rails::Initializer.run do |config|
   config.gem "simple-navigation"
   config.gem "typhoeus"
   config.gem "rb-inotify"
+  config.gem 'rack-restful_submit'
+
+  config.middleware.insert_after Rack::MethodOverride, 'Rack::RestfulSubmit'
 
   config.active_record.observers = :instance_observer, :task_observer
   # Only load the plugins named here, in the order given. By default, all plugins
diff --git a/src/spec/helpers/application_helper_spec.rb
b/src/spec/helpers/application_helper_spec.rb
new file mode 100644
index 0000000..fe5c956
--- /dev/null
+++ b/src/spec/helpers/application_helper_spec.rb
@@ -0,0 +1,37 @@
+require 'spec_helper'
+
+describe ApplicationHelper do
+  include ApplicationHelper
+
+  context "restful_submit_tag() helper" do
+
+    it "contains mapping as hidden fields" do
+      html = restful_submit_tag('Delete', 'destroy',
'destroy_url', 'DELETE')
+      doc = Nokogiri::HTML(html)
+      nodes = (doc/"input[@type='hidden']")
+
+      nodes.each do |node|
+        ['__map[destroy][url]',
'__map[destroy][method]'].include?(node['name']).should be_true
+      end
+    end
+
+    it "with no options" do
+      html = restful_submit_tag('Delete', 'destroy',
'destroy_url', 'DELETE')
+      doc = Nokogiri::HTML(html)
+      node = (doc/"input[@type='submit']")
+
+      node.first['name'].should == '__rewrite[destroy]'
+    end
+
+    it "with options" do
+      html = restful_submit_tag('Delete', 'destroy',
'destroy_url', 'DELETE', :id => 'delete', :name =>
'test')
+      doc = Nokogiri::HTML(html)
+      node = (doc/"input[@type='submit']")
+
+      node.first['name'].should == '__rewrite[destroy]'
+      node.first['id'].should == 'delete'
+    end
+
+  end
+
+end
-- 
1.7.3.2