From 3ffac4e77a118ee6ec7d369b0250c11830c2f7e0 Mon Sep 17 00:00:00 2001
From: jessib <jessib@leap.se>
Date: Tue, 12 Mar 2013 13:32:46 -0700
Subject: Basic functionality for one time transactions using Braintree's
 transparent redirect API based from
 https://github.com/braintree/braintree_ruby_examples/tree/master/rails3_tr_checkout
 (very little changes were required)

---
 billing/app/helpers/braintree_helper.rb | 50 +++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 billing/app/helpers/braintree_helper.rb

(limited to 'billing/app/helpers/braintree_helper.rb')

diff --git a/billing/app/helpers/braintree_helper.rb b/billing/app/helpers/braintree_helper.rb
new file mode 100644
index 0000000..3d6e887
--- /dev/null
+++ b/billing/app/helpers/braintree_helper.rb
@@ -0,0 +1,50 @@
+module BraintreeHelper
+  class BraintreeFormBuilder < ActionView::Helpers::FormBuilder
+    include ActionView::Helpers::AssetTagHelper
+    include ActionView::Helpers::TagHelper
+
+    def initialize(object_name, object, template, options, proc)
+      super
+      @braintree_params = @options[:params]
+      @braintree_errors = @options[:errors]
+    end
+
+    def fields_for(record_name, *args, &block)
+      options = args.extract_options!
+      options[:builder] = BraintreeFormBuilder
+      options[:params] = @braintree_params && @braintree_params[record_name]
+      options[:errors] = @braintree_errors && @braintree_errors.for(record_name)
+      new_args = args + [options]
+      super record_name, *new_args, &block
+    end
+
+    def text_field(method, options = {})
+      has_errors = @braintree_errors && @braintree_errors.on(method).any?
+      field = super(method, options.merge(:value => determine_value(method)))
+      result = content_tag("div", field, :class => has_errors ? "fieldWithErrors" : "")
+      result.safe_concat validation_errors(method)
+      result
+    end
+
+    protected
+
+    def determine_value(method)
+      if @braintree_params
+        @braintree_params[method]
+      else
+        nil
+      end
+    end
+
+    def validation_errors(method)
+      if @braintree_errors && @braintree_errors.on(method).any?
+        @braintree_errors.on(method).map do |error|
+          content_tag("div", ERB::Util.h(error.message), {:style => "color: red;"})
+        end.join
+      else
+        ""
+      end
+    end
+  end
+end
+
-- 
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