From bab9d6b8a79df9e6905aa49b5ad6f3534354ffe1 Mon Sep 17 00:00:00 2001
From: Holger Hans Peter Freyther <zecke@selfish.org>
Date: Fri, 2 Dec 2011 21:37:42 +0100
Subject: [PATCH] payment: Add a button to easily adjust the payment

In case the payment calculation is off.. one can manipulate the
adjustments and then press the adjust button to make the payment
match the total. PayPal allows to capture up to 115%.
---
 .../spree/billing_integration/paypal_express_base.rb      | 8 +++++++-
 app/models/spree/paypal_account.rb                        | 6 +++++-
 config/locales/en.yml                                     | 1 +
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/app/models/spree/billing_integration/paypal_express_base.rb b/app/models/spree/billing_integration/paypal_express_base.rb
index 393dfb3..f326a5a 100644
--- a/app/models/spree/billing_integration/paypal_express_base.rb
+++ b/app/models/spree/billing_integration/paypal_express_base.rb
@@ -33,6 +33,12 @@ class Spree::BillingIntegration::PaypalExpressBase < Spree::BillingIntegration
     provider.credit(amount, response_code, :currency => preferred_currency)
   end
 
+  def adjust(payment, account_or_response_code, gateway_options)
+    payment.amount = payment.order.total
+    payment.save
+  end
+
+
   def find_authorization(payment)
     logs = payment.log_entries.all(:order => 'created_at DESC')
     logs.each do |log|
@@ -60,4 +66,4 @@ class Spree::BillingIntegration::PaypalExpressBase < Spree::BillingIntegration
     (100 * amount).to_i
   end
 
-end
\ No newline at end of file
+end
diff --git a/app/models/spree/paypal_account.rb b/app/models/spree/paypal_account.rb
index 8980ab1..be03636 100644
--- a/app/models/spree/paypal_account.rb
+++ b/app/models/spree/paypal_account.rb
@@ -3,13 +3,17 @@ class Spree::PaypalAccount < ActiveRecord::Base
   has_many :payments, :as => :source
 
   def actions
-    %w{capture credit}
+    %w{capture credit adjust}
   end
 
   def can_capture?(payment)
     !echeck?(payment) && payment.state == "pending"
   end
 
+  def can_adjust?(payment)
+    can_capture?(payment)
+  end
+
   def can_credit?(payment)
     return false unless payment.state == "completed"
     return false unless payment.order.payment_state == "credit_owed"
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 423c8df..bb8c445 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -23,6 +23,7 @@ en:
     verified: verified
     unverified: unverified
   comment: Comment
+  adjust: Adjust
   account_details: Account Details
   finalize:
     paypalexpress: Capture Payment