From 058b80f721b9dbaca7aa366a980d7d3014a01157 Mon Sep 17 00:00:00 2001
From: Paul van Tilburg <paul@mozcode.nl>
Date: Fri, 28 Sep 2012 11:57:14 +0200
Subject: [PATCH] Add Invoice#vat_summary to return a VAT summary grouped by
 VAT rate

---
 stoptime.rb | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/stoptime.rb b/stoptime.rb
index f0120cd..557ef26 100644
--- a/stoptime.rb
+++ b/stoptime.rb
@@ -358,6 +358,16 @@ module StopTime::Models
       return summ
     end
 
+    # Returns a total per VAT rate of the contained tasks (Hash of Float to
+    # Fixnum).
+    def vat_summary
+      vatsumm = Hash.new(0.0)
+      summary.each do |task, summ|
+        vatsumm[task.vat_rate] += summ[3]
+      end
+      return vatsumm
+    end
+
     # Returns the invoice period based on the contained tasks (Array of Time).
     # See also Task#bill_period.
     def period