1 files changed, 49 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/number_helper/number_to_phone_converter.rb b/activesupport/lib/active_support/number_helper/number_to_phone_converter.rb
new file mode 100644
index 0000000000..af2ee56d91
--- /dev/null
+++ b/activesupport/lib/active_support/number_helper/number_to_phone_converter.rb
@@ -0,0 +1,49 @@
+module ActiveSupport
+  module NumberHelper
+    class NumberToPhoneConverter < NumberConverter #:nodoc:
+      def convert
+        str  = country_code(opts[:country_code])
+        str << convert_to_phone_number(number.to_s.strip)
+        str << phone_ext(opts[:extension])
+      end
+
+      private
+
+        def convert_to_phone_number(number)
+          if opts[:area_code]
+            convert_with_area_code(number)
+          else
+            convert_without_area_code(number)
+          end
+        end
+
+        def convert_with_area_code(number)
+          number.gsub!(/(\d{1,3})(\d{3})(\d{4}$)/,"(\\1) \\2#{delimiter}\\3")
+          number
+        end
+
+        def convert_without_area_code(number)
+          number.gsub!(/(\d{0,3})(\d{3})(\d{4})$/,"\\1#{delimiter}\\2#{delimiter}\\3")
+          number.slice!(0, 1) if start_with_delimiter?(number)
+          number
+        end
+
+        def start_with_delimiter?(number)
+          delimiter.present? && number.start_with?(delimiter)
+        end
+
+        def delimiter
+          opts[:delimiter] || "-"
+        end
+
+        def country_code(code)
+          code.blank? ? "" : "+#{code}#{delimiter}"
+        end
+
+        def phone_ext(ext)
+          ext.blank? ? "" : " x #{ext}"
+        end
+    end
+  end
+end
+