lib/ssn/social_security_number.rb in ssn-0.2.0 vs lib/ssn/social_security_number.rb in ssn-0.3.0

@@ -1,5 +1,28 @@
 module Ssn
   class SocialSecurityNumber
+    FORMATTED_REGEX           = /^[0-9]{3}-?[0-9]{2}-?[0-9]{4}$/
+    UNFORMATTED_REGEX         = /^[0-9]{9}$/
+    UNFORMATTED_CAPTURE_REGEX = /^([0-9]{3})([0-9]{2})([0-9]{4})$/
 
+    attr_reader :raw
+
+    def initialize( value=nil )
+      return if value.nil?
+      @raw = SocialSecurityNumber.parse( value )
+    end
+
+    def formatted
+      return (raw.nil? || raw.empty?) ?
+        '' :
+        SocialSecurityNumber.format( raw )
+    end
+
+    def self.parse( value )
+      value.gsub( /-/, "" )
+    end
+
+    def self.format( value )
+      parse( value ).gsub( UNFORMATTED_CAPTURE_REGEX,"\\1-\\2-\\3" )
+    end
   end
 end
\ No newline at end of file