lib/hanko/fingerprint.rb in hanko-0.1.5 vs lib/hanko/fingerprint.rb in hanko-0.1.6

@@ -1,11 +1,11 @@
 require 'digest/sha2'
 
 module Hanko
   class Fingerprint
     class << self
-      attr_writer :digest_class, :cachable
+      attr_writer :cachable, :prefix, :suffix
 
       def pon(assets_dir, source)
         if cachable?
           cached_pon[source] ||= generate_pon(assets_dir, source)
         else
@@ -24,22 +24,36 @@
         @cached_pon ||= {}
       end
 
       def generate_pon(assets_dir, source)
         path = File.join(assets_dir || '', source)
-        File.file?(path) ? file_digest(path) : ''
+        return '' unless File.file?(path)
+        fp = file_digest(path)
+        fp = "#{prefix}#{fp}" if prefix
+        fp = "#{fp}#{suffix}" if suffix
+        fp
       end
 
       def file_digest(path)
         digest_class.file(path).hexdigest
       end
 
       def digest_class
-        @digest_class || ::Digest::SHA256
+        return @digest_class if defined?(@digest_class)
+        ::Digest::SHA256
       end
 
       def cachable?
-        @cachable != false
+        return @cachable if defined?(@cachable)
+        true
+      end
+
+      def prefix
+        @prefix if defined?(@prefix)
+      end
+
+      def suffix
+        @suffix if defined?(@suffix)
       end
     end
   end
 end