string.rb in dionysus-0.3.0

- old
+ new

@@ -4,10 +4,13 @@
 ##
 # Adds string encoding convenience methods.
 #
 #     require 'dionysus/string'
 class String
+  HEX_REGEXP = /^[a-f0-9]+$/
+  BASE64_REGEXP = /^[A-Za-z0-9\+\/\=]+$/
+  
   ##
   # Encode the Base64 (without newlines)
   def encode64s() Base64.encode64s(self); end
   
   ##
@@ -25,6 +28,20 @@
   
   ##
   # Decode from hexidecimal
   def decode_hexidecimal() [self].pack('H*'); end
   alias_method :decode_hex, :decode_hexidecimal
+  
+  ##
+  # Detect the encoding of the string
+  def detect_encoding
+    return nil if blank?
+
+    if match(HEX_REGEXP)
+      :hex
+    elsif match(BASE64_REGEXP)
+      :base64
+    else
+      :binary
+    end
+  end
 end