Module: Encryptor::ClassMethods

Defined in:
lib/encryptor.rb

Instance Method Summary collapse

Instance Method Details

#encrypted(attribute_name, encrypted_attribute_name = nil, key_name = nil) ⇒ Object

Preconditions

> attribute_name - symbol, it is the name of the virtual attribute you want to create

> (optional) encrypted_attribute_name - symbol, it is the name of the encrypted attribute

> (optional) key_name - symbol, it is the name of the key

Postconditions

> #attribute_name instance method is created and handles decryption

> #attribute_name= instance method is created and handles encryption



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# File 'lib/encryptor.rb', line 17

def encrypted(attribute_name, encrypted_attribute_name = nil, key_name = nil)
  encrypted_attribute_name = encrypted_attribute_name.present? ? encrypted_attribute_name : "encrypted_#{attribute_name}"
  key_name = key_name.present? ? key_name : "#{attribute_name}_key"

  class_eval do
    define_method :"#{attribute_name}" do
      decrypt(self.send(encrypted_attribute_name), self.send(key_name))
    end

    define_method :"#{attribute_name}=" do |value_to_encrypt|
      encrypted_parts = encrypt(value_to_encrypt)

      key = encrypted_parts[:key]
      encrypted_attribute = encrypted_parts[:encrypted_attribute]

      self.send("#{key_name}=", key)

      self.send("#{encrypted_attribute_name}=", encrypted_attribute)
    end
  end
end