encrypted_form_helper.rb

module ActionView
  module Helpers
    module FormHelper

      def encrypted_text_field(object_name, method, options = {})
        InstanceTag.new(object_name, method, self, options.delete(:object)).to_encrypted_input_field_tag("text", options)
      end

      class InstanceTag
        def to_encrypted_input_field_tag(field_type, options = {})
          options = options.stringify_keys
          options["size"] = options["maxlength"] || DEFAULT_FIELD_OPTIONS["size"] unless options.key?("size")
          options = DEFAULT_FIELD_OPTIONS.merge(options)
          if field_type == "hidden"
            options.delete("size")
          end
          options["type"]  ||= field_type
          options["value"] = options.fetch("value"){ value_before_type_cast(object) } unless field_type == "file"
          options["value"] &&= ERB::Util.html_escape(options["value"])
          add_default_name_and_id(options)
          tag("input", options.merge({ "data-encrypted-name" => options.delete("name") }))
        end
      end
    end

    class FormBuilder
      def encrypted_text_field(method, options = {})
        @template.encrypted_text_field(@object_name, method, objectify_options(options))
      end
    end
  end
end