Sample strategy

strategy_sample.rb

module Template
  class JsonInputStrategy < Template::InputStrategy

    def parse_request_input
      begin
        JSON.parse(request_input)
      rescue JSON::ParserError
        {}
      end
    end
  end
end

class InputProcessor
  include ActiveModel::Model
  attr_accessor :request_input, :input_type

  def processor
    @processor ||= case input_type
      when Template::INPUT_TYPES[:csv]
        Template::CsvInputStrategy.new(request_input: request_input)
      when Template::INPUT_TYPES[:xml]
        Template::XmlInputStrategy.new(request_input: request_input)
      else
        Template::JsonInputStrategy.new(request_input: request_input)
      end
    end
  end
end