class ActionView::Helpers::Tags::DateSelect

def datetime_selector(options, html_options)
  datetime = options.fetch(:selected) { value || default_datetime(options) }
  @auto_index ||= nil
  options = options.dup
  options[:field_name]           = @method_name
  options[:include_position]     = true
  options[:prefix]             ||= @object_name
  options[:index]                = @auto_index if @auto_index && !options.has_key?(:index)
  DateTimeSelector.new(datetime, options, html_options)
end

def default_datetime(options)
  return if options[:include_blank] || options[:prompt]
  case options[:default]
  when nil
    Time.current
  when Date, Time
    options[:default]
  else
    default = options[:default].dup
    # Rename :minute and :second to :min and :sec
    default[:min] ||= default[:minute]
    default[:sec] ||= default[:second]
    time = Time.current
    [:year, :month, :day, :hour, :min, :sec].each do |key|
      default[key] ||= time.public_send(key)
    end
    Time.utc(
      default[:year], default[:month], default[:day],
      default[:hour], default[:min], default[:sec]
    )
  end
end

def initialize(object_name, method_name, template_object, options, html_options)
  @html_options = html_options
  super(object_name, method_name, template_object, options)
end

def render
  error_wrapping(datetime_selector(@options, @html_options).public_send("select_#{select_type}").html_safe)
end

def select_type
  @select_type ||= name.split("::").last.sub("Select", "").downcase
end

def select_type
  self.class.select_type
end