gistfile1.rb

def select_datetime_range(object_name, method, max_time, scheduled_at = nil)
    if scheduled_at
      default_date, default_hour = @thing.scheduled_at.strftime("%Y-%m-%d"), @thing.scheduled_at.hour
    else
      default_date, default_hour = "prompt", "prompt"
    end
    hours = [["Time", "prompt"]] + (0..23).collect { |hour| [("0" + hour.to_s)[-2, 2] + ":00", hour] }
    html = ""
    days = [["Date", "prompt"]] + (Time.now..max_time).step(1.day).collect { |day| [day.strftime("%b %d"), day.strftime("%Y-%m-%d")] }
    html << select_tag("#{object_name}_#{method}_date", options_for_select(days, default_date), { :name => "#{object_name}[#{method}[date]" })
    html << " &mdash; "
    html <<  select_tag("#{object_name}_#{method}_hour", options_for_select(hours, default_hour), { :name => "#{object_name}[#{method}[time]" })
    html
  end