polter.rb

require 'capybara/poltergeist'
require 'nokogiri'
require 'time'
require 'pry'

class YourNameFinder
  class Base
    attr_accessor :date, :time, :session
    def initialize(date, time)
      @date = date
      @time = time

      Capybara.register_driver :poltergeist do |app|
        Capybara::Poltergeist::Driver.new(app, {:js_errors => false, :timeout => 5000 })
      end
      Capybara.javascript_driver = :poltergeist
      @session = Capybara::Session.new(:poltergeist)

      @session.driver.headers = {
        'User-Agent' => "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2564.97 Safari/537.36"
      }
    end

    def schedules
    end

    private
    def select_date
    end
  end
end

class Schedule
  attr_accessor :cinema, :date, :time, :seats
  def initialize(cinema, date, time, seats)
    @cinema = cinema
    @date   = date
    @time   = time
    @seats  = seats
  end

  # seatsを分ける。
  def split
  end
end

# Scheduleインスタンスの集合
class Schedule::Set
end



class Toho < YourNameFinder::Base
  def schedules

    select_date

    schedule = Nokogiri::HTML.parse(@session.html).css('.schedule-body-section-item').select do |schedule|
      schedule.children[1].children[1].children[0].text == '君の名は。'
    end[0]

    schedule
      .css('.schedule-item.white')
      .map do |white_schedule|
        start = Time.parse("#{@date} #{white_schedule.css('a > .time > .start')[0].children.text}")
        if Time.parse("#{@date} #{@time[0]}") < start && start < Time.parse("#{@date} #{@time[1]}")
          @session.execute_script white_schedule.children[0].attributes['href'].value
          sleep 3

          # 空き席一覧
          seats = Nokogiri::HTML(@session.html)
                    .xpath("//table//tbody//tr")
                    .map do |tr|
                      tr.children.select do |td|
                          td.children.count >= 1 &&
                          td.children[0].respond_to?(:attributes) &&
                          td.children[0].attributes.key?('alt') &&
                          td.children[0].attributes['alt'].value.include?('空席')
                      end
                    end
                    .map do |tr|
                      tr.map {|td| td.children[0].attributes['alt'].value}
                    end
                    .select do |tr|
                      tr.size >= 1
                    end

          Schedule.new(:toho, @date, start, seats)
	end
     end
     .select{|s| s}
  end

  private

  def select_date
    @session.visit "https://hlo.tohotheater.jp/net/schedule/076/TNPI2000J01.do"
    @session.execute_script "$('##{@date}').trigger('click')"
    sleep 5
  end
end

s = Toho.new('20161003', ['18:00', '22:30']).schedules
binding.pry