Twitter bot on Heroku

app.rb

require 'rubygems'
require 'sinatra'
require_relative './tweet.rb'
get '/' do
  "under construction"
end
get '/random_tweet' do
#  Tweet.new.random_tweet  # 動作チェックが終わったらコメントアウトすること
end

config.ru

require_relative './app.rb'
run Sinatra::Application

Gemfile

ruby '2.1.4'
source 'https://rubygems.org'
gem 'sinatra'
gem 'twitter'

task.rb

require_relative './tweet.rb'
Tweet.new.daily_tweet

tweet.rb

require 'rubygems'
require 'twitter'
class Tweet
  def initialize
    @text = <<-EOF.split("\n")
# ここに31行分のテキストを入れる
EOF

    @client = Twitter::REST::Client.new do |config|
      config.consumer_key        = 'YOUR_CONSUMER_KEY'
      config.consumer_secret     = 'YOUR_CONSUMER_SECRET'
      config.access_token        = 'YOUR_ACCESS_TOKEN'
      config.access_token_secret = 'YOUR_ACCESS_SECRET'
    end

  end
  def random_tweet
    tweet = @text[rand(@text.length)]
    update(tweet)
  end
  def daily_tweet
    tweet = @text[Time.now.day - 1]
    update(tweet)
  end
  private
  def update(tweet)
    return nil unless tweet
    begin
      @client.update(tweet.chomp)
    rescue => ex
      nil # todo
    end
  end
end