notify_subscription_items.rb

require 'date'
require 'mail'
require 'json'

notify_term = 5

File.open("item-list.json", "r+") do |f|
  f.each_line { |line|
    item = JSON.parse(line)

    case item["shop"]
    when "Amazon"
      shop_url = "https://www.amazon.co.jp/"
    when "Rakuten"
      shop_url = "https://www.rakuten.co.jp/"
    when "Yodobashi"
      shop_url = "http://yodobashi.com/"
    when "スーパー"
      shop_url = "(自分で買いに行ってね)"
    else
      shop_url = "(自分で調べてね)"
    end

    # Mail Settings
    mail = Mail.new do
      from     'from@example.com'
      to       'to@example.com'
      subject  '[オキニ] ' + item["name"] + ' 購入時期です'
      body     item["name"] + ' を ' + item["shop"] + ' ' + shop_url + ' で買ってね。'
    end

    options = { :address     => 'smtp.gmail.com',
      :port                  => 587,
      :domain                => 'gmail.com',
      :user_name             => 'from@example.com',
      :password              => 'PUT YOUR PASSWORD',
      :authentication        => :plain,
      :enable_starttls_auto  => true  }

      mail.charset = 'utf-8'
      mail.delivery_method(:smtp, options)

    # Send Mail
    if Date.parse(item["updated_date"]) + item["cycle"] - notify_term < Date.today
      mail.deliver
    else
      p "購入時期に該当しませんでした。 " + item["name"]
    end

  }
end