smile-to-go.rb

require 'active_support/multibyte/chars'
require 'active_support/core_ext/string/inflections'
require 'json'
require 'httpi'
require 'nokogiri'

STG_CONTROL_FILE  = '.last-date'.freeze
STG_CHANNEL_URL   = 'https://hooks.slack.com/services/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'.freeze
STG_SKIPPED_MENUS = %w(Pastries Breakfast).freeze

STG_DESC_EXP = /\s?\(?V?\)? ?\(?(DF)?\)? ?\(?(GF)?\)? ?\(?N?\)?\z/

html = Nokogiri::HTML(HTTPI.get('https://www.smiletogonyc.com/location/howard-street/').body)
date = html.css('article header').text.strip.titleize

last_run_date = File.read(STG_CONTROL_FILE) rescue nil

exit if date == last_run_date

pages = html.css('script[type="application/ld+json"]').map { |script| JSON.parse(script) }
pages.select! { |pg| pg['@type'] == 'Menu' }

msg = "_#{date}_"

pages.each do |pg|
  menu = pg['hasMenuSection']
  menu = menu.first if Array === menu

  next if STG_SKIPPED_MENUS.include? pg['name']
  next unless Array === menu['hasMenuItem']

  msg << "\n\n"
  msg << pg['name']

  items = menu['hasMenuItem'].map do |item|
    desc = item['description'].gsub(STG_DESC_EXP) do |match|
      " (#{match.gsub(/\(|\)/, '').strip.tr(' ', '/')})" unless match.empty?
    end

    msg << "\n- #{item['name'].titleize} #{desc.strip}"
  end
end

File.open(STG_CONTROL_FILE, 'w+') do |file|
  file << date
end

HTTPI.post(
  HTTPI::Request.new(
    url: STG_CHANNEL_URL,
    body: JSON.dump(
      channel: '#seems-less',
      username: 'SMILE TO GO',
      text: msg,
      icon_emoji: ':smiletogo:'
    )
  )
)