Slack bot to get featured geography fact

slack_geo.rb

#!/usr/bin/env ruby
require 'nokogiri'
require 'open-uri'
require 'json'
require 'net/http'

def geo_fact
  page = Nokogiri::HTML(open("https://en.wikipedia.org/wiki/Portal:Geography"))
  column = page.css('.portal-column-left')
  if column.css('#Featured_article').text == "Featured article"
    paragraph = column.css('div')[3].text.gsub('\n', '').strip
    sentence  = paragraph.match(/^[^\.\?!]*/)
    "#{sentence}."
  end
end

def post(fact:, url:)
  request = Net::HTTP::Post.new(url)
  request.body = {
    'username' => 'GeographyBot',
    'icon_emoji' => ':world_map:',
    'text' => fact
  }.to_json

  uri = URI.parse("https://hooks.slack.com")
  http = Net::HTTP.new(uri.host, uri.port)
  http.use_ssl = true
  response = http.request(request)
  
  puts response.code
  puts response.body
end

url = ENV.fetch('SLACK_URL')
post(fact: geo_fact, url: url)