Creates a Mailchimp campaign based on a URL. Useful if you tend to deliver your most recent blog post or whatever but aren't satisfied with the RSS campaign feature.

create_campaign.rb

require 'rest-client'
require 'json'
require 'yaml'
require 'opengraph_parser'
require 'open-uri'

# Generate a new Mailchimp campaign from a page one your website. I used to use 
# this with a purpose-built template in my static site generator that 
# automatiacally set up my most recent post as an email, just the way I liked 
# it. You'll probably need to make some changes to suit your needs but you're 
# already off to a great start! Good luck!

# A URL on the web where your content already exists
ARTICLE_URL = 'https://example.com/email/'.freeze
MAILCHIMP_API_KEY = 'CHANGEME'.freeze
FROM_NAME = 'Your Name'.freeze
REPLY_TO = 'you@example.com'.freeze

# Oh yeah, this script also spits out text you can share on Twitter or whatever. 
# For that it uses these two CSS selectors to fetch a permalink and a little 
# description snippet from your webpage.
PERMALINK_SELECTOR = '.permalink'
SUMMARY_SELECTOR = '.preview-text'

MAILCHIMP_DATA_CENTER = MAILCHIMP_API_KEY.split('-').last.freeze
BASE_API_URL = "https://#{MAILCHIMP_DATA_CENTER}.api.mailchimp.com/3.0".freeze

# This script assumes you're using OpenGraph tags.
article = OpenGraph.new(ARTICLE_URL)
html = open(ARTICLE_URL).read.force_encoding('UTF-8').encode('UTF-8')

payload = {
  type: 'regular',
  recipients: { list_id: 'acad6b38c1' },
  settings: {
    subject_line: article.title,
    title: article.title,
    from_name: FROM_NAME,
    reply_to: REPLY_TO,
    to_name: '*|FNAME|*',
    inline_css: true
  }
}

response =
  RestClient.post \
    "#{BASE_API_URL}/campaigns",
    payload.to_json,
    'Authorization' => "apikey #{MAILCHIMP_API_KEY}"
    
body = JSON.parse(response, symbolize_names: true)

campaign_id = body[:id]

payload = { html: html }

response =
  RestClient.put \
    "#{BASE_API_URL}/campaigns/#{campaign_id}/content",
    payload.to_json,
    'Authorization' => "apikey #{MAILCHIMP_API_KEY}"

body = JSON.parse(response, symbolize_names: true)

puts body.to_yaml

puts '---'

document = Nokogiri::HTML(html)

permalink = document.css(PERMALINK_SELECTOR).first[:href]

puts "#{article.title} • #{document.css(SUMMARY_SELECTOR).inner_html.strip} #{permalink}"