wikispam

#!/usr/bin/env ruby

require 'httparty'
require 'sendgrid-ruby'

if (ARGV.length > 2 || ARGV.length == 0)
  abort 'Usage: wikispam SEND_TO_EMAIL_ADDRESS [NUMBER_OF_EMAILS]'
end

send_to = ARGV[0]
n = (ARGV.length == 1) ? 1 : ARGV[1].to_i

file_lines = File.readlines(File.expand_path('~/.wikispam'))
user = file_lines[0].chomp
key = file_lines[1].chomp
from_email = file_lines[2].chomp
author = file_lines[3] ? file_lines[3].chomp : nil

client = SendGrid::Client.new(api_user: user, api_key: key)

url = 'http://en.wikipedia.org/w/api.php?action=query&generator=random&'\
      'grnnamespace=0&prop=extracts&format=json'

(1..n).each do |i|
  parsed_response = HTTParty.get(url).parsed_response
  raise "#{parsed_response['error']['info']}" if parsed_response['error']

  title = parsed_response['query']['pages'].values[0]['title']
  article = parsed_response['query']['pages'].values[0]['extract']

  mail = SendGrid::Mail.new do |m|
    m.to = send_to
    m.from = from_email
    m.from_name = author
    m.subject = title
    m.html = article
  end

  mail_response = client.send(mail)
  puts "Email #{i}: #{mail_response.body['message']}  (#{title})"
end