mailgun.rb

class MyMailgun

  def initialize
    @api_key = 'key-********************************'
    @mg_client = Mailgun::Client.new @api_key
    @domain = 'sandbox********************.mailgun.org'
    @mg_events = Mailgun::Events.new(@mg_client, @domain)
  end

  def get_activation_link(email)
    last_email(email)['body-plain'].match(/(https?:.+confirm-email\/[a-f0-9]{32})/).to_s
  end

  def get_pwd_change_link(email)
    last_email(email)['body-plain'].match(/(https?:.+reset-password\/.+#{email}.+[a-f0-9]{32})/).to_s
  end

  def inbox(email)
    results = []
    while results.empty?
      results = @mg_events.get({event:'stored'}).to_h['items']
      results.select! { |result| result['message']['headers']['to'] == email }
    end
    results
  end

  def emails_count(email)
    inbox(email).count
  end

  def last_email(email)
    _inbox = inbox(email)
    email_id = _inbox.first['storage']['key']
    @mg_client.get("domains/#{@domain}/messages/#{email_id}").to_h
  end

  def last_email_subject(email)
    inbox(email).first['message']['headers']['subject']
  end

  def generate_email
    UUID.generate(:compact).to_s + '@sandbox******************.mailgun.org'
  end

end