gistfile1.rb

module FlowdockNotification
  class SubmissionCompleted < Base
    def submission
      data[:submission]
    end

    def api_token
      "foobarbaz"
    end
    
    def source
      "DIE ANMELDUNG"
    end
    
    def from
      { name: "Robot", address: "[email protected]"}
    end

    def subject
      "Abgeschickt: #{submission.project.name} – #{submission.form.human_name}"
    end
    
    def link
      data[:admin_link]
    end
    
    def content
      completed     = submission.form.completed.count
      not_completed = submission.form.not_completed.count
      "<p>Dieses Formular hat bisher <strong>#{completed} abgeschickte</strong> und <strong>#{not_completed} nicht abgeschickte</strong> Anmeldungen.</p>"
    end
    
    def project
      submission.project.name
    end
  end 
end

# Im Controller:
FlowdockNotification.post :submission_completed, submission: @submission, admin_link: link_to(…)