easypost_printnode_slack.rb

add_file_to_printnode_queue.rb

# app/services/add_file_to_printnode_queue.rb
require 'printnode'

class AddFileToPrintnodeQueue

  def self.call(file_url, title, printer_name, file_type='pdf_uri')
    # Connect to the API and setup a Client object.
    auth   = PrintNode::Auth.new(ENV['printnode_api_key'])
    client = PrintNode::Client.new(auth)

    begin
      if client.printers.any?
        printer = client.printers.find { |printer| printer.name == printer_name }
        
        if printer.nil?
          raise "No printer found with name '#{printer_name}'. Available printer names are: #{client.printers.map(&:name).join(', ')}."
        end
      else
        raise 'No printers available.'
      end
    rescue
      # PrintNode will return a json response if the api key is invalid.
      raise 'Invalid credentials or timed out.'
    end

    # Setup a new print job object.
    setup = PrintNode::PrintJob.new(
              printer.id,        # Printer id
              title,             # A title to give the PrintJob (appears in print queue)
              file_type,         # Type of file, pdf_uri or raw_uri for .zpl's
              file_url,          # URL to file
              ENV['app_name']    # Source
            )

    # Send print job to queue.
    print_job = client.create_printjob(setup, { expireAfter: 120000 })
    
    # View status of print job.
    client.printjobs(print_job)
  end

end

invoices_controller.rb

# app/controllers/admin/printnode/invoices_controller.rb
class Admin::Printnode::InvoicesController < Admin::AdminController

  def print
    @invoice = CreatePrintnodeService.call(
      invoice_admin_order_fulfillment_url(@order, @fulfillment, format: :pdf),
      "FUL##{@fulfillment.guid.split('-')[0]}".upcase,
      ENV['invoice_printer']
    )
  rescue => e
    flash.now[:error] = e
  end

end

labels_controller.rb

# app/controllers/admin/printnode/labels_controller.rb
class Admin::Printnode::LabelsController < Admin::AdminController

  def print
    @label = CreatePrintnodeService.call(
      @fulfillment.label_zpl_url,
      @fulfillment.shipment_id,
      ENV['label_printer'],
      'raw_uri'
    )
  rescue => e
    flash.now[:error] = e
  end

end