Class: SprintClient

Inherits:
Object
  • Object
show all
Defined in:
lib/sprint_client.rb

Overview

Interfaces with SPrint service: github.com/sanger/sprint

Class Method Summary collapse

Class Method Details

.send_print_request(printer_name, label_template_name, merge_fields_list) ⇒ Object

printer_name - a string showing which printer to send the request to label_template_name - a string to identify which label template to be used in the print request merge_fields_list - a list of hashes, each containing the field values for a particular label

e.g [{ barcode: "DN111111", date: "1-APR-2020" }, { barcode: "DN222222", date: "2-APR-2020" }] would print two labels



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# File 'lib/sprint_client.rb', line 12

def self.send_print_request(printer_name, label_template_name, merge_fields_list)
  # define GraphQL print mutation
  query = "mutation Print($printRequest: PrintRequest!, $printer: String!) {
    print(printRequest: $printRequest, printer: $printer) {
      jobId
    }
  }"

  # locate the required label template    
  path = File.join('config', 'sprint', label_template_name)
  template = ERB.new File.read(path)

  # parse the template for each label
  layouts = merge_fields_list.map do |merge_fields|
    YAML.load template.result binding
  end

  # build the body of the print request
  body = {
    "query": query,
    "variables": {
      "printer": printer_name,
      "printRequest": {
        "layouts": layouts
      }
    }
  }

  # send POST request to SPrint url
  reponse = Net::HTTP.post URI(configatron.sprint_url),
                            body.to_json,
                            'Content-Type' => 'application/json'

  # return response of POST request
  puts response
  reponse
end