Pull out AvailablePrinters

lib/quickets.rb

@@ -3,6 +3,7 @@
 
 # Web framework
 require "roda"
+require "quickets/available_printers"
 
 # Interface to java lib
 require "java"
@@ -28,8 +29,7 @@ class App < Roda
         fail ArgumentError, 'Invalid API key' if config.api_key != r['api_key']
 
         r.on 'printers' do
-          installed_printers = PrintServiceLocator.new.all.map(&:name)
-          config.printers & installed_printers # retains ordering of config
+          AvailablePrinters.all(r['api_key'])
         end
 
         r.post "print-tickets" do

lib/quickets/available_printers.rb

@@ -0,0 +1,17 @@
+# Interface to java lib
+require "java"
+require "jars/ticket_printer-1.2.0-jar-with-dependencies.jar"
+
+java_import com.quicktravel.ticket_printer.PrintServiceLocator
+
+module Quickets
+  class AvailablePrinters
+    def self.all(api_key)
+      installed_printers = PrintServiceLocator.new.all.map(&:name)
+
+      # Return only printers configured AND installed
+      # ...and retain ordering as defined in config
+      Quickets.config.printers_for(api_key) & installed_printers
+    end
+  end
+end