var Service = (function() {

      function doStuff(command, package) {
        var response = ""

        switch(command) {
          case "A":
            response = a(package);
            break;
          case "B":
            response = b(package);
            break;
          case "C":
            response = c(package);
            break;
          default:
            // should never get here
            response = "NOPE!";
        }

        return response;
      }

      function a(package) {
            // do stuff
      }

      function b(package) {
            // do stuff
      }

      function c(package) {
        // do stuff;
      }

      return {
        doStuff: doStuff,
        a: a,
        b: b,
        c: c
      }
    });

    module.exports = Service;