this.register = function()

in digital-shadow/demo-car/js/aws-iot/aws-iot.js [16355:16422]
65 lines of code
17 McCabe index (conditional complexity)

   this.register = function(thingName, options, callback) {
      if (!thingShadows.hasOwnProperty(thingName)) {
         var ignoreDeltas = false;
         var topicSpecs = [];
         thingShadows[thingName] = {
            persistentSubscribe: true,
            debug: false,
            discardStale: true,
            enableVersioning: true,
            qos: 0,
            pending: true
         };

         if (!isUndefined(options)) {
            if (!isUndefined(options.ignoreDeltas)) {
               ignoreDeltas = options.ignoreDeltas;
            }
            if (!isUndefined(options.persistentSubscribe)) {
               thingShadows[thingName].persistentSubscribe = options.persistentSubscribe;
            }
            if (!isUndefined(options.debug)) {
               thingShadows[thingName].debug = options.debug;
            }
            if (!isUndefined(options.discardStale)) {
               thingShadows[thingName].discardStale = options.discardStale;
            }
            if (!isUndefined(options.enableVersioning)) {
               thingShadows[thingName].enableVersioning = options.enableVersioning;
            }
            if (!isUndefined(options.qos)) {
               thingShadows[thingName].qos = options.qos;
            }
         }
         if (ignoreDeltas === false) {
            topicSpecs.push({
               operations: ['update'],
               statii: ['delta']
            });
         }
         if (thingShadows[thingName].persistentSubscribe === true) {
            topicSpecs.push({
               operations: ['update', 'get', 'delete'],
               statii: ['accepted', 'rejected']
            });
         }

         if (topicSpecs.length > 0) {
            this._handleSubscriptions(thingName, topicSpecs, 'subscribe', function(err, failedTopics) {
               if (isUndefined(err) && isUndefined(failedTopics)) {
                  thingShadows[thingName].pending = false;
               }
               if (!isUndefined(callback)) {
                  callback(err, failedTopics);
               }
            });
         } else {
            thingShadows[thingName].pending = false;
            if (!isUndefined(callback)) {
               callback();
            }
         }

      } else {
         if (deviceOptions.debug === true) {
            console.error('thing already registered: ', thingName);
         }
      }
   };