fix(track): Batch decision payloads into the same array in the snapshot.

Author: Mike Ng

packages/optimizely-sdk/lib/core/event_builder/index.js

@@ -115,47 +115,45 @@ function getImpressionEventParams(configObj, experimentId, variationId) {
  * @param  {Object} logger                    Logger object
  * @return {Object}                           Conversion event params
  */
-function getConversionEventParams(configObj, eventKey, eventTags, experimentsToVariationMap, logger) {
-
-  var conversionEventParams = [];
+function getVisitorSnapshot(configObj, eventKey, eventTags, experimentsToVariationMap, logger) {  
+  var snapshot = {
+    decisions: [],
+    events: []
+  };
 
   fns.forOwn(experimentsToVariationMap, function(variationId, experimentId) {
-
     var decision = {
-      decisions: [{
-        campaign_id: projectConfig.getLayerId(configObj, experimentId),
-        experiment_id: experimentId,
-        variation_id: variationId,
-      }],
-      events: [],
+      campaign_id: projectConfig.getLayerId(configObj, experimentId),
+      experiment_id: experimentId,
+      variation_id: variationId,
     };
 
-    var eventDict = {
-      entity_id: projectConfig.getEventId(configObj, eventKey),
-      timestamp: fns.currentTimestamp(),
-      uuid: fns.uuid(),
-      key: eventKey,
-    };
+    snapshot.decisions.push(decision);
+  });
 
-    if (eventTags) {
-      var revenue = eventTagUtils.getRevenueValue(eventTags, logger);
-      if (revenue) {
-        eventDict[enums.RESERVED_EVENT_KEYWORDS.REVENUE] = revenue;
-      }
+  var eventDict = {
+    entity_id: projectConfig.getEventId(configObj, eventKey),
+    timestamp: fns.currentTimestamp(),
+    uuid: fns.uuid(),
+    key: eventKey,
+  };
 
-      var eventValue = eventTagUtils.getEventValue(eventTags, logger);
-      if (eventValue) {
-        eventDict[enums.RESERVED_EVENT_KEYWORDS.VALUE] = eventValue;
-      }
+  if (eventTags) {
+    var revenue = eventTagUtils.getRevenueValue(eventTags, logger);
+    if (revenue) {
+      eventDict[enums.RESERVED_EVENT_KEYWORDS.REVENUE] = revenue;
+    }
 
-      eventDict['tags'] = eventTags;
+    var eventValue = eventTagUtils.getEventValue(eventTags, logger);
+    if (eventValue) {
+      eventDict[enums.RESERVED_EVENT_KEYWORDS.VALUE] = eventValue;
     }
-    decision.events = [eventDict];
 
-    conversionEventParams.push(decision);
-  });
+    eventDict['tags'] = eventTags;
+  }
+  snapshot.events.push(eventDict);
 
-  return conversionEventParams;
+  return snapshot;
 }
 
 module.exports = {
@@ -210,13 +208,13 @@ module.exports = {
     var commonParams = getCommonEventParams(options);
     conversionEvent.url = ENDPOINT;
 
-    var conversionEventParams = getConversionEventParams(options.configObj,
-                                                         options.eventKey,
-                                                         options.eventTags,
-                                                         options.experimentsToVariationMap,
-                                                         options.logger);
+    var snapshot = getVisitorSnapshot(options.configObj,
+                                            options.eventKey,
+                                            options.eventTags,
+                                            options.experimentsToVariationMap,
+                                            options.logger);
 
-    commonParams.visitors[0].snapshots = conversionEventParams;
+    commonParams.visitors[0].snapshots = [snapshot];
     conversionEvent.params = commonParams;
 
     return conversionEvent;

packages/optimizely-sdk/lib/core/event_builder/index.tests.js

@@ -782,6 +782,59 @@ describe('lib/core/event_builder', function() {
         assert.deepEqual(actualParams, expectedParams);
       });
 
+      it('should create the correct snapshot for multiple experiments attached to the event', function() {
+        var expectedParams = {
+          url: 'https://logx.optimizely.com/v1/events',
+          httpVerb: 'POST',
+          params: {
+            'account_id': '12001',
+            'project_id': '111001',
+            'visitors': [{
+              'visitor_id': 'testUser',
+              'attributes': [],
+              'snapshots': [{
+                'decisions': [{
+                  'variation_id': '111128',
+                  'experiment_id': '111127',
+                  'campaign_id': '4'
+                }, {
+                  'variation_id': '122228',
+                  'experiment_id': '122227',
+                  'campaign_id': '5'
+                }],
+                'events': [{
+                  'timestamp': Math.round(new Date().getTime()),
+                  'entity_id': '111100',
+                  'uuid': 'a68cf1ad-0393-4e18-af87-efe8f01a7c9c',
+                  'key': 'testEventWithMultipleExperiments'
+                }]
+              }]
+            }],
+            'revision': '42',
+            'client_name': 'node-sdk',
+            'client_version': packageJSON.version,
+            'anonymize_ip': false,
+          }
+        };
+
+        var eventOptions = {
+          clientEngine: 'node-sdk',
+          clientVersion: packageJSON.version,
+          configObj: configObj,
+          eventKey: 'testEventWithMultipleExperiments',
+          logger: mockLogger,
+          userId: 'testUser',
+          experimentsToVariationMap: {
+            '111127': '111128',
+            '122227': '122228'
+          },
+        };
+
+        var actualParams = eventBuilder.getConversionEvent(eventOptions);
+
+        assert.deepEqual(actualParams, expectedParams);
+      });
+
       describe('and event tags are passed it', function() {
         it('should create proper params for getConversionEvent with event tags', function() {
           var expectedParams = {

packages/optimizely-sdk/lib/optimizely/index.tests.js

@@ -1272,16 +1272,7 @@ describe('lib/optimizely', function() {
                   'campaign_id': '4',
                   'experiment_id': '111127',
                   'variation_id': '111129'
-                }],
-                'events': [{
-                  'entity_id': '111100',
-                  'timestamp': Math.round(new Date().getTime()),
-                  'uuid': 'a68cf1ad-0393-4e18-af87-efe8f01a7c9c',
-                  'key': 'testEventWithMultipleExperiments',
-                }]
-              },
-              {
-                'decisions': [{
+                }, {
                   'campaign_id': '5',
                   'experiment_id': '122227',
                   'variation_id': '122229'