Added activate notification listener

Author: NomanShoaib

android/src/main/java/com/optimizely/optimizely_flutter_sdk/OptimizelyFlutterClient.java

@@ -41,6 +41,7 @@
 import com.optimizely.ab.event.BatchEventProcessor;
 import com.optimizely.ab.event.EventProcessor;
 import com.optimizely.ab.event.LogEvent;
+import com.optimizely.ab.notification.ActivateNotification;
 import com.optimizely.ab.notification.DecisionNotification;
 import com.optimizely.ab.notification.NotificationCenter;
 import com.optimizely.ab.notification.TrackNotification;
@@ -570,59 +571,65 @@ protected void addNotificationListener(ArgumentsParser argumentsParser, @NonNull
             result.success(createResponse(false, ErrorMessage.INVALID_PARAMS));
             return;
         }
+        int notificationId = 0;
         switch (type) {
             case NotificationType.DECISION: {
-                int notificationId = optimizelyClient.getNotificationCenter().addNotificationHandler(DecisionNotification.class, decisionNotification -> {
+                notificationId = optimizelyClient.getNotificationCenter().addNotificationHandler(DecisionNotification.class, decisionNotification -> {
                     Map<String, Object> notificationMap = new HashMap<>();
                     notificationMap.put(DecisionListenerKeys.TYPE, decisionNotification.getType());
                     notificationMap.put(DecisionListenerKeys.USER_ID, decisionNotification.getUserId());
                     notificationMap.put(DecisionListenerKeys.ATTRIBUTES, decisionNotification.getAttributes());
                     notificationMap.put(DecisionListenerKeys.DECISION_INFO, decisionNotification.getDecisionInfo());
                     invokeNotification(id, NotificationType.DECISION, notificationMap);
                 });
-                notificationIdsTracker.put(id, notificationId);
-                result.success(createResponse(true, SuccessMessage.LISTENER_ADDED));
+                break;
+            }
+            case NotificationType.ACTIVATE: {
+                notificationId = optimizelyClient.getNotificationCenter().addNotificationHandler(ActivateNotification.class, activateNotification -> {
+                    Map<String, Object> notificationMap = new HashMap<>();
+                    notificationMap.put(ActivateListenerKeys.EXPERIMENT_KEY, activateNotification.getExperiment().getKey());
+                    notificationMap.put(ActivateListenerKeys.USER_ID, activateNotification.getUserId());
+                    notificationMap.put(ActivateListenerKeys.ATTRIBUTES, activateNotification.getAttributes());
+                    notificationMap.put(ActivateListenerKeys.VARIATION_KEY, activateNotification.getVariation().getKey());
+                    invokeNotification(id, NotificationType.ACTIVATE, notificationMap);
+                });
                 break;
             }
             case NotificationType.TRACK: {
-                int notificationId = optimizelyClient.getNotificationCenter().addNotificationHandler(TrackNotification.class, trackNotification -> {
+                notificationId = optimizelyClient.getNotificationCenter().addNotificationHandler(TrackNotification.class, trackNotification -> {
                     Map<String, Object> notificationMap = new HashMap<>();
                     notificationMap.put(TrackListenerKeys.EVENT_KEY, trackNotification.getEventKey());
                     notificationMap.put(TrackListenerKeys.USER_ID, trackNotification.getUserId());
                     notificationMap.put(TrackListenerKeys.ATTRIBUTES, trackNotification.getAttributes());
                     notificationMap.put(TrackListenerKeys.EVENT_TAGS, trackNotification.getEventTags());
                     invokeNotification(id, NotificationType.TRACK, notificationMap);
                 });
-                notificationIdsTracker.put(id, notificationId);
-                result.success(createResponse(true, SuccessMessage.LISTENER_ADDED));
                 break;
             }
             case NotificationType.LOG_EVENT: {
-                int notificationId = optimizelyClient.getNotificationCenter().addNotificationHandler(LogEvent.class, logEvent -> {
+                notificationId = optimizelyClient.getNotificationCenter().addNotificationHandler(LogEvent.class, logEvent -> {
                     ObjectMapper mapper = new ObjectMapper();
                     Map<String, Object> eventParams = mapper.readValue(logEvent.getBody(), Map.class);
                     Map<String, Object> listenerMap = new HashMap<>();
                     listenerMap.put(LogEventListenerKeys.URL, logEvent.getEndpointUrl());
                     listenerMap.put(LogEventListenerKeys.PARAMS, eventParams);
                     invokeNotification(id, NotificationType.LOG_EVENT, listenerMap);
                 });
-                notificationIdsTracker.put(id, notificationId);
-                result.success(createResponse(true, SuccessMessage.LISTENER_ADDED));
                 break;
             }
             case NotificationType.CONFIG_UPDATE: {
-                int notificationId = optimizelyClient.getNotificationCenter().addNotificationHandler(UpdateConfigNotification.class, configUpdate -> {
+                notificationId = optimizelyClient.getNotificationCenter().addNotificationHandler(UpdateConfigNotification.class, configUpdate -> {
                     Map<String, Object> listenerMap = new HashMap<>();
                     listenerMap.put("Config-update", Collections.emptyMap());
                     invokeNotification(id, NotificationType.CONFIG_UPDATE, listenerMap);
                 });
-                notificationIdsTracker.put(id, notificationId);
-                result.success(createResponse(true, SuccessMessage.LISTENER_ADDED));
                 break;
             }
             default:
                 result.success(createResponse(false, ErrorMessage.INVALID_PARAMS));
         }
+        notificationIdsTracker.put(id, notificationId);
+        result.success(createResponse(true, SuccessMessage.LISTENER_ADDED));
     }
 
     private void invokeNotification(int id, String notificationType, Map notificationMap) {

android/src/main/java/com/optimizely/optimizely_flutter_sdk/helper_classes/Constants.java

@@ -37,6 +37,7 @@ public static class APIs {
     }
 
     public static class NotificationType {
+        public static final String ACTIVATE="activate";
         public static final String TRACK="track";
         public static final String DECISION = "decision";
         public static final String LOG_EVENT = "logEvent";
@@ -96,6 +97,13 @@ public static class DecisionListenerKeys {
         public static final String DECISION_INFO = "decisionInfo";
     }
 
+    public static class ActivateListenerKeys {
+        public static final String EXPERIMENT_KEY = "experimentKey";
+        public static final String USER_ID = "userId";
+        public static final String ATTRIBUTES = "attributes";
+        public static final String VARIATION_KEY = "variationKey";
+    }
+
     public static class TrackListenerKeys {
         public static final String EVENT_KEY = "eventKey";
         public static final String USER_ID = "userId";