[Android] Add hooks to intent handling and bundle parsing

Allows easier customization of intent handling and bundle parsing behaviour on Android. This can be used to send notifications sent by 3rd party messaging management platforms that have custom message formats the same onNotification() JS codepath.

Author: cayleyh

android/src/main/java/com/dieam/reactnativepushnotification/modules/RNPushNotification.java

@@ -42,6 +42,15 @@ public class RNPushNotification extends ReactContextBaseJavaModule implements Ac
     public static final String LOG_TAG = "RNPushNotification";// all logging should use this tag
     public static final String KEY_TEXT_REPLY = "key_text_reply";
 
+    public interface RNIntentHandler {
+        void onNewIntent(Intent intent);
+  
+        @Nullable
+        Bundle getBundleFromIntent(Intent intent);
+    }
+  
+    public static ArrayList<RNIntentHandler> IntentHandlers = new ArrayList();
+
     private RNPushNotificationHelper mRNPushNotificationHelper;
     private final SecureRandom mRandomNumberGenerator = new SecureRandom();
     private RNPushNotificationJsDelivery mJsDelivery;
@@ -81,6 +90,12 @@ private Bundle getBundleFromIntent(Intent intent) {
             bundle.putBundle("data", intent.getExtras());
         }
 
+        if (bundle == null) {
+            for (RNIntentHandler handler : IntentHandlers) {
+                bundle = handler.getBundleFromIntent(intent);
+            }
+        }
+
         if(null != bundle && !bundle.getBoolean("foreground", false) && !bundle.containsKey("userInteraction")) {
           bundle.putBoolean("userInteraction", true);
         }
@@ -90,6 +105,10 @@ private Bundle getBundleFromIntent(Intent intent) {
 
     @Override
     public void onNewIntent(Intent intent) {
+        for (RNIntentHandler handler : IntentHandlers) {
+            handler.onNewIntent(intent);
+        }
+        
         Bundle bundle = this.getBundleFromIntent(intent);
         if (bundle != null) {
             mJsDelivery.notifyNotification(bundle);