Pre-emptively launch a token refresh when we receive a remote push

Pre-emptively launch a token refresh when we receive a remote push. Hopefully,
this will increase the chance that we will get the refreshed token before the
30 secs are up, and that we will be able to finish the sync in that time as well.

src/ios/BEMAppDelegate.m

@@ -49,17 +49,19 @@ + (BOOL)didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 
 - (void)application:(UIApplication *)application
                     didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
-    NSLog(@"Finished registering for remote notifications with token %@", deviceToken);
+    [LocalNotificationManager addNotification:[NSString stringWithFormat:
+                                               @"Finished registering for remote notifications with token %@", deviceToken]];
+
     // Store the deviceToken in the current installation and save it to Parse.
     PFInstallation *currentInstallation = [PFInstallation currentInstallation];
     [currentInstallation setDeviceTokenFromData:deviceToken];
     [currentInstallation saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
         if (succeeded) {
             [LocalNotificationManager addNotification:[NSString stringWithFormat:
-                                                       @"Successfully registered remote push notifications with parse"]];
+                                                       @"Successfully registered remote push notifications for token %@ with parse", deviceToken]];
         } else {
             [LocalNotificationManager addNotification:[NSString stringWithFormat:
-                                                       @"Error %@ while registering for remote push notifications with parse", error.description] showUI:TRUE];
+                                                       @"Error %@ while registering remote push notifications for token %@ with parse", error.description, deviceToken] showUI:TRUE];
         }
     }];
 }
@@ -78,6 +80,23 @@ - (void)application:(UIApplication *)application
                                        showUI:TRUE];
     NSLog(@"About to check whether a trip has ended");
     NSDictionary* localUserInfo = @{@"handler": completionHandler};
+    [[AuthCompletionHandler sharedInstance] getValidAuth:^(GTMOAuth2Authentication *auth, NSError *error) {
+        /*
+         * Note that we do not condition any further tasks on this refresh. That is because, in general, we expect that
+         * the token refreshed at this time will be used to push the next set of values. This is just pre-emptive refreshing,
+         * to increase the chance that we will finish pushing our data within the 30 sec interval.
+         */
+        if (error == NULL) {
+            GTMOAuth2Authentication* currAuth = [AuthCompletionHandler sharedInstance].currAuth;
+            [LocalNotificationManager addNotification:[NSString stringWithFormat:
+                                                       @"Finished refreshing token in background, new expiry is %@", currAuth.expirationDate]
+                                               showUI:TRUE];
+        } else {
+            [LocalNotificationManager addNotification:[NSString stringWithFormat:
+                                                       @"Error %@ while refreshing token in background", error]
+                                               showUI:TRUE];
+        }
+    } forceRefresh:TRUE];
     [[NSNotificationCenter defaultCenter] postNotificationName:CFCTransitionNotificationName object:CFCTransitionRecievedSilentPush userInfo:localUserInfo];
 }