fix(ios): deliver payload to frontend handler when app in background

Author: erisu

docs/API.md

@@ -389,6 +389,7 @@ The event `notification` will be triggered each time a push notification is rece
 | `data.additionalData.foreground` | `boolean` | Whether the notification was received while the app was in the foreground                                                                                                                                                           |
 | `data.additionalData.coldstart`  | `boolean` | Will be `true` if the application is started by clicking on the push notification, `false` if the app is already started.                                                                                                           |
 | `data.additionalData.dismissed`  | `boolean` | Is set to `true` if the notification was dismissed by the user                                                                                                                                                                      |
+| `data.additionalData.applicationState`  | `number` | (iOS Only Flag) Contains the application state of the received notification. 0: `UIApplicationStateActive`, 1: `UIApplicationStateInactive`, 2: `UIApplicationStateBackground` |
 
 ### Example
 

src/ios/PushPlugin.m

@@ -192,9 +192,9 @@ - (void)init:(CDVInvokedUrlCommand *)command {
             [center setNotificationCategories:[settings categories]];
 
             // If there is a pending startup notification, we will delay to allow JS event handlers to setup
-            if (self.notificationMessage && !self.isInitialized) {
-                dispatch_async(dispatch_get_main_queue(), ^{
-                    [self performSelector:@selector(notificationReceived) withObject:nil afterDelay: 0.5];
+            if (self.notificationMessage) {
+                dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
+                    [self notificationReceived:@YES];
                 });
             }
 
@@ -489,6 +489,10 @@ - (void)didReceiveNotificationResponse:(NSNotification *)notification {
 }
 
 - (void)notificationReceived {
+    [self notificationReceived:@NO];
+}
+
+- (void)notificationReceived:(NSNumber *)forceClear {
     NSLog(@"[PushPlugin] Notification received");
 
     if (self.notificationMessage && self.callbackId != nil)
@@ -502,9 +506,7 @@ - (void)notificationReceived {
         if ([[mutableNotificationMessage objectForKey:@"actionCallback"] isEqualToString:UNNotificationDefaultActionIdentifier]) {
             [mutableNotificationMessage removeObjectForKey:@"actionCallback"];
         }
-        // @todo do not sent applicationState data to front for now. Figure out if we can add
-        // similar data to the other platforms.
-        [mutableNotificationMessage removeObjectForKey:@"applicationState"];
+
         self.notificationMessage = [mutableNotificationMessage copy];
 
         for (id key in self.notificationMessage) {
@@ -567,9 +569,26 @@ - (void)notificationReceived {
         [pluginResult setKeepCallbackAsBool:YES];
         [self.commandDelegate sendPluginResult:pluginResult callbackId:self.callbackId];
 
+        // When application state is inactive, do not clear notificationMessage.
+        // The init method will trigger when returning to foreground and trigger notification process.
+        NSNumber *applicationState = self.notificationMessage[@"applicationState"];
+        if (applicationState && [applicationState isKindOfClass:[NSNumber class]]) {
+            if ([applicationState integerValue] != UIApplicationStateInactive) {
+                self.notificationMessage = nil;
+            }
+        } else {
+            // Handle unexpected cases where applicationState is missing or invalid
+            self.notificationMessage = nil;
+        }
+
+        // Force clear comes from init. This ensure that it will be processed once.
+        BOOL shouldForceClear = [forceClear boolValue];
+        if (shouldForceClear) {
+            self.notificationMessage = nil;
+        }
+
         self.coldstart = NO;
         self.isForeground = NO;
-        self.notificationMessage = nil;
     }
 }