Push Notifications

Requirements

Configure handling Push Notifications in your application. See Apple Developer - Notifications.

Configuring Firebase

Google Firebase Cloud Messaging is necessary to handle Mobile Campaigns sent from Synerise.

  1. Follow the instructions in Firebase - Get Started on iOS.
  2. Integrate the Firebase with Synerise. See Integration section.

Setting up Firebase Cloud Messaging for Synerise SDK

Extend the Firebase Messaging Delegate so our SDK can receive the Firebase token that is required to deliver Push Notifications from Synerise: 

   func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
   	FirebaseApp.configure()
   	Messaging.messaging().delegate = self

   	if #available(iOS 10, *) {
   		UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound]) { (granted, error) in

   		}
   	} else {
   		let settings = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
   		application.registerUserNotificationSettings(settings)
   	}

   	application.registerForRemoteNotifications()
   }

   // MARK: - MessagingDelegate

   func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) {
   	Client.registerForPush(registrationToken: fcmToken, success: { (success) in
   		// success
   	}) { (error) in
   		// failure
   	}
   }

Make sure that the Firebase token is always up-to-date by implementing a suitable method from the SNRSyneriseDelegate (see the Synerise Delegate section): 

   // MARK: - SyneriseDelegate

   func snr_registerForPushNotificationsIsNeeded() -> Void {
   	guard let fcmToken = Messaging.messaging().fcmToken else {
   		return
   	}

   	Client.registerForPush(registrationToken: fcmToken, success: { (success) in
   		// success
   	}) { (error) in
   		// failure
   	}
   }

Configuring Notification Encryption

To enable encrypted Push Notifications, you must the change configuration of your business profile in the Synerise portal. See Google Firebase.

Notification encryption support requires two steps:

  1. Implementation in the App (configuration and optionally dealing with custom payload)
  2. Implementation in the Notification Service Extension (decrypting payload)
Note: iOS 10 or newer is required for this feature.

Application

Set your Keychain Group Identifier (See this section) and set notifications.encryption to true in SDK settings:

Synerise.settings.sdk.keychainGroupIdentifier = "YOUR_KEYCHAIN_GROUP_IDENTIFIER"
Synerise.settings.notifications.encryption = true

Next: Enable encryption in the Notification Service Extension.

Encrypted custom payloads

If you need custom integration of encrypted Push Notifications, there are two methods for dealing with them:

Synerise.isNotificationEncrypted(_:) - Checks if notification payload is encrypted by Synerise.

Synerise.decryptNotification(_:) - Decrypts notification payload.

Synerise Notification Service Extension

SNRSyneriseNotificationServiceExtension is an object that adds the notification functionality to the SDK. It works by implementing the UNNotificationServiceExtension that cooperates with the Application.

The Synerise Notification Service Extension facilitates some operations by automating them. This means a one-time implementation provides new functionalities, changes, and fixes, along with new versions of the SDK.

It implements the following operations:

  • Decrypting Push Notifications (but not Remote/Silent Notifications)
  • Tracking events from Simple Push
  • Improving the appearance of Simple Push notifications (Rich Media)

Configuration

  1. Add the Notification Service Extension to your iOS project (Apple Developer - UNNotificationServiceExtension).
  2. Configure App Group Identifier (see this section).
  3. Configure Keychain Group Identifier (see this section).
Note:
  • App Group Identifier configuration is for tracking purposes.
  • Keychain Group Identifier configuration is for decryption purposes.

Implementation

import UserNotifications
import SyneriseSDK

class NotificationService: UNNotificationServiceExtension {

  var contentHandler: ((UNNotificationContent) -> Void)?
  var bestAttemptContent: UNMutableNotificationContent?

  override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
    self.contentHandler = contentHandler
    self.bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)
    
    if let bestAttemptContent = self.bestAttemptContent {
        Synerise.settings.sdk.appGroupIdentifier = "YOUR_APP_GROUP_IDENTIFIER"
        Synerise.settings.sdk.keychainGroupIdentifier = "YOUR_KEYCHAIN_GROUP_IDENTIFIER"
        
        #if DEBUG
        NotificationServiceExtension.setDebugModeEnabled(true)
        #endif
        
        NotificationServiceExtension.setDecryptionFallbackNotificationTitleAndBody(title: "(Encrypted))", body: "(Encrypted)")
        NotificationServiceExtension.didReceiveNotificationExtensionRequest(request, withMutableNotificationContent: bestAttemptContent)
        
        contentHandler(bestAttemptContent)
    }
  }

  override func serviceExtensionTimeWillExpire() {
    // Called just before the extension will be terminated by the system.
    // Use this as an opportunity to deliver your "best attempt" at modified content, otherwise the original push payload will be used.
    
    if let contentHandler = self.contentHandler, let bestAttemptContent =  self.bestAttemptContent {
        contentHandler(bestAttemptContent)
    }
  }
}

See the examples Notification Service Extensions with implemented notification decryption:

Debug Mode

You can enable debug mode for Notification Service Extension testing purposes.

WARNING: No not use Debug Mode in a release version of your application.
override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
  self.contentHandler = contentHandler
  self.bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)

  //...
  SyneriseNotificationServiceExtension.setDebugModeEnabled(true)
  //...
}

Notification Encryption

In debug mode, decryption process is always successful.

Your best attempt content (UNNotificationContent object) is modified - the notification displays the title and body with the problem that occurred during decryption. It may help you debug and find problems with the configuration.

Supporting Rich Media in Push Notifications

To add this feature in your Simple Push Campaigns, you must:

  1. Configure the App Group that identifies the group used by applications the and extensions it belongs to.
    Documentation is available at Apple Developer - App Groups.
  2. Add the Notification Content Extension in your iOS project - separately for each type of our Rich Media extensions.
  3. Configure your application and the SDK.

Notification Content Extension implementation

Synerise SDK does most of the work needed and provides classes for the Notification Content Extensions. When you create an extension, you only need to make it inherited from a suitable Synerise SDK class.

See the examples Notification Content Extensions with correct configuration:

import UIKit
import UserNotifications
import UserNotificationsUI
import SyneriseSDK

class NotificationViewController: SingleMediaContentExtensionViewController, UNNotificationContentExtension {

    func didReceive(_ notification: UNNotification) {
        Synerise.settings.notifications.appGroupIdentifier = "YOUR_APP_GROUP_IDENTIFIER"
        setSyneriseNotification(notification)
    }

    func didReceive(_ response: UNNotificationResponse, completionHandler completion: @escaping (UNNotificationContentExtensionResponseOption) -> Void) {
        setSyneriseNotificationResponse(response, completionHandler: completion)
    }
}
Note: Remember about correct configuration in your extension’s \*.plist file. See Notification Content Extensions in the Sample Swift App.

Application implementation

When the extension is configured, pass your app group identifier to the SDK (Set up App Group Identifier) and add custom categories in your application.

You have to create notifications categories with the right identifiers. The identifiers must be taken from the Synerise SDK constants. This does not affect button names.

Synerise.settings.notifications.appGroupIdentifier = "YOUR_APP_GROUP_IDENTIFIER"

let singleMediaCategory = UNNotificationCategory(identifier: SNRSingleMediaContentExtensionViewControllerCategoryIdentifier, actions: [], intentIdentifiers: [], options: [])

let carouselPrevious = UNNotificationAction(identifier: SNRCarouselContentExtensionViewControllerPreviousItemIdentifier, title: "Previous", options: [])
let carouselAction = UNNotificationAction(identifier: SNRCarouselContentExtensionViewControllerChooseItemIdentifier, title: "Go!", options: UNNotificationActionOptions.foreground)

let carouselNext = UNNotificationAction(identifier: SNRCarouselContentExtensionViewControllerNextItemIdentifier, title: "Next", options: [])

let carouselCategory = UNNotificationCategory(identifier: SNRCarouselContentExtensionViewControllerCategoryIdentifier, actions: [carouselPrevious, carouselAction, carouselNext], intentIdentifiers: [], options: [])

UNUserNotificationCenter.current().setNotificationCategories([singleMediaCategory, carouselCategory])

Handling incoming Synerise Push Notifications

Note: You may disable handling Push Notifications in the SDK at any time. See Enable/disable notifications.

Documentation on how to prepare Push Notifications on app.synerise.com is available in our Mobile Knowledge Base.

In order to handle Synerise Push Notifications, you must pass the incoming push payload to the Synerise SDK.

The following code shows how to handle Push Notifications and Silent Push Notifications in the AppDelegate:

// iOS 9
// Push Notifications
// Silent Push Notifications

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any]) {
	let isSyneriseNotification: Bool = Synerise.isSyneriseNotification(userInfo)
	
	if isSyneriseNotification {
		Synerise.handleNotification(userInfo)
	}
}

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
	let isSyneriseNotification: Bool = Synerise.isSyneriseNotification(userInfo)
	
	if isSyneriseNotification {
		Synerise.handleNotification(userInfo)
		completionHandler(.noData)
	}
}

func application(_ application: UIApplication, handleActionWithIdentifier identifier: String?, forRemoteNotification userInfo: [AnyHashable : Any], completionHandler: @escaping () -> Void) {
	let isSyneriseNotification: Bool = Synerise.isSyneriseNotification(userInfo)
	
	if isSyneriseNotification {
		Synerise.handleNotification(userInfo)
		completionHandler()
	}
}

// iOS 10 and above
// Push Notifications

// MARK: - UNUserNotificationCenterDelegate

@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
	let userInfo = response.notification.request.content.userInfo
	
	let isSyneriseNotification: Bool = Synerise.isSyneriseNotification(userInfo)
	
	if isSyneriseNotification {
		Synerise.handleNotification(userInfo)
		completionHandler()
	}
}

@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
	let userInfo = notification.request.content.userInfo

	let isSyneriseNotification: Bool = Synerise.isSyneriseNotification(userInfo)
	
	if isSyneriseNotification {
		Synerise.handleNotification(userInfo)
		completionHandler(UNNotificationPresentationOptions.init(rawValue: 0))
	}
}
Important: All of these methods must be implemented to ensure proper handling of Push Notifications.
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