IOS NOT BL

import UserNotifications

class NotificationService: UNNotificationServiceExtension {

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

  override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
    self.contentHandler = contentHandler
    bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)

    guard
      let content = (request.content.mutableCopy() as? UNMutableNotificationContent),
      let apnsData = content.userInfo["data"] as? [String: Any],
      let attachmentURL = apnsData["imageurl"] as? String,
      let imageData = NSData(contentsOf: NSURL(string: attachmentURL)! as URL),
      let attachment = UNNotificationAttachment.create(imageFileIdentifier: "image.png", data: imageData, options: nil)
    else {
      contentHandler(request.content)
      return
    }

    if #available(iOS 11.0, *) {
      let contentAddedCategory = UNNotificationCategory(identifier: "rich-push",
                                                        actions: [],
                                                        intentIdentifiers: [],
                                                        hiddenPreviewsBodyPlaceholder: "",
                                                        options: .customDismissAction)
      UNUserNotificationCenter.current().setNotificationCategories([contentAddedCategory])
    }
    content.attachments = [attachment]
    contentHandler(content.copy() as! UNNotificationContent)
  }

  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 bestAttemptContent = bestAttemptContent {
      contentHandler?(bestAttemptContent)
    }
  }
}

// MARK: - UNNotificationAttachment + FileManager
extension UNNotificationAttachment {

  static func create(imageFileIdentifier: String, data: NSData, options: [NSObject : AnyObject]?) -> UNNotificationAttachment? {
    let fileManager: FileManager = .default
    let tmpSubFolderName = ProcessInfo.processInfo.globallyUniqueString
    let fileURLPath = NSURL(fileURLWithPath: NSTemporaryDirectory())
    let tmpSubFolderURL = fileURLPath.appendingPathComponent(tmpSubFolderName, isDirectory: true)

    do {
      try fileManager.createDirectory(at: tmpSubFolderURL!, withIntermediateDirectories: true, attributes: nil)
      let fileURL = tmpSubFolderURL?.appendingPathComponent(imageFileIdentifier)
      try data.write(to: fileURL!, options: [])
      let imageAttachment = try UNNotificationAttachment.init(identifier: imageFileIdentifier, url: fileURL!, options: options)
      return imageAttachment
    }
    catch {
      print("error \(error)")
    }
    return nil
  }
}