import UserNotifications import KeychainSwift import Env import CryptoKit import Models import UIKit @MainActor 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) if let bestAttemptContent { let privateKey = PushNotificationsService.shared.notificationsPrivateKeyAsKey let auth = PushNotificationsService.shared.notificationsAuthKeyAsKey guard let encodedPayload = bestAttemptContent.userInfo["m"] as? String, let payload = Data(base64Encoded: encodedPayload.URLSafeBase64ToBase64()) else { contentHandler(bestAttemptContent) return } guard let encodedPublicKey = bestAttemptContent.userInfo["k"] as? String, let publicKeyData = Data(base64Encoded: encodedPublicKey.URLSafeBase64ToBase64()), let publicKey = try? P256.KeyAgreement.PublicKey(x963Representation: publicKeyData) else { contentHandler(bestAttemptContent) return } guard let encodedSalt = bestAttemptContent.userInfo["s"] as? String, let salt = Data(base64Encoded: encodedSalt.URLSafeBase64ToBase64()) else { contentHandler(bestAttemptContent) return } guard let plaintextData = NotificationService.decrypt(payload: payload, salt: salt, auth: auth, privateKey: privateKey, publicKey: publicKey), let notification = try? JSONDecoder().decode(MastodonPushNotification.self, from: plaintextData) else { contentHandler(bestAttemptContent) return } bestAttemptContent.title = notification.title bestAttemptContent.subtitle = "" bestAttemptContent.body = notification.body.escape() bestAttemptContent.userInfo["plaintext"] = plaintextData bestAttemptContent.sound = UNNotificationSound.init(named: UNNotificationSoundName(rawValue: "glass.wav")) let preferences = UserPreferences() preferences.pushNotificationsCount += 1 bestAttemptContent.badge = .init(integerLiteral: preferences.pushNotificationsCount) if let urlString = notification.icon, let url = URL(string: urlString) { let temporaryDirectoryURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("notification-attachments") try? FileManager.default.createDirectory(at: temporaryDirectoryURL, withIntermediateDirectories: true, attributes: nil) let filename = url.lastPathComponent let fileURL = temporaryDirectoryURL.appendingPathComponent(filename) Task { if let (data, _) = try? await URLSession.shared.data(for: .init(url: url)) { if let image = UIImage(data: data) { try? image.pngData()?.write(to: fileURL) if let attachment = try? UNNotificationAttachment(identifier: filename, url: fileURL, options: nil) { bestAttemptContent.attachments = [attachment] } } contentHandler(bestAttemptContent) } else { contentHandler(bestAttemptContent) } } } else { contentHandler(bestAttemptContent) } } } }