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mastodon-app-ufficiale-ipho.../NotificationService/NotificationService.swift

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Swift
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This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

//
// NotificationService.swift
// NotificationService
//
// Created by MainasuK Cirno on 2021-4-23.
//
import UserNotifications
import CommonOSLog
import CryptoKit
import AlamofireImage
import AppShared
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 = bestAttemptContent {
// Modify the notification content here...
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
let privateKey = AppSecret.default.notificationPrivateKey
let auth = AppSecret.default.notificationAuth
guard let encodedPayload = bestAttemptContent.userInfo["p"] as? String else {
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: invalid payload", ((#file as NSString).lastPathComponent), #line, #function)
contentHandler(bestAttemptContent)
return
}
let payload = encodedPayload.decode85()
guard let encodedPublicKey = bestAttemptContent.userInfo["k"] as? String,
let publicKey = NotificationService.publicKey(encodedPublicKey: encodedPublicKey) else {
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: invalid public key", ((#file as NSString).lastPathComponent), #line, #function)
contentHandler(bestAttemptContent)
return
}
guard let encodedSalt = bestAttemptContent.userInfo["s"] as? String else {
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: invalid salt", ((#file as NSString).lastPathComponent), #line, #function)
contentHandler(bestAttemptContent)
return
}
let salt = encodedSalt.decode85()
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.sound = UNNotificationSound.init(named: UNNotificationSoundName(rawValue: "BoopSound.caf"))
bestAttemptContent.userInfo["plaintext"] = plaintextData
let accessToken = notification.accessToken
UserDefaults.shared.increaseNotificationCount(accessToken: accessToken)
UserDefaults.shared.notificationBadgeCount += 1
bestAttemptContent.badge = NSNumber(integerLiteral: UserDefaults.shared.notificationBadgeCount)
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)
ImageDownloader.default.download(URLRequest(url: url), completion: { [weak self] response in
guard let _ = self else { return }
switch response.result {
case .failure(let error):
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: download image %s fail: %s", ((#file as NSString).lastPathComponent), #line, #function, url.debugDescription, error.localizedDescription)
case .success(let image):
os_log(.info, log: .debug, "%{public}s[%{public}ld], %{public}s: download image %s success", ((#file as NSString).lastPathComponent), #line, #function, url.debugDescription)
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)
}
}
}
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 = contentHandler, let bestAttemptContent = bestAttemptContent {
contentHandler(bestAttemptContent)
}
}
}
extension NotificationService {
static func publicKey(encodedPublicKey: String) -> P256.KeyAgreement.PublicKey? {
let publicKeyData = encodedPublicKey.decode85()
return try? P256.KeyAgreement.PublicKey(x963Representation: publicKeyData)
}
}
extension String {
func escape() -> String {
return self
.replacingOccurrences(of: "&", with: "&")
.replacingOccurrences(of: "&lt;", with: "<")
.replacingOccurrences(of: "&gt;", with: ">")
.replacingOccurrences(of: "&quot;", with: "\"")
.replacingOccurrences(of: "&apos;", with: "'")
.replacingOccurrences(of: "&#39;", with: "")
}
}