mastodon-app-ufficiale-ipho.../AppShared/UserDefaults+Notification.s...

41 lines
1.3 KiB
Swift

//
// UserDefaults+Notification.swift
// AppShared
//
// Created by Cirno MainasuK on 2021-10-9.
//
import UIKit
import CryptoKit
extension UserDefaults {
// always use hash value (SHA256) from accessToken as key
private static func deriveKey(from accessToken: String, prefix: String) -> String {
let digest = SHA256.hash(data: Data(accessToken.utf8))
let bytes = [UInt8](digest)
let hex = bytes.toHexString()
let key = prefix + "@" + hex
return key
}
private static let notificationCountKeyPrefix = "notification_count"
public func getNotificationCountWithAccessToken(accessToken: String) -> Int {
let prefix = UserDefaults.notificationCountKeyPrefix
let key = UserDefaults.deriveKey(from: accessToken, prefix: prefix)
return integer(forKey: key)
}
public func setNotificationCountWithAccessToken(accessToken: String, value: Int) {
let prefix = UserDefaults.notificationCountKeyPrefix
let key = UserDefaults.deriveKey(from: accessToken, prefix: prefix)
setValue(value, forKey: key)
}
public func increaseNotificationCount(accessToken: String) {
let count = getNotificationCountWithAccessToken(accessToken: accessToken)
setNotificationCountWithAccessToken(accessToken: accessToken, value: count + 1)
}
}