forked from zelo72/mastodon-ios
41 lines
1.3 KiB
Swift
41 lines
1.3 KiB
Swift
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//
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// UserDefaults+Notification.swift
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// AppShared
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//
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// Created by Cirno MainasuK on 2021-10-9.
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//
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import UIKit
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import CryptoKit
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extension UserDefaults {
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// always use hash value (SHA256) from accessToken as key
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private static func deriveKey(from accessToken: String, prefix: String) -> String {
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let digest = SHA256.hash(data: Data(accessToken.utf8))
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let bytes = [UInt8](digest)
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let hex = bytes.toHexString()
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let key = prefix + "@" + hex
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return key
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}
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private static let notificationCountKeyPrefix = "notification_count"
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public func getNotificationCountWithAccessToken(accessToken: String) -> Int {
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let prefix = UserDefaults.notificationCountKeyPrefix
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let key = UserDefaults.deriveKey(from: accessToken, prefix: prefix)
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return integer(forKey: key)
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}
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public func setNotificationCountWithAccessToken(accessToken: String, value: Int) {
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let prefix = UserDefaults.notificationCountKeyPrefix
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let key = UserDefaults.deriveKey(from: accessToken, prefix: prefix)
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setValue(value, forKey: key)
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}
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public func increaseNotificationCount(accessToken: String) {
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let count = getNotificationCountWithAccessToken(accessToken: accessToken)
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setNotificationCountWithAccessToken(accessToken: accessToken, value: count + 1)
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}
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}
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