124 lines
4.6 KiB
Swift
124 lines
4.6 KiB
Swift
import Foundation
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import Combine
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/// A concrete implementation of ``UpdaterProtocol`` which considers the current release and OS version.
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public actor Updater: ObservableObject, UpdaterProtocol {
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@MainActor @Published public var update: Release?
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public let testBuild: Bool
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/// The current OS version.
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private let osVersion: SemVer
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/// The current version of the app that is running.
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private let currentVersion: SemVer
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/// The timer responsible for checking for updates regularly.
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private var timer: Timer? = nil
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/// Initializes an Updater.
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/// - Parameters:
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/// - osVersion: The current OS version.
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/// - currentVersion: The current version of the app that is running.
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public init(osVersion: SemVer = SemVer(ProcessInfo.processInfo.operatingSystemVersion), currentVersion: SemVer = SemVer(Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "0.0.0")) {
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self.osVersion = osVersion
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self.currentVersion = currentVersion
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testBuild = currentVersion == SemVer("0.0.0")
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}
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/// Begins checking for updates with the specified frequency.
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/// - Parameter checkFrequency: The interval at which the Updater should check for updates. Subject to a tolerance of 1 hour.
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public func beginChecking(checkFrequency: TimeInterval = Measurement(value: 24, unit: UnitDuration.hours).converted(to: .seconds).value) {
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timer?.invalidate()
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timer = Timer.scheduledTimer(withTimeInterval: checkFrequency, repeats: true) { _ in
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Task {
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await self.checkForUpdates()
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}
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}
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timer?.tolerance = 60*60
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}
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/// Ends checking for updates.
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public func stopChecking() {
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timer?.invalidate()
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timer = nil
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}
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/// Manually trigger an update check.
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public func checkForUpdates() async {
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guard let (data, _) = try? await URLSession.shared.data(from: Constants.updateURL),
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let releases = try? JSONDecoder().decode([Release].self, from: data) else { return }
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await evaluate(releases: releases)
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}
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/// Ignores a specified release. `update` will be nil if the user has ignored the latest available release.
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/// - Parameter release: The release to ignore.
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public func ignore(release: Release) async {
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guard !release.critical else { return }
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defaults.set(true, forKey: release.name)
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await setUpdate(update: update)
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}
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}
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extension Updater {
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/// Evaluates the available downloadable releases, and selects the newest non-prerelease release that the user is able to run.
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/// - Parameter releases: An array of ``Release`` objects.
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func evaluate(releases: [Release]) async {
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guard let release = releases
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.sorted()
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.reversed()
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.filter({ !$0.prerelease })
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.first(where: { $0.minimumOSVersion <= osVersion }) else { return }
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guard !userIgnored(release: release) else { return }
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guard !release.prerelease else { return }
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let latestVersion = SemVer(release.name)
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if latestVersion > currentVersion {
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await setUpdate(update: update)
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}
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}
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@MainActor private func setUpdate(update: Release?) {
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self.update = update
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}
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/// Checks whether the user has ignored a release.
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/// - Parameter release: The release to check.
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/// - Returns: A boolean describing whether the user has ignored the release. Will always be false if the release is critical.
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func userIgnored(release: Release) -> Bool {
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guard !release.critical else { return false }
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return defaults.bool(forKey: release.name)
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}
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/// The user defaults used to store user ignore state.
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var defaults: UserDefaults {
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UserDefaults(suiteName: "com.maxgoedjen.Secretive.updater.ignorelist")!
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}
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}
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extension Updater {
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enum Constants {
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static let updateURL = URL(string: "https://api.github.com/repos/maxgoedjen/secretive/releases")!
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}
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}
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@available(macOS, deprecated: 12)
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extension URLSession {
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// Backport for macOS 11
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func data(from url: URL) async throws -> (Data, URLResponse) {
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try await withCheckedThrowingContinuation { continuation in
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URLSession.shared.dataTask(with: url) { data, response, error in
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guard let data = data, let response = response else {
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continuation.resume(throwing: error ?? NSError(domain: NSURLErrorDomain, code: NSURLErrorUnknown, userInfo: nil))
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return
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}
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continuation.resume(returning: (data, response))
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}
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}
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}
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}
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