secretive/Secretive/Controllers/Updater.swift

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2020-03-15 08:01:40 +00:00
import Foundation
import Combine
protocol UpdaterProtocol: ObservableObject {
var update: Release? { get }
}
class Updater: ObservableObject, UpdaterProtocol {
@Published var update: Release?
init() {
checkForUpdates()
let timer = Timer.scheduledTimer(withTimeInterval: 60*60*24, repeats: true) { _ in
self.checkForUpdates()
}
timer.tolerance = 60*60
}
func checkForUpdates() {
URLSession.shared.dataTask(with: Constants.updateURL) { data, _, _ in
guard let data = data else { return }
guard let release = try? JSONDecoder().decode(Release.self, from: data) else { return }
self.evaluate(release: release)
}.resume()
}
func evaluate(release: Release) {
let latestVersion = semVer(from: release.name)
let currentVersion = semVer(from: Bundle.main.infoDictionary!["CFBundleShortVersionString"] as! String)
for (latest, current) in zip(latestVersion, currentVersion) {
if latest > current {
DispatchQueue.main.async {
self.update = release
}
return
}
}
}
func semVer(from stringVersion: String) -> [Int] {
var split = stringVersion.split(separator: ".").compactMap { Int($0) }
while split.count < 3 {
split.append(0)
}
return split
}
}
extension Updater {
enum Constants {
static let updateURL = URL(string: "https://api.github.com/repos/maxgoedjen/secretive/releases/latest")!
}
}
struct Release: Codable {
let name: String
let html_url: URL
let body: String
}
extension Release {
var critical: Bool {
return body.contains(Constants.securityContent)
}
}
extension Release {
enum Constants {
static let securityContent = "Critical Security Update"
}
}