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// SPDX-License-Identifier: MIT
// Copyright © 2018-2020 WireGuard LLC. All Rights Reserved.
import Foundation
class RecentTunnelsTracker {
private static let keyRecentlyActivatedTunnelNames = "recentlyActivatedTunnelNames"
private static let maxNumberOfTunnels = 10
private static var userDefaults: UserDefaults? {
guard let appGroupId = FileManager.appGroupId else {
wg_log(.error, staticMessage: "Cannot obtain app group ID from bundle for tracking recently used tunnels")
return nil
}
guard let userDefaults = UserDefaults(suiteName: appGroupId) else {
wg_log(.error, staticMessage: "Cannot obtain shared user defaults for tracking recently used tunnels")
return nil
}
return userDefaults
}
static func handleTunnelActivated(tunnelName: String) {
guard let userDefaults = RecentTunnelsTracker.userDefaults else { return }
var recentTunnels = userDefaults.stringArray(forKey: keyRecentlyActivatedTunnelNames) ?? []
if let existingIndex = recentTunnels.firstIndex(of: tunnelName) {
recentTunnels.remove(at: existingIndex)
}
recentTunnels.insert(tunnelName, at: 0)
if recentTunnels.count > maxNumberOfTunnels {
recentTunnels.removeLast(recentTunnels.count - maxNumberOfTunnels)
}
userDefaults.set(recentTunnels, forKey: keyRecentlyActivatedTunnelNames)
}
static func handleTunnelRemoved(tunnelName: String) {
guard let userDefaults = RecentTunnelsTracker.userDefaults else { return }
var recentTunnels = userDefaults.stringArray(forKey: keyRecentlyActivatedTunnelNames) ?? []
if let existingIndex = recentTunnels.firstIndex(of: tunnelName) {
recentTunnels.remove(at: existingIndex)
userDefaults.set(recentTunnels, forKey: keyRecentlyActivatedTunnelNames)
}
}
static func handleTunnelRenamed(oldName: String, newName: String) {
guard let userDefaults = RecentTunnelsTracker.userDefaults else { return }
var recentTunnels = userDefaults.stringArray(forKey: keyRecentlyActivatedTunnelNames) ?? []
if let existingIndex = recentTunnels.firstIndex(of: oldName) {
recentTunnels[existingIndex] = newName
userDefaults.set(recentTunnels, forKey: keyRecentlyActivatedTunnelNames)
}
}
static func cleanupTunnels(except tunnelNamesToKeep: Set<String>) {
guard let userDefaults = RecentTunnelsTracker.userDefaults else { return }
var recentTunnels = userDefaults.stringArray(forKey: keyRecentlyActivatedTunnelNames) ?? []
let oldCount = recentTunnels.count
recentTunnels.removeAll { !tunnelNamesToKeep.contains($0) }
if oldCount != recentTunnels.count {
userDefaults.set(recentTunnels, forKey: keyRecentlyActivatedTunnelNames)
}
}
static func recentlyActivatedTunnelNames(limit: Int) -> [String] {
guard let userDefaults = RecentTunnelsTracker.userDefaults else { return [] }
var recentTunnels = userDefaults.stringArray(forKey: keyRecentlyActivatedTunnelNames) ?? []
if limit < recentTunnels.count {
recentTunnels.removeLast(recentTunnels.count - limit)
}
return recentTunnels
}
}
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