Tusker/Tusker/SavedInstancesManager.swift

62 lines
1.9 KiB
Swift

//
// SavedInstancesManager.swift
// Tusker
//
// Created by Shadowfacts on 12/19/19.
// Copyright © 2019 Shadowfacts. All rights reserved.
//
import Foundation
class SavedInstanceManager: Codable {
private(set) static var shared: SavedInstanceManager = load()
private static var documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
private static var archiveURL = SavedInstanceManager.documentsDirectory.appendingPathComponent("saved_instances").appendingPathExtension("plist")
static func save() {
DispatchQueue.global(qos: .utility).async {
let encoder = PropertyListEncoder()
let data = try? encoder.encode(shared)
try? data?.write(to: archiveURL, options: .noFileProtection)
}
}
static func load() -> SavedInstanceManager {
let decoder = PropertyListDecoder()
if let data = try? Data(contentsOf: archiveURL),
let savedInstanceManager = try? decoder.decode(Self.self, from: data) {
return savedInstanceManager
}
return SavedInstanceManager()
}
private init() {}
private(set) var savedInstances: [URL] = []
func isSaved(_ url: URL) -> Bool {
return savedInstances.contains(url)
}
func add(_ url: URL) {
if isSaved(url) {
return
}
savedInstances.append(url)
SavedInstanceManager.save()
NotificationCenter.default.post(name: .savedInstancesChanged, object: nil)
}
func remove(_ url: URL) {
guard isSaved(url) else { return }
savedInstances.removeAll(where: { $0 == url })
SavedInstanceManager.save()
NotificationCenter.default.post(name: .savedInstancesChanged, object: nil)
}
}
extension Notification.Name {
static let savedInstancesChanged = Notification.Name("savedInstancesChanged")
}