108 lines
3.4 KiB
Swift
108 lines
3.4 KiB
Swift
//
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// ExtensionContainersFile.swift
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// NetNewsWire-iOS
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//
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// Created by Maurice Parker on 2/10/20.
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// Copyright © 2020 Ranchero Software. All rights reserved.
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//
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import Foundation
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import os.log
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import RSCore
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import RSParser
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import Account
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final class ExtensionContainersFile {
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private static var log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "extensionContainersFile")
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private static var filePath: String = {
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let appGroup = Bundle.main.object(forInfoDictionaryKey: "AppGroup") as! String
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let containerURL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: appGroup)
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return containerURL!.appendingPathComponent("extension_containers.plist").path
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}()
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private var isDirty = false {
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didSet {
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queueSaveToDiskIfNeeded()
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}
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}
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private let saveQueue = CoalescingQueue(name: "Save Queue", interval: 0.5)
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init() {
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if !FileManager.default.fileExists(atPath: ExtensionContainersFile.filePath) {
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save()
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}
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NotificationCenter.default.addObserver(self, selector: #selector(markAsDirty), name: .UserDidAddAccount, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(markAsDirty), name: .UserDidDeleteAccount, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(markAsDirty), name: .AccountStateDidChange, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(markAsDirty), name: .ChildrenDidChange, object: nil)
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}
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/// Reads and decodes the shared plist file.
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static func read() -> ExtensionContainers? {
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let errorPointer: NSErrorPointer = nil
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let fileCoordinator = NSFileCoordinator()
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let fileURL = URL(fileURLWithPath: ExtensionContainersFile.filePath)
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var extensionContainers: ExtensionContainers? = nil
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fileCoordinator.coordinate(readingItemAt: fileURL, options: [], error: errorPointer, byAccessor: { readURL in
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if let fileData = try? Data(contentsOf: readURL) {
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let decoder = PropertyListDecoder()
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extensionContainers = try? decoder.decode(ExtensionContainers.self, from: fileData)
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}
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})
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if let error = errorPointer?.pointee {
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os_log(.error, log: log, "Read from disk coordination failed: %@.", error.localizedDescription)
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}
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return extensionContainers
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}
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}
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private extension ExtensionContainersFile {
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@objc func markAsDirty() {
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isDirty = true
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}
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func queueSaveToDiskIfNeeded() {
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saveQueue.add(self, #selector(saveToDiskIfNeeded))
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}
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@objc func saveToDiskIfNeeded() {
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if isDirty {
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isDirty = false
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save()
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}
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}
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func save() {
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let encoder = PropertyListEncoder()
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encoder.outputFormat = .binary
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let errorPointer: NSErrorPointer = nil
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let fileCoordinator = NSFileCoordinator()
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let fileURL = URL(fileURLWithPath: ExtensionContainersFile.filePath)
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fileCoordinator.coordinate(writingItemAt: fileURL, options: [], error: errorPointer, byAccessor: { writeURL in
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do {
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let extensionAccounts = AccountManager.shared.sortedActiveAccounts.map { ExtensionAccount(account: $0) }
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let extensionContainers = ExtensionContainers(accounts: extensionAccounts)
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let data = try encoder.encode(extensionContainers)
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try data.write(to: writeURL)
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} catch let error as NSError {
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os_log(.error, log: Self.log, "Save to disk failed: %@.", error.localizedDescription)
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}
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})
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if let error = errorPointer?.pointee {
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os_log(.error, log: Self.log, "Save to disk coordination failed: %@.", error.localizedDescription)
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}
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}
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}
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