418 lines
11 KiB
Swift
418 lines
11 KiB
Swift
//
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// AccountManager.swift
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// NetNewsWire
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//
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// Created by Brent Simmons on 7/18/15.
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// Copyright © 2015 Ranchero Software, LLC. All rights reserved.
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//
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import Foundation
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import RSCore
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import Articles
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import ArticlesDatabase
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// Main thread only.
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public final class AccountManager: UnreadCountProvider {
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public static var shared: AccountManager!
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public let defaultAccount: Account
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private let accountsFolder: String
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private var accountsDictionary = [String: Account]()
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private let defaultAccountFolderName = "OnMyMac"
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private let defaultAccountIdentifier = "OnMyMac"
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public var isSuspended = false
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public var isUnreadCountsInitialized: Bool {
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for account in activeAccounts {
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if !account.isUnreadCountsInitialized {
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return false
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}
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}
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return true
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}
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public var unreadCount = 0 {
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didSet {
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if unreadCount != oldValue {
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postUnreadCountDidChangeNotification()
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}
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}
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}
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public var accounts: [Account] {
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return Array(accountsDictionary.values)
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}
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public var sortedAccounts: [Account] {
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return sortByName(accounts)
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}
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public var activeAccounts: [Account] {
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assert(Thread.isMainThread)
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return Array(accountsDictionary.values.filter { $0.isActive })
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}
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public var sortedActiveAccounts: [Account] {
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return sortByName(activeAccounts)
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}
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public var lastArticleFetchEndTime: Date? {
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var lastArticleFetchEndTime: Date? = nil
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for account in activeAccounts {
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if let accountLastArticleFetchEndTime = account.metadata.lastArticleFetchEndTime {
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if lastArticleFetchEndTime == nil || lastArticleFetchEndTime! < accountLastArticleFetchEndTime {
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lastArticleFetchEndTime = accountLastArticleFetchEndTime
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}
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}
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}
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return lastArticleFetchEndTime
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}
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public func findActiveAccount(forDisplayName displayName: String) -> Account? {
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return AccountManager.shared.activeAccounts.first(where: { $0.nameForDisplay == displayName })
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}
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public var refreshInProgress: Bool {
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for account in activeAccounts {
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if account.refreshInProgress {
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return true
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}
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}
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return false
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}
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public var combinedRefreshProgress: CombinedRefreshProgress {
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let downloadProgressArray = activeAccounts.map { $0.refreshProgress }
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return CombinedRefreshProgress(downloadProgressArray: downloadProgressArray)
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}
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public init(accountsFolder: String) {
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self.accountsFolder = accountsFolder
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// The local "On My Mac" account must always exist, even if it's empty.
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let localAccountFolder = (accountsFolder as NSString).appendingPathComponent("OnMyMac")
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do {
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try FileManager.default.createDirectory(atPath: localAccountFolder, withIntermediateDirectories: true, attributes: nil)
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}
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catch {
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assertionFailure("Could not create folder for OnMyMac account.")
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abort()
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}
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defaultAccount = Account(dataFolder: localAccountFolder, type: .onMyMac, accountID: defaultAccountIdentifier)!
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accountsDictionary[defaultAccount.accountID] = defaultAccount
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readAccountsFromDisk()
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NotificationCenter.default.addObserver(self, selector: #selector(unreadCountDidInitialize(_:)), name: .UnreadCountDidInitialize, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(unreadCountDidChange(_:)), name: .UnreadCountDidChange, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(accountStateDidChange(_:)), name: .AccountStateDidChange, object: nil)
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DispatchQueue.main.async {
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self.updateUnreadCount()
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}
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}
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// MARK: - API
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public func createAccount(type: AccountType) -> Account {
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let accountID = UUID().uuidString
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let accountFolder = (accountsFolder as NSString).appendingPathComponent("\(type.rawValue)_\(accountID)")
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do {
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try FileManager.default.createDirectory(atPath: accountFolder, withIntermediateDirectories: true, attributes: nil)
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} catch {
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assertionFailure("Could not create folder for \(accountID) account.")
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abort()
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}
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let account = Account(dataFolder: accountFolder, type: type, accountID: accountID)!
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accountsDictionary[accountID] = account
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var userInfo = [String: Any]()
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userInfo[Account.UserInfoKey.account] = account
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NotificationCenter.default.post(name: .UserDidAddAccount, object: self, userInfo: userInfo)
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return account
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}
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public func deleteAccount(_ account: Account) {
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guard !account.refreshInProgress else {
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return
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}
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account.prepareForDeletion()
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accountsDictionary.removeValue(forKey: account.accountID)
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account.isDeleted = true
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do {
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try FileManager.default.removeItem(atPath: account.dataFolder)
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}
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catch {
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assertionFailure("Could not create folder for OnMyMac account.")
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abort()
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}
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updateUnreadCount()
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var userInfo = [String: Any]()
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userInfo[Account.UserInfoKey.account] = account
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NotificationCenter.default.post(name: .UserDidDeleteAccount, object: self, userInfo: userInfo)
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}
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public func existingAccount(with accountID: String) -> Account? {
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return accountsDictionary[accountID]
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}
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public func suspendNetworkAll() {
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isSuspended = true
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accounts.forEach { $0.suspendNetwork() }
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}
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public func suspendDatabaseAll() {
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accounts.forEach { $0.suspendDatabase() }
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}
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public func resumeAll() {
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isSuspended = false
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accounts.forEach { $0.resumeDatabaseAndDelegate() }
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accounts.forEach { $0.resume() }
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}
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public func refreshAll(errorHandler: @escaping (Error) -> Void, completion: (() ->Void)? = nil) {
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let group = DispatchGroup()
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activeAccounts.forEach { account in
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group.enter()
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account.refreshAll() { result in
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group.leave()
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switch result {
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case .success:
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break
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case .failure(let error):
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errorHandler(error)
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}
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}
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}
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group.notify(queue: DispatchQueue.main) {
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completion?()
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}
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}
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public func syncArticleStatusAll(completion: (() -> Void)? = nil) {
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let group = DispatchGroup()
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activeAccounts.forEach {
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group.enter()
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$0.syncArticleStatus() { _ in
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group.leave()
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}
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}
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group.notify(queue: DispatchQueue.global(qos: .background)) {
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completion?()
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}
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}
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public func saveAll() {
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accounts.forEach { $0.save() }
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}
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public func anyAccountHasAtLeastOneFeed() -> Bool {
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for account in activeAccounts {
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if account.hasAtLeastOneWebFeed() {
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return true
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}
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}
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return false
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}
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public func anyAccountHasFeedWithURL(_ urlString: String) -> Bool {
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for account in activeAccounts {
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if let _ = account.existingWebFeed(withURL: urlString) {
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return true
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}
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}
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return false
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}
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// MARK: - Fetching Articles
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// These fetch articles from active accounts and return a merged Set<Article>.
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public func fetchArticles(_ fetchType: FetchType) throws -> Set<Article> {
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precondition(Thread.isMainThread)
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var articles = Set<Article>()
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for account in activeAccounts {
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articles.formUnion(try account.fetchArticles(fetchType))
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}
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return articles
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}
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public func fetchArticlesAsync(_ fetchType: FetchType, _ completion: @escaping ArticleSetResultBlock) {
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precondition(Thread.isMainThread)
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var allFetchedArticles = Set<Article>()
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let numberOfAccounts = activeAccounts.count
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var accountsReporting = 0
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guard numberOfAccounts > 0 else {
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completion(.success(allFetchedArticles))
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return
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}
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for account in activeAccounts {
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account.fetchArticlesAsync(fetchType) { (articleSetResult) in
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accountsReporting += 1
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switch articleSetResult {
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case .success(let articles):
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allFetchedArticles.formUnion(articles)
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if accountsReporting == numberOfAccounts {
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completion(.success(allFetchedArticles))
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}
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case .failure(let databaseError):
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completion(.failure(databaseError))
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return
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}
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}
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}
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}
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// MARK: - Caches
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/// Empty caches that can reasonably be emptied — when the app moves to the background, for instance.
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public func emptyCaches() {
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for account in accounts {
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account.emptyCaches()
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}
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}
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// MARK: - Notifications
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@objc func unreadCountDidInitialize(_ notification: Notification) {
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guard let _ = notification.object as? Account else {
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return
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}
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if isUnreadCountsInitialized {
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postUnreadCountDidInitializeNotification()
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}
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}
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@objc dynamic func unreadCountDidChange(_ notification: Notification) {
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guard let _ = notification.object as? Account else {
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return
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}
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updateUnreadCount()
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}
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@objc func accountStateDidChange(_ notification: Notification) {
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updateUnreadCount()
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}
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}
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// MARK: - Private
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private extension AccountManager {
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func updateUnreadCount() {
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unreadCount = calculateUnreadCount(activeAccounts)
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}
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func loadAccount(_ accountSpecifier: AccountSpecifier) -> Account? {
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return Account(dataFolder: accountSpecifier.folderPath, type: accountSpecifier.type, accountID: accountSpecifier.identifier)
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}
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func loadAccount(_ filename: String) -> Account? {
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let folderPath = (accountsFolder as NSString).appendingPathComponent(filename)
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if let accountSpecifier = AccountSpecifier(folderPath: folderPath) {
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return loadAccount(accountSpecifier)
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}
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return nil
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}
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func readAccountsFromDisk() {
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var filenames: [String]?
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do {
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filenames = try FileManager.default.contentsOfDirectory(atPath: accountsFolder)
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}
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catch {
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print("Error reading Accounts folder: \(error)")
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return
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}
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filenames?.forEach { (oneFilename) in
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guard oneFilename != defaultAccountFolderName else {
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return
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}
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if let oneAccount = loadAccount(oneFilename) {
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accountsDictionary[oneAccount.accountID] = oneAccount
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}
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}
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}
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func sortByName(_ accounts: [Account]) -> [Account] {
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// LocalAccount is first.
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return accounts.sorted { (account1, account2) -> Bool in
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if account1 === defaultAccount {
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return true
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}
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if account2 === defaultAccount {
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return false
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}
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return (account1.nameForDisplay as NSString).localizedStandardCompare(account2.nameForDisplay) == .orderedAscending
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}
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}
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}
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private struct AccountSpecifier {
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let type: AccountType
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let identifier: String
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let folderPath: String
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let folderName: String
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let dataFilePath: String
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init?(folderPath: String) {
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if !FileManager.default.isFolder(atPath: folderPath) {
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return nil
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}
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let name = NSString(string: folderPath).lastPathComponent
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if name.hasPrefix(".") {
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return nil
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}
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let nameComponents = name.components(separatedBy: "_")
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guard nameComponents.count == 2, let rawType = Int(nameComponents[0]), let accountType = AccountType(rawValue: rawType) else {
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return nil
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}
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self.folderPath = folderPath
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self.folderName = name
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self.type = accountType
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self.identifier = nameComponents[1]
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self.dataFilePath = AccountSpecifier.accountFilePathWithFolder(self.folderPath)
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}
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private static let accountDataFileName = "AccountData.plist"
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private static func accountFilePathWithFolder(_ folderPath: String) -> String {
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return NSString(string: folderPath).appendingPathComponent(accountDataFileName)
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}
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}
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