// // FeedbinAccountDelegate.swift // Account // // Created by Maurice Parker on 5/2/19. // Copyright © 2019 Ranchero Software, LLC. All rights reserved. // import Articles import RSCore import RSParser import RSWeb import SyncDatabase import os.log public enum FeedbinAccountDelegateError: String, Error { case invalidParameter = "There was an invalid parameter passed." } final class FeedbinAccountDelegate: AccountDelegate { private let database: SyncDatabase private let caller: FeedbinAPICaller private var log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "Feedbin") let behaviors: AccountBehaviors = [.disallowFeedCopyInRootFolder] let server: String? = "api.feedbin.com" var isOPMLImportInProgress = false var credentials: Credentials? { didSet { caller.credentials = credentials } } weak var accountMetadata: AccountMetadata? { didSet { caller.accountMetadata = accountMetadata } } init(dataFolder: String, transport: Transport?) { let databaseFilePath = (dataFolder as NSString).appendingPathComponent("Sync.sqlite3") database = SyncDatabase(databaseFilePath: databaseFilePath) if transport != nil { caller = FeedbinAPICaller(transport: transport!) } else { let sessionConfiguration = URLSessionConfiguration.default sessionConfiguration.requestCachePolicy = .reloadIgnoringLocalCacheData sessionConfiguration.timeoutIntervalForRequest = 60.0 sessionConfiguration.httpShouldSetCookies = false sessionConfiguration.httpCookieAcceptPolicy = .never sessionConfiguration.httpMaximumConnectionsPerHost = 1 sessionConfiguration.httpCookieStorage = nil sessionConfiguration.urlCache = nil if let userAgentHeaders = UserAgent.headers() { sessionConfiguration.httpAdditionalHeaders = userAgentHeaders } caller = FeedbinAPICaller(transport: URLSession(configuration: sessionConfiguration)) } } var refreshProgress = DownloadProgress(numberOfTasks: 0) func refreshAll(for account: Account, completion: @escaping (Result) -> Void) { retrieveCredentialsIfNecessary(account) refreshProgress.addToNumberOfTasksAndRemaining(6) refreshAccount(account) { result in switch result { case .success(): self.sendArticleStatus(for: account) { self.refreshArticleStatus(for: account) { self.refreshArticles(account) { self.refreshMissingArticles(account) { self.refreshProgress.clear() DispatchQueue.main.async { completion(.success(())) } } } } } case .failure(let error): DispatchQueue.main.async { self.refreshProgress.clear() let wrappedError = AccountError.wrappedError(error: error, account: account) completion(.failure(wrappedError)) } } } } func sendArticleStatus(for account: Account, completion: @escaping (() -> Void)) { retrieveCredentialsIfNecessary(account) os_log(.debug, log: log, "Sending article statuses...") let syncStatuses = database.selectForProcessing() let createUnreadStatuses = syncStatuses.filter { $0.key == ArticleStatus.Key.read && $0.flag == false } let deleteUnreadStatuses = syncStatuses.filter { $0.key == ArticleStatus.Key.read && $0.flag == true } let createStarredStatuses = syncStatuses.filter { $0.key == ArticleStatus.Key.starred && $0.flag == true } let deleteStarredStatuses = syncStatuses.filter { $0.key == ArticleStatus.Key.starred && $0.flag == false } let group = DispatchGroup() group.enter() sendArticleStatuses(createUnreadStatuses, apiCall: caller.createUnreadEntries) { group.leave() } group.enter() sendArticleStatuses(deleteUnreadStatuses, apiCall: caller.deleteUnreadEntries) { group.leave() } group.enter() sendArticleStatuses(createStarredStatuses, apiCall: caller.createStarredEntries) { group.leave() } group.enter() sendArticleStatuses(deleteStarredStatuses, apiCall: caller.deleteStarredEntries) { group.leave() } group.notify(queue: DispatchQueue.main) { os_log(.debug, log: self.log, "Done sending article statuses.") completion() } } func refreshArticleStatus(for account: Account, completion: @escaping (() -> Void)) { retrieveCredentialsIfNecessary(account) os_log(.debug, log: log, "Refreshing article statuses...") let group = DispatchGroup() group.enter() caller.retrieveUnreadEntries() { result in switch result { case .success(let articleIDs): self.syncArticleReadState(account: account, articleIDs: articleIDs) group.leave() case .failure(let error): os_log(.info, log: self.log, "Retrieving unread entries failed: %@.", error.localizedDescription) group.leave() } } group.enter() caller.retrieveStarredEntries() { result in switch result { case .success(let articleIDs): self.syncArticleStarredState(account: account, articleIDs: articleIDs) group.leave() case .failure(let error): os_log(.info, log: self.log, "Retrieving starred entries failed: %@.", error.localizedDescription) group.leave() } } group.notify(queue: DispatchQueue.main) { os_log(.debug, log: self.log, "Done refreshing article statuses.") completion() } } func importOPML(for account:Account, opmlFile: URL, completion: @escaping (Result) -> Void) { retrieveCredentialsIfNecessary(account) var fileData: Data? do { fileData = try Data(contentsOf: opmlFile) } catch { completion(.failure(error)) return } guard let opmlData = fileData else { completion(.success(())) return } os_log(.debug, log: log, "Begin importing OPML...") isOPMLImportInProgress = true refreshProgress.addToNumberOfTasksAndRemaining(1) caller.importOPML(opmlData: opmlData) { result in switch result { case .success(let importResult): if importResult.complete { os_log(.debug, log: self.log, "Import OPML done.") self.refreshProgress.completeTask() self.isOPMLImportInProgress = false DispatchQueue.main.async { completion(.success(())) } } else { self.checkImportResult(opmlImportResultID: importResult.importResultID, completion: completion) } case .failure(let error): os_log(.debug, log: self.log, "Import OPML failed.") self.refreshProgress.completeTask() self.isOPMLImportInProgress = false DispatchQueue.main.async { let wrappedError = AccountError.wrappedError(error: error, account: account) completion(.failure(wrappedError)) } } } } func addFolder(for account: Account, name: String, completion: @escaping (Result) -> Void) { retrieveCredentialsIfNecessary(account) if let folder = account.ensureFolder(with: name) { completion(.success(folder)) } else { completion(.failure(FeedbinAccountDelegateError.invalidParameter)) } } func renameFolder(for account: Account, with folder: Folder, to name: String, completion: @escaping (Result) -> Void) { retrieveCredentialsIfNecessary(account) guard folder.hasAtLeastOneFeed() else { folder.name = name return } refreshProgress.addToNumberOfTasksAndRemaining(1) caller.renameTag(oldName: folder.name ?? "", newName: name) { result in self.refreshProgress.completeTask() switch result { case .success: DispatchQueue.main.async { self.renameFolderRelationship(for: account, fromName: folder.name ?? "", toName: name) folder.name = name completion(.success(())) } case .failure(let error): DispatchQueue.main.async { let wrappedError = AccountError.wrappedError(error: error, account: account) completion(.failure(wrappedError)) } } } } func removeFolder(for account: Account, with folder: Folder, completion: @escaping (Result) -> Void) { retrieveCredentialsIfNecessary(account) // Feedbin uses tags and if at least one feed isn't tagged, then the folder doesn't exist on their system guard folder.hasAtLeastOneFeed() else { account.removeFolder(folder) completion(.success(())) return } let group = DispatchGroup() for feed in folder.topLevelFeeds { if feed.folderRelationship?.count ?? 0 > 1 { if let feedTaggingID = feed.folderRelationship?[folder.name ?? ""] { group.enter() refreshProgress.addToNumberOfTasksAndRemaining(1) caller.deleteTagging(taggingID: feedTaggingID) { result in self.refreshProgress.completeTask() group.leave() switch result { case .success: DispatchQueue.main.async { self.clearFolderRelationship(for: feed, withFolderName: folder.name ?? "") } case .failure(let error): os_log(.error, log: self.log, "Remove feed error: %@.", error.localizedDescription) } } } } else { if let subscriptionID = feed.subscriptionID { group.enter() refreshProgress.addToNumberOfTasksAndRemaining(1) caller.deleteSubscription(subscriptionID: subscriptionID) { result in self.refreshProgress.completeTask() group.leave() switch result { case .success: DispatchQueue.main.async { account.clearFeedMetadata(feed) } case .failure(let error): os_log(.error, log: self.log, "Remove feed error: %@.", error.localizedDescription) } } } } } group.notify(queue: DispatchQueue.main) { account.removeFolder(folder) completion(.success(())) } } func createFeed(for account: Account, url: String, name: String?, container: Container, completion: @escaping (Result) -> Void) { retrieveCredentialsIfNecessary(account) refreshProgress.addToNumberOfTasksAndRemaining(1) caller.createSubscription(url: url) { result in self.refreshProgress.completeTask() switch result { case .success(let subResult): switch subResult { case .created(let subscription): self.createFeed(account: account, subscription: subscription, name: name, container: container, completion: completion) case .multipleChoice(let choices): self.decideBestFeedChoice(account: account, url: url, name: name, container: container, choices: choices, completion: completion) case .alreadySubscribed: DispatchQueue.main.async { completion(.failure(AccountError.createErrorAlreadySubscribed)) } case .notFound: DispatchQueue.main.async { completion(.failure(AccountError.createErrorNotFound)) } } case .failure(let error): DispatchQueue.main.async { let wrappedError = AccountError.wrappedError(error: error, account: account) completion(.failure(wrappedError)) } } } } func renameFeed(for account: Account, with feed: Feed, to name: String, completion: @escaping (Result) -> Void) { retrieveCredentialsIfNecessary(account) // This error should never happen guard let subscriptionID = feed.subscriptionID else { completion(.failure(FeedbinAccountDelegateError.invalidParameter)) return } refreshProgress.addToNumberOfTasksAndRemaining(1) caller.renameSubscription(subscriptionID: subscriptionID, newName: name) { result in self.refreshProgress.completeTask() switch result { case .success: DispatchQueue.main.async { feed.editedName = name completion(.success(())) } case .failure(let error): DispatchQueue.main.async { let wrappedError = AccountError.wrappedError(error: error, account: account) completion(.failure(wrappedError)) } } } } func removeFeed(for account: Account, with feed: Feed, from container: Container, completion: @escaping (Result) -> Void) { if feed.folderRelationship?.count ?? 0 > 1 { deleteTagging(for: account, with: feed, from: container, completion: completion) } else { deleteSubscription(for: account, with: feed, from: container, completion: completion) } } func moveFeed(for account: Account, with feed: Feed, from: Container, to: Container, completion: @escaping (Result) -> Void) { retrieveCredentialsIfNecessary(account) if from is Account { addFeed(for: account, with: feed, to: to, completion: completion) } else { deleteTagging(for: account, with: feed, from: from) { result in switch result { case .success: self.addFeed(for: account, with: feed, to: to, completion: completion) case .failure(let error): completion(.failure(error)) } } } } func addFeed(for account: Account, with feed: Feed, to container: Container, completion: @escaping (Result) -> Void) { retrieveCredentialsIfNecessary(account) if let folder = container as? Folder, let feedID = Int(feed.feedID) { refreshProgress.addToNumberOfTasksAndRemaining(1) caller.createTagging(feedID: feedID, name: folder.name ?? "") { result in self.refreshProgress.completeTask() switch result { case .success(let taggingID): DispatchQueue.main.async { self.saveFolderRelationship(for: feed, withFolderName: folder.name ?? "", id: String(taggingID)) account.removeFeed(feed) folder.addFeed(feed) completion(.success(())) } case .failure(let error): DispatchQueue.main.async { let wrappedError = AccountError.wrappedError(error: error, account: account) completion(.failure(wrappedError)) } } } } else { DispatchQueue.main.async { if let account = container as? Account { account.addFeedIfNotInAnyFolder(feed) } completion(.success(())) } } } func restoreFeed(for account: Account, feed: Feed, container: Container, completion: @escaping (Result) -> Void) { retrieveCredentialsIfNecessary(account) if let existingFeed = account.existingFeed(withURL: feed.url) { account.addFeed(existingFeed, to: container) { result in switch result { case .success: completion(.success(())) case .failure(let error): completion(.failure(error)) } } } else { createFeed(for: account, url: feed.url, name: feed.editedName, container: container) { result in switch result { case .success: completion(.success(())) case .failure(let error): completion(.failure(error)) } } } } func restoreFolder(for account: Account, folder: Folder, completion: @escaping (Result) -> Void) { retrieveCredentialsIfNecessary(account) let group = DispatchGroup() for feed in folder.topLevelFeeds { folder.topLevelFeeds.remove(feed) group.enter() restoreFeed(for: account, feed: feed, container: folder) { result in group.leave() switch result { case .success: break case .failure(let error): os_log(.error, log: self.log, "Restore folder feed error: %@.", error.localizedDescription) } } } group.notify(queue: DispatchQueue.main) { account.addFolder(folder) completion(.success(())) } } func markArticles(for account: Account, articles: Set
, statusKey: ArticleStatus.Key, flag: Bool) -> Set
? { retrieveCredentialsIfNecessary(account) let syncStatuses = articles.map { article in return SyncStatus(articleID: article.articleID, key: statusKey, flag: flag) } database.insertStatuses(syncStatuses) if database.selectPendingCount() > 100 { sendArticleStatus(for: account) {} } return account.update(articles, statusKey: statusKey, flag: flag) } func accountDidInitialize(_ account: Account) { credentials = try? account.retrieveCredentials(type: .basic) } static func validateCredentials(transport: Transport, credentials: Credentials, endpoint: URL? = nil, completion: @escaping (Result) -> Void) { let caller = FeedbinAPICaller(transport: transport) caller.credentials = credentials caller.validateCredentials() { result in DispatchQueue.main.async { completion(result) } } } } // MARK: Private private extension FeedbinAccountDelegate { func checkImportResult(opmlImportResultID: Int, completion: @escaping (Result) -> Void) { DispatchQueue.main.async { Timer.scheduledTimer(withTimeInterval: 15, repeats: true) { timer in os_log(.debug, log: self.log, "Checking status of OPML import...") self.caller.retrieveOPMLImportResult(importID: opmlImportResultID) { result in switch result { case .success(let importResult): if let result = importResult, result.complete { os_log(.debug, log: self.log, "Checking status of OPML import successfully completed.") timer.invalidate() self.refreshProgress.completeTask() self.isOPMLImportInProgress = false DispatchQueue.main.async { completion(.success(())) } } case .failure(let error): os_log(.debug, log: self.log, "Import OPML check failed.") timer.invalidate() self.refreshProgress.completeTask() self.isOPMLImportInProgress = false DispatchQueue.main.async { completion(.failure(error)) } } } } } } func refreshAccount(_ account: Account, completion: @escaping (Result) -> Void) { caller.retrieveTags { result in switch result { case .success(let tags): self.refreshProgress.completeTask() self.caller.retrieveSubscriptions { result in switch result { case .success(let subscriptions): self.refreshProgress.completeTask() self.forceExpireFolderFeedRelationship(account, tags) self.caller.retrieveTaggings { result in switch result { case .success(let taggings): self.refreshProgress.completeTask() self.caller.retrieveIcons { result in switch result { case .success(let icons): BatchUpdate.shared.perform { self.syncFolders(account, tags) self.syncFeeds(account, subscriptions) self.syncFeedFolderRelationship(account, taggings) self.syncFavicons(account, icons) } self.refreshProgress.completeTask() completion(.success(())) case .failure(let error): completion(.failure(error)) } } case .failure(let error): completion(.failure(error)) } } case .failure(let error): completion(.failure(error)) } } case .failure(let error): completion(.failure(error)) } } } // This function can be deleted if Feedbin updates their taggings.json service to // show a change when a tag is renamed. func forceExpireFolderFeedRelationship(_ account: Account, _ tags: [FeedbinTag]?) { guard let tags = tags else { return } let folderNames: [String] = { if let folders = account.folders { return folders.map { $0.name ?? "" } } else { return [String]() } }() // Feedbin has a tag that we don't have a folder for. We might not get a new // taggings response for it if it is a folder rename. Force expire the tagging // so that we will for sure get the new tagging information. tags.forEach { tag in if !folderNames.contains(tag.name) { accountMetadata?.conditionalGetInfo[FeedbinAPICaller.ConditionalGetKeys.taggings] = nil } } } func syncFolders(_ account: Account, _ tags: [FeedbinTag]?) { guard let tags = tags else { return } assert(Thread.isMainThread) os_log(.debug, log: log, "Syncing folders with %ld tags.", tags.count) let tagNames = tags.map { $0.name } // Delete any folders not at Feedbin if let folders = account.folders { folders.forEach { folder in if !tagNames.contains(folder.name ?? "") { for feed in folder.topLevelFeeds { account.addFeed(feed) clearFolderRelationship(for: feed, withFolderName: folder.name ?? "") } account.removeFolder(folder) } } } let folderNames: [String] = { if let folders = account.folders { return folders.map { $0.name ?? "" } } else { return [String]() } }() // Make any folders Feedbin has, but we don't tagNames.forEach { tagName in if !folderNames.contains(tagName) { _ = account.ensureFolder(with: tagName) } } } func syncFeeds(_ account: Account, _ subscriptions: [FeedbinSubscription]?) { guard let subscriptions = subscriptions else { return } assert(Thread.isMainThread) os_log(.debug, log: log, "Syncing feeds with %ld subscriptions.", subscriptions.count) let subFeedIds = subscriptions.map { String($0.feedID) } // Remove any feeds that are no longer in the subscriptions if let folders = account.folders { for folder in folders { for feed in folder.topLevelFeeds { if !subFeedIds.contains(feed.feedID) { folder.removeFeed(feed) } } } } for feed in account.topLevelFeeds { if !subFeedIds.contains(feed.feedID) { account.removeFeed(feed) } } // Add any feeds we don't have and update any we do subscriptions.forEach { subscription in let subFeedId = String(subscription.feedID) if let feed = account.existingFeed(withFeedID: subFeedId) { feed.name = subscription.name // If the name has been changed on the server remove the locally edited name feed.editedName = nil feed.homePageURL = subscription.homePageURL feed.subscriptionID = String(subscription.subscriptionID) } else { let feed = account.createFeed(with: subscription.name, url: subscription.url, feedID: subFeedId, homePageURL: subscription.homePageURL) feed.subscriptionID = String(subscription.subscriptionID) account.addFeed(feed) } } } func syncFeedFolderRelationship(_ account: Account, _ taggings: [FeedbinTagging]?) { guard let taggings = taggings else { return } assert(Thread.isMainThread) os_log(.debug, log: log, "Syncing taggings with %ld taggings.", taggings.count) // Set up some structures to make syncing easier let folderDict: [String: Folder] = { if let folders = account.folders { return Dictionary(uniqueKeysWithValues: folders.map { ($0.name ?? "", $0) } ) } else { return [String: Folder]() } }() let taggingsDict = taggings.reduce([String: [FeedbinTagging]]()) { (dict, tagging) in var taggedFeeds = dict if var taggedFeed = taggedFeeds[tagging.name] { taggedFeed.append(tagging) taggedFeeds[tagging.name] = taggedFeed } else { taggedFeeds[tagging.name] = [tagging] } return taggedFeeds } // Sync the folders for (folderName, groupedTaggings) in taggingsDict { guard let folder = folderDict[folderName] else { return } let taggingFeedIDs = groupedTaggings.map { String($0.feedID) } // Move any feeds not in the folder to the account for feed in folder.topLevelFeeds { if !taggingFeedIDs.contains(feed.feedID) { folder.removeFeed(feed) clearFolderRelationship(for: feed, withFolderName: folder.name ?? "") account.addFeed(feed) } } // Add any feeds not in the folder let folderFeedIds = folder.topLevelFeeds.map { $0.feedID } for tagging in groupedTaggings { let taggingFeedID = String(tagging.feedID) if !folderFeedIds.contains(taggingFeedID) { guard let feed = account.existingFeed(withFeedID: taggingFeedID) else { continue } saveFolderRelationship(for: feed, withFolderName: folderName, id: String(tagging.taggingID)) folder.addFeed(feed) } } } let taggedFeedIDs = Set(taggings.map { String($0.feedID) }) // Remove all feeds from the account container that have a tag for feed in account.topLevelFeeds { if taggedFeedIDs.contains(feed.feedID) { account.removeFeed(feed) } } } func syncFavicons(_ account: Account, _ icons: [FeedbinIcon]?) { guard let icons = icons else { return } os_log(.debug, log: log, "Syncing favicons with %ld icons.", icons.count) let iconDict = Dictionary(uniqueKeysWithValues: icons.map { ($0.host, $0.url) } ) for feed in account.flattenedFeeds() { for (key, value) in iconDict { if feed.homePageURL?.contains(key) ?? false { feed.faviconURL = value break } } } } func sendArticleStatuses(_ statuses: [SyncStatus], apiCall: ([Int], @escaping (Result) -> Void) -> Void, completion: @escaping (() -> Void)) { guard !statuses.isEmpty else { completion() return } let group = DispatchGroup() let articleIDs = statuses.compactMap { Int($0.articleID) } let articleIDGroups = articleIDs.chunked(into: 1000) for articleIDGroup in articleIDGroups { group.enter() apiCall(articleIDGroup) { result in switch result { case .success: self.database.deleteSelectedForProcessing(articleIDGroup.map { String($0) } ) group.leave() case .failure(let error): os_log(.error, log: self.log, "Article status sync call failed: %@.", error.localizedDescription) self.database.resetSelectedForProcessing(articleIDGroup.map { String($0) } ) group.leave() } } } group.notify(queue: DispatchQueue.main) { completion() } } func renameFolderRelationship(for account: Account, fromName: String, toName: String) { for feed in account.flattenedFeeds() { if var folderRelationship = feed.folderRelationship { let relationship = folderRelationship[fromName] folderRelationship[fromName] = nil folderRelationship[toName] = relationship feed.folderRelationship = folderRelationship } } } func clearFolderRelationship(for feed: Feed, withFolderName folderName: String) { if var folderRelationship = feed.folderRelationship { folderRelationship[folderName] = nil feed.folderRelationship = folderRelationship } } func saveFolderRelationship(for feed: Feed, withFolderName folderName: String, id: String) { if var folderRelationship = feed.folderRelationship { folderRelationship[folderName] = id feed.folderRelationship = folderRelationship } else { feed.folderRelationship = [folderName: id] } } func decideBestFeedChoice(account: Account, url: String, name: String?, container: Container, choices: [FeedbinSubscriptionChoice], completion: @escaping (Result) -> Void) { let feedSpecifiers: [FeedSpecifier] = choices.map { choice in let source = url == choice.url ? FeedSpecifier.Source.UserEntered : FeedSpecifier.Source.HTMLLink let specifier = FeedSpecifier(title: choice.name, urlString: choice.url, source: source) return specifier } if let bestSpecifier = FeedSpecifier.bestFeed(in: Set(feedSpecifiers)) { if let bestSubscription = choices.filter({ bestSpecifier.urlString == $0.url }).first { createFeed(for: account, url: bestSubscription.url, name: name, container: container, completion: completion) } else { DispatchQueue.main.async { completion(.failure(FeedbinAccountDelegateError.invalidParameter)) } } } else { DispatchQueue.main.async { completion(.failure(FeedbinAccountDelegateError.invalidParameter)) } } } func createFeed( account: Account, subscription sub: FeedbinSubscription, name: String?, container: Container, completion: @escaping (Result) -> Void) { DispatchQueue.main.async { let feed = account.createFeed(with: sub.name, url: sub.url, feedID: String(sub.feedID), homePageURL: sub.homePageURL) feed.subscriptionID = String(sub.subscriptionID) account.addFeed(feed, to: container) { result in switch result { case .success: if let name = name { account.renameFeed(feed, to: name) { result in switch result { case .success: self.initialFeedDownload(account: account, feed: feed, completion: completion) case .failure(let error): completion(.failure(error)) } } } else { self.initialFeedDownload(account: account, feed: feed, completion: completion) } case .failure(let error): completion(.failure(error)) } } } } func initialFeedDownload( account: Account, feed: Feed, completion: @escaping (Result) -> Void) { // refreshArticles is being reused and will clear one of the tasks for us refreshProgress.addToNumberOfTasksAndRemaining(4) // Download the initial articles self.caller.retrieveEntries(feedID: feed.feedID) { result in self.refreshProgress.completeTask() switch result { case .success(let (entries, page)): self.processEntries(account: account, entries: entries) { self.refreshArticleStatus(for: account) { self.refreshArticles(account, page: page) { self.refreshProgress.completeTask() self.refreshMissingArticles(account) { self.refreshProgress.completeTask() DispatchQueue.main.async { completion(.success(feed)) } } } } } case .failure(let error): completion(.failure(error)) } } } func refreshArticles(_ account: Account, completion: @escaping (() -> Void)) { os_log(.debug, log: log, "Refreshing articles...") caller.retrieveEntries() { result in switch result { case .success(let (entries, page, lastPageNumber)): if let last = lastPageNumber { self.refreshProgress.addToNumberOfTasksAndRemaining(last - 1) } self.processEntries(account: account, entries: entries) { self.refreshProgress.completeTask() self.refreshArticles(account, page: page) { os_log(.debug, log: self.log, "Done refreshing articles.") completion() } } case .failure(let error): os_log(.error, log: self.log, "Refresh articles failed: %@.", error.localizedDescription) completion() } } } func refreshMissingArticles(_ account: Account, completion: @escaping (() -> Void)) { os_log(.debug, log: log, "Refreshing missing articles...") let group = DispatchGroup() let fetchedArticleIDs = account.fetchArticleIDsForStatusesWithoutArticles() let articleIDs = Array(fetchedArticleIDs) let chunkedArticleIDs = articleIDs.chunked(into: 100) for chunk in chunkedArticleIDs { group.enter() self.caller.retrieveEntries(articleIDs: chunk) { result in switch result { case .success(let entries): self.processEntries(account: account, entries: entries) { group.leave() } case .failure(let error): os_log(.error, log: self.log, "Refresh missing articles failed: %@.", error.localizedDescription) group.leave() } } } group.notify(queue: DispatchQueue.main) { self.refreshProgress.completeTask() os_log(.debug, log: self.log, "Done refreshing missing articles.") completion() } } func refreshArticles(_ account: Account, page: String?, completion: @escaping (() -> Void)) { guard let page = page else { completion() return } caller.retrieveEntries(page: page) { result in switch result { case .success(let (entries, nextPage)): self.processEntries(account: account, entries: entries) { self.refreshProgress.completeTask() self.refreshArticles(account, page: nextPage, completion: completion) } case .failure(let error): os_log(.error, log: self.log, "Refresh articles for additional pages failed: %@.", error.localizedDescription) completion() } } } func processEntries(account: Account, entries: [FeedbinEntry]?, completion: @escaping (() -> Void)) { let parsedItems = mapEntriesToParsedItems(entries: entries) let parsedMap = Dictionary(grouping: parsedItems, by: { item in item.feedURL } ) let group = DispatchGroup() for (feedID, mapItems) in parsedMap { group.enter() if let feed = account.existingFeed(withFeedID: feedID) { DispatchQueue.main.async { account.update(feed, parsedItems: Set(mapItems), defaultRead: true) { group.leave() } } } else { group.leave() } } group.notify(queue: DispatchQueue.main) { completion() } } func mapEntriesToParsedItems(entries: [FeedbinEntry]?) -> Set { guard let entries = entries else { return Set() } let parsedItems: [ParsedItem] = entries.map { entry in let authors = Set([ParsedAuthor(name: entry.authorName, url: entry.jsonFeed?.jsonFeedAuthor?.url, avatarURL: entry.jsonFeed?.jsonFeedAuthor?.avatarURL, emailAddress: nil)]) return ParsedItem(syncServiceID: String(entry.articleID), uniqueID: String(entry.articleID), feedURL: String(entry.feedID), url: nil, externalURL: entry.url, title: entry.title, contentHTML: entry.contentHTML, contentText: nil, summary: entry.summary, imageURL: nil, bannerImageURL: nil, datePublished: entry.parseDatePublished(), dateModified: nil, authors: authors, tags: nil, attachments: nil) } return Set(parsedItems) } func syncArticleReadState(account: Account, articleIDs: [Int]?) { guard let articleIDs = articleIDs else { return } let feedbinUnreadArticleIDs = Set(articleIDs.map { String($0) } ) let currentUnreadArticleIDs = account.fetchUnreadArticleIDs() // Mark articles as unread let deltaUnreadArticleIDs = feedbinUnreadArticleIDs.subtracting(currentUnreadArticleIDs) let markUnreadArticles = account.fetchArticles(.articleIDs(deltaUnreadArticleIDs)) account.update(markUnreadArticles, statusKey: .read, flag: false) // Save any unread statuses for articles we haven't yet received let markUnreadArticleIDs = Set(markUnreadArticles.map { $0.articleID }) let missingUnreadArticleIDs = deltaUnreadArticleIDs.subtracting(markUnreadArticleIDs) account.ensureStatuses(missingUnreadArticleIDs, true, .read, false) // Mark articles as read let deltaReadArticleIDs = currentUnreadArticleIDs.subtracting(feedbinUnreadArticleIDs) let markReadArticles = account.fetchArticles(.articleIDs(deltaReadArticleIDs)) account.update(markReadArticles, statusKey: .read, flag: true) // Save any read statuses for articles we haven't yet received let markReadArticleIDs = Set(markReadArticles.map { $0.articleID }) let missingReadArticleIDs = deltaReadArticleIDs.subtracting(markReadArticleIDs) account.ensureStatuses(missingReadArticleIDs, true, .read, true) } func syncArticleStarredState(account: Account, articleIDs: [Int]?) { guard let articleIDs = articleIDs else { return } let feedbinStarredArticleIDs = Set(articleIDs.map { String($0) } ) let currentStarredArticleIDs = account.fetchStarredArticleIDs() // Mark articles as starred let deltaStarredArticleIDs = feedbinStarredArticleIDs.subtracting(currentStarredArticleIDs) let markStarredArticles = account.fetchArticles(.articleIDs(deltaStarredArticleIDs)) account.update(markStarredArticles, statusKey: .starred, flag: true) // Save any starred statuses for articles we haven't yet received let markStarredArticleIDs = Set(markStarredArticles.map { $0.articleID }) let missingStarredArticleIDs = deltaStarredArticleIDs.subtracting(markStarredArticleIDs) account.ensureStatuses(missingStarredArticleIDs, true, .starred, true) // Mark articles as unstarred let deltaUnstarredArticleIDs = currentStarredArticleIDs.subtracting(feedbinStarredArticleIDs) let markUnstarredArticles = account.fetchArticles(.articleIDs(deltaUnstarredArticleIDs)) account.update(markUnstarredArticles, statusKey: .starred, flag: false) // Save any unstarred statuses for articles we haven't yet received let markUnstarredArticleIDs = Set(markUnstarredArticles.map { $0.articleID }) let missingUnstarredArticleIDs = deltaUnstarredArticleIDs.subtracting(markUnstarredArticleIDs) account.ensureStatuses(missingUnstarredArticleIDs, true, .starred, false) } func deleteTagging(for account: Account, with feed: Feed, from container: Container?, completion: @escaping (Result) -> Void) { if let folder = container as? Folder, let feedTaggingID = feed.folderRelationship?[folder.name ?? ""] { refreshProgress.addToNumberOfTasksAndRemaining(1) caller.deleteTagging(taggingID: feedTaggingID) { result in self.refreshProgress.completeTask() switch result { case .success: DispatchQueue.main.async { self.clearFolderRelationship(for: feed, withFolderName: folder.name ?? "") folder.removeFeed(feed) account.addFeedIfNotInAnyFolder(feed) completion(.success(())) } case .failure(let error): DispatchQueue.main.async { let wrappedError = AccountError.wrappedError(error: error, account: account) completion(.failure(wrappedError)) } } } } else { if let account = container as? Account { account.removeFeed(feed) } completion(.success(())) } } func deleteSubscription(for account: Account, with feed: Feed, from container: Container?, completion: @escaping (Result) -> Void) { // This error should never happen guard let subscriptionID = feed.subscriptionID else { completion(.failure(FeedbinAccountDelegateError.invalidParameter)) return } refreshProgress.addToNumberOfTasksAndRemaining(1) caller.deleteSubscription(subscriptionID: subscriptionID) { result in self.refreshProgress.completeTask() switch result { case .success: DispatchQueue.main.async { account.clearFeedMetadata(feed) account.removeFeed(feed) if let folders = account.folders { for folder in folders { folder.removeFeed(feed) } } completion(.success(())) } case .failure(let error): DispatchQueue.main.async { let wrappedError = AccountError.wrappedError(error: error, account: account) completion(.failure(wrappedError)) } } } } func retrieveCredentialsIfNecessary(_ account: Account) { if credentials == nil { credentials = try? account.retrieveCredentials(type: .basic) } } }