NetNewsWire/Frameworks/Account/Feedbin/FeedbinAccountDelegate.swift

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//
// 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."
case unknown = "An unknown error occurred."
}
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, Error>) -> Void) {
refreshProgress.addToNumberOfTasksAndRemaining(5)
refreshAccount(account) { result in
switch result {
case .success():
self.refreshArticlesAndStatuses(account) { result in
switch result {
case .success():
completion(.success(()))
case .failure(let error):
DispatchQueue.main.async {
self.refreshProgress.clear()
let wrappedError = AccountError.wrappedError(error: error, account: account)
completion(.failure(wrappedError))
}
}
}
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 ((Result<Void, Error>) -> Void)) {
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()
var errorOccurred = false
group.enter()
sendArticleStatuses(createUnreadStatuses, apiCall: caller.createUnreadEntries) { result in
group.leave()
if case .failure = result {
errorOccurred = true
}
}
group.enter()
sendArticleStatuses(deleteUnreadStatuses, apiCall: caller.deleteUnreadEntries) { result in
group.leave()
if case .failure = result {
errorOccurred = true
}
}
group.enter()
sendArticleStatuses(createStarredStatuses, apiCall: caller.createStarredEntries) { result in
group.leave()
if case .failure = result {
errorOccurred = true
}
}
group.enter()
sendArticleStatuses(deleteStarredStatuses, apiCall: caller.deleteStarredEntries) { result in
group.leave()
if case .failure = result {
errorOccurred = true
}
}
group.notify(queue: DispatchQueue.main) {
os_log(.debug, log: self.log, "Done sending article statuses.")
if errorOccurred {
completion(.failure(FeedbinAccountDelegateError.unknown))
} else {
completion(.success(()))
}
}
}
func refreshArticleStatus(for account: Account, completion: @escaping ((Result<Void, Error>) -> Void)) {
os_log(.debug, log: log, "Refreshing article statuses...")
let group = DispatchGroup()
var errorOccurred = false
group.enter()
caller.retrieveUnreadEntries() { result in
switch result {
case .success(let articleIDs):
self.syncArticleReadState(account: account, articleIDs: articleIDs)
group.leave()
case .failure(let error):
errorOccurred = true
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):
errorOccurred = true
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.")
if errorOccurred {
completion(.failure(FeedbinAccountDelegateError.unknown))
} else {
completion(.success(()))
}
}
}
func importOPML(for account:Account, opmlFile: URL, completion: @escaping (Result<Void, Error>) -> Void) {
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<Folder, Error>) -> Void) {
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, Error>) -> Void) {
guard folder.hasAtLeastOneWebFeed() 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, Error>) -> Void) {
// Feedbin uses tags and if at least one feed isn't tagged, then the folder doesn't exist on their system
guard folder.hasAtLeastOneWebFeed() else {
account.removeFolder(folder)
completion(.success(()))
return
}
let group = DispatchGroup()
for feed in folder.topLevelWebFeeds {
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.clearWebFeedMetadata(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 createWebFeed(for account: Account, url: String, name: String?, container: Container, completion: @escaping (Result<WebFeed, Error>) -> Void) {
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 renameWebFeed(for account: Account, with feed: WebFeed, to name: String, completion: @escaping (Result<Void, Error>) -> Void) {
// 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 removeWebFeed(for account: Account, with feed: WebFeed, from container: Container, completion: @escaping (Result<Void, Error>) -> 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 moveWebFeed(for account: Account, with feed: WebFeed, from: Container, to: Container, completion: @escaping (Result<Void, Error>) -> Void) {
if from is Account {
addWebFeed(for: account, with: feed, to: to, completion: completion)
} else {
deleteTagging(for: account, with: feed, from: from) { result in
switch result {
case .success:
self.addWebFeed(for: account, with: feed, to: to, completion: completion)
case .failure(let error):
completion(.failure(error))
}
}
}
}
func addWebFeed(for account: Account, with feed: WebFeed, to container: Container, completion: @escaping (Result<Void, Error>) -> Void) {
if let folder = container as? Folder, let webFeedID = Int(feed.webFeedID) {
refreshProgress.addToNumberOfTasksAndRemaining(1)
caller.createTagging(webFeedID: webFeedID, 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.removeWebFeed(feed)
folder.addWebFeed(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 restoreWebFeed(for account: Account, feed: WebFeed, container: Container, completion: @escaping (Result<Void, Error>) -> Void) {
if let existingFeed = account.existingWebFeed(withURL: feed.url) {
account.addWebFeed(existingFeed, to: container) { result in
switch result {
case .success:
completion(.success(()))
case .failure(let error):
completion(.failure(error))
}
}
} else {
createWebFeed(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, Error>) -> Void) {
let group = DispatchGroup()
for feed in folder.topLevelWebFeeds {
folder.topLevelWebFeeds.remove(feed)
group.enter()
restoreWebFeed(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<Article>, statusKey: ArticleStatus.Key, flag: Bool) -> Set<Article>? {
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) { _ in }
}
return account.update(articles, statusKey: statusKey, flag: flag)
}
func accountDidInitialize(_ account: Account) {
credentials = try? account.retrieveCredentials(type: .basic)
}
func accountWillBeDeleted(_ account: Account) {
}
static func validateCredentials(transport: Transport, credentials: Credentials, endpoint: URL? = nil, completion: @escaping (Result<Credentials?, Error>) -> Void) {
let caller = FeedbinAPICaller(transport: transport)
caller.credentials = credentials
caller.validateCredentials() { result in
DispatchQueue.main.async {
completion(result)
}
}
}
// MARK: Suspend and Resume (for iOS)
/// Suspend the sync database so that it can close its SQLite file.
func suspend() {
caller.suspend()
database.suspend()
}
/// Resume the sync database let it reopen its SQLite file.
func resume() {
caller.resume()
database.resume()
}
}
// MARK: Private
private extension FeedbinAccountDelegate {
func checkImportResult(opmlImportResultID: Int, completion: @escaping (Result<Void, Error>) -> 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, Error>) -> 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):
BatchUpdate.shared.perform {
self.syncFolders(account, tags)
self.syncFeeds(account, subscriptions)
self.syncFeedFolderRelationship(account, taggings)
}
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))
}
}
}
func refreshArticlesAndStatuses(_ account: Account, completion: @escaping (Result<Void, Error>) -> Void) {
self.sendArticleStatus(for: account) { result in
switch result {
case .success:
self.refreshArticleStatus(for: account) { result in
switch result {
case .success:
self.refreshArticles(account) { result in
switch result {
case .success:
self.refreshMissingArticles(account) { result in
switch result {
case .success:
DispatchQueue.main.async {
self.refreshProgress.clear()
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.topLevelWebFeeds {
account.addWebFeed(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.topLevelWebFeeds {
if !subFeedIds.contains(feed.webFeedID) {
folder.removeWebFeed(feed)
}
}
}
}
for feed in account.topLevelWebFeeds {
if !subFeedIds.contains(feed.webFeedID) {
account.removeWebFeed(feed)
}
}
// Add any feeds we don't have and update any we do
var subscriptionsToAdd = Set<FeedbinSubscription>()
subscriptions.forEach { subscription in
let subFeedId = String(subscription.feedID)
if let feed = account.existingWebFeed(withWebFeedID: 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)
feed.faviconURL = subscription.jsonFeed?.favicon
feed.iconURL = subscription.jsonFeed?.icon
}
else {
subscriptionsToAdd.insert(subscription)
}
}
// Actually add subscriptions all in one go, so we dont trigger various rebuilding things that Account does.
subscriptionsToAdd.forEach { subscription in
let feed = account.createWebFeed(with: subscription.name, url: subscription.url, webFeedID: String(subscription.feedID), homePageURL: subscription.homePageURL)
feed.subscriptionID = String(subscription.subscriptionID)
account.addWebFeed(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.topLevelWebFeeds {
if !taggingFeedIDs.contains(feed.webFeedID) {
folder.removeWebFeed(feed)
clearFolderRelationship(for: feed, withFolderName: folder.name ?? "")
account.addWebFeed(feed)
}
}
// Add any feeds not in the folder
let folderFeedIds = folder.topLevelWebFeeds.map { $0.webFeedID }
for tagging in groupedTaggings {
let taggingFeedID = String(tagging.feedID)
if !folderFeedIds.contains(taggingFeedID) {
guard let feed = account.existingWebFeed(withWebFeedID: taggingFeedID) else {
continue
}
saveFolderRelationship(for: feed, withFolderName: folderName, id: String(tagging.taggingID))
folder.addWebFeed(feed)
}
}
}
let taggedFeedIDs = Set(taggings.map { String($0.feedID) })
// Remove all feeds from the account container that have a tag
for feed in account.topLevelWebFeeds {
if taggedFeedIDs.contains(feed.webFeedID) {
account.removeWebFeed(feed)
}
}
}
func sendArticleStatuses(_ statuses: [SyncStatus],
apiCall: ([Int], @escaping (Result<Void, Error>) -> Void) -> Void,
completion: @escaping ((Result<Void, Error>) -> Void)) {
guard !statuses.isEmpty else {
completion(.success(()))
return
}
let group = DispatchGroup()
var errorOccurred = false
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):
errorOccurred = true
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) {
if errorOccurred {
completion(.failure(FeedbinAccountDelegateError.unknown))
} else {
completion(.success(()))
}
}
}
func renameFolderRelationship(for account: Account, fromName: String, toName: String) {
for feed in account.flattenedWebFeeds() {
if var folderRelationship = feed.folderRelationship {
let relationship = folderRelationship[fromName]
folderRelationship[fromName] = nil
folderRelationship[toName] = relationship
feed.folderRelationship = folderRelationship
}
}
}
func clearFolderRelationship(for feed: WebFeed, withFolderName folderName: String) {
if var folderRelationship = feed.folderRelationship {
folderRelationship[folderName] = nil
feed.folderRelationship = folderRelationship
}
}
func saveFolderRelationship(for feed: WebFeed, 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<WebFeed, Error>) -> 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 {
createWebFeed(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<WebFeed, Error>) -> Void) {
DispatchQueue.main.async {
let feed = account.createWebFeed(with: sub.name, url: sub.url, webFeedID: String(sub.feedID), homePageURL: sub.homePageURL)
feed.subscriptionID = String(sub.subscriptionID)
feed.iconURL = sub.jsonFeed?.icon
feed.faviconURL = sub.jsonFeed?.favicon
account.addWebFeed(feed, to: container) { result in
switch result {
case .success:
if let name = name {
account.renameWebFeed(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: WebFeed, completion: @escaping (Result<WebFeed, Error>) -> 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.webFeedID) { result in
self.refreshProgress.completeTask()
switch result {
case .success(let (entries, page)):
self.processEntries(account: account, entries: entries) {
self.refreshArticleStatus(for: account) { result in
switch result {
case .success:
self.refreshArticles(account, page: page, updateFetchDate: nil) { result in
switch result {
case .success:
self.refreshProgress.completeTask()
self.refreshMissingArticles(account) { result in
switch result {
case .success:
self.refreshProgress.completeTask()
DispatchQueue.main.async {
completion(.success(feed))
}
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))
}
}
}
func refreshArticles(_ account: Account, completion: @escaping ((Result<Void, Error>) -> Void)) {
os_log(.debug, log: log, "Refreshing articles...")
caller.retrieveEntries() { result in
switch result {
case .success(let (entries, page, updateFetchDate, lastPageNumber)):
if let last = lastPageNumber {
self.refreshProgress.addToNumberOfTasksAndRemaining(last - 1)
}
self.processEntries(account: account, entries: entries) {
self.refreshProgress.completeTask()
self.refreshArticles(account, page: page, updateFetchDate: updateFetchDate) { result in
os_log(.debug, log: self.log, "Done refreshing articles.")
switch result {
case .success:
completion(.success(()))
case .failure(let error):
completion(.failure(error))
}
}
}
case .failure(let error):
completion(.failure(error))
}
}
}
func refreshMissingArticles(_ account: Account, completion: @escaping ((Result<Void, Error>) -> Void)) {
os_log(.debug, log: log, "Refreshing missing articles...")
let group = DispatchGroup()
var errorOccurred = false
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):
errorOccurred = true
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.")
if errorOccurred {
completion(.failure(FeedbinAccountDelegateError.unknown))
} else {
completion(.success(()))
}
}
}
func refreshArticles(_ account: Account, page: String?, updateFetchDate: Date?, completion: @escaping ((Result<Void, Error>) -> Void)) {
guard let page = page else {
if let lastArticleFetch = updateFetchDate {
self.accountMetadata?.lastArticleFetch = lastArticleFetch
}
completion(.success(()))
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, updateFetchDate: updateFetchDate, completion: completion)
}
case .failure(let error):
completion(.failure(error))
}
}
}
func processEntries(account: Account, entries: [FeedbinEntry]?, completion: @escaping (() -> Void)) {
let parsedItems = mapEntriesToParsedItems(entries: entries)
let webFeedIDsAndItems = Dictionary(grouping: parsedItems, by: { item in item.feedURL } ).mapValues { Set($0) }
account.update(webFeedIDsAndItems: webFeedIDsAndItems, defaultRead: true, completion: completion)
}
func mapEntriesToParsedItems(entries: [FeedbinEntry]?) -> Set<ParsedItem> {
guard let entries = entries else {
return Set<ParsedItem>()
}
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.parsedDatePublished, 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: WebFeed, from container: Container?, completion: @escaping (Result<Void, Error>) -> 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.removeWebFeed(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.removeWebFeed(feed)
}
completion(.success(()))
}
}
func deleteSubscription(for account: Account, with feed: WebFeed, from container: Container?, completion: @escaping (Result<Void, Error>) -> 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.clearWebFeedMetadata(feed)
account.removeWebFeed(feed)
if let folders = account.folders {
for folder in folders {
folder.removeWebFeed(feed)
}
}
completion(.success(()))
}
case .failure(let error):
DispatchQueue.main.async {
let wrappedError = AccountError.wrappedError(error: error, account: account)
completion(.failure(wrappedError))
}
}
}
}
}