NetNewsWire/Frameworks/Account/FeedWrangler/FeedWranglerAccountDelegate...

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//
// FeedWranglerAccountDelegate.swift
// Account
//
// Created by Jonathan Bennett on 2019-08-29.
// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
//
import Articles
import RSCore
import RSParser
import RSWeb
import SyncDatabase
import os.log
final class FeedWranglerAccountDelegate: AccountDelegate {
var behaviors: AccountBehaviors = []
var isOPMLImportInProgress = false
var server: String? = FeedWranglerConfig.clientPath
var credentials: Credentials? {
didSet {
caller.credentials = credentials
}
}
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var accountMetadata: AccountMetadata?
var refreshProgress = DownloadProgress(numberOfTasks: 0)
private let caller: FeedWranglerAPICaller
private let log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "Feed Wrangler")
private let database: SyncDatabase
init(dataFolder: String, transport: Transport?) {
if let transport = transport {
caller = FeedWranglerAPICaller(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
}
let session = URLSession(configuration: sessionConfiguration)
caller = FeedWranglerAPICaller(transport: session)
}
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database = SyncDatabase(databaseFilePath: dataFolder.appending("/DB.sqlite3"))
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}
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func accountWillBeDeleted(_ account: Account) {
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caller.logout() { _ in }
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}
func receiveRemoteNotification(for account: Account, userInfo: [AnyHashable : Any], completion: @escaping () -> Void) {
completion()
}
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func refreshAll(for account: Account, completion: @escaping (Result<Void, Error>) -> Void) {
refreshProgress.addToNumberOfTasksAndRemaining(6)
self.refreshCredentials(for: account) {
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self.refreshProgress.completeTask()
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self.refreshSubscriptions(for: account) { result in
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self.refreshProgress.completeTask()
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switch result {
case .success:
self.sendArticleStatus(for: account) { result in
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self.refreshProgress.completeTask()
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switch result {
case .success:
self.refreshArticleStatus(for: account) { result in
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self.refreshProgress.completeTask()
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switch result {
case .success:
self.refreshArticles(for: account) { result in
self.refreshProgress.completeTask()
switch result {
case .success:
self.refreshMissingArticles(for: account) { result in
self.refreshProgress.completeTask()
switch result {
case .success:
DispatchQueue.main.async {
completion(.success(()))
}
case .failure(let error):
completion(.failure(error))
}
}
case .failure(let error):
completion(.failure(error))
}
}
case .failure(let error):
completion(.failure(error))
}
}
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case .failure(let error):
completion(.failure(error))
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}
}
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case .failure(let error):
completion(.failure(error))
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}
}
}
}
func refreshCredentials(for account: Account, completion: @escaping (() -> Void)) {
os_log(.debug, log: log, "Refreshing credentials...")
// MARK: TODO
credentials = try? account.retrieveCredentials(type: .feedWranglerToken)
completion()
}
func refreshSubscriptions(for account: Account, completion: @escaping ((Result<Void, Error>) -> Void)) {
os_log(.debug, log: log, "Refreshing subscriptions...")
caller.retrieveSubscriptions { result in
switch result {
case .success(let subscriptions):
self.syncFeeds(account, subscriptions)
completion(.success(()))
case .failure(let error):
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os_log(.debug, log: self.log, "Failed to refresh subscriptions: %@", error.localizedDescription)
completion(.failure(error))
}
}
}
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func refreshArticles(for account: Account, page: Int = 0, completion: @escaping ((Result<Void, Error>) -> Void)) {
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os_log(.debug, log: log, "Refreshing articles, page: %d...", page)
caller.retrieveFeedItems(page: page) { result in
switch result {
case .success(let items):
self.syncFeedItems(account, items) {
if items.count == 0 {
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completion(.success(()))
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} else {
self.refreshArticles(for: account, page: (page + 1), completion: completion)
}
}
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case .failure(let error):
completion(.failure(error))
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}
}
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}
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func refreshMissingArticles(for account: Account, completion: @escaping ((Result<Void, Error>)-> Void)) {
account.fetchArticleIDsForStatusesWithoutArticlesNewerThanCutoffDate { articleIDsResult in
func process(_ fetchedArticleIDs: Set<String>) {
os_log(.debug, log: self.log, "Refreshing missing articles...")
let group = DispatchGroup()
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.syncFeedItems(account, entries) {
group.leave()
}
case .failure(let error):
os_log(.error, log: self.log, "Refresh missing articles failed: %@", error.localizedDescription)
group.leave()
}
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}
}
group.notify(queue: DispatchQueue.main) {
self.refreshProgress.completeTask()
os_log(.debug, log: self.log, "Done refreshing missing articles.")
completion(.success(()))
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}
}
switch articleIDsResult {
case .success(let articleIDs):
process(articleIDs)
case .failure(let databaseError):
self.refreshProgress.completeTask()
completion(.failure(databaseError))
}
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}
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}
func sendArticleStatus(for account: Account, completion: @escaping VoidResultCompletionBlock) {
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os_log(.debug, log: log, "Sending article status...")
database.selectForProcessing { result in
func processStatuses(_ syncStatuses: [SyncStatus]) {
let articleStatuses = Dictionary(grouping: syncStatuses, by: { $0.articleID })
let group = DispatchGroup()
articleStatuses.forEach { articleID, statuses in
group.enter()
self.caller.updateArticleStatus(articleID, statuses) {
group.leave()
}
}
group.notify(queue: DispatchQueue.main) {
os_log(.debug, log: self.log, "Done sending article statuses.")
completion(.success(()))
}
}
switch result {
case .success(let syncStatuses):
processStatuses(syncStatuses)
case .failure(let databaseError):
completion(.failure(databaseError))
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}
}
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}
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func refreshArticleStatus(for account: Account, completion: @escaping ((Result<Void, Error>) -> Void)) {
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os_log(.debug, log: log, "Refreshing article status...")
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let group = DispatchGroup()
group.enter()
caller.retrieveAllUnreadFeedItems { result in
switch result {
case .success(let items):
self.syncArticleReadState(account, items)
group.leave()
case .failure(let error):
os_log(.info, log: self.log, "Retrieving unread entries failed: %@.", error.localizedDescription)
group.leave()
}
}
// starred
group.enter()
caller.retrieveAllStarredFeedItems { result in
switch result {
case .success(let items):
self.syncArticleStarredState(account, items)
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.")
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completion(.success(()))
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}
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}
func importOPML(for account: Account, opmlFile: URL, completion: @escaping (Result<Void, Error>) -> Void) {
fatalError()
}
func createFolder(for account: Account, name: String, completion: @escaping (Result<Folder, Error>) -> Void) {
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fatalError()
}
func renameFolder(for account: Account, with folder: Folder, to name: String, completion: @escaping (Result<Void, Error>) -> Void) {
fatalError()
}
func removeFolder(for account: Account, with folder: Folder, completion: @escaping (Result<Void, Error>) -> Void) {
fatalError()
}
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func createWebFeed(for account: Account, url: String, name: String?, container: Container, completion: @escaping (Result<WebFeed, Error>) -> Void) {
refreshProgress.addToNumberOfTasksAndRemaining(2)
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self.refreshCredentials(for: account) {
self.refreshProgress.completeTask()
self.caller.addSubscription(url: url) { result in
self.refreshProgress.completeTask()
switch result {
case .success(let subscription):
self.addFeedWranglerSubscription(account: account, subscription: subscription, name: name, container: container, completion: completion)
case .failure(let error):
DispatchQueue.main.async {
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completion(.failure(error))
}
}
}
}
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}
private func addFeedWranglerSubscription(account: Account, subscription sub: FeedWranglerSubscription, name: String?, container: Container, completion: @escaping (Result<WebFeed, Error>) -> Void) {
DispatchQueue.main.async {
let feed = account.createWebFeed(with: sub.title, url: sub.feedURL, webFeedID: String(sub.feedID), homePageURL: sub.siteURL)
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))
}
}
}
}
private func initialFeedDownload(account: Account, feed: WebFeed, completion: @escaping (Result<WebFeed, Error>) -> Void) {
self.caller.retrieveFeedItems(page: 0, feed: feed) { results in
switch results {
case .success(let entries):
self.syncFeedItems(account, entries) {
DispatchQueue.main.async {
completion(.success(feed))
}
}
case .failure(let error):
DispatchQueue.main.async {
completion(.failure(error))
}
}
}
}
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func renameWebFeed(for account: Account, with feed: WebFeed, to name: String, completion: @escaping (Result<Void, Error>) -> Void) {
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refreshProgress.addToNumberOfTasksAndRemaining(2)
self.refreshCredentials(for: account) {
self.refreshProgress.completeTask()
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self.caller.renameSubscription(feedID: feed.webFeedID, newName: name) { result in
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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))
}
}
}
}
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}
func addWebFeed(for account: Account, with feed: WebFeed, to container: Container, completion: @escaping (Result<Void, Error>) -> Void) {
// just add to account, folders are not supported
DispatchQueue.main.async {
account.addFeedIfNotInAnyFolder(feed)
completion(.success(()))
}
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}
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func removeWebFeed(for account: Account, with feed: WebFeed, from container: Container, completion: @escaping (Result<Void, Error>) -> Void) {
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refreshProgress.addToNumberOfTasksAndRemaining(2)
self.refreshCredentials(for: account) {
self.refreshProgress.completeTask()
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self.caller.removeSubscription(feedID: feed.webFeedID) { result in
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self.refreshProgress.completeTask()
switch result {
case .success:
DispatchQueue.main.async {
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account.clearWebFeedMetadata(feed)
account.removeWebFeed(feed)
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completion(.success(()))
}
case .failure(let error):
DispatchQueue.main.async {
let wrappedError = AccountError.wrappedError(error: error, account: account)
completion(.failure(wrappedError))
}
}
}
}
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}
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func moveWebFeed(for account: Account, with feed: WebFeed, from: Container, to: Container, completion: @escaping (Result<Void, Error>) -> Void) {
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fatalError()
}
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func restoreWebFeed(for account: Account, feed: WebFeed, container: Container, completion: @escaping (Result<Void, Error>) -> Void) {
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fatalError()
}
func restoreFolder(for account: Account, folder: Folder, completion: @escaping (Result<Void, Error>) -> Void) {
fatalError()
}
func markArticles(for account: Account, articles: Set<Article>, statusKey: ArticleStatus.Key, flag: Bool) -> Set<Article>? {
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let syncStatuses = articles.map { SyncStatus(articleID: $0.articleID, key: statusKey, flag: flag)}
database.insertStatuses(syncStatuses)
database.selectPendingCount { result in
if let count = try? result.get(), count > 0 {
self.sendArticleStatus(for: account) { _ in }
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}
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}
return try? account.update(articles, statusKey: statusKey, flag: flag)
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}
func accountDidInitialize(_ account: Account) {
credentials = try? account.retrieveCredentials(type: .feedWranglerToken)
}
static func validateCredentials(transport: Transport, credentials: Credentials, endpoint: URL? = nil, completion: @escaping (Result<Credentials?, Error>) -> Void) {
let caller = FeedWranglerAPICaller(transport: transport)
caller.credentials = credentials
caller.validateCredentials() { result in
DispatchQueue.main.async {
completion(result)
}
}
}
// MARK: Suspend and Resume (for iOS)
/// Suspend all network activity
func suspendNetwork() {
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caller.cancelAll()
}
/// Suspend the SQLLite databases
func suspendDatabase() {
database.suspend()
}
/// Make sure no SQLite databases are open and we are ready to issue network requests.
func resume() {
database.resume()
}
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}
// MARK: Private
private extension FeedWranglerAccountDelegate {
func syncFeeds(_ account: Account, _ subscriptions: [FeedWranglerSubscription]) {
assert(Thread.isMainThread)
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let feedIds = subscriptions.map { String($0.feedID) }
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let feedsToRemove = account.topLevelWebFeeds.filter { !feedIds.contains($0.webFeedID) }
account.removeFeeds(feedsToRemove)
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var subscriptionsToAdd = Set<FeedWranglerSubscription>()
subscriptions.forEach { subscription in
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let subscriptionId = String(subscription.feedID)
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if let feed = account.existingWebFeed(withWebFeedID: subscriptionId) {
feed.name = subscription.title
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feed.editedName = nil
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feed.homePageURL = subscription.siteURL
feed.externalID = nil // MARK: TODO What should this be?
} else {
subscriptionsToAdd.insert(subscription)
}
}
subscriptionsToAdd.forEach { subscription in
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let feedId = String(subscription.feedID)
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let feed = account.createWebFeed(with: subscription.title, url: subscription.feedURL, webFeedID: feedId, homePageURL: subscription.siteURL)
feed.externalID = nil
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account.addWebFeed(feed)
}
}
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func syncFeedItems(_ account: Account, _ feedItems: [FeedWranglerFeedItem], completion: @escaping VoidCompletionBlock) {
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let parsedItems = feedItems.map { (item: FeedWranglerFeedItem) -> ParsedItem in
let itemID = String(item.feedItemID)
// let authors = ...
let parsedItem = ParsedItem(syncServiceID: itemID, uniqueID: itemID, feedURL: String(item.feedID), url: nil, externalURL: item.url, title: item.title, language: nil, contentHTML: item.body, contentText: nil, summary: nil, imageURL: nil, bannerImageURL: nil, datePublished: item.publishedDate, dateModified: item.updatedDate, authors: nil, tags: nil, attachments: nil)
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return parsedItem
}
let feedIDsAndItems = Dictionary(grouping: parsedItems, by: { $0.feedURL }).mapValues { Set($0) }
account.update(webFeedIDsAndItems: feedIDsAndItems, defaultRead: true) { _ in
completion()
}
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}
func syncArticleReadState(_ account: Account, _ unreadFeedItems: [FeedWranglerFeedItem]) {
let unreadServerItemIDs = Set(unreadFeedItems.map { String($0.feedItemID) })
account.fetchUnreadArticleIDs { articleIDsResult in
guard let unreadLocalItemIDs = try? articleIDsResult.get() else {
return
}
account.markAsUnread(unreadServerItemIDs)
let readItemIDs = unreadLocalItemIDs.subtracting(unreadServerItemIDs)
account.markAsRead(readItemIDs)
}
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}
func syncArticleStarredState(_ account: Account, _ starredFeedItems: [FeedWranglerFeedItem]) {
let starredServerItemIDs = Set(starredFeedItems.map { String($0.feedItemID) })
account.fetchStarredArticleIDs { articleIDsResult in
guard let starredLocalItemIDs = try? articleIDsResult.get() else {
return
}
account.markAsStarred(starredServerItemIDs)
let unstarredItemIDs = starredLocalItemIDs.subtracting(starredServerItemIDs)
account.markAsUnstarred(unstarredItemIDs)
}
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}
func syncArticleState(_ account: Account, key: ArticleStatus.Key, flag: Bool, serverFeedItems: [FeedWranglerFeedItem]) {
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let _ /*serverFeedItemIDs*/ = serverFeedItems.map { String($0.feedID) }
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// todo generalize this logic
}
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}