NetNewsWire/Frameworks/Account/Feedly/FeedlyAccountDelegate.swift

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//
// FeedlyAccountDelegate.swift
// Account
//
// Created by Kiel Gillard on 3/9/19.
// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
//
import Articles
import RSCore
import RSParser
import RSWeb
import SyncDatabase
import os.log
final class FeedlyAccountDelegate: AccountDelegate {
/// Feedly has a sandbox API and a production API.
/// This property is referred to when clients need to know which environment it should be pointing to.
/// The value of this proptery must match any `OAuthAuthorizationClient` used.
/// Currently this is always returning the cloud API, but we are leaving it stubbed out for now.
static var environment: FeedlyAPICaller.API {
return .cloud
}
// TODO: Kiel, if you decide not to support OPML import you will have to disallow it in the behaviors
// See https://developer.feedly.com/v3/opml/
var behaviors: AccountBehaviors = [.disallowFeedInRootFolder, .disallowMarkAsUnreadAfterPeriod(31)]
let isOPMLImportSupported = false
var isOPMLImportInProgress = false
var server: String? {
return caller.server
}
var credentials: Credentials? {
didSet {
// https://developer.feedly.com/v3/developer/
if let devToken = ProcessInfo.processInfo.environment["FEEDLY_DEV_ACCESS_TOKEN"], !devToken.isEmpty {
caller.credentials = Credentials(type: .oauthAccessToken, username: "Developer", secret: devToken)
} else {
caller.credentials = credentials
}
}
}
let oauthAuthorizationClient: OAuthAuthorizationClient
var accountMetadata: AccountMetadata?
var refreshProgress = DownloadProgress(numberOfTasks: 0)
internal let caller: FeedlyAPICaller
private let log = OSLog(subsystem: Bundle.main.bundleIdentifier!, category: "Feedly")
private let database: SyncDatabase
private weak var currentSyncAllOperation: MainThreadOperation?
private let operationQueue = MainThreadOperationQueue()
init(dataFolder: String, transport: Transport?, api: FeedlyAPICaller.API) {
// Many operations have their own operation queues, such as the sync all operation.
// Making this a serial queue at this higher level of abstraction means we can ensure,
// for example, a `FeedlyRefreshAccessTokenOperation` occurs before a `FeedlySyncAllOperation`,
// improving our ability to debug, reason about and predict the behaviour of the code.
if let transport = transport {
self.caller = FeedlyAPICaller(transport: transport, api: api)
} 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)
self.caller = FeedlyAPICaller(transport: session, api: api)
}
let databaseFilePath = (dataFolder as NSString).appendingPathComponent("Sync.sqlite3")
self.database = SyncDatabase(databaseFilePath: databaseFilePath)
self.oauthAuthorizationClient = api.oauthAuthorizationClient
}
// MARK: Account API
func refreshAll(for account: Account, completion: @escaping (Result<Void, Error>) -> Void) {
assert(Thread.isMainThread)
guard currentSyncAllOperation == nil else {
os_log(.debug, log: log, "Ignoring refreshAll: Feedly sync already in progress.")
completion(.success(()))
return
}
guard let credentials = credentials else {
os_log(.debug, log: log, "Ignoring refreshAll: Feedly account has no credentials.")
completion(.failure(FeedlyAccountDelegateError.notLoggedIn))
return
}
let log = self.log
let operation = FeedlySyncAllOperation(account: account, credentials: credentials, caller: caller, database: database, lastSuccessfulFetchStartDate: accountMetadata?.lastArticleFetchStartTime, downloadProgress: refreshProgress, log: log)
operation.downloadProgress = refreshProgress
let date = Date()
operation.syncCompletionHandler = { [weak self] result in
if case .success = result {
self?.accountMetadata?.lastArticleFetchStartTime = date
self?.accountMetadata?.lastArticleFetchEndTime = Date()
}
os_log(.debug, log: log, "Sync took %{public}.3f seconds", -date.timeIntervalSinceNow)
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completion(result)
}
currentSyncAllOperation = operation
operationQueue.add(operation)
}
func sendArticleStatus(for account: Account, completion: @escaping ((Result<Void, Error>) -> Void)) {
// Ensure remote articles have the same status as they do locally.
let send = FeedlySendArticleStatusesOperation(database: database, service: caller, log: log)
send.completionBlock = { operation in
// TODO: not call with success if operation was canceled? Not sure.
DispatchQueue.main.async {
completion(.success(()))
}
}
operationQueue.add(send)
}
/// Attempts to ensure local articles have the same status as they do remotely.
/// So if the user is using another client roughly simultaneously with this app,
/// this app does its part to ensure the articles have a consistent status between both.
///
/// - Parameter account: The account whose articles have a remote status.
/// - Parameter completion: Call on the main queue.
func refreshArticleStatus(for account: Account, completion: @escaping ((Result<Void, Error>) -> Void)) {
guard let credentials = credentials else {
return completion(.success(()))
}
let group = DispatchGroup()
let ingestUnread = FeedlyIngestUnreadArticleIdsOperation(account: account, credentials: credentials, service: caller, database: database, newerThan: nil, log: log)
group.enter()
ingestUnread.completionBlock = { _ in
group.leave()
}
let ingestStarred = FeedlyIngestStarredArticleIdsOperation(account: account, credentials: credentials, service: caller, database: database, newerThan: nil, log: log)
group.enter()
ingestStarred.completionBlock = { _ in
group.leave()
}
group.notify(queue: .main) {
completion(.success(()))
}
operationQueue.addOperations([ingestUnread, ingestStarred])
}
func importOPML(for account: Account, opmlFile: URL, completion: @escaping (Result<Void, Error>) -> Void) {
let data: Data
do {
data = try Data(contentsOf: opmlFile)
} catch {
completion(.failure(error))
return
}
os_log(.debug, log: log, "Begin importing OPML...")
isOPMLImportInProgress = true
refreshProgress.addToNumberOfTasksAndRemaining(1)
caller.importOpml(data) { result in
switch result {
case .success:
os_log(.debug, log: self.log, "Import OPML done.")
self.refreshProgress.completeTask()
self.isOPMLImportInProgress = false
DispatchQueue.main.async {
completion(.success(()))
}
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) {
let progress = refreshProgress
progress.addToNumberOfTasksAndRemaining(1)
caller.createCollection(named: name) { result in
progress.completeTask()
switch result {
case .success(let collection):
if let folder = account.ensureFolder(with: collection.label) {
folder.externalID = collection.id
completion(.success(folder))
} else {
// Is the name empty? Or one of the global resource names?
completion(.failure(FeedlyAccountDelegateError.unableToAddFolder(name)))
}
case .failure(let error):
completion(.failure(error))
}
}
}
func renameFolder(for account: Account, with folder: Folder, to name: String, completion: @escaping (Result<Void, Error>) -> Void) {
guard let id = folder.externalID else {
return DispatchQueue.main.async {
completion(.failure(FeedlyAccountDelegateError.unableToRenameFolder(folder.nameForDisplay, name)))
}
}
let nameBefore = folder.name
caller.renameCollection(with: id, to: name) { result in
switch result {
case .success(let collection):
folder.name = collection.label
completion(.success(()))
case .failure(let error):
folder.name = nameBefore
completion(.failure(error))
}
}
folder.name = name
}
func removeFolder(for account: Account, with folder: Folder, completion: @escaping (Result<Void, Error>) -> Void) {
guard let id = folder.externalID else {
return DispatchQueue.main.async {
completion(.failure(FeedlyAccountDelegateError.unableToRemoveFolder(folder.nameForDisplay)))
}
}
let progress = refreshProgress
progress.addToNumberOfTasksAndRemaining(1)
caller.deleteCollection(with: id) { result in
progress.completeTask()
switch result {
case .success:
account.removeFolder(folder)
completion(.success(()))
case .failure(let error):
completion(.failure(error))
}
}
}
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func createWebFeed(for account: Account, url: String, name: String?, container: Container, completion: @escaping (Result<WebFeed, Error>) -> Void) {
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do {
guard let credentials = credentials else {
throw FeedlyAccountDelegateError.notLoggedIn
}
let addNewFeed = try FeedlyAddNewFeedOperation(account: account,
credentials: credentials,
url: url,
feedName: name,
searchService: caller,
addToCollectionService: caller,
syncUnreadIdsService: caller,
getStreamContentsService: caller,
database: database,
container: container,
progress: refreshProgress,
log: log)
addNewFeed.addCompletionHandler = { result in
completion(result)
}
operationQueue.add(addNewFeed)
} catch {
DispatchQueue.main.async {
completion(.failure(error))
}
}
}
func renameWebFeed(for account: Account, with feed: WebFeed, to name: String, completion: @escaping (Result<Void, Error>) -> Void) {
let folderCollectionIds = account.folders?.filter { $0.has(feed) }.compactMap { $0.externalID }
guard let collectionIds = folderCollectionIds, let collectionId = collectionIds.first else {
completion(.failure(FeedlyAccountDelegateError.unableToRenameFeed(feed.nameForDisplay, name)))
return
}
let feedId = FeedlyFeedResourceId(id: feed.webFeedID)
let editedNameBefore = feed.editedName
// Adding an existing feed updates it.
// Updating feed name in one folder/collection updates it for all folders/collections.
caller.addFeed(with: feedId, title: name, toCollectionWith: collectionId) { result in
switch result {
case .success:
completion(.success(()))
case .failure(let error):
feed.editedName = editedNameBefore
completion(.failure(error))
}
}
// optimistically set the name
feed.editedName = name
}
func addWebFeed(for account: Account, with feed: WebFeed, to container: Container, completion: @escaping (Result<Void, Error>) -> Void) {
do {
guard let credentials = credentials else {
throw FeedlyAccountDelegateError.notLoggedIn
}
let resource = FeedlyFeedResourceId(id: feed.webFeedID)
let addExistingFeed = try FeedlyAddExistingFeedOperation(account: account,
credentials: credentials,
resource: resource,
service: caller,
container: container,
progress: refreshProgress,
log: log)
addExistingFeed.addCompletionHandler = { result in
completion(result)
}
operationQueue.add(addExistingFeed)
} catch {
DispatchQueue.main.async {
completion(.failure(error))
}
}
}
func removeWebFeed(for account: Account, with feed: WebFeed, from container: Container, completion: @escaping (Result<Void, Error>) -> Void) {
guard let folder = container as? Folder, let collectionId = folder.externalID else {
return DispatchQueue.main.async {
completion(.failure(FeedlyAccountDelegateError.unableToRemoveFeed(feed)))
}
}
caller.removeFeed(feed.webFeedID, fromCollectionWith: collectionId) { result in
switch result {
case .success:
completion(.success(()))
case .failure(let error):
folder.addWebFeed(feed)
completion(.failure(error))
}
}
folder.removeWebFeed(feed)
}
func moveWebFeed(for account: Account, with feed: WebFeed, from: Container, to: Container, completion: @escaping (Result<Void, Error>) -> Void) {
guard let from = from as? Folder, let to = to as? Folder else {
return DispatchQueue.main.async {
completion(.failure(FeedlyAccountDelegateError.addFeedChooseFolder))
}
}
addWebFeed(for: account, with: feed, to: to) { [weak self] addResult in
switch addResult {
// now that we have added the feed, remove it from the other collection
case .success:
self?.removeWebFeed(for: account, with: feed, from: from) { removeResult in
switch removeResult {
case .success:
completion(.success(()))
case .failure:
from.addWebFeed(feed)
completion(.failure(FeedlyAccountDelegateError.unableToMoveFeedBetweenFolders(feed, from, to)))
}
}
case .failure(let error):
from.addWebFeed(feed)
to.removeWebFeed(feed)
completion(.failure(error))
}
}
// optimistically move the feed, undoing as appropriate to the failure
from.removeWebFeed(feed)
to.addWebFeed(feed)
}
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: .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)
os_log(.debug, log: log, "Marking %@ as %@.", articles.map { $0.title }, syncStatuses)
database.selectPendingCount { result in
if let count = try? result.get(), count > 100 {
self.sendArticleStatus(for: account) { _ in }
}
}
return try? account.update(articles, statusKey: statusKey, flag: flag)
}
func accountDidInitialize(_ account: Account) {
credentials = try? account.retrieveCredentials(type: .oauthAccessToken)
let refreshAccessToken = FeedlyRefreshAccessTokenOperation(account: account, service: self, oauthClient: oauthAuthorizationClient, log: log)
operationQueue.add(refreshAccessToken)
}
func accountWillBeDeleted(_ account: Account) {
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let logout = FeedlyLogoutOperation(account: account, service: caller, log: log)
// Dispatch on the shared queue because the lifetime of the account delegate is uncertain.
MainThreadOperationQueue.shared.add(logout)
}
static func validateCredentials(transport: Transport, credentials: Credentials, endpoint: URL?, completion: @escaping (Result<Credentials?, Error>) -> Void) {
assertionFailure("An `account` instance should enqueue an \(FeedlyRefreshAccessTokenOperation.self) instead.")
completion(.success(credentials))
}
// MARK: Suspend and Resume (for iOS)
/// Suspend all network activity
func suspendNetwork() {
caller.suspend()
operationQueue.cancelAllOperations()
}
/// 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()
caller.resume()
}
}