150 lines
6.3 KiB
Swift
150 lines
6.3 KiB
Swift
//
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// FeedlySyncAllOperation.swift
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// Account
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//
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// Created by Kiel Gillard on 19/9/19.
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// Copyright © 2019 Ranchero Software, LLC. All rights reserved.
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//
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import Foundation
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import os.log
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import SyncDatabase
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import RSWeb
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/// Single responsibility is to compose the operations necessary to get the entire set of articles, feeds and folders with the statuses the user expects between now and a certain date in the past.
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final class FeedlySyncAllOperation: FeedlyOperation {
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private let operationQueue: OperationQueue
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private let log: OSLog
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let syncUUID: UUID
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var syncCompletionHandler: ((Result<Void, Error>) -> ())?
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init(account: Account, credentials: Credentials, lastSuccessfulFetchStartDate: Date?, markArticlesService: FeedlyMarkArticlesService, getUnreadService: FeedlyGetStreamIdsService, getCollectionsService: FeedlyGetCollectionsService, getStreamContentsService: FeedlyGetStreamContentsService, getStarredArticlesService: FeedlyGetStreamContentsService, database: SyncDatabase, downloadProgress: DownloadProgress, log: OSLog) {
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self.syncUUID = UUID()
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self.log = log
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self.operationQueue = OperationQueue()
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self.operationQueue.isSuspended = true
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super.init()
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self.downloadProgress = downloadProgress
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// Send any read/unread/starred article statuses to Feedly before anything else.
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let sendArticleStatuses = FeedlySendArticleStatusesOperation(database: database, service: markArticlesService, log: log)
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sendArticleStatuses.delegate = self
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sendArticleStatuses.downloadProgress = downloadProgress
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self.operationQueue.addOperation(sendArticleStatuses)
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// Get each page of unread article ids in the global.all stream for the last 31 days (nil = Feedly API default).
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let getUnread = FeedlySyncUnreadStatusesOperation(account: account, credentials: credentials, service: getUnreadService, newerThan: nil, log: log)
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getUnread.delegate = self
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getUnread.addDependency(sendArticleStatuses)
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getUnread.downloadProgress = downloadProgress
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self.operationQueue.addOperation(getUnread)
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// Get all the Collections the user has.
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let getCollections = FeedlyGetCollectionsOperation(service: getCollectionsService, log: log)
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getCollections.delegate = self
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getCollections.downloadProgress = downloadProgress
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getCollections.addDependency(sendArticleStatuses)
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self.operationQueue.addOperation(getCollections)
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// Ensure a folder exists for each Collection, removing Folders without a corresponding Collection.
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let mirrorCollectionsAsFolders = FeedlyMirrorCollectionsAsFoldersOperation(account: account, collectionsProvider: getCollections, log: log)
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mirrorCollectionsAsFolders.delegate = self
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mirrorCollectionsAsFolders.addDependency(getCollections)
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self.operationQueue.addOperation(mirrorCollectionsAsFolders)
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// Ensure feeds are created and grouped by their folders.
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let createFeedsOperation = FeedlyCreateFeedsForCollectionFoldersOperation(account: account, feedsAndFoldersProvider: mirrorCollectionsAsFolders, log: log)
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createFeedsOperation.delegate = self
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createFeedsOperation.addDependency(mirrorCollectionsAsFolders)
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self.operationQueue.addOperation(createFeedsOperation)
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// Get each page of the global.all stream until we get either the content from the last sync or the last 31 days.
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let getStreamContents = FeedlySyncStreamContentsOperation(account: account, credentials: credentials, service: getStreamContentsService, newerThan: lastSuccessfulFetchStartDate, log: log)
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getStreamContents.delegate = self
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getStreamContents.downloadProgress = downloadProgress
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getStreamContents.addDependency(getCollections)
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getStreamContents.addDependency(getUnread)
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getStreamContents.addDependency(createFeedsOperation)
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self.operationQueue.addOperation(getStreamContents)
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// Get each and every starred article.
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let syncStarred = FeedlySyncStarredArticlesOperation(account: account, credentials: credentials, service: getStarredArticlesService, log: log)
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syncStarred.downloadProgress = downloadProgress
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syncStarred.addDependency(createFeedsOperation)
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self.operationQueue.addOperation(syncStarred)
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// Once this operation's dependencies, their dependencies etc finish, we can finish.
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let finishOperation = FeedlyCheckpointOperation()
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finishOperation.checkpointDelegate = self
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finishOperation.downloadProgress = downloadProgress
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finishOperation.addDependency(getStreamContents)
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finishOperation.addDependency(syncStarred)
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self.operationQueue.addOperation(finishOperation)
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}
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convenience init(account: Account, credentials: Credentials, caller: FeedlyAPICaller, database: SyncDatabase, lastSuccessfulFetchStartDate: Date?, downloadProgress: DownloadProgress, log: OSLog) {
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let newerThan: Date? = {
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if let date = lastSuccessfulFetchStartDate {
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return date
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} else {
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return Calendar.current.date(byAdding: .day, value: -31, to: Date())
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}
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}()
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self.init(account: account, credentials: credentials, lastSuccessfulFetchStartDate: newerThan, markArticlesService: caller, getUnreadService: caller, getCollectionsService: caller, getStreamContentsService: caller, getStarredArticlesService: caller, database: database, downloadProgress: downloadProgress, log: log)
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}
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override func cancel() {
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os_log(.debug, log: log, "Cancelling sync %{public}@", syncUUID.uuidString)
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self.operationQueue.cancelAllOperations()
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super.cancel()
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didFinish()
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// Operation should silently cancel.
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syncCompletionHandler = nil
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}
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override func main() {
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guard !isCancelled else {
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// override of cancel calls didFinish().
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return
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}
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os_log(.debug, log: log, "Starting sync %{public}@", syncUUID.uuidString)
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operationQueue.isSuspended = false
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}
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}
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extension FeedlySyncAllOperation: FeedlyCheckpointOperationDelegate {
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func feedlyCheckpointOperationDidReachCheckpoint(_ operation: FeedlyCheckpointOperation) {
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assert(Thread.isMainThread)
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os_log(.debug, log: self.log, "Sync completed: %{public}@", syncUUID.uuidString)
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syncCompletionHandler?(.success(()))
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syncCompletionHandler = nil
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didFinish()
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}
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}
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extension FeedlySyncAllOperation: FeedlyOperationDelegate {
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func feedlyOperation(_ operation: FeedlyOperation, didFailWith error: Error) {
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assert(Thread.isMainThread)
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os_log(.debug, log: log, "%{public}@ failed with error: %{public}@.", operation, error as NSError)
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syncCompletionHandler?(.failure(error))
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syncCompletionHandler = nil
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cancel()
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}
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}
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