118 lines
3.9 KiB
Swift
118 lines
3.9 KiB
Swift
//
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// FeedlySyncStreamContentsOperation.swift
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// Account
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//
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// Created by Kiel Gillard on 17/10/19.
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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 RSParser
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import Web
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import Secrets
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import Core
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final class FeedlySyncStreamContentsOperation: FeedlyOperation, FeedlyOperationDelegate, FeedlyGetStreamContentsOperationDelegate, FeedlyCheckpointOperationDelegate {
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private let account: Account
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private let resource: FeedlyResourceId
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private let operationQueue = MainThreadOperationQueue()
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private let service: FeedlyGetStreamContentsService
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private let newerThan: Date?
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private let isPagingEnabled: Bool
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private let log: OSLog
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private let finishOperation: FeedlyCheckpointOperation
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@MainActor init(account: Account, resource: FeedlyResourceId, service: FeedlyGetStreamContentsService, isPagingEnabled: Bool, newerThan: Date?, log: OSLog) {
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self.account = account
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self.resource = resource
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self.service = service
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self.isPagingEnabled = isPagingEnabled
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self.operationQueue.suspend()
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self.newerThan = newerThan
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self.log = log
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self.finishOperation = FeedlyCheckpointOperation()
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super.init()
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self.operationQueue.add(self.finishOperation)
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self.finishOperation.checkpointDelegate = self
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enqueueOperations(for: nil)
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}
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@MainActor convenience init(account: Account, credentials: Credentials, service: FeedlyGetStreamContentsService, newerThan: Date?, log: OSLog) {
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let all = FeedlyCategoryResourceId.Global.all(for: credentials.username)
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self.init(account: account, resource: all, service: service, isPagingEnabled: true, newerThan: newerThan, log: log)
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}
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override func run() {
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operationQueue.resume()
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}
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override func didCancel() {
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os_log(.debug, log: log, "Canceling sync stream contents for %{public}@", resource.id)
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operationQueue.cancelAllOperations()
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super.didCancel()
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}
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@MainActor func enqueueOperations(for continuation: String?) {
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os_log(.debug, log: log, "Requesting page for %{public}@", resource.id)
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let operations = pageOperations(for: continuation)
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operationQueue.addOperations(operations)
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}
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func pageOperations(for continuation: String?) -> [MainThreadOperation] {
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let getPage = FeedlyGetStreamContentsOperation(account: account,
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resource: resource,
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service: service,
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continuation: continuation,
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newerThan: newerThan,
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log: log)
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let organiseByFeed = FeedlyOrganiseParsedItemsByFeedOperation(account: account, parsedItemProvider: getPage, log: log)
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let updateAccount = FeedlyUpdateAccountFeedsWithItemsOperation(account: account, organisedItemsProvider: organiseByFeed, log: log)
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getPage.delegate = self
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getPage.streamDelegate = self
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organiseByFeed.addDependency(getPage)
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organiseByFeed.delegate = self
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updateAccount.addDependency(organiseByFeed)
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updateAccount.delegate = self
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finishOperation.addDependency(updateAccount)
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return [getPage, organiseByFeed, updateAccount]
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}
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@MainActor func feedlyGetStreamContentsOperation(_ operation: FeedlyGetStreamContentsOperation, didGetContentsOf stream: FeedlyStream) {
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guard !isCanceled else {
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os_log(.debug, log: log, "Cancelled requesting page for %{public}@", resource.id)
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return
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}
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os_log(.debug, log: log, "Ingesting %i items from %{public}@", stream.items.count, stream.id)
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guard isPagingEnabled, let continuation = stream.continuation else {
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os_log(.debug, log: log, "Reached end of stream for %{public}@", stream.id)
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return
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}
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enqueueOperations(for: continuation)
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}
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func feedlyCheckpointOperationDidReachCheckpoint(_ operation: FeedlyCheckpointOperation) {
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os_log(.debug, log: log, "Completed ingesting items from %{public}@", resource.id)
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didFinish()
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}
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func feedlyOperation(_ operation: FeedlyOperation, didFailWith error: Error) {
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operationQueue.cancelAllOperations()
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didFinish(with: error)
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}
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}
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