NetNewsWire/Frameworks/Account/Feedly/Operations/FeedlyDownloadArticlesOpera...

98 lines
3.4 KiB
Swift

//
// FeedlyDownloadArticlesOperation.swift
// Account
//
// Created by Kiel Gillard on 9/1/20.
// Copyright © 2020 Ranchero Software, LLC. All rights reserved.
//
import Foundation
import os.log
import RSCore
import RSWeb
class FeedlyDownloadArticlesOperation: FeedlyOperation {
private let account: Account
private let log: OSLog
private let missingArticleEntryIdProvider: FeedlyEntryIdentifierProviding
private let updatedArticleEntryIdProvider: FeedlyEntryIdentifierProviding
private let getEntriesService: FeedlyGetEntriesService
private let operationQueue = MainThreadOperationQueue()
private let finishOperation: FeedlyCheckpointOperation
init(account: Account, missingArticleEntryIdProvider: FeedlyEntryIdentifierProviding, updatedArticleEntryIdProvider: FeedlyEntryIdentifierProviding, getEntriesService: FeedlyGetEntriesService, log: OSLog) {
self.account = account
self.operationQueue.suspend()
self.missingArticleEntryIdProvider = missingArticleEntryIdProvider
self.updatedArticleEntryIdProvider = updatedArticleEntryIdProvider
self.getEntriesService = getEntriesService
self.finishOperation = FeedlyCheckpointOperation()
self.log = log
super.init()
self.finishOperation.checkpointDelegate = self
self.operationQueue.add(self.finishOperation)
}
override func run() {
var articleIds = missingArticleEntryIdProvider.entryIds
articleIds.formUnion(updatedArticleEntryIdProvider.entryIds)
os_log(.debug, log: log, "Requesting %{public}i articles.", articleIds.count)
let feedlyAPILimitBatchSize = 1000
for articleIds in Array(articleIds).chunked(into: feedlyAPILimitBatchSize) {
let provider = FeedlyEntryIdentifierProvider(entryIds: Set(articleIds))
let getEntries = FeedlyGetEntriesOperation(account: account, service: getEntriesService, provider: provider, log: log)
getEntries.delegate = self
self.operationQueue.add(getEntries)
let organiseByFeed = FeedlyOrganiseParsedItemsByFeedOperation(account: account,
parsedItemProvider: getEntries,
log: log)
organiseByFeed.delegate = self
organiseByFeed.addDependency(getEntries)
self.operationQueue.add(organiseByFeed)
let updateAccount = FeedlyUpdateAccountFeedsWithItemsOperation(account: account,
organisedItemsProvider: organiseByFeed,
log: log)
updateAccount.delegate = self
updateAccount.addDependency(organiseByFeed)
self.operationQueue.add(updateAccount)
finishOperation.addDependency(updateAccount)
}
operationQueue.resume()
}
override func didCancel() {
// TODO: fix error on below line: "Expression type '()' is ambiguous without more context"
//os_log(.debug, log: log, "Cancelling %{public}@.", self)
operationQueue.cancelAllOperations()
super.didCancel()
}
}
extension FeedlyDownloadArticlesOperation: FeedlyCheckpointOperationDelegate {
func feedlyCheckpointOperationDidReachCheckpoint(_ operation: FeedlyCheckpointOperation) {
didFinish()
}
}
extension FeedlyDownloadArticlesOperation: FeedlyOperationDelegate {
func feedlyOperation(_ operation: FeedlyOperation, didFailWith error: Error) {
assert(Thread.isMainThread)
// Having this log is useful for debugging missing required JSON keys in the response from Feedly, for example.
os_log(.debug, log: log, "%{public}@ failed with error: %{public}@.", String(describing: operation), error as NSError)
cancel()
}
}