100 lines
3.3 KiB
Swift
100 lines
3.3 KiB
Swift
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//
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// FeedlyDownloadArticlesOperation.swift
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// Account
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//
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// Created by Kiel Gillard on 9/1/20.
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// Copyright © 2020 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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class FeedlyDownloadArticlesOperation: FeedlyOperation {
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private let account: Account
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private let log: OSLog
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private let missingArticleEntryIdProvider: FeedlyEntryIdentifierProviding
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private let updatedArticleEntryIdProvider: FeedlyEntryIdentifierProviding
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private let getEntriesService: FeedlyGetEntriesService
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private let operationQueue: OperationQueue
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private let finishOperation: FeedlyCheckpointOperation
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init(account: Account, missingArticleEntryIdProvider: FeedlyEntryIdentifierProviding, updatedArticleEntryIdProvider: FeedlyEntryIdentifierProviding, getEntriesService: FeedlyGetEntriesService, log: OSLog) {
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self.account = account
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self.operationQueue = OperationQueue()
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self.operationQueue.isSuspended = true
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self.missingArticleEntryIdProvider = missingArticleEntryIdProvider
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self.updatedArticleEntryIdProvider = updatedArticleEntryIdProvider
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self.getEntriesService = getEntriesService
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self.finishOperation = FeedlyCheckpointOperation()
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self.log = log
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super.init()
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self.finishOperation.checkpointDelegate = self
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self.operationQueue.addOperation(self.finishOperation)
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}
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override func cancel() {
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os_log(.debug, log: log, "Cancelling %{public}@.", self)
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operationQueue.cancelAllOperations()
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super.cancel()
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didFinish()
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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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var articleIds = missingArticleEntryIdProvider.entryIds
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articleIds.formUnion(updatedArticleEntryIdProvider.entryIds)
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os_log(.debug, log: log, "Requesting %{public}i articles.", articleIds.count)
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let feedlyAPILimitBatchSize = 1000
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for articleIds in Array(articleIds).chunked(into: feedlyAPILimitBatchSize) {
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let provider = FeedlyEntryIdentifierProvider(entryIds: Set(articleIds))
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let getEntries = FeedlyGetEntriesOperation(account: account, service: getEntriesService, provider: provider, log: log)
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getEntries.delegate = self
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self.operationQueue.addOperation(getEntries)
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let organiseByFeed = FeedlyOrganiseParsedItemsByFeedOperation(account: account,
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parsedItemProvider: getEntries,
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log: log)
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organiseByFeed.delegate = self
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organiseByFeed.addDependency(getEntries)
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self.operationQueue.addOperation(organiseByFeed)
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let updateAccount = FeedlyUpdateAccountFeedsWithItemsOperation(account: account,
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organisedItemsProvider: organiseByFeed,
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log: log)
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updateAccount.delegate = self
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updateAccount.addDependency(organiseByFeed)
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self.operationQueue.addOperation(updateAccount)
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finishOperation.addDependency(updateAccount)
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}
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operationQueue.isSuspended = false
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}
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}
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extension FeedlyDownloadArticlesOperation: FeedlyCheckpointOperationDelegate {
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func feedlyCheckpointOperationDidReachCheckpoint(_ operation: FeedlyCheckpointOperation) {
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didFinish()
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}
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}
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extension FeedlyDownloadArticlesOperation: 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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cancel()
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}
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}
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